GCSE OCR Computer Science J277 Paper 1

The CPU (Central Processing Unit) continually

(a)   , ​ (b)   and ​ (c)   instructions.

• fetches
• decodes
• executes
• acquires
• decrypts
• encodes

In Von Neumann architecture, the part that stores the address of the location in memory for data to be fetched from or sent to is...

• Memory Address Register (MAR)
• Storage Address Register (SAR)
• Location Pointer Register (LPR)
• Data Address Register (DAR)

The part of the CPU that carries out arithmetic calculations and logical decisions is ...

• Input/Output (I/O)
• Arithmetic Logic Unit (ALU)
• Random Access Memory (RAM)
• Central Processing Unit (CPU)

Cache memory sits between the processor and main memory (RAM). The ​ (a)   looks into the cache for required data. If it is not there, it requests it from ​ (b)   . The data is moved into cache before being accessed by the CPU.

• CPU
• RAM
• Register
• Hard Drive
• Motherboard
• Graphics Card
• SSD
• Network Card

In Von Neumann architecture, the part that stores the address of the next instruction to be processed is the...

• Program Counter (PC)
• Random Access Memory (RAM)
• Central Processing Unit (CPU)
• Memory Address Register (MAR)

In Von Neumann architecture, the part that stores data fetched from memory or to be sent to memory is...

• Central Processing Unit (CPU)
• Input/Output (I/O) devices
• Control Unit (CU)
• Memory Data Register (MDR)

The CPU works at high speeds governed by the clock chip. The ​ (a)   the clock, the more ​ (b)   that can be completed per ​ (c)   .

• faster
• instructions
• second
• slower
• minute
• decodes

In Von Neumann architecture, the part that stores the RESULTS of any calculation carried out by the ALU is the...

• RAM

• Output Unit (OU)

• Accumulator (ACC)

• Control Unit (CU)

Cache memory can be accessed very quickly by the ​ (a)   , so having ​ (b)   cache will provide the CPU with ​ (c)   access to more data.

• CPU
• more
• fast
• GPU
• less
• slow
• RAM
• limited

If a CPU has multiple cores, it may be able to process more instructions ____________.

• quickly

• randomly
• efficiently
• simultaneously