1.1.1c OCR A-Level CS

What is clock speed measured in?

• Meters

• Bytes

• Hertz

• Watts

What is the purpose of the cache in a CPU?

• To store permanent data

• To store temporary instructions and data

• To increase the size of the main memory

• To cool down the CPU

What does a quad-core processor mean?

• It has four times the cache size

• It has four times the clock speed

• It can only run four programs

• It has four separate processing units

Why is having a larger cache beneficial for a CPU?

• It allows more programs to run simultaneously

• It improves the CPU's cooling system

• It reduces the need to fetch data from main memory

• It increases the clock speed

What is the role of the control unit in a CPU?

• To execute instructions

• To store data

• To control the clock cycle

• To manage the cache

What is a chip multi-processor?

• A single-core processor

• A processor with multiple cores embedded in a single chip

• A processor with multiple cache units

• A processor with multiple control units

How can the performance of a CPU be further enhanced?

• By reducing the clock speed

• By increasing the size of the main memory

• By offloading tasks to specialized processors

• By increasing the number of cores

What is the relationship between clock speed and instruction execution?

• Lower clock speed means more instructions executed per second

• Clock speed has no effect on instruction execution

• Higher clock speed generally means more instructions executed per second

• Higher clock speed always means more instructions executed per second

Why might having more CPU cores not always result in better performance?

• More cores always result in better performance

• Programs may not be designed to use multiple cores

• More cores reduce the clock speed

• More cores increase the size of the cache

What is the size of a single gigahertz in terms of operations per second?

• One million

• One billion

• One trillion

• One thousand