JAMB Computer Science Past Questions & Answers - Page 7

31.

What is the shortcut for performing warm booting ?

A.

by pressing the Ctrl + Alt keys simultaneouslyy pressing the Ctrl + Alt keys simultaneously

B.

by pressing the Ctrl + Alt + F1 keys simultaneously

C.

by pressing the Ctrl + Del keys simultaneously

D.

by pressing the Ctrl + Alt + Del keys simultaneously

Correct answer is D

Warm booting refers to the process of restarting a computer system which is already on. This can be done by pressing the Ctrl + Alt + Del keys simultaneously. This is a common shortcut for warm booting in many operating systems

32.

An action performed in the GUI operating systems to hide a window but keep the program running in the background is ?

A.

hide

B.

multitasking

C.

minimize

D.

maximize

Correct answer is C

Minimize is an action performed in the GUI operating systems to hide a window but keep the program running in the background

33.

The first computer made available for commercial use was

A.

UNIVAC

B.

EDSAC

C.

Mark-1

D.

ENIAC

Correct answer is A

On June 14, 1951, the U.S. Census bureau dedicates UNIVAC(Universal Automatic Computer), the first commercially produced electronic digital computer the US

34.

A device that sends and receives printed pages or images over telephone lines by digitizing the material with an internal optical scanner and transmitting the information as electronic signals is a

A.

ATM

B.

scanner

C.

GSM

D.

fax machine

Correct answer is D

Fax machine is a device that sends and receives printed pages or images over telephone lines by digitizing the material with an internal optical scanner and transmitting the information as electronic signals

35.

The last cycle of data processing where data and information are preserved for future is called

A.

processing

B.

recording

C.

storage

D.

output

Correct answer is C

The last cycle of data processing where data and information are preserved for future use is called 'storage'. This is the phase where data or information is saved either temporarily or permanently for future use. The 'output' is the result of data processing but not necessarily preserved for future use. 'Processing' is the action of manipulating data. 'Record' is a piece of stored information