COA Computer Organisation and Architecture

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 ISO9001:2008 CertifiedCRISL rated 'A' (TN) for MBA and MIB ProgrammesI BCA [2014-2017]Semester-IICore:Computer Organisation and Architecture - 206AMultiple Choice Questions.1. A Binary number systemhas ____________ digits.A. zero.B. one.C. two.D. three.ANSWER: C2. ______ computers are the binary number system.A. Analog.B. Super.C. Intra.D. Digital.ANSWER: D3. A ____ digit is called a bit.A. decimal.B. binary.C. octal.D. hexadecimal.ANSWER: B4. The ___________ of the computer consists of physical entity of the device.A. software.B. middleware.C. hardware.D. firmware.ANSWER: C5. Computer ______ consists of instructions and data that computer manipulates to performdata processing tasks.A. software.B. middleware.C. hardware.D. firmware.ANSWER: A6. A sequence of instructions for the computer is called____________.A. hardware.B. program.C. data.D. instruction.ANSWER: B7. ________ is concerned with the way the hardware components operate to formcomputer system.A. Computer organization.B. Computer design.C. Computer architecture.D. Computer implementation.ANSWER: A8. The manipulation of binary information is done by logic circuits called __________.A. blocks.B. gates.C. symbols.D. functions.ANSWER: B9. Each gate can be represented in tabular formby a __________.A. symbols.B. function.C. truth table.D. logic.ANSWER: C10. 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: B11. _________ algebra deals with binary variables and logic operations.A. Boolean.B. Numerical.C. Binary.D. Logic.ANSWER: A12. A Boolean function can be translated from______________ expression into a logic diagram.A. boolean.B. logical.C. relational.D. algebric.ANSWER: D13. The map simplification method is also known as ___________ map.A. karnaugh.B. algebric.C. basic.D. binary.ANSWER: A14. The condition when it does not matter if the function produces 0 or 1 for a given mintermis ________________.A. SOP.B. POS.C. NOR.D. don't care.ANSWER: D15. 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: C16. The addition of 2 binary digits is done by ___________ circuit.A. half adder.B. full adder.C. BCD adder.D. composite adder.ANSWER: A17. A _________ is a combinational circuit that forms sumof 3 input bits.A. half adder.B. full adder.C. BCD adder.D. composite adder.ANSWER: B18. The storage element employed in clocked sequential circuit is called ___________.A. memory.B. flipflop.C. circuit.D. subtractor.ANSWER: B19. Dynamic input in SR flip-flop is designated by __________ shaped symbol.A. arrowhead.B. circle.C. rectangle.D. triangle.ANSWER: A20. In flip-flop input R stands for __________.A. read.B. reset.C. reimburse.D. rectangle.ANSWER: B21. The _________ flip-flop is a slight modification of SR flip-flop.A. JK.B. T.C. edge triggered.D. D.ANSWER: D22. In T flip-flop T stands for ___________.A. technical.B. toggle.C. trigger.D. type edged.ANSWER: B23. Special input terminal for setting the flip-flop is called ______.A. clear.B. set.C. preset.D. reset.ANSWER: C24. A _____________ circuit is an interconnection of flip-flops and gates.A. combinational.B. arithmetic.C. shift.D. sequential.ANSWER: D25. The state table of sequential circuit consists of __________ sections.A. one.B. two.C. three.D. four.ANSWER: D26. 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: C27. The state of the flip flop after the occurrence of a clock pulse is called __________ stateA. high levelB. presentC. nextD. low levelANSWER: C28. Digital circuits are constructed with ______ circuits.A. arithmetic.B. logic.C. integrated.D. shift.ANSWER: C29. The multiplexer is also called ________ selector since it selects one of many data inputs.A. line.B. data.C. binary.D. octal.ANSWER: B30. A _______ is a digital circuit that performs the inverse operation of a decoder.A. multiplexer.B. adder.C. subtractor.D. encoder.ANSWER: D31. A ________ is a group of flip-flops.A. memory.B. circuit.C. register.D. bits.ANSWER: C32. A register is capable of storing __________ bit of information.A. one.B. two.C. three.D. four.ANSWER: A33. The _______ input in the register determines the action to be taken with each clock pulse.A. buffer.B. register.C. load.D. zero.ANSWER: C34. 