What is the purpose of a cache memory in a computer system?

Solution (By Examveda Team)

Option D: Store frequently accessed data for quick retrieval
Cache memory is designed to store copies of frequently accessed data from main memory (RAM) or instructions from the CPU. Its purpose is to provide faster access to data and instructions that are likely to be needed soon, reducing the average time to access data from the main memory.

In this context:
   - Cache memory operates on the principle of locality, exploiting the fact that most programs access a relatively small portion of memory at any given time.
   - It helps improve the overall performance of the computer system by reducing the latency involved in accessing data from slower main memory.
   - Cache memory is typically faster and smaller in size compared to main memory, allowing it to deliver faster data access times.

Option A: Run background processes
Background processes typically refer to tasks or programs that run independently of the user's direct control. Cache memory is not responsible for running background processes.

Option B: Maintain file system integrity
File system integrity is primarily managed by the operating system and file system software, ensuring data consistency and reliability. Cache memory does not directly contribute to file system integrity.

Option C: Execute machine instructions
Execution of machine instructions is handled by the CPU and its components, including the ALU (Arithmetic Logic Unit) and control unit. Cache memory does not execute machine instructions; it stores data and instructions for quicker access.

Conclusion:
Among the given options, Option D: Store frequently accessed data for quick retrieval accurately describes the purpose of cache memory in a computer system.