Computer Components Quiz

What is the main function of the Central Processing Unit (CPU)?

• To store data permanently

• To execute or process all the instructions and data in a computer

• To carry out all arithmetic and logical operations

• To store numerical values at any part of a given operation

Which component of the CPU is responsible for carrying out all arithmetic and logical operations?

• Memory Address Register (MAR)

• Arithmetic & Logic Unit (ALU)

• Accumulator (ACC)

• Control unit

What does the Memory Address Register (MAR) store?

• The address of the memory location currently being read from or written to

• The current instruction being decoded and executed

• Data that has just been read from memory or data that is about to be written to memory

• The address where the next instruction to be read can be found

What is the purpose of the System clock in a computer?

• To store data permanently

• To produce timing signals on the control bus to ensure synchronization takes place

• To hold all data and programs needed to be accessed by the control unit

• To store frequently used data/instructions by the CPU

What is the function of the Control unit in a CPU?

• To store numerical values at any part of a given operation

• To ensure synchronization of data flow and programs throughout the computer

• To store the address of the memory location currently being read from or written to

• To produce timing signals on the control bus

What is the purpose of the Basic Input/Output System (BIOS)?

• To store data permanently

• To perform the initialization of a computer system during the boot-up process

• To hold frequently used data/instructions by the CPU

• To store the address where the next instruction to be read can be found

What does the term "overclocking" refer to in computing?

• Changing the clock speed of a system clock to a value higher than the factory/recommended setting

• A cycle in which instructions and data are fetched from memory, decoded and finally executed

• A CPU containing two cores

• A CPU containing four cores

What is an Embedded system?

• A combination of hardware and software designed to carry out a specific set of functions

• A series of dark and light lines of varying thickness used to represent data

• A field that uniquely identifies a record in a file

• A complete set of machine code instructions used by a particular microprocessor

What does a Quick Response (QR) code represent?

• A matrix of dark and light squares that represent data

• A type of barcode that represents product prices

• A series of numbers that represent a phone number

• A type of image that represents a photograph

What is the function of a DAC (Digital to Analogue Converter)?

• Converts digital data into electric currents

• Converts analogue data into digital data

• Converts text into speech

• Converts images into text