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MMLU / Array A contains 256 elements of 4 bytes each. Its first element is stored at…

Problem

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question

Array A contains 256 elements of 4 bytes each. Its first element is stored at physical address 4,096.
Array B contains 512 elements of 4 bytes each. Its first element is stored at physical address 8,192.
Assume that only arrays A and B can be cached in an initially empty, physically addressed, physically tagged, direct-mapped, 2K-byte cache with an 8-byte block size. The following loop is then executed.
for (i = 0; i < 256; i++)
        A[i] = A[i] + B[2*i];
During the execution of the loop, how many bytes will be written to memory if the cache has a write-back policy?

choices

  1. 0
  2. 256
  3. 1024
  4. 2000

subject

college_computer_science

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Source and history

task_id
3f6f3739-d13d-51c1-b4ac-34458bc6f6f9
task_key
all--test--3f6f3739-d13d-51c1-b4ac-34458bc6f6f9
task_revision_id
1
config / split
all / test

Official source

initial import