WAEC Computer Science Past Questions & Answers - Page 72

356.

Evaluate 10011\(_2\) - 1111\(_2\) 

A.

00010\(_2\)

B.

00100\(_2\)

C.

01000\(_2\)

D.

10000\(_2\)

Correct answer is B

No explanation has been provided for this answer.

357.

A single character in an EBCDIC encoding system can be represented using 

A.

4 bits

B.

6 bits

C.

8 bits

D.

16 bits

Correct answer is C

No explanation has been provided for this answer.

358.

The part of the computer system shown in Figure 11 is used to 

A.

perform memory test

B.

power on or off the computer

C.

print a document from the computer

D.

reset the computer to factory setting

Correct answer is B

No explanation has been provided for this answer.

359.

Changing the default settings or appearance of the Taskbar in windows by a user is known as 

A.

customization

B.

designing

C.

generalization

D.

globalization

Correct answer is A

No explanation has been provided for this answer.

360.

The windows shortcut key for closing an active application is

A.

Alt+F4

B.

Ctrl+Alt+Del

C.

Ctrl+Esc.

D.

Ctrl+Shift+Del

Correct answer is A

No explanation has been provided for this answer.