2018/2019 WAEC Computer studies Obj & Theory Questions and Answers




COMPUTER STUDIES OBJECTIVE ANSWER:
1-10: AAAAACBACD
11-20: ACBDCDCAAB
21-30: DAAAACCDDC
31-40: BDBAADCCCA
41:50:  DAAABDBACD

COMPUTER STUDIES THEORY :
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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

1aii)
Major Component of computer
i)Central processing unit(CPU)
ii)Input unit
iii)Output unit
iv)storage unit

1aiii)
i)Collection
ii)conversion
iii)Manipulation
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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.

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

Typinq……

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