Correct Answer: C. EDVAC

Correct Answer: D. both A and B

Correct Answer: D. Mathematical intensive scientific applications

Correct Answer: B) Output

Explanation

Computer speakers or headphones are devices that allow us to hear sounds from the computer. They play the sounds that are generated by the computer. Therefore, they are devices that output sound.

When we talk about input, we are referring to devices that send data or commands to the computer, such as a keyboard, a mouse, or a microphone. Software refers to the programs or applications that are installed on the computer and that allow us to perform different tasks. Processing refers to the actions that the computer performs to process the data and generate the output. Storage refers to the devices that allow us to save data on the computer, such as hard drives or USB drives.

In conclusion, computer speakers or headphones are output devices as they allow us to hear sounds from the computer. Therefore, the correct option is B. Output.

Correct Answer: C. Malware.

Correct Answer: A. waec.org.ng

Correct Answer: D. webcam

Correct Answer: A. configure firewall.

Explanation

a)(i) Storage Device: It is a piece of computer equipment/device/hardware/peripheral which can hold or store data/information. It can also be used to transfer data.

OR

Storage device can either be external/internal device used to hold/store data/information, for example, magnetic disk, diskette, flash drive, hard drive. DVD and VCD.

OR

Storage device is a digital medium/piece of computer equipment/device/hardware capable of storing/holding data/information either temporarily or permanently.

(i) Virtual Memory: This is the type of memory which allows a programmer to make a memory device behave as itf it has unlimited storage capacity. This supposed 'extra' memory is stored on secondary storage.

OR

Virtual memory is a technique by which additional memory is created on hard disc to compliment the activity of computer real memory.

OR

It is temporary.storage used by a computer to run programs that need more memory than it has.

OR

It is a memory management technique that provides an idealized abstraction of the storage resources that are actually available.

OR

It is a given machine which creates the illusion to users of a very large memory.

OR

It is a memory management capability of an operating system that uses hardware and software to allow a computer to compensate for physical memory shortages by temporarily transferring data from random access memory (RAM) to dick storage.

(b)(i) Calculating Number of Bits Held by Each Device: 2KB (ii) Calculation of Total Capacity:

1 Kilobyte = 1024 bytes

1 byte = 8 bits

2 kilobytes = 2 x 1024 x 8

→ 16384 bits

2MB

1 Megabyte = 1024 kilobytes

1 kilobyte = 1024 bytes

2 kilobytes = 2 x 1024 x 8

1 byte = 8 bits

Therefore, 2MB = 2 x 1024 x 1024 x 8 = 16777216 bits

To add 2MB and 2KB together,

2Mb = 2 x 1024 x 1024 bytes

= 2097152 bytes

2KB = 2 x 1024 bytes

= 2048 bytes

Total in bytes = 2097152+ 2048 bytes

= 2,099,200 bytes

Correct Answer: B. I, I, IV and Il