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Computer System Architecture MCQ - Memory Hierarchy

26 How many RAM chips of size (256K x 1 bit) are required to build 1M Byte memory ?

27 If each address space represents one byte of storage space, how many address lines are needed to access RAM chips arranged in a 4 x 6 array, where each chip is 8K x 4 bits

As there are 4*6 = 24 chips so (as 2⁵>= 24 ) 5 bits are required to address them.
in each RAM number of bytes=(8k*4)/8 = 4k
So to represent 4k we need(as 2¹²=4096) 12 bits
Therefore to represent total structure we need 12+5=17 bits.

28 Four memory chips of 16 x 4 size have their address bases connected together. The system will be of size

29 How many addresses are required for 25 x 40 video RAM

30 Which of the following statements is true ?

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Question:

An 8KB direct-mapped write back cache is organized as multiple blocks, each of size 32 bytes. The processor generates 32 bit addresses. The cache controller maintains the tag…

A. 4864 bits
B. 6144 bits
C. 6656 bits
D. 5376 bits

Correct answer: D

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