Question # 1

Base 8 is often used in computing because.

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there are 8 bit in a byte

calculations become easier by using base 8

electronic circuits can be made econmically

it can represent long strings of binary 1's an 0's in a more compact form

Data is transmitted character by character in

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Synchronous mode

Asynchronous mode

Remote communication

Satellite mode

Which of the following is increasing as computer technology progresses?

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speed

efficiency

hardware reliability

all of these are inceasing

The device drive is an example of :

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Application software

System software

Freeware

Shareware

A computer can be defined as an electronic device that can: (choose the most precise definition).

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carry out logical functions

carry out arithmetical operations

accept and process data using a set of stored instructions

present information on a VDU

The central processing unit comprises of

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memory ,VDU and printers

input devices output devices and memory

software arithmetic and logic unit,and control unit

software,hardware,and power supply unit

Pick out the wrong statement about computers.

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it is a logical machine

it can access any piece of information that it has in store

it is devoid of emotion, has no feelings or instincts

it approaches its information is unrestricted manner

The unit that transforms data into information is the.

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CPU

ROM

DVD

OCR

An on-screen picture

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page

NOC

icon

spool

Data and instructions are put into primary storage by.

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memory

the control unit

secondary storage

the ALU

A device that inputs data by scanning letters and number is a

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keyboard

wand reader

mouse

diskette

A collection of software that controls the overall operation of a computer is called

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application software

programming language

system software

operating software

If a processor does not have direct and unassisted access to data items, these items are said to be.

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off line

Time Shared

on line

None of these

According to absorption law x. (x+y) =

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x

y

1+x

1+y

Who developed the first automatic electronic digital computer prototype between 1935 and 1942.

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John Atanasoff

J. Presper Eckert

William Shockley

Thomas J.Watson

Most of the errors in computer system could be attributed due to

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virus

programming errors

hardware problems

data entry errors

Records stored on a Direct Access storage device.

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must be read in a specific order

must be read in groups

must be read directly

must be read sequentially or directly

If A and B are two 1-bit numbers, what logic gates will be required to test for A=B?

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NOR gate

EXCLUSIVE OR gate

EXCLUSIVE NOT gate

OR gate

___________coding scheme is used by IBM

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Unicode

ASCII

EBCDIC

BCD

The digits used for hexadecimal number system are.

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A through Z

1 through 16

0 through 15

0 through 9 and A through F

The process of transferring data from one location to another is called:

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Data processing

Data Computing

Data communication

Data sequencing

Abother word for printer

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monochrome

microfiche `

pixel

cursos

Pick up wrong logical expression

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The transfer if encoded information from one location to another by a communication channel is called

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data processing

data distribution

data communication

data encryption

SNA is an example of

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De Jure Protocol

De Facto Protocol

Network organization

None

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x + y

A computer can not do anything without

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programme

input device

output device

VDU

The equipment attached to CPU which computer can access are called

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Hardware

input output devices

peripherals

computer components

Arrow keys are also known as :

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Function keys

Cursor control keys

Toggle keys

Special keys

Most mainframe computers are basically.

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4 bit machines

8 bit machines

32 bit machines

16 bit machines

A storage medium which cannot support both direct-access and sequential-access application is.

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magnetic drum

hard disk

magnetic tape

floppy disk

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