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Dr.G.R.Damodaran College of Science(Autonomous, affiliated to
the Bharathiar University, recognized by the UGC)Re-accredited at
the 'A' Grade Level by the NAAC and ISO
9001:2008 CertifiedCRISL rated 'A' (TN) for MBA and MIB
Programmes
I BCA (2013 - 2016)SEMESTER I
Core : Computer Oraganization and Architecture - 106AMultiple
Choice Questions.
1. A Binary number system has ____________ digits. A. zero. B.
one. C. two. D. three. ANSWER: C
2. ______ computers are the binary number system. A. Analog. B.
Super. C. Intra. D. Digital. ANSWER: D
3. A ____ digit is called a bit. A. decimal. B. binary. C.
octal. D. hexadecimal. ANSWER: B
4. The ___________ of the computer consists of physical entity
of the device. A. software. B. middleware. C. hardware. D.
firmware. ANSWER: C
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5. Computer ______ consists of instructions and data that
computer manipulates to perform data processing tasks. A. software.
B. middleware. C. hardware. D. firmware. ANSWER: A
6. A sequence of instructions for the computer is
called____________. A. hardware. B. program. C. data. D.
instruction. ANSWER: B
7. ________ is concerned with the way the hardware components
operate to form computer system. A. Computer organization. B.
Computer design. C. Computer architecture. D. Computer
implementation. ANSWER: A
8. The manipulation of binary information is done by logic
circuits called __________. A. blocks. B. gates. C. symbols. D.
functions. ANSWER: B
9. Each gate can be represented in tabular form by a __________.
A. symbols. B. function. C. truth table. D. logic. ANSWER: C
10. If both inputs A and B are equal to 1 in AND gate, the
output is_______. A. zero. B. one. C. don't care. D. binary.
ANSWER: B
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11. _________ algebra deals with binary variables and logic
operations. A. Boolean. B. Numerical. C. Binary. D. Logic. ANSWER:
A
12. A Boolean function can be translated from ______________
expression into a logic diagram. A. boolean. B. logical. C.
relational. D. algebric. ANSWER: D
13. The map simplification method is also known as ___________
map. A. karnaugh. B. algebric. C. basic. D. binary. ANSWER: A
14. The condition when it does not matter if the function
produces 0 or 1 for a given minterm is ________________. A. SOP. B.
POS. C. NOR. D. don't care. ANSWER: D
15. A _________ circuit is a connected arrangement of logic
gates with a set of inputs and outputs. A. arithmetic. B. logic. C.
combinational. D. shift. ANSWER: C
16. The addition of 2 binary digits is done by ___________
circuit. A. half adder. B. full adder. C. BCD adder. D. composite
adder. ANSWER: A
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17. A _________ is a combinational circuit that forms sum of 3
input bits. A. half adder. B. full adder. C. BCD adder. D.
composite adder. ANSWER: B
18. The storage element employed in clocked sequential circuit
is called ___________. A. memory. B. flipflop. C. circuit. D.
subtractor. ANSWER: B
19. Dynamic input in SR flip-flop is designated by __________
shaped symbol. A. arrowhead. B. circle. C. rectangle. D. triangle.
ANSWER: A
20. In flip-flop input R stands for __________. A. read. B.
reset. C. reimburse. D. rectangle. ANSWER: B
21. The _________ flip-flop is a slight modification of SR
flip-flop. A. JK. B. T. C. edge triggered. D. D. ANSWER: D
22. In T flip-flop T stands for ___________. A. technical. B.
toggle. C. trigger. D. type edged. ANSWER: B
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23. Special input terminal for setting the flip-flop is called
______. A. clear. B. set. C. preset. D. reset. ANSWER: C
24. A _____________ circuit is an interconnection of flip-flops
and gates. A. combinational. B. arithmetic. C. shift. D.
sequential. ANSWER: D
25. The state table of sequential circuit consists of __________
sections. A. one. B. two. C. three. D. four. ANSWER: D
26. The ____________ state shows the states of flip-flops A and
B at any given time t. A. input. B. next. C. present. D. output.
ANSWER: C
27. The ___________ section gives a value of x for present
state. A. next. B. input. C. present. D. output. ANSWER: B
28. In logic gates, a bubble is represented by a ____________.
A. triangle. B. square. C. circle. D. rectangle. ANSWER: C
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29. The __________ number inside each circle identifies the
state of flip-flops. A. octal. B. binary. C. decimal. D.
hexadecimal ANSWER: B
30. Digital circuits are constructed with ______ circuits. A.
arithmetic. B. logic. C. integrated. D. shift. ANSWER: C
31. ____________ devices have a complexity of approximately 10
to 200 gates in a single package. A. MSI. B. LSI. C. IC. D. VLSI.
