A-level Intro CPU

Which of the following best describes hardware in a computer system?

• Data that is processed by the CPU.

• Physical components that can be touched.

• Instructions stored in RAM.

• Programs that instruct the computer to perform tasks.

Answer explanation

Hardware refers to the physical components of a computer system, such as the CPU, RAM, and hard drives, which can be touched. This distinguishes it from software, which includes data and instructions.

Which of the following is an example of a peripheral device?

• A web browser

• A keyboard

• A software application

• The operating system

Answer explanation

A keyboard is a peripheral device that allows users to input data into a computer. In contrast, a web browser, software application, and operating system are software components, not hardware peripherals.

Which statement about software is correct?

• Software cannot be updated once installed.

• Software is the set of instructions that makes hardware functional.

• Software is only used for gaming applications.

• Software consists of physical components.

Answer explanation

The correct statement is that software is the set of instructions that makes hardware functional. This highlights the essential role of software in enabling hardware to perform tasks, unlike the other options which are incorrect.

How does data enter a computer system?

• By connecting to a network.

• Through output devices like monitors.

• Via storage devices like hard drives.

• Using input devices like keyboards and mice.

Answer explanation

Data enters a computer system primarily through input devices like keyboards and mice, which allow users to provide commands and information. Other options, like storage devices, are for data storage, not direct input.

What is the main limitation of the CPU regarding storage media?

• It requires constant power to function.

• It cannot directly work with programs on storage media.

• It can only store data temporarily.

• It can only process data from external devices.

Answer explanation

The main limitation of the CPU is that it cannot directly work with programs on storage media. It requires data to be loaded into RAM before processing, which means it relies on intermediary storage for program execution.

What is the primary function of the CPU in a computer system?

• To store data permanently.

• To process data according to instructions.

• To display output on the screen.

• To input data from external devices.

Answer explanation

The primary function of the CPU is to process data according to instructions. It executes commands from programs, making it the central component for computation, unlike the other options which pertain to storage, display, or input.

What role does RAM play in relation to the CPU?

• It allows the CPU to access programs quickly.

• It permanently stores all data.

• It connects the CPU to the internet.

• It serves as an input device.

Answer explanation

RAM (Random Access Memory) allows the CPU to access programs quickly by providing fast read and write access to data that the CPU needs in real-time, enhancing overall system performance.

What does multi-tasking allow a CPU to do?

• Store more data in RAM.

• Increase the physical size of the CPU.

• Switch between programs quickly to appear as if multiple are running.

• Run multiple programs simultaneously without any delay.

Answer explanation

Multi-tasking allows a CPU to switch between programs quickly, creating the illusion that multiple programs are running simultaneously. This enhances user experience by making applications responsive.