Question # 1

________ key is used to cancel the current operation

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Alt

Caps Lock

Ese

Num lock

What is the octal equivalent of the binary system :10111101.?

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675₈

275₈

572₈

573₈

Analog signal is measured in

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Volts

Pulses

Hertz

WATTS

Project 802 defines standards for which layers of the OSI model?

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Application and Presentation layers

Physical an Date Link layers

Transport and Network layers

Network and Data Link layers

A device used for optical character recognition is

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wand reader

light pen

mouse

micr reader

The major disadvantage of magnetic tapes is.

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cost

unreliability of store data

slow data recording

data is to be accessed sequentially

The equipment attached to CPU which computer can access are called

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Hardware

input output devices

peripherals

computer components

Object program is

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A program written in machine language

A program to be translated into machine language

The translation of a high-level language into machine language

None of the above

Super computers are usually designed to process complex scientific applications and the computational speed of the system is most important. Each address in the CRAY-1 holds

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16 bits of information

32 bits of information

48 bit of information

64 bits of information

The most common protocol used in WAN is

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Ethernet

X.25

IEEE

ISO

An OR gate has 6 input. The number of input words in its truth table are.

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6

32

64

128

________ is a category software

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application software

system software

both a and b

none of these

The entire computer system is coordinated by.

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the ALU

the accumulator

the control unit

arithmetic operators

Which of the following function is referred as the complementary.?

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OR function

NOT function

NAND function

AND function

Data transmission speed of wire pair is

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9600 bps

9500 bps

3600 bps

3500 bps

A hybrid computer is the one having combined properties of.

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Super and microcomputers

Mini and microcomputers

Analog and digital computers

None of the above

The major operational problem of the early first generation computers was

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inaccurate results

poor reliability

delayed results

limited capabilities

The disk storage that use both magnet and laser beam

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hashing

magneto optical

CD-ROM

WORM

Logical security for on-line systems is achieved primarily by ________ and authorization codes

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MIS

Passwords

Tactical

None of the above

Is Secondary storage device

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CD-ROM

ROM

Cache

RAM

A color screen with the best resolution

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MICR

VGA

SVGA

LCD

First-generation computers were characterized by the use of the.

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microprocessor

vacuum tube

transistor

integrated circuit

Retaining data for future reference is called

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storing

sorting

memorizing

programming

Examples of pointing devices that are used for computer input are.

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joysticks

mice

trackballs

all of the above

An AND gate will function as OR if.

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all the inputs to the gates are "I"

all the inputs are "O"

a Not gate is added to it

all the inputs and outputs are complemented

A digital computer system consists of a central processing unit (CPU) interfaced with.

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input devices

auxilary storage

output devices

all of the above

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x . y

x + y

x . y

When the control unit directs the ALU to perform an operation on the data, the machine cycle is involved in its.

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first step

third step

second step

fourth step

Terminal is a.

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device to give power supply to computer

point at which data enter or leaves the computer

the last instruction in a program

any input/output device

______input device is not a pointing device

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Scanner

Pointing Stick

Digitizing Tablet

Touchpad

A driver is.

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hardware

a peripheral device

a card

software

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