ANSWER: A
32. TTL stands for __________ logic. A. transistor-transmission.
B. transistor-transistor. C. transmission-transistor. D.
transmission-transmission. ANSWER: A
33. The multiplexer is also called ________ selector since it
selects one of many data inputs. A. line. B. data. C. binary. D.
octal. ANSWER: B
34. A _______ is a digital circuit that performs the inverse
operation of a decoder. A. multiplexer. B. adder. C. subtractor. D.
encoder. ANSWER: D
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35. When the number of bits in the sum exceeds the number of
bits in each of the numbers added ___________ results. A. inflow.
B. outflow. C. overflow. D. exceed. ANSWER: C
36. A ________ is a group of flip-flops. A. memory. B. circuit.
C. register. D. bits. ANSWER: C
37. A register is capable of storing __________ bit of
information. A. one. B. two. C. three. D. four. ANSWER: A
38. The transformation of new information into a register is
__________ the register. A. moving. B. registering. C. loading. D.
translating. ANSWER: C
39. The _______ input in the register determines the action to
be taken with each clock pulse. A. buffer. B. register. C. load. D.
zero. ANSWER: C
40. In shift register,_____ input determines the shift what goes
into the leftmost position during the shift. A. serial. B. buffer.
C. register. D. zero. ANSWER: A
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41. There are ________ basic arithmetic operations. A. one. B.
two. C. three. D. four. ANSWER: D
42. The arithmetic processor is simple if it has only fixed
point ________ instruction. A. add. B. subtract. C. multiply. D.
division. ANSWER: A
43. The solution to any problem stated by a finite number of
procedural steps is _________. A. procedure. B. algorithm. C.
subprogram. D. specification. ANSWER: B
44. During addition of 2 numbers signs of A and B are _________
compare the magnitude. A. same. B. different. C. large. D. small.
ANSWER: B
45. ____________ algorithm gives a procedure for multiplying
binary integers in signed 2's complement representation. A.
Hardware. B. Booth. C. Multiplicand. D. Multiplication ANSWER:
B
46. The multiplication of 2 floating point numbers is done by
___________ the mantissa and _________ the exponents. A.
multiply,add. B. add,multiply. C. subtract,divide. D. add,subtract.
ANSWER: A
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47. A decimal arithmetic unit is a ___________ function that
performs decimal micro operations. A. analog. B. logical. C.
digital. D. boolean. ANSWER: C
48. A straight subtraction of 2 numbers requires a __________
circuit. A. BCD adder. B. subtractor. C. division. D. subtractor
ANSWER: B
49. The means of entering information into computer is through a
___________. A. mouse. B. keyboard. C. printer. D. monitor ANSWER:
B
50. The ___________ subsystem of a computer provides
communication between central system and outside environment. A.
input/output. B. input. C. output. D. exit. ANSWER: A
51. Computer system includes special hardware called
_____________ between CPU and peripherals to supervise and
synchronize input and output transfers. A. peripheral. B. links. C.
interface D. byte. ANSWER: C
52. PSW stands for _________. A. peripheral status word. B.
program status word. C. poly status word byte. D. program segment
word ANSWER: B
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53. A _______________ interrupt is a system that establishes a
priority over sources to determine which condition to service
first. A. software. B. hardware. C. priority. D. device. ANSWER:
C
54. Convert the following decimal number to binary: 1998. A.
11111001110. B. 111111101110. C. 111100011110. D. 111000111000
ANSWER: A
55. The CPU responds to the interrupt signal by storing the
___________ address from program counter. A. stack. B. memory. C.
return. D. I/O. ANSWER: C
56. In a _______________ interrupt, the branch address is
assigned to fixed location in memory. A. vector. B. non vector. C.
pipeline. D. priority. ANSWER: B
57. In ________ interrupt, the branch address is either a fixed
location in memory or is stored in a fixed location in memory. A.
priority. B. address. C. vectored. D. non vector ANSWER: D
58. I/O routines issue control commands to check the _________
status. A. memory. B. vector. C. device. D. address ANSWER: C
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59. Devices that provide backup storage are called ___________
memory. A. main. B. auxiliary. C. backup. D. device. ANSWER: B
60. The memory unit that directly communicates with CPU is
called __________ memory. A. main. B. auxiliary. C. device. D.
backup. ANSWER: A
61. The ____________ memory access time is less than the access
time of the main memory. A. virtual. B. associative. C. cache. D.
mapping. ANSWER: C
62. Many OS enable the CPU to proceeds a number of independent
programs concurrently called ____________ A. multitasking. B.
multiprogramming. C. multi processing. D. multiple functions
ANSWER: B
63. RAM stands for _________. A. random access memory. B. random
memory. C. read only memory. D. read access memory. ANSWER: A
64. Static RAM connects of flip-flops to store ______________
information's. A. octal. B. binary. C. decimal. D. hexadecimal
ANSWER: B
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65. RAM is _______________ its contents are destroyed when power
is turned off. A. non volatile. B. permanent. C. volatile. D.
