AQA Paper 2 Revision

What is the simplest numbering system used to represent data and instructions in a computer?

• Decimal

• Binary

• Hexadecimal

• Octal

How many bits are there in a byte?

• 32

• 4

• 8

• 16

What does one hexadecimal digit equal in binary digits?

• Two

• Eight

• Four

• Sixteen

What is the effect of a left binary shift on a number?

• It multiplies the number by four

• It multiplies the number by two

• It has no effect on the number

• It divides the number by two

Which character set allocates 7 bits per character?

• ISO-8859-1

• UTF-8

• ASCII

• Unicode

What is the primary purpose of compression?

• To enhance the color depth of images

• To increase the speed of the CPU

• To reduce file size

• To improve the quality of files

Which type of compression deletes part of the file permanently?

• Lossless

• Lossy

• Huffman coding

• Run-length encoding

What does a NOT gate do?

• Ands two inputs

• Exclusively ors two inputs

• Flips the input

• Combines two inputs

Which of the following is a high-level programming language?

• Machine code

• Python

• Binary

• Assembly

What is the main job of the operating system?

• To perform mathematical calculations

• To encrypt data

• To manage the hardware and other programs

• To compress files