WJEC Wave 1 Computer Science Topic 1 Complete

Which of the following is considered the "brain" of the computer, responsible for processing instructions?

• Central Processing Unit (CPU)

• Power Supply Unit (PSU)

• Graphics Processing Unit (GPU)

• Sound Card

Explain how increasing the number of cores in a CPU can affect its performance.

• It allows the CPU to process more tasks simultaneously, improving multitasking and overall speed.

• It increases the size of the computer's display.

• It reduces the amount of power the computer uses.

• It increases the storage capacity of the computer.

Why is the fetch-decode-execute cycle important in a CPU's operation?

• It is the process by which the CPU retrieves, interprets, and carries out instructions, enabling the computer to function.

• It is the process of cooling the CPU.

• It is the process of connecting to the internet.

• It is the process of displaying images on the screen.

What is the main function of the PSU (Power Supply Unit) in a computer system?

• Converts external electrical power into usable power for the components

• Handles graphical processing tasks

• Connects the computer to a network

• Regulates the temperature of key components

Which of the following is an example of an embedded system?

• Microwave

• Desktop computer

• Printer

• Monitor

Why are USB ports assigned letters and numbers?

• To indicate their type and generation

• To show their color

• To identify their manufacturer

• To display their speed

Which port allows for wired network connections and is typically used for stable and fast internet connectivity?

• Ethernet

• Audio Out

• DisplayPort

• USB

Which type of memory temporarily stores copies of data from main memory to speed up processing and is very fast and smaller than RAM?

• Cache

• Virtual Memory

• Magnetic

• Optical

How does virtual memory extend a computer’s RAM?

• By using part of the hard drive as additional memory

• By storing data in portable devices

• By providing access from devices with an internet connection

• By using flash memory technology

What is a key advantage of flash memory compared to other types of storage?

• It is non-volatile and durable against physical shocks

• It is the fastest type of memory

• It is used for backup networks

• It is only used for startup instructions