initial. ANSWER: A
66. Initial program is stored in ROM portion of main memory
called _____________ loader. A. linking. B. volatile. C. non
volatile. D. bootstrap. ANSWER: D
67. The ___________ map is pictorial representation of assigned
address space for each chip in the system. A. memory address. B.
link address. C. register address. D. loader address. ANSWER: A
68. A tract in magnetic disk in a given sector near the
circumstance is ________ than near the centre. A. smaller. B.
longer. C. thinner. D. bigger. ANSWER: B
69. A disk drive with removable disks is called _____________
disk. A. magnetic tape. B. magnetic. C. floppy. D. record. ANSWER:
C
70. A memory unit accessed by content is ___________ memory. A.
virtual. B. cache. C. mapping. D. associative. ANSWER: D
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71. References to memory within a few localized areas in memory
referred as ___________ of reference. A. locality. B. memory. C.
array. D. phenomenon ANSWER: A
72. The performance of cache memory is measured in terms of
___________ ratio. A. loss. B. hit. C. percentage. D. average.
ANSWER: B
73. When the CPU refers to memory & find the word in cache
it is called __________. A. hit. B. miss. C. map. D. success.
ANSWER: A
74. The transformation of date from main memory to cache memory
is called ____________ process. A. execution. B. mapping. C.
unmapping. D. loading. ANSWER: B
75. The basic component of arithmetic circuit is________. A.
parallel subtractor. B. parallel adder. C. half adder. D. full
adder. ANSWER: B
76. The micro operation that specifies binary operations for
strings of bits stored in registers are___________. A. logic micro
operation. B. shift micro operation. C. arithmetic micro operation.
D. register transfer micro operation ANSWER: A
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77. The addition and subtraction operations can be combined into
one common circuit by including a _______________ gate with each
full adder. A. exclusive-OR. B. AND. C. OR. D. NAND. ANSWER: A
78. The name of the operation that complements bits in A
register where there are corresponding 1's in B register is
_______. A. selective set. B. selective complement. C. selective
clear. D. mask. ANSWER: B
79. LIFO stands for _______________. A. last in flag out. B.
last in first out. C. loop in first out. D. loop in flag out
ANSWER: B
80. The storage devices that stores information in a manner that
the item stored last in first item retrieved is__________. A.
queue. B. stack. C. CPU. D. register. ANSWER: B
81. The operation of deletion in stack is____________. A. PUSH.
B. POP. C. FRONT. D. REAR. ANSWER: B
82. SP stands for _____________. A. Storage Pointer. B. Seek
Pointer. C. Stack Pointer. D. Synchronous Pointer ANSWER: C
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83. The expansion of RPN is ____________. A. Reverse Polish
Notation. B. Review Polish Notation. C. Reverse Pointer Notation.
D. Review Pointer Notation. ANSWER: A
84. The notation A+B is ______________. A. prefix notation. B.
postfix notation. C. infix notation. D. none of these. ANSWER:
C
85. The bits of the instruction are divided into groups
called______________. A. formats. B. fields. C. bytes. D. address.
ANSWER: B
86. ADD R1, A, B is_______________. A. zero address instruction
format. B. one address instruction format. C. two address
instruction format. D. three address instruction format. ANSWER:
D
87. RISC stands for_____________. A. Reduced Instruction Set
Computer. B. Reverse Instruction Set Computer. C. Reduced Implied
Set Computer. D. Reverse Implied Set Computer. ANSWER: A
88. The mode in which the effective address is equal to the
address part of instruction is ______. A. indirect addressing mode.
B. direct addressing mode. C. register addressing mode. D. relative
addressing mode. ANSWER: B
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89. The instruction that performs arithmetic, logic and shift
operations are____________. A. data transfer instruction. B. data
manipulation instruction. C. register transfer instruction. D.
program control instruction. ANSWER: B
90. The mnemonic used for increment are___________. A. INX. B.
INC. C. INR. D. INL. ANSWER: B
91. SISD stands for_____________. A. Single Instruction stream,
Single Data stream. B. Simple Instruction stream, Simple Data
stream. C. Stack Instruction stream, Stack Data stream. D. Storage
Instruction stream, Storage Data stream. ANSWER: A
92. The instruction provides decision making capabilities
are___________. A. data transfer instruction. B. data manipulation
instruction. C. register transfer instruction. D. program control
instruction. ANSWER: D
93. The ____________ contains an address to specify the desired
location in the memory. A. word count register. B. address
register. C. control register. D. None of the above. ANSWER: B
94. The step by step procedure is______________. A. flow chart.
B. control flow graph. C. algorithm. D. pseudo code. ANSWER: C
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95. MISD means______________. A. Multiple Instruction stream,
Single Data stream. B. Memory Instruction stream, Single Data
stream. C. Multiple Instruction stream, Storage Data stream. D.
