Select the correct option which shows the names of 2 CPU registers

• MAR - (Memory Address Register) and RAM
• MAR - (Memory Address Register) and CU (Control Unit)
• MDR - (Memory Data Register) and ALU (Arithmetic and Logic Unit)
• PC (Program Counter) and Cache
• PC (Program Counter) and Accumulator

Select the correct option which shows the names of the 4 CPU registers.

• Program Counter , Accumulator , Memory Address Register (MAR) - Memory Data Register (MDR)
• Program Counter , Accumulator, Memory Data Register (MDR) ,Control Unit.
• MAR , RAM ,Memory Data Register (MDR), ALU (Arithmetic and Logic Unit)
• MDR , Accumulator,Memory Address Register (MAR) , RAM
• MDR, MAR , RAM, Control Unit

What is the purpose of using an operating system?

• Operating systems manage computer hardware, users and the resources used by software
• To create graphics and designs for video games.
• To improve the performance of a Computer
• To allow more data to be stored
• To manage Security of a computer - Passwords, Pins, Fingerprint ID

Select which is not a function of an operating system

• User Interface
• Memory Management
• Multitasking
• User Management
• Increasing the number of FDE cycles.

Select the correct definition for a Pixel

• The smallest unit of a digital image that can be displayed and represented on a digital display device
• The number of bits that are used to represent each pixel
• A measurement of computer processing speed.
• The total number Colours that can be stored in an image

Select the correct definition for colour depth

• The smallest unit of a digital image that can be displayed and represented on a digital display device
• The number of bits that are used to represent each pixel
• A measurement of computer processing speed.
• The total number Colours that can be stored in an image

What is the formula for calculating the size of an image file?

• Total number of pixels x Colour Depth
• Height of pixels x Colour Depth
• Width of pixels x Colour Depth
• Height of pixels x Width of Pixels

Define the term "character set"

• Is a set of defined list of characters recognised by the computer.
• A collection of symbols used in a programming language.
• A specific layout of keys on a keyboard.
• Describes only the letters and numbers that can be stored in a computer

What is ASCII and how many characters can it represent?

• ASCII is a character encoding standard, capable of representing 128 English characters.
• ASCII is a programming language that can represent 1000 characters
• ASCII is a type of computer hardware that can process 256 different commands.
• ASCII is a database system that stores over 500 different types of data entries.

What is UNICODE and how many characters can it represent?

• Unicode is a character encoding standard, capable of representing 128 English characters
• Unicode is a character encoding standard, capable of representing 256 English characters
• Unicode: its a system for encoding characters using up-to 32 bits (4 Bytes) Currently 163,000 characters have been encoded.
• Unicode is a character encoding standard, capable of representing European Languages only.