WJEC Digi Tech - 1.2 - 7: Software

What is software?

• A) A physical component of a computer

• B) A set of instructions that hardware executes

• C) A malfunction in computer systems

• D) A type of computer virus

Which of the following is NOT an example of application software?

• A) Microsoft Word

• B) Adobe Photoshop

• C) Audacity

• D) A computer's operating system

What is bespoke software?

• A) Software that is available for anyone to download

• B) Pre-packaged software with limited functionality

• C) Software designed to meet specific needs of an individual or organization

• D) Outdated software that is no longer in use

What is a feedback system in process control?

• A) A system that only takes input and produces output without any feedback

• B) A system where the output is measured and becomes part of the input

• C) A system that has no input or output signals

• D) A system that relies solely on manual control

What distinguishes an open loop system from a feedback system?

• A) An open loop system measures its output to adjust its input.

• B) An open loop system takes no account of what is happening to its output.

• C) A feedback system has no input signals.

• D) A feedback system only looks at its input signal to decide what to do.

Place the Open Loop System in order

• Process

• Input

• Output

Place the Feedback Loop in order (remember, it would get to the end then go back to the beginning)

• Process

• Feedback

• Input

• Output

Open loop system:

 

This only looks at its ​ (a)   in order to ​ (b)   what to do. It takes ​ (c)   at all of what is happening to its ​ (d)   .

• input signal
• decide
• no account
• output

Feedback system:

The ​ (a)   is ​ (b)   and some of it is ​ (c)   to become part of the ​ (d)  

• output
• measured
• 'fed back'
• input.