What is the function of an actuator in a computer system?

• It converts digital signals into analogue signals.

• It takes signals from a computer and converts them into some form of motion.

• It is used to access the network at various points.

• It is a set of rules which shows how to solve a problem.

Which of the following best describes an algorithm?

• A device that measures information that is continuously changing.

• A set of rules which shows how to solve a problem.

• A field type where any character is acceptable input.

• A transducer which takes signals from a computer.

What does the term 'absolute referencing' refer to in a spreadsheet?

• Fixes a value so that it cannot change.

• Fixes a cell reference so that when the formula is copied, this cell reference never changes.

• Data that is of the wrong type.

• A set of rules which shows how to solve a problem.

What is the purpose of anti-virus software?

• To detect and remove/isolates spyware.

• To detect and remove/isolates viruses.

• To enable a user to carry out a specific function on a computer.

• To provide additional information about HTML elements.

What is an 'access point' used for in wireless networks?

• To convert analogue signals into digital signals.

• To allow access to the network at various points using wireless technology.

• To produce solid 3D models using a modified inkjet printer.

• To fix a cell reference within a spreadsheet.

What does 'ADSL' stand for?

• Asymmetric Digital Subscriber Line

• Analogue Digital Subscriber Line

• Advanced Digital Subscriber Line

• Asymmetric Data Subscriber Line

What is the function of an analogue to digital converter (ADC)?

• It measures information that is continuously changing.

• It converts analogue signals into digital signals.

• It is a set of rules which shows how to solve a problem.

• It is a field type where any character is acceptable input.

What is the purpose of an automatic teller machine (ATM)?

• To access the network at various points.

• To withdraw cash from a bank account using a card and PIN.

• To convert analogue signals into digital signals.

• To produce solid 3D models using a modified inkjet printer.

What is the function within Microsoft Excel that adds together the contents of a number of cells?

• AVERAGE

• AutoSum

• back-end database

• back up

Which function within Microsoft Excel calculates the mean (average) of a list of numbers?

• AutoSum

• back-end database

• AVERAGE

• back up