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: A35. There are ________ basic arithmetic operations.A. one.B. two.C. three.D. four.ANSWER: D36. The arithmetic processor is simple if it has only fixed point ________ instruction.A. add.B. subtract.C. multiply.D. division.ANSWER: A37. The solution to any problemstated by a finite number of procedural steps is _________.A. procedure.B. algorithm.C. subprogram.D. specification.ANSWER: B38. During addition of 2 numbers signs of A and B are _________ compare the magnitude.A. same.B. different.C. large.D. small.ANSWER: B39. A decimal arithmetic unit is a ___________ function that performs decimal micro operations.A. analog.B. logical.C. digital.D. boolean.ANSWER: C40. A straight subtraction of 2 numbers requires a __________ circuit.A. BCD adder.B. subtractor.C. division.D. subtractorANSWER: B41. The means of entering information into computer is through a ___________.A. mouse.B. keyboard.C. printer.D. monitorANSWER: B42. The ___________ subsystemof a computer provides communication between central systemand outside environment.A. input/output.B. input.C. output.D. exit.ANSWER: A43. A _______________ interrupt is a systemthat establishes a priority over sources to determine which condition to service first.A. software.B. hardware.C. priority.D. device.ANSWER: C44. Convert the following decimal number to binary: 1998.A. 11111001110.B. 111111101110.C. 111100011110.D. 111000111000ANSWER: A45. The CPU responds to the interrupt signal by storing the ___________ address fromprogramcounter.A. stack.B. memory.C. return.D. I/O.ANSWER: C46. In a _______________ interrupt, the branch address is assigned to fixed location in memory.A. vector.B. non vector.C. pipeline.D. priority.ANSWER: B47. The K-Map is also called ________________ diagramA. vennB. boolean.C. vectorD. veitchANSWER: D48. Devices that provide backup storage are called ___________ memory.A. main.B. auxiliary.C. backup.D. device.ANSWER: B49. The memory unit that directly communicates with CPU is called __________ memory.A. main.B. auxiliary.C. device.D. backup.ANSWER: A50. The ____________ memory access time is less than the access time of the main memory.A. virtual.B. associative.C. cache.D. mapping.ANSWER: C51. Many OS enable the CPU to proceeds a number of independent programs concurrently called ____________A. multitasking.B. multiprogramming.C. multi processing.D. multiple functionsANSWER: B52. RAM stands for _________.A. randomaccess memory.B. randommemory.C. read only memory.D. read access memory.ANSWER: A53. Static RAM connects of flip-flops to store ______________ information's.A. octal.B. binary.C. decimal.D. hexadecimalANSWER: B54. RAM is _______________ its contents are destroyed when power is turned off.A. non volatile.B. permanent.C. volatile.D. initial.ANSWER: A55. Initial programis stored in ROM portion of main memory called _____________ loader.A. linking.B. volatile.C. non volatile.D. bootstrap.ANSWER: D56. 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: B57. A disk drive with removable disks is called _____________ disk.A. magnetic tape.B. magnetic.C. floppy.D. record.ANSWER: C58. A memory unit accessed by content is ___________ memory.A. virtual.B. cache.C. mapping.D. associative.ANSWER: D59. The transformation of date frommain memory to cache memory is called ____________ process.A. execution.B. mapping.C. unmapping.D. loading.ANSWER: B60. The basic component of arithmetic circuit is________.A. parallel subtractor.B. parallel adder.C. half adder.D. full adder.ANSWER: B61. 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 operationANSWER: A62. 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: A63. 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: B64. LIFO stands for _______________.A. last in flag out.B. last in first out.C. loop in first out.D. loop in flag outANSWER: B65. The storage devices that stores information in a manner that the itemstored last in first itemretrieved is__________.A. queue.B. stack.C. CPU.D. register.ANSWER: B66. The operation of deletion in stack is____________.A. PUSH.B. POP.C. FRONT.D. REAR.ANSWER: B67. SP stands for _____________.A. Storage Pointer.B. Seek Pointer.C. Stack Pointer.D. Synchronous PointerANSWER: C68. The expansion of RPN is ____________.A. Reverse Polish Notation.B. Review Polish Notation.C. Reverse Pointer Notation.D. Review Pointer Notation.ANSWER: A69. The notation A+B is ______________.A. prefix notation.B. postfix notation.C. infix notation.D. none of these.ANSWER: C70. The bits of the instruction are divided into groups called______________.A. formats.B. fields.C. bytes.D. address.ANSWER: B71. 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: D72. RISC stands for_____________.A. Reduced Instruction Set Computer.B. Reverse Instruction Set Computer.C. Reduced Implied Set Computer.D. Reverse Implied Set Computer.ANSWER: A73. 