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MCQs — Computer Systems

Practice questions for Computer Science.

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Question 161

Which type of memory is located inside the CPU itself?

A. Hard disk

B. DVD

C. Registers

D. USB flash drive

Question 162

Which of these memories is the fastest?

A. RAM

B. Hard disk

C. Optical disc

D. Registers

Question 163

The ALU is about to add two numbers. Where are the numbers usually held during the operation?

A. In registers

B. On the monitor

C. On the keyboard

D. On the DVD

Question 164

What does it mean when memory is volatile?

A. It keeps its data when power is off

B. It loses its contents when power is turned off

C. It can never be read

D. It is used only in printers

Question 165

Which of the following keeps its data even when the power is switched off?

A. RAM

B. Cache

C. Solid-state drive (SSD)

D. Registers

Question 166

A student is typing an essay and has not saved it. The power suddenly fails and the text is lost. Which memory was holding it?

A. ROM

B. Hard disk

C. DVD

D. RAM

Question 167

Which classification is correct?

A. RAM – volatile, ROM – non-volatile

B. RAM – non-volatile, ROM – volatile

C. Hard disk – volatile, cache – non-volatile

D. Registers – non-volatile, SSD – volatile

Question 168

In general, as memory becomes faster, it also becomes:

A. Cheaper per byte and larger in capacity

B. More expensive per byte and smaller in capacity

C. Unable to store data

D. Slower to access

Question 169

Why are computers not built with only registers as memory?

A. Registers cannot hold data

B. Registers are too slow

C. Registers are very expensive and can only be made in very small amounts

D. Registers need no electricity

Question 170

A school wants to store years of video recordings at a low cost. Which choice is most suitable?

A. Cache memory

B. Registers

C. ROM chips

D. Large-capacity hard disks

Question 171

A designer wants a computer that is fast but still affordable. Which memory design makes the best balance?

A. A small cache, moderate RAM and a large disk used together

B. Using only very large registers

C. Using only a hard disk for everything

D. Using only cache for all storage

Question 172

Which list shows memory units in increasing order of size?

A. KB, Byte, MB, TB, GB

B. Byte, KB, MB, GB, TB

C. MB, KB, Byte, GB, TB

D. TB, GB, KB, MB, Byte

Question 173

1 kilobyte (KB) is equal to:

A. 1024 bits

B. 8 bytes

C. 1024 bytes

D. 1000 megabytes

Question 174

A text file is 2 KB in size. How many bytes does it contain?

A. 2000

B. 1024

C. 4096

D. 2048

Question 175

How many kilobytes are there in 3 MB?

A. 3072

B. 3000

C. 1024

D. 4096

Question 176

A memory of 4096 MB is equal to how many gigabytes?

A. 40

B. 4

C. 1

D. 8

Question 177

A flash drive has 8 GB of free space. How many video files of 512 MB each can it hold?

A. 8

B. 32

C. 16

D. 4

Question 178

In computer architecture, a 'word' is:

A. A word typed in a document

B. The name of a program

C. A type of printer

D. A group of bits that the CPU processes as one unit

Question 179

Word size is usually measured in:

A. Bits

B. Pixels

C. Watts

D. Pages

Question 180

A CPU has a word size of 32 bits. How many bytes does one word contain?

A. 2

B. 4

C. 8

D. 16

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