OCR GCSE Computer Science - J277 Paper 1

Which component generates addresses

• Secondary Storage

• Processor

• Main Memory

• Control Unit

Moore’s Law?

• The performance increase of computers would eventually halt in 2020

• That the number of cores on a processor would double every year

• Predicted that the number of transistors on a circuit board would double ever year

• Computers would be capable of thinking and learning for themselves by 2020

What is the purpose of the accumulator?

• To hold the results of a calculation

• To hold the accumulation of instructions that are about to happen

• To hold the accumulation of instructions that have happened

• To perform arithmetic operations

What is held in cache?

• All of the programming instructions

• Instructions that have been processed

• Commonly used instructions and data

• Data that hasn’t been used for a long time

This sends signals such as “I/O Read”

• Control Unit

• Arithmetic Logic Unit

• Accumulator

• Cache

What is the fastest data storage in a computer (6-9)

• Registers
• RAM
• ROM
• HDD

Which storage device is not flash memory? (2-3)

• RAM
• Micro SD
• BIOS
• SD Card

This is volatile storage (1-3)

• RAM
• Secondary Storage
• ROM
• Hard Disk

How does data/instructions move between the CPU and RAM?

• Address Bus
• Address and Data Buses
• ROM

If the processing speed goes from 1GHZ to 4GHZ and the processor is changed from an 8 core to a dual core processor – what is the exact effect on the performance of the computer?

• The number of instructions executed per second quadruples

• The number of instructions executed per second doubles

• The number of instructions executed per second stays the same

• The number of instructions executed per second is halved