Memory Instruction stream, Storage Data stream. ANSWER: A
96. DR stands for_______________. A. Direct Register. B. Data
Register. C. Division Register. D. Decrement Register ANSWER: A
97. The addressing mode where the operands are specified
implicitly in the definition of the register are_______________. A.
register addressing mode. B. immediate addressing mode C. indirect
addressing mode. D. implied addressing mode. ANSWER: D
98. The instructions that cause transfer of data from one
location to another without changing the binary information content
are_______________. A. data transfer instruction. B. data
manipulation instruction. C. register transfer instruction. D.
program control instruction. ANSWER: A
99. The Mnemonic used for exchanging instruction
is______________. A. ECH. B. XCH. C. EXH. D. EHX. ANSWER: B
100. Status bits are also called_______________. A. set bits. B.
reset bits. C. flag bits. D. selection bits. ANSWER: C
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101. The processor that performs computations on large arrays of
data is ______________. A. auxiliary processor. B. array processor.
C. attached processor. D. arithmetic processor. ANSWER: B
102. The computer code for interchanging the information between
terminals is___________. A. ASCII. B. BCD. C. EBCDIC. D. CDIE.
ANSWER: A
103. A byte consists of____________. A. one bit. B. four bits.
C. eight bits. D. sixteen bits. ANSWER: C
104. The mnemonic used for clear instruction are__________. A.
CLR. B. CLX. C. CLC. D. CRL. ANSWER: A
105. The notation AB+ is____________. A. prefix notation. B.
postfix notation. C. arithmetic notation. D. infix notation.
ANSWER: B
106. The field that specifies the way the operand or the
effective address is determined is ____________. A. processor
field. B. mode field. C. operation code field. D. address field.
ANSWER: C
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107. The Instruction MUL R1, R2 is__________. A. zero address
instruction format. B. one address instruction format. C. two
address instruction format. D. three address instruction format.
ANSWER: C
108. TOS represents______________. A. Top Of Simulator. B. Top
Of Stack. C. Top Of Storage. D. Top Of System. ANSWER: B
109. The 10's complement of a decimal number is equal to its
_____________. A. 9's complement + 1. B. 9's complement - 1. C. 8's
complement + 2. D. 8's complement - 2. ANSWER: A
110. AR represents____________. A. Auto Register. B. Address
Register. C. Auxiliary Register. D. Associate Register. ANSWER:
B
111. The addressing mode where the controls of an index register
is added to the address part of the instruction_____. A. relative
addressing mode. B. direct addressing mode. C. indexed addressing
mode. D. immediate addressing mode. ANSWER: B
112. The mnemonic used for the instruction output is_________.
A. OUTPUT. B. OUT. C. O/P. D. OT. ANSWER: B
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113. The instructions that perform binary operations on strings
of bits stored in registers_______. A. logical instructions. B.
shift instructions. C. arithmetic instructions. D. complement
instructions. ANSWER: A
114. The mnemonic used for skip instruction are______. A. SKIP.
B. SKI. C. SKP. D. SK. ANSWER: C
115. The interrupt that comes from input/output devices
are___________. A. internal interrupts. B. external interrupts. C.
software interrupts. D. hardware interrupts. ANSWER: B
116. The term that provides simultaneous data processing tasks
are____________. A. parallel processing. B. array processing. C.
vector processing. D. distributed processing. ANSWER: A
117. Any method for controlling access to or use of memory is
known as ________. A. memory map. B. memory protection. C. memory
management. D. memory instruction. ANSWER: B
118. The ________ holds the number of words to be transferred to
the memory. A. word count register B. address register. C. control
register. D. program register ANSWER: A
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119. The ___________ specifies the mode of transfer to the
desired location in the memory A. word count register. B. address
register. C. control register. D. program register ANSWER: C
120. BCD represents_______. A. Binary Coded Decimal. B. Binary
Coded Data. C. Binary Computational Decimal D. Binary Computational
Data ANSWER: A
121. The algorithm that gives a procedure for multiplying binary
integer in signed 2's complement representation is_______. A.
binary algorithm. B. boolean algorithm. C. booth algorithm. D.
fixed algorithm. ANSWER: C
122. The command that causes the interface to respond by
transferring data from the bus into one of its registers__________.