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: B74. The instruction that performs arithmetic, logic and shift operations are____________.A. data transfer instruction.B. data manipulation instruction.C. register transfer instruction.D. programcontrol instruction.ANSWER: B75. 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: A76. The instruction provides decision making capabilities are___________.A. data transfer instruction.B. data manipulation instruction.C. register transfer instruction.D. programcontrol instruction.ANSWER: D77. 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: B78. 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: A79. DR stands for_______________.A. Direct Register.B. Data Register.C. Division Register.D. Decrement RegisterANSWER: B80. The instructions that cause transfer of data fromone location to another without changing the binary information content are_______________.A. data transfer instruction.B. data manipulation instruction.C. register transfer instruction.D. programcontrol instruction.ANSWER: A81. The computer code for interchanging the information between terminals is___________.A. ASCII.B. BCD.C. EBCDIC.D. CDIE.ANSWER: A82. A byte consists of____________.A. one bit.B. four bits.C. eight bits.D. sixteen bits.ANSWER: C83. The notation AB+is____________.A. prefix notation.B. postfix notation.C. arithmetic notation.D. infix notation.ANSWER: B84. 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: C85. 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: C86. TOS represents______________.A. Top Of Simulator.B. Top Of Stack.C. Top Of Storage.D. Top Of System.ANSWER: B87. 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: A88. AR represents____________.A. Auto Register.B. Address Register.C. Auxiliary Register.D. Associate Register.ANSWER: B89. 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: B90. The instructions that performbinary operations on strings of bits stored in registers_______.A. logical instructions.B. shift instructions.C. arithmetic instructions.D. complement instructions.ANSWER: A91. The termthat provides simultaneous data processing tasks are____________.A. parallel processing.B. array processing.C. vector processing.D. distributed processing.ANSWER: A92. The ________ holds the number of words to be transferred to the memory.A. word count registerB. address register.C. control register.D. programregisterANSWER: A93. BCD represents_______.A. Binary Coded Decimal.B. Binary Coded Data.C. Binary Computational DecimalD. Binary Computational DataANSWER: A94. The command that causes the interface to respond by transferring data fromthe bus into one of its registers__________.A. data input command.B. data output command.C. data control command.D. data status command.ANSWER: B95. Binary information is represented in digital computers by physical quantities called______.A. signals.B. bits.C. volts.D. symbols.ANSWER: A96. The expansion of BCD is ________________.A. Binary Codiac Decimal.B. Binary Coded Decimal.C. Binary Coded Digit.D. Binary Codiac Digit.ANSWER: B97. The two variable K map consist of ________ boxes.A. 3B. 4C. 6D. 8ANSWER: B98. The base or radix of octal number systemis _______________A. 2B. 16C. 10D. 8ANSWER: D99. The base or radix of hexadecimal number systemis _____________A. 2B. 16C. 10D. 8ANSWER: B100. The flip flop used to synchronize the state change during a clock pulse transition is ___________A. JK flip flop.B. T flip flopC. edge triggered flip flop.D. RS flip flop.ANSWER: C101. 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: B102. The NOR gate is complement of ________A. AND gateB. OR gateC. NAND gateD. NOT gateANSWER: B103. The theoremwhich deals with NOR and NAND gates are ______A. demorgan's theoremB. baye's theoremC. boolean's theoremD. booth's theoremANSWER: A104. The ALS represents _____________A. Arithmetic Logic Shift Unit.B. Auto Logic Shift Unit.C. Arithmetic Logic Simple Unit.D. Auto Logic Shift Unit.ANSWER: A105. The programthat translates a high level language programinto binary is called __________A. translator.B. compiler.C. interpreter.D. simulator.ANSWER: B106. A set of common instruction that can be used in a programmany times is called a __________A. function.B. subroutine.C. method.D. structure.ANSWER: B107. 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: C108. The register that keeps track of the instructions in the programstored in memory is __________A. control registerB. programregisterC. status registerD. direct registerANSWER: B109. 