AQA GCSE Computer Science - 3.4 Computer Systems L1-L6

What is a Boolean?

• A data type that is either True or False
• A data type that is either True, False, or And
• Another name for an integer
• A data type that is either -1 or 1

What logic gate is this?

• And
• Or
• Not
• Nor

What logic gate is this?

• Or
• And
• Xor
• Nor

For which values of A and B will Z be 1?

• A: 0, B: 1
• A: 1, B: 1
• A: 1, B: 0
• A: 0, B: 0

What is the Fetch-Decode-Execute cycle?

• The process to ensure instructions in a program are run
• A cycle where data is retrieved from the cache
• An activity that the CPU does to render graphics
• A hacking technique that bypasses secure networks

Which factors affect CPU performance?

• Cache memory
• Clock speed
• Processor cores
• Bandwidth size

How many Hertz are in one Gigahertz?

• 1 x 10^9
• 1 x 10^12
• 1 x 10^10
• 1 x 10^6

What are the benefits of cache memory? Select all that apply

• Cache memory can be accessed much faster than main RAM
• Cache memory contains frequently used data
• Cache memory is small in size
• Cache memory has multiple layers

What is the third step in the following options describing the fetch part of the cycle?

• The address of the next instruction is fetched from memory
• The register points to the next instruction
• The address of the next instruction is fetched from the register
• The address of the next instruction is put into a register

Which CPU in the following options has the third best performance?

• Single core processor at 5GHz with 4Mb cache
• Quad core processor at 1.5GHz with 2Mb cache
• Octa core processor at 1.7GHz with 3Mb cache
• Dual core processor at 2.5GHz with 3.5Mb cache