1.1 / 1.2 / 1.3 | GCSE OCR Computer Science J276

1.1 What does CPU stand for?

• Central Processing Unit

• Computer Protocol User

• Cool Pokemon Unit

• Computer Processing Unit

1.1 Bob has a 1GHZ dual core CPU, Amy has a 2GHZ single core CPU. Which can process more instructions per second?

• Bob

• Amy

• Equal

• Neither can process anything

1.1 Which of the following adjustments to an internal component could improve the performance of a CPU?

• Add more cores

• Decrease the cache

• Get a bigger motherboard

• Remove the OS

1.1 What happens if you increase the clock speed?

• CPU can process instructions quicker

• CPU can process more instructions at the same time

• CPU will explode

• CPU processes too fast for the cache to handle

1.1 What happens if you increase the number of cores

• CPU can process instructions quicker

• CPU can process more instructions at the same time

• CPU will explode

• CPU processes too fast for the cache to handle

1.1 Which of these is an embedded system (firmware)

• Computer

• Mobile Phone

• Pizza

• Microwave

1.1 Barry has a 1GHZ dual core CPU. He improves it to a 4GHZ quad core CPU. What is the effect on the performance of his computer?

• The number of instructions executed per second doubles

• The number of instructions executed per second triples

• The number of instructions executed per second quadruples

• The number of instructions executed per second improves by 8 times

1.1 Which of these are not a steps in the FDE cycle?

• Instructions are fetched from main memory

• Instructions are decoded in the control unit

• The decoded instruction is executed

• The ALU decodes the instructions

• The program counter transfers the data to be decoded to the MDR

1.1 Which of the following has the largest memory?

• RAM

• Cache

1.1 Which of the following is the fastest memory?

• RAM

• Cache