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: A110. The part of a processor unit that executes arithmetic operations is _______A. array processor.B. arithmetic processor.C. vector processor.D. multiprocessor.ANSWER: B111. In addition algorithm, the signs of A and B are __________A. identical.B. different.C. dissimilar.D. asymmetryANSWER: A112. The communication between central systemand the outside environment is done by ____________A. input-output subsystem.B. control system.C. memory system.D. logic system.ANSWER: A113. In NAND gate, if both the inputs are 1,the output will be ________A. no outputB. 1C. 0D. both b & cANSWER: C114. The base or radix of decimal number systemis ____________A. 2B. 16C. 10D. 8ANSWER: C115. The access method of RAM is ___________ if bits are considered the unit of data access.A. randomB. parallelC. serialD. directANSWER: B116. Software programs permanently stored in a read only memory (ROM) are called _________A. softwareB. firmwareC. hardwareD. vaporwareANSWER: B117. 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: D118. 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: A119. A collection of 8 bits is called _________A. byteB. wordC. recordD. fieldANSWER: A120. 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: D121. ALU is _________A. Arithmetic Logic Unit.B. Array Logic Unit.C. Application Logic Unit.D. Array Lack Unit.ANSWER: A122. MSI stands for ________A. MediumScale Integrated Circuits.B. MediumSystemIntegrated Circuits.C. MediumScale Intelligent Circuit.D. MediumSystemIntelligent Circuit.ANSWER: A123. A micro programwritten as string of 0's and 1's is a ___________A. symbolic microinstructionB. binary microinstruction.C. symbolic microprogram.D. binary microprogram.ANSWER: D124. 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: B125. 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: B126. The base or radix of binary number systemis _________A. 2B. 16C. 10D. 8ANSWER: A127. Which of the following is associated with error detector?A. Odd parity bit.B. Even parity bit.C. Both (i) and (ii)D. ASCII CodeANSWER: C128. Binary circuit elements have _________A. one stable state.B. two stable state.C. three stable state.D. zero state.ANSWER: B129. Which statement is valid?A. 1KB =1024 bytesB. 1 MB =2048 bytesC. 1 Mb =1000 kilobytesD. 1 Kb =1000 bytesANSWER: A130. Instruction in computer languages consists of _________A. opcode.B. operand.C. both i and iiD. all zero'sANSWER: C131. The octal equivalent of 111010 is __________A. 81B. 72C. 71D. 82ANSWER: B132. A computer programthat converts an entire programinto machine language at one time is called a/an ______A. interpreter.B. simulator.C. compiler.D. commander.ANSWER: C133. Example for zero address instructions is __________A. push.B. load a.C. move r1,aD. store x.ANSWER: A134. CPU performs _______ operation.A. data transfer.B. logic operation.C. arithmetic operation.D. all the above.ANSWER: D135. 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: B136. 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 expressionC. The first memory location where a subroutine address is stored.D. a register in which flag bits are stored.ANSWER: A137. The decimal number 10 is represented in the Hexadecimal Number Systemas _________A. BB. CC. DD. AANSWER: D138. The decimal number 11 is represented in the hexadecimal number systemas ______A. BB. CC. DD. AANSWER: A139. The octal number 735 is represented in the decimal number systemas ________A. 478B. 477C. 487D. 774ANSWER: B140. The decimal number 250.5 is represented in the hexadecimal number systemasA. FA.BB. 8C.FC. FA.8D. AF.8ANSWER: C141. Ripple counters are sometimes called as ____________ counters.A. BCD.B. synchronous.C. asynchronous.D. None of these.ANSWER: C142. 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: D143. The decimal number 14 is represented in the hexadecimal number systemas _________A. BB. EC. DD. AANSWER: B144. The decimal number 16 is represented in the hexadecimal number systemas __________A. FB. CC. HD. AANSWER: C145. Excess-3 Codes are _______A. sequential.B. binary.C. BCD.D. weighted.ANSWER: A146. An Excess-3 code is obtained by adding _______ to a decimal number.A. 6B. 3C. 33D. 2ANSWER: B147. 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: A148. The position of 0 or 1 in a binary number indicates its ________ within the number.A. weight.B. position.C. place.D. order.ANSWER: A149. The binary equivalent of 43 is ______A. 100101.B. 101011.C. 101010.D. 101110.ANSWER: B150. The gate that gives 1 output if any one of the input is 1, is _______A. ANDB. NANDC. NOTD. ORANSWER: DStaff NameChristy Jemima D.