Question # 1

Pick out the correct definition of buffer.

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Buffer is a hardware device that stores data outside the CPU

Buffer is that portion of the CPU memory which stores program instructions

Buffer is a temporary storage between the CPU memory and a peripheral device

Buffer is a device to convert input data into a computer readable form

The central processing Unit (CPU) comprises of.

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memory, VDU , and printer

input device , output device and memory

store , arithmetic and logic unit and control unit

software, hardware and power supply unit

The heart of a digital computer is.

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control unit

memory unit

logic unit

visual display unit

The operation of arithmetic logic unit (ALU) is directed by.

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the ALU itself

program

control unit

memory unit

The following register keeps track of the program during execution.

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Address register

Program counter

Data register

Accumulator

On a linear bus topology cabling can be extended by using following device

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Network Adapter Card

Barrel Connector

Terminator

Modem Card

At the beginning of the instruction cycle, the contents of the Instruction Register specify.

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Operand for the instruction being executed

Instruction itself

Operand for the instruction to be executed next

None of above

How many pairs of computers can simultaneously communicate on Ethernet LAN

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1

3

Multiple

4

Which of the following is an example of volatile memory.

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ROM

RAM

PROM

Hard disk

The term word in computer terminology refers to.

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bits formed into groups

coded instructions

memory size

language used

SNA is an example of

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De Jure Protocol

De Facto Protocol

Network organization

None

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

IEEE 802.3 is

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Device Name

Protocol

Topology

None

The most common protocol used in WAN is

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Ethernet

X.25

IEEE

ISO

Computer operations are synchronized by.

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the CPU clock

megabytes

the binary system

E-time

Ethernet bus topologies used following Ethernet cabling

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Thin Net

Thick Net

Bold Net

a , b

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