AQA Computer Systems revision

The central processing unit (CPU) is the _____ of the computer that carries out

instructions to process data.

• Memory

• Heart

• Brain

• Eyes

Answer explanation

The correct choice is 'Brain' as the central processing unit (CPU) is often referred to as the brain of the computer, responsible for carrying out instructions to process data.

What does ALU stand for?

• arithmetic local unit

• arithmetic logic unit

• alternate logic uniform

• alternate logic unit

Answer explanation

ALU stands for arithmetic logic unit, which is responsible for performing arithmetic and logical operations in a computer's CPU.

What does CU stand for?

• Close Up

• Closed Unit

• Control Up

• Control Unit

Answer explanation

CU stands for Control Unit, which is the correct choice among the options provided.

The von Neumann architecture of a system can be described as

• Storing data and programs in the same memory.

• Storing data and programs in the different memory.

• Processing data and programs in the same cpu.

• Processing data and programs in the different cpu's.

Answer explanation

The von Neumann architecture involves storing data and programs in the same memory, allowing for efficient processing and execution within the same system.

The ________ manages the execution of instructions by making sure that all

the components perform their task at the correct time.

• Clock

• ALU

• Control Unit

• CPU

Answer explanation

The Control Unit manages the execution of instructions by ensuring all components perform tasks at the correct time.

_______ are small areas of memory in the CPU that hold data and memory

addresses used during the fetch-execute cycle.

• RAM

• Cache

• Registers

• ROM

Answer explanation

Registers are small areas of memory in the CPU that hold data and memory addresses used during the fetch-execute cycle.

Match the following

• synchronises tasks

• Control unit

• manages the execution of instructions

• Fetch

• retrieve next instruction from memory

• Decode

• translate, instruction to work out what it is

• Execute

• carry out, the instruction

• Clock

The physical stuff that makes up the computer is called...

• Software

• Hardware

Answer explanation

The physical stuff that makes up the computer is referred to as hardware, which includes components like the processor, memory, and storage devices.

Programs that a computer system runs is known as....

• Software

• Hardware

Answer explanation

Programs that a computer system runs is known as Software.

Application software is...

• help the user run specific tasks like word processors, web browser, email, clients, games, etc

• run tasks like the operating systems, utilities, etc

• help the user run things down

• run tasks like the doing my homework, revision, etc

Answer explanation

Application software is designed to help the user run specific tasks like word processors, web browsers, email clients, games, etc.