A. data input command. B. data output command. C. data control
command. D. data status command. ANSWER: B
123. Binary information is represented in digital computers by
physical quantities called______. A. signals. B. bits. C. volts. D.
symbols. ANSWER: A
124. The expansion of BCD is ________________. A. Binary Codiac
Decimal. B. Binary Coded Decimal. C. Binary Coded Digit. D. Binary
Codiac Digit. ANSWER: B
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125. The two variable K map consist of ________ boxes. A. 3 B. 4
C. 6 D. 8 ANSWER: B
126. The base or radix of octal number system is _______________
A. 2 B. 16 C. 10 D. 8 ANSWER: D
127. The base or radix of hexadecimal number system is
_____________ A. 2 B. 16 C. 10 D. 8 ANSWER: B
128. RAM represents _____________ A. read access memory B.
random access memory C. rotate access memory D. reverse access
memory ANSWER: B
129. The flip flop used to synchronize the state change during a
clock pulse transition is ___________ A. JK flip flop. B. T flip
flop C. edge triggered flip flop. D. RS flip flop. ANSWER: C
130. The relationship between a function and its binary
variables can be represented in _________ A. boolean function. B.
truth table. C. logic diagram. D. combinational circuits. ANSWER:
B
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131. The NOR gate is complement of ________ A. AND gate B. OR
gate C. NAND gate D. NOT gate ANSWER: B
132. The theorem which deals with NOR and NAND gates are ______
A. demorgan's theorem B. baye's theorem C. boolean's theorem D.
booth's theorem ANSWER: A
133. The ALS represents _____________ A. Arithmetic Logic Shift
Unit. B. Auto Logic Shift Unit. C. Arithmetic Logic Simple Unit. D.
Auto Logic Shift Unit. ANSWER: A
134. The mnemonic used for halt computer _____________ A. HALT
B. HAT C. HLT D. HTL ANSWER: C
135. The program that translates a high level language program
into binary is called __________ A. translator. B. compiler. C.
interpreter. D. simulator. ANSWER: B
136. A set of common instruction that can be used in a program
many times is called a __________ A. function. B. subroutine. C.
method. D. structure. ANSWER: B
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137. A memory that is part of a control unit is referred to as
___________ A. primary memory. B. secondary memory. C. control
memory. D. virtual memory. ANSWER: C
138. The register that keeps track of the instructions in the
program stored in memory is __________ A. control register B.
program register C. status register D. direct register ANSWER:
B
139. The addressing mode the operands are in registers that
reside within CPU is ___________ A. register mode. B. register
indirect mode. C. implied mode. D. indexed addressing mode. ANSWER:
A
140. The sequence of instruction read from memory constitutes an
_________ A. instruction stream. B. data stream. C. implied stream.
D. immediate stream. ANSWER: A
141. The conflicts that arise when an instruction depends on the
result of a previous instruction is called _________ A. resource
conflicts B. branch difficulties. C. data dependency conflicts. D.
data independency conflicts. ANSWER: C
142. The part of a processor unit that executes arithmetic
operations is _______ A. array processor. B. arithmetic processor.
C. vector processor. D. multiprocessor. ANSWER: B
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143. In addition algorithm, the signs of A and B are __________
A. identical. B. different. C. dissimilar. D. asymmetry ANSWER:
A
144. Floating point division requires that the exponent be
subtracted and the ___________ are divided. A. exponents. B.
mantissas C. radix. D. base. ANSWER: B
145. The communication between central system and the outside
environment is done by ____________ A. input-output subsystem. B.
control system. C. memory system. D. logic system. ANSWER: A
146. The mnemonic used for the name rotate left is _________ A.
ROL B. ROTL C. RTAL D. RTEL ANSWER: A
147. In NAND gate, if both the inputs are 1,the output will be
________ A. no output B. 1 C. 0 D. both b & c ANSWER: C
148. The mnemonic used for test instruction is ___________ A.
TST B. TSX C. TSC D. TET ANSWER: A
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149. The base or radix of decimal number system is ____________
A. 2 B. 16 C. 10 D. 8 ANSWER: C
150. The operations performed on the data in the processor
constitutes __________ A. instruction stream. B. pipeline stream.
C. data stream. D. multiple stream. ANSWER: C
151. The conflicts that arise from branch and other instructions
that change the value of program counter is ______________ A.
resource conflicts. B. branch difficulties. C. data dependency
conflicts. D. data independency conflicts. ANSWER: B
152. The access method of RAM is ___________ if bits are
considered the unit of data access. A. random B. parallel C. serial
D. direct ANSWER: B
153. Software programs permanently stored in a read only memory
(ROM) are called _________ A. software B. firmware C. hardware D.
vaporware ANSWER: B
154. Which of the following are the two main components of the
CPU? A. Control unit and registers. B. Registers and main memory.
C. Control unit and ALU. D. Control unit and ALU. ANSWER: D
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155. The two basic types of record access methods are ________
A. sequential and random. B. sequential and indexed. C. direct and
immediate. D. online and real time. ANSWER: A
156. Which of the following is used as a primary storage device?
A. Magnetic drum. B. PROM. C. Floppy disk. D. Optic Reader. ANSWER:
B
157. A collection of 8 bits is called _________ A. byte B. word
C. record D. field ANSWER: A
158. CD-ROM stands for _________ A. Compactable Read Only
Memory. B. Compact Data Read Only Memory. C. Compactable Disk Read
Only Memory. D. Compact Disk Read Only Memory. ANSWER: D
159. ALU is _________ A. Arithmetic Logic Unit. B. Array Logic
Unit. C. Application Logic Unit. D. Array Lack Unit. ANSWER: A
160. MSI stands for ________ A. Medium Scale Integrated
Circuits. B. Medium System Integrated Circuits. C. Medium Scale
Intelligent Circuit. D. Medium System Intelligent Circuit. ANSWER:
A
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161. MICR stands for ____________ A. Magnetic Ink Character
Reader. B. Magnetic Ink Code Reader. C. Magnetic Ink Cases Reader.
