Question 106:

• WAEC 2021

The following actions are the effects of virus infection in a system except

A. Deletion of files
B. Slow operation
C. Hard disk failure
D. Display of unwanted messages

Question 107:

• WAEC 2021

(a) What are "Reports" in a database system?
(b) List four (4) ways in which Reports can be viewed in database management system.
(c) Outline the steps to prints a Report in MS Access.

Question 108:

• WAEC 2021

Perform the following conversions in the stated number bases;
(a) AB1\(_{16}\) to Octal system
(b) 1110111.101\(_2\) to Denary system
(c) 507\(_2\) to Binary system.

Question 109:

• WAEC 2021

(a)(i) What is Universal Serial Bus (USB)?
(ii) State two benefits of using USB connection between a computer and another device.
(b) In Table 1, three storage devices are described, Use it to answer questions 3(b)(i) and 3(b)(ii).
(i) In column 2, name the storage device being described in column 1.
(ii) Show the category of storage device being described in column 1 by ticking in any of the column 3, 4 or 5
Category of Storage Device

SN	1	2	3	4	5
	Description of Storage Device	Name of Storage Device
			Primary	Secondary	Offline
1	Magnetic storage medium which is composed of a thin flexible disk sealed in a square plastic carrier.
2	Optical media - which uses one spiral track.Red lasers are used to read and write data on the media surface and it makes use of dual-layering technology to increase the storage capacity to over 1 GB.
3	Non-volatile memory chip which contents cannot be altered. It is often used to store the start-up routines in a computer (e.g the BIOS).

Question 110:

• WAEC 2021

(a)(i) Define computer graphics.
(ii) List two applications of computer graphics in advertising.
(b) Give one use of the following computer graphics application tools;
(i) Interactive Fill Tool (ii) Texture Fill Tool (iii) Envelops Tool (iv) Extrude Tool
(c) Name one Fill Tool in computer graphic application which is needed to (i) create a background that is faded from light blue to white (ii) fill an object with two colours that blend from one to another.