OCR J277 GCSE Paper 1 Recap

What does the ALU do?

• Stores data

• Fetches instructions

• Performs calculations

• Controls hardware

What is the function of the Control Unit?

• Manages execution of instructions

• Performs calculations

• Stores data

• Manages RAM

What cycle describes how the CPU processes instructions?

• Boot cycle

• Memory cycle

• CPU cycle

• Fetch-Decode-Execute cycle

What is clock speed measured in?

• Bytes

• Kilobytes

• Gigahertz (GHz)

• Megabytes

How does increasing the number of CPU cores affect performance?

• Slows it down

• Allows multiple instructions to be executed simultaneously

• Reduces the need for cache

• Increases RAM usage

Which memory type is volatile?

• RAM

• ROM

• SSD

• HDD

What is stored in ROM?

• User files

• BIOS/Firmware

• Temporary data

• Operating system cache

What type of secondary storage has no moving parts?

• Hard disk drive (HDD)

• Solid-state drive (SSD)

• Optical disc

• Magnetic tape

What is the main advantage of an SSD over an HDD?

• Faster read/write speed

• Larger storage capacity

• More durable

• Less expensive

How is data stored on an optical disc?

• Magnetically

• Using pits and lands

• Electrically

• Mechanically