D. Magnetic Ignition Character Reader. ANSWER: A
162. What is the control unit's function in the CPU? A. to
transfer data to primary storage. B. to store program instruction.
C. to perform logic operations. D. to decode program instruction.
ANSWER: D
163. What is meant by a dedicated computer? A. Used by one
person only. B. Assigned to one and only one task. C. Does one kind
of software. D. Meant for application software only. ANSWER: B
164. The most common addressing techniques employed by a CPU is
___________ A. immediate. B. direct. C. indirect. D. direct,
indirect, register, immediate. ANSWER: D
165. A micro program written as string of 0's and 1's is a
___________ A. symbolic microinstruction B. binary
microinstruction. C. symbolic microprogram. D. binary microprogram.
ANSWER: D
166. Interrupts which are initiated by an instruction are
_________ A. internal. B. external. C. hardware. D. software.
ANSWER: B
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167. Memory access in RISC architecture is limited to
___________ and _______ instructions. A. CALL and RET. B. PUSH and
POP. C. STA and LDA. D. MOV and JMP. ANSWER: C
168. How many address lines are needed to address each memory
locations in a 2048* 4 memory chip? A. 10 B. 11 C. 8 D. 12 ANSWER:
B
169. In immediate addressing the operand is placed _________ A.
in the CPU register. B. after OP code in the instruction. C. in
memory. D. in stack. ANSWER: B
170. Microprocessor 8085 can address location up to __________
A. 32K B. 128K C. 64K D. 1M ANSWER: C
171. . The ALU and control unit of most of the microcomputers
are combined and manufacture on a single silicon chip. What is it
called? A. Monochip. B. Microprocessor. C. ALU. D. Control unit.
ANSWER: B
172. When the RET instruction at the end of subroutine is
executed _______ A. the information where the stack is initialized
is transferred to the stack pointer. B. the memory address of the
RET instruction is transferred to the program counter. C. two data
bytes stored in the top two locations of the stack are transferred
to the program counter. D. two data bytes stored in the top two
locations of the stack are transferred to the stack pointer.
ANSWER: C
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173. A microprogram is sequencer perform the operation _______
A. read. B. write. C. execute. D. read and execute. ANSWER: D
174. The base or radix of binary number system is _________ A. 2
B. 16 C. 10 D. 8 ANSWER: A
175. Which statement is valid about magnetic tape? A. It is a
plastic ribbon. B. It is coated on both sides with iron oxide. C.
It can be erased and reused. D. All of above. ANSWER: D
176. The data recording format in most of the modern magnetic
tape is __________ A. 7-bit ASCII. B. 7-bit EBCDIC. C. 8-bit ASCII.
D. 8-bit EBCDIC. ANSWER: D
177. Which of the following is associated with error detector?
A. Odd parity bit. B. Even parity bit. C. Both of the above. D.
Clarity. ANSWER: C
178. Tape speed is measured in ________ A. feet per second. B.
inch per second. C. meter per second. D. centimeter per second.
ANSWER: B
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179. Magnetic disks are the most popular medium for _________ A.
direct access. B. sequential access. C. both of above. D. none of
above. ANSWER: C
180. Storage capacity of magnetic disk depends on ________ A.
tracks per inch of surface. B. bits per inch of tracks. C. disk
pack in disk surface. D. all of above. ANSWER: D
181. Reading data is performed in magnetic disk by __________ A.
read/write leads. B. sectors. C. track. D. lower surface. ANSWER:
A
182. Access time is __________ A. seek time + latency time. B.
seek time. C. seek time - latency time. D. latency time. ANSWER:
A
183. Seek time is _______ A. time to position the head over
proper track. B. time to position the head over proper sector. C.
time to position the head over proper cylinder. D. none of above.
