AQA GCSE Computer Science: Computer Systems (Paper 2)

What is 53 in binary?

• 01100101

• 00110101

• 00011011

• 01010101

Convert A7 from hexadecimal to denary

• 176

• 26

• 122

• 167

What is 0101 + 0110 ?

• 1011

• 0111

• 1101

• 1110

One sample of a sound wave is a binary number that represents ...

• ... the frequency of the wave.

• ... the amplitude of the wave.

• ... a short sound for data compression.

• ... one cycle of the wave.

Decompress this run-length encoded sequence:

102130

• 123

• 000110

• 011000

• 010203

A = 1 B = 1 C = 0

What is the final output Y?

• 0

• 1

• 2

• 3

Select three operating system responsibilities.

• Error Handling

• Word Processing

• File Management

• Memory Management

• Compiling Code

In a Von Neumann architecture ...

• data and instructions are both stored in main memory.

• data and instructions are stored in separate memory devices.

• data is stored in main memory, instructions in secondary storage.

• data is stored in secondary storage, instructions in main memory.

Select three valid parts of the CPU.

• Memory Unit

• Control Unit

• ROM

• Arithmetic Logic Unit

• RAM

Which secondary device has the lowest latency?

• Optical Disk

• SSD

• Magnetic Hard Drive

• Cloud Storage