CHAPTER 2 : COMPUTER SYSTEMS MCQ 1. Input is t he ___ _______ that you e nter into the c omput er. A. data B. program C. software D. info rmat io n Answer : A 2. Processors cont ain ___. A. a chip a nd an adapte r B. a moth erboard and a por t C. a cont rounit and a n ari thmet ic o gic u nit D. adapte r card s Answer : C !. CD" #$% a nd D&D"#$% are e'amp es of _ _. A. #A% B. #$% C. opti ca dis (s D. ma gne ti c dis(s Answer : C ). ___ are c onnecte d to the h ard dis(s and the D&D*CD"# $% dri +e. A. ,- B ports B. IDca b es C. 'pansion sots D. Adapte r cards Answer : B /. 0or mat ti ng a dis ( __ ____ ____ _A. erases adata on the dis(B. di+ides the hard dis( into se+erapartitions C. ma(es a bac(up copy of the data on the dis(D. mo+es the data around on the dis( to sa+e space Answer : A . e u suay format a hard dis( using fie sy stems. A. 0A3 B. 43 C. ,0- D. 530- Answer : D
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1. Processor is an eectronic component on a computer?s motherboard that interprets and
carries out the basic instructions that operate the computer.
=a> 5ame the two components of a processor.
#ontrol $nit (#$) and Arithmetic and %ogic $nit (A%$)
=b> Based on your gi+en answer in =a>7 state the functions of each components.
ALU
"he arithmeticlogic unit (A%$) contains the electronic circuitry that e&ecutes
all arithmetic and logical operations'
"he arithmeticlogic unit can perform four kinds of arithmetic operations or
mathematical calculations addition subtraction multiplication and division'
"he arithmeticlogic unit also performs logical operations' A logical
operation is usually a comparison' "he unit can compare numbers letters or
special characters'
CU
"he control unit contains circuitry that uses electrical signals to direct theentire computer system to carry out or e&ecute stored program instructions'
"he control unit does not e&ecute program instructions; rather it directs
other parts of the system to do so' "he control unit must communicate withboth the arithmeticlogic unit and memory'
2. %ost computers are digita and recognie ony two discrete states: off => and on =1>.
3o represent these states7 computer use the binary system.
Based on the abo+e statement7 answer the foowing <uestions.
=a> Define bit and byte.
A bit is the smallest unit of data a computer can process' *yte is formed when + bits are grouped together as a unit' (Additional ,nfo ,t
provides enough different combinations of -s and .s to represent /01 individual
characters')
=b> -tate two of the coding scheme used in data representation.
"he series of bits represent by using coding schemes such as AS#,, 2*#3,#and $nicode'
RAM is usually volatile' ,ts contents are lost once the power is shut off'
RAM can be erased or written over at will by the computer software'
=c> 'pain two differences of E and @.
RAM : Stands for Random Access Memory' Also called main memory or
primary storage; "he more RAM a computer has the faster it responds; 3ata in memory can be accessed randomly no matterwhere it is in an easy and speedy manner' RAM is usually volatile this
means that its contents are lost once the power is shut off' RAM can be
erased or written over at will by the computer software'
ROM : Read6only memory (R7M) contains programs and data that are
permanently recorded into this type of memory at the factory; they can be
read and used but they cannot be changed by the user' !or e&le a personal computer probably has a program for calculating s4uare roots in
R7M' R7M is nonvolatile 66 its contents do not disappear when the power is