ANSWER: A
184. Latency time is _________ A. time to spin the needed data
under head. B. time to spin the needed data under track. C. time to
spin data under sector. D. all of above. ANSWER: A
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185. Floppy disks are available in _________ A. single side
single density. B. single side double density. C. both of above. D.
none of above. ANSWER: C
186. Floppy disks typically in diameter _________ A. 3'' B.
5.25'' C. 8'' D. all the above ANSWER: D
187. Hard disk is coated in both side above _________ A.
magnetic metallic oxide. B. optical metallic oxide. C. carbon
layer. D. all of the above. ANSWER: A
188. Binary circuit elements have _________ A. one stable state.
B. two stable state. C. three stable state. D. zero state. ANSWER:
B
189. Which statement is valid? A. 1KB = 1024 bytes B. 1 MB =
2048 bytes C. 1 Mb = 1000 kilobytes D. 1 Kb = 1000 bytes ANSWER:
A
190. Which statement is valid about computer program? A. It is
understood by a computer. B. It is understood by programmer. C. It
is understood by the user. D. Both of above. ANSWER: D
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191. Software in computer __________ A. enhances the
capabilities of the hardware machine. B. increase the speed of
central processing unit. C. both of above. D. decreases the speed
of central processing unit. ANSWER: A
192. Which of the following is not computer language? A. High
level language. B. Medium level language. C. Low level language. D.
All of the above. ANSWER: B
193. Which language is directly understood by the computer
without translation program? A. Machine language. B. Assembly
language. C. High level language. D. None of above. ANSWER: A
194. Instruction in computer languages consists of _________ A.
opcode. B. operand. C. both of above. D. all zero's ANSWER: C
195. Machine language is __________ A. machine dependent. B.
difficult to program. C. error prone. D. machine independent.
ANSWER: D
196. A floppy disk contains _______ A. circular tracks only. B.
sectors only. C. both circular tracks and sectors. D. neither
circular nor sector. ANSWER: C
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197. The octal equivalent of 111010 is __________ A. 81 B. 72 C.
71 D. 82 ANSWER: B
198. A computer program that converts an entire program into
machine language at one time is called a/an ______ A. interpreter.
B. simulator. C. compiler. D. commander. ANSWER: C
199. UNIVAC is _________ A. universal Automatic Computer. B.
universal Array Computer. C. unique Automatic Computer. D. unvalued
Automatic Computer. ANSWER: A
200. Example for zero address instructions is __________ A.
push. B. load a. C. move r1,a D. store x. ANSWER: A
201. Where does a computer add and compare data? A. Hard disk.
B. Floppy disk. C. CPU chip. D. Memory chip. ANSWER: C
202. Which of the following registers is used to keep track of
address of the memory location where the next instruction is
located? A. Memory address register. B. Memory data register. C.
Instruction register. D. Program register. ANSWER: D
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203. A complete microcomputer system consists of _________ A.
microprocessor. B. memory. C. peripheral equipment. D. all of
above. ANSWER: D
204. CPU performs _______ operation. A. data transfer. B. logic
operation. C. arithmetic operation. D. all the above. ANSWER: D
205. The technique which allows the DMA controller to transfer
one data word at a time, after which it must return control of the
buses to the CPU is known as _______ A. bus request. B. cycle
stealing. C. bus grant. D. burst transfer. ANSWER: B
206. A stack is _____ A. an 8-bit register in the
microprocessor. B. a 16-bit register in the microprocessor. C. a
set of memory locations in R/W mode reserved for storing
information temporarily during the execution of computer. D. a
16-bit memory address stored in the program counter. ANSWER: C
207. A stack pointer is ________ A. a 16-bit register in the
microprocessor that indicate the beginning of the stack memory. B.
a register that decodes and executes 16-bit arithmetic expression
C. The first memory location where a subroutine address is stored.
D. a register in which flag bits are stored. ANSWER: A
208. The branch logic that provides decision making capabilities
in the control unit is known as _________ A. controlled transfer.
B. conditional transfer. C. unconditional transfer. D. none of
above. ANSWER: C
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209. The decimal number 10 is represented in the Hexadecimal
Number System as _________ A. B B. C C. D D. A ANSWER: D
210. A time sharing system imply _________ A. more than one
processor in the system. B. more than one program in memory. C.
more than one memory in the system. D. none of above. ANSWER: B
211. Processors of all computers, whether micro, mini or
mainframe must have__________ A. ALU. B. primary storage. C.
control unit. D. all of above. ANSWER: D
212. The decimal number 11 is represented in the hexadecimal
number system as ______ A. B B. C C. D D. A ANSWER: A
213. The octal number 735 is represented in the decimal number
system as ________ A. 478 B. 477 C. 487 D. 774 ANSWER: B
214. The decimal number 250.5 is represented in the hexadecimal
number system as A. FA.B B. 8C.F C. FA.8 D. AF.8 ANSWER: C
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215. Ripple counters are sometimes called as ____________
counters. A. BCD. B. synchronous. C. asynchronous. D. None of
these. ANSWER: C
216. Which of the following code is used in present day
computing was developed by IBM corporation? A. ASCII. B. Hollerith
Code. C. Baudot code. D. EBCDIC code. ANSWER: D
217. When a subroutine is called, the address of the instruction
following the CALL instructions stored in/on the _________ A. stack
pointer. B. accumulator. C. program counter. D. stack. ANSWER:
D
218. A microprogram written as string of 0's and 1's is a
___________ A. symbolic microinstruction. B. binary
microinstruction. C. symbolic microprogram. D. binary microprogram.
