L4 Slides – Computer Systems – KS4

Multiple Choice

Which of the following best describes the function of registers in a CPU?

• A location to store attendance

• A small fast access memory location

• A location to store status quickly

• A place to store programs

Multiple Choice

What is a clock?

• A clock records the number of cycles

• A clock times how long a processor has been running

• A clock synchronises the cycles per second

Multiple Choice

What is a register?

• A location to store attendance

• A small, fast access memory location

• A location to store status quickly

Multiple Choice

What is the role of the ALU?

• The ALU carries out logical and mathematical operations

• The ALU helps to save to memory

• The ALU controls the bus system

Multiple Choice

What does ALU stand for?

• Arithmetic logic unit

• Arithmetic link unit

• Algorithm logic unit

Open Ended

Why is understanding the main memory important for computer systems?

Multiple Choice

What does RAM stand for?

• Readily Available Memory
• Rapid Access Module
• Random Allocation Method
• Random Access Memory

Multiple Choice

What does ROM stand for?

• Rapid-Only Memory
• Read-Only Memory

• Random-Only Memory
• Read-Only Module

Multiple Choice

What are the two main types of main memory and their basic functions?

• RAM - Read only, ROM - Read and write

• RAM - Read and write, ROM - Read only

• RAM - Stores permanent instructions, ROM - Stores instructions for CPU

• RAM - Non-volatile, ROM - Volatile

Multiple Choice

Which of the following statements about RAM is correct?

• RAM stores permanent instructions for booting up the computer.

• RAM is read only.

• RAM stores instructions and data ready for a CPU to execute.

• RAM is non-volatile.

Open Ended

Describe the process that occurs when a program is executed in terms of RAM and the CPU.

Open Ended

Explain why a computer system might run slowly if it does not have enough RAM.

Multiple Select

Select all statements that are true about volatile and non-volatile memory.

• Volatile memory loses data when power is off.

• Non-volatile memory keeps data when power is off.

• RAM is non-volatile memory.

• ROM is volatile memory.

Multiple Choice

Which type of main memory is volatile and which is non-volatile?

• RAM is volatile, ROM is non-volatile

• RAM is non-volatile, ROM is volatile

• Both RAM and ROM are volatile

• Both RAM and ROM are non-volatile

Open Ended

Explain the difference in storage capacity between RAM and ROM based on the information provided.

Multiple Choice

Which type of main memory typically has a capacity of 1-256GB?

• RAM

• ROM

• Cache

• Flash

Multiple Choice

What is the role of secondary storage when a computer system runs out of main memory?

• It acts as an extension of main memory

• It replaces the main memory

• It stores only the operating system

• It increases the speed of the CPU

Open Ended

If we already have two types of main memory, why does a computer system need a form of secondary memory, such as a hard disk drive?

Multiple Choice

What is the main function of cache memory in a computer system?

• To store all data permanently

• To improve performance by saving frequently used instructions and data

• To connect the CPU to external devices

• To increase the size of RAM

Multiple Select

Select all correct statements about cache memory based on the lesson.

• Cache stores frequently used instructions and data.

• L3 cache is faster than RAM.

• L1 cache is the slowest cache.

• Cache is not important for CPU performance.

Open Ended

Explain how the proximity of cache to the CPU affects its speed and size.

(proximity = how close it is)

Multiple Choice

Which of the following statements about cache levels is correct?

• L1 cache is the largest but slowest.

• L2 cache is usually part of the RAM.

• L3 cache is slower than RAM.

• L1 cache is the fastest but can store the least.

Open Ended

How does cache help speed up the process of fetching instructions from RAM?