quiz

Cache Memory

Cache Memory Explained

1. Which of the following best describes a characteristic of cache memory?

  • A) High capacity, low speed
  • B) Low capacity, high speed
  • C) High capacity, low memory
  • D) Low capacity, low speed
B) Low capacity, high speed Explanation

2. What does the term “cache hit” refer to?

  • A) When data is successfully retrieved from the cache
  • B) When data is found in the main memory
  • C) When data is written to the cache for the first time
  • D) When the cache needs to be replaced
A) When data is successfully retrieved from the cache Explanation

3. Which level of cache memory is closest to the CPU cores and typically the smallest in size?

  • A) L2 Cache
  • B) L3 Cache
  • C) L4 Cache
  • D) L1 Cache
D) L1 Cache Explanation

4. Which of the following cache replacement policies replaces the least recently accessed data?

  • A) FIFO
  • B) Random Replacement
  • C) LRU
  • D) Write-Through
C) LRU Explanation

5. What is the function of the MESI protocol in cache memory systems?

  • A) To determine the size of the cache
  • B) To maintain cache coherency in multi-core systems
  • C) To manage the power consumption of the cache
  • D) None of these
B) To maintain cache coherency in multi-core systems Explanation

6. Which of the following is a cache metric used to measure the performance of a cache memory system?

  • A) Cache Hit
  • B) Cache Miss
  • C) Cache Access Time
  • D) All of the above
D) All of the above Explanation

7. Which type of cache memory policy involves writing data to both the cache and main memory simultaneously?

  • A) Write-Back
  • B) Write-Through
  • C) Write-Around
  • D) Write-Allocate
B) Write-Through Explanation

8. Which cache stores recent translations of virtual memory addresses to physical memory addresses?

  • A) Instruction cache
  • B) Data cache
  • C) Translation Lookaside Buffer
  • D) Cache Coherence Buffer
C) Translation Lookaside Buffer Explanation

9. How is the cache line number determined in direct mapping?

  • A)  i = j / m
  • B) i = j * m
  • C) i = j + m
  • D) i = j % m
D) i = j % m Explanation

10. Which field in a memory address is used to identify the specific memory block in fully associative mapping?

  • A) Index field
  • B) Tag field
  • C) Block offset field
  • D) Word field
B) Tag field Explanation

11. In a 2-way set associative cache with 16 lines, how many sets are there?

  • A) 2
  • B) 4
  • C) 8
  • D) 16
C) 8 Explanation

12. In direct mapping, what happens if a cache line is already occupied when a new memory block needs to be loaded?

  • A) The new block is stored in a different cache line.
  • B) The old block is replaced
  • C) The new block is stored in the main memory only.
  • D) Both blocks are stored in the cache.
B) The old block is replaced Explanation

13. Which addressing scheme in cache memory allows any block of memory to be placed in any cache line?

  • A) Direct-Mapped Cache
  • B) Fully Associative Cache
  • C) Set-Associative Cache
  • D) Direct Addressing
B) Fully Associative Cache Explanation

14. If the cache hit ratio is denoted by h, what is the formula to calculate the cache miss ratio?

  • A) 1−h
  • B) 1/h
  • C) h+1
  • D) h-1
A) 1−h Explanation

15. What happens during a cache flush?

  • A) The cache is filled with new data
  • B) The cache is refreshed with the most recent data
  • C) The cache is cleared of all data
  • D) The cache is disabled
C) The cache is cleared of all data Explanation

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