ANSWER: D
219. The decimal number 14 is represented in the hexadecimal
number system as _________ A. B B. E C. D D. A ANSWER: B
220. decimal number 15 is represented in the hexadecimal number
system as _______ A. F B. C C. D D. A ANSWER: A
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221. The decimal number 16 is represented in the hexadecimal
number system as __________ A. F B. C C. H D. A ANSWER: C
222. The ascending order or a data hierarchy is _________ A. bit
-bytes - fields - record - file - database. B. bit - bytes- record
- field -file - database. C. bytes - bit - field- record - file -
database. D. bytes- bit -record - field - file -database. ANSWER:
A
223. Excess-3 Codes are _______ A. sequential. B. binary. C.
BCD. D. weighted. ANSWER: A
224. An Excess-3 code is obtained by adding _______ to a decimal
number. A. 6 B. 3 C. 33 D. 2 ANSWER: B
225. Arithmetic operations in a computer are done using binary
numbers and not decimal numbers and these take place in it
__________ unit. A. arithmetic. B. logic. C. control. D. memory.
ANSWER: A
226. The position of 0 or 1 in a binary number indicates its
________ within the number. A. weight. B. position. C. place. D.
order. ANSWER: A
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227. In the minterm, a variable appears either in complemented
form if it possesses a value of _______ A. 3 B. 0 C. 1 D. 2 ANSWER:
B
228. In the maxterm, a variable appears either in complemented
form if it possesses a value of __________ A. 3 B. 0 C. 1 D. 2
ANSWER: C
229. A micro program is sequencer perform the operation of
________ A. read. B. write. C. read and write. D. read and execute.
ANSWER: D
230. In the minterm, a variable appears either in uncomplemented
form if it possesses a value of ________ A. 3 B. 0 C. 1 D. 2
ANSWER: C
231. The binary equivalent of 43 is ______ A. 100101. B. 101011.
C. 101010. D. 101110. ANSWER: B
232. The gate that gives 1 output if any one of the input is 1,
IS _______ A. AND B. NAND C. NOT D. OR ANSWER: D
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233. MOD 10 counter will count up to ________ A. 7 B. 8 C. 6 D.
9 ANSWER: D
234. With respect to Boolean Algebra, A.1 = ? A. A B. 1 C. 0 D.
None ANSWER: B
235. 8085 has ________ data lines. A. 8 B. 16 C. 32 D. None
ANSWER: B
236. MVI A, 55 H is an example for _________ addressing mode. A.
direct. B. register. C. immediate. D. none. ANSWER: C
237. _________ is used to eliminate the speed mismatch between
processor and IO devices. A. IO interface. B. Priority. C. Daisy
chain. D. Memory. ANSWER: A
238. How many address lines are needed to address a memory of
size 8 KB? A. 11 B. 12 C. 13 D. 14 ANSWER: B
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239. Which of the following is a storage location that holds
inputs and outputs for the ALU? A. Control unit. B. ALU. C. I/O
device. D. Register. ANSWER: C
240. ________ is a physical partition. A. Page. B. Segment. C.
DMA. D. Register. ANSWER: A
241. What coding format encodes a real number as a mantissa
multiplied by a power (exponent) of two? A. Binary. B. Excess
notation. C. Floating point. D. Two's complement. ANSWER: B
242. Which of the following does not result from floating point
math operations? A. Underflow. B. Overflow. C. Truncation. D. Two's
complement. ANSWER: C
243. What character coding method is used in IBM 360 compatible
mainframe computers? A. ASCII. B. BCD. C. EBCDIC. D. Unicode.
ANSWER: C
244. Which of the following data structures is a group of data
elements that usually describes a single entity or event? A. Array.
B. Index. C. linked list. D. record. ANSWER: A
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245. The table depicts device control codes from the ______
character coding standard. A. ASCII. B. BCD. C. EBCDIC. D. IEEE.
ANSWER: A
246. What is the result of adding the following two positive
binary bit strings? 101101.101 and + 10100.0010 A. 1000001.1110. B.
1000001.1010. C. 1000001.1000. D. 1000001.1100. ANSWER: D
247. What device performs the three functions depicted in the
boxes on the left side of the figure? A. Arithmetic Logic Unit. B.
NAND Gate C. Pointer Unit. D. Control Unit. ANSWER: A
248. The CPU cycle during which an instruction is moved from
primary storage to the control unit is ____ A. fetch. B. execution.
C. access. D. refresh. ANSWER: C
249. What type of processor does not directly implement
instructions that combine data movement and manipulation? A. CISC.
B. RISC. C. Microprocessor. D. PSW. ANSWER: D
250. When the control unit fetches an instruction from memory,
it stores it in the _______ A. instruction pointer. B. program
status word. C. opcode. D. instruction register. ANSWER: B
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Staff Name SANTHIYA.N.