Y7 - T2 - L4 - RP

What does it mean to be “online”?​

Answer explanation

What Does Online Mean?

Online, in a generic sense, refers to when an electronic device is on and connected to other devices, such as another computer, a network or a device such as a printer. More recently, the term online has come to mean connected to the Internet. In this case, either a person may be online when he or she is using the Internet, or the computer itself may be said to online when it has established an Internet connection.

Give 3 ways to protect yourself and your data when working online.​

Answer explanation

- Create strong passwords

- Don't share your password

- Don't overshare on social media

- Use free Wi-Fi with caution

- Check to see if the site is secure

- Watch out for links and attachments

The CPU is made up of two main components, the control unit, and the arithmetic and logic unit.

• True

• False

Answer explanation

The CPU is made up of three main components, the control unit, the immediate access store and the arithmetic and logic unit.

What is the Fetch Execute Cycle?

Answer explanation

The basic operation of a computer is called the 'fetch-execute' cycle.

The CPU is designed to understand a set of instructions - the instruction set. It fetches the instructions from the main memory and executes them. This is done repeatedly from when the computer is booted up to when it is shut down.

CPUs can only carry out one instruction at a time.

• True

• False

Answer explanation

It might seem like CPUs can perform many instructions simultaneously, since it is possible for you to do homework, read instant messages and listen to music at the same time.

However, the CPU is able to carry out instructions at such speed that it can seem like it is simultaneous.

The speed at which the CPU can carry out instructions is called the clock speed.

Complete this sentence… “A typical computer today would have a fetch-execute cycle running at [__________] cycles per second and would be measured in [___]”​

Cycles: Thousands, millions or billions​

Measurements: MHz, KHz or GHz​

​

Answer explanation

The speed at which the CPU can carry out instructions is called the clock speed. This is controlled by a clock. With every tick of the clock, the CPU fetches and executes one instruction. The clock speed is measured in cycles per second, and one cycle per second is known as 1 hertz. This means that a CPU with a clock speed of 2 gigahertz (GHz) can carry out two thousand million (or two billion) cycles per second.

A computer’s speed is heavily influenced by the CPU it uses. There are three main factors that affect how quickly a CPU can carry out instructions:

• cores

  cache

  size

• clock speed

  cores

  cache

• size

  clock speed

  cache

• brand

  cache

  cores

Answer explanation

CPU speed

A computer’s speed is heavily influenced by the CPU it uses. There are three main factors that affect how quickly a CPU can carry out instructions:

clock speed

cores

cache

The physical, tangible parts of a computer system is the...

• Keyboard

• Monitor

• Tower Casing

• Hardware

Answer explanation