2018 WAEC COMPUTER ANSWERS (OBJ & THEORY) VERIFIED

2018/2019 COMPUTER STUDIES(THEORY AND
OBJ)QUESTIONS & ANSWERS FROM EXAMSUCCESS247.COM
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1ai)
Computer system is a connection of electro-mechanical
devices that link together forming a system inorder to
perform automatic data processing (EDP)using software
1bii)
EDSAC
Electronic Delay storage Automatic Calculator
EDVAC
Electronic discrete Variable Automatic computer
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(2a)
Register is used to quickly accept, store, and transfer data
and instructions that are being used immediately by the
CPU.
(2b)
(i) Memory Address Register(MAR)
(ii) Accumulator Register(AC)
(iii) Memory data Register(MDR)
(2c)
(i) Register also provides a means to access counters for
profiling system performance.
(ii)Register is used for storing the results that are
produced by the system
(iii) MAR holds the memory location of data that needs to
be accessed.
(2d)
(i) Registers are temporary storage in the CPU that holds
the data the processor is currently working on, while
Main memory holds the program instructions and the
data the program requires.
(ii) Main memory can be addressed on a byte boundaries,
where Registers may not be able to access all the bytes in
a register.
(iii) Registers are the fastest memory in a computer while
Main memory is the slowest still-fast memory in a
computer.
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(4a)
Logic gate is the fundamental building block of digital
integrated circuits which performs basic logical functions.
(4b)
(i) Standard Logic gate: NAND, NOR, NOT
(ii) Alternative logic gate: XOR, XNOR
(4ci)
Draw the diagram
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(5ai)
Booting is the initialization of a computerized system.
(5aii)
Cold booting: when the computer is started after having
been switched off. While Warm booting: when the
operating system alone is restarted (without being
switched off) after a system crash or ‘freeze.’
(5b)
A peripheral is an ancillary device used to put
information into and get information out of the
computer.”
(5ci) Keyboard
(5cii) Printer
(5ciii) Flash
(5civ) Processor

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