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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 information for each cache block comprises 1 Valid bit, 1 Modified bit, as many bits as the minimum needed to identify the memory block […]

Architecture MCQ



A CPU generates 32-bit addresses. The block size is 4 K Bytes. The processor has a Cache which can hold a total of 128 blocks and is 4-way set associative. The minimum size of the cache tag is: (A) 11 bits (B) 13 bits (C) 15 bits (D) 20 bits […]

A CPU generates 32-bit addresses. The block size is 4 ...



 Consider a direct mapped cache of size 32 KB with block size 32 bytes. The CPU generates 32 bit addresses. The number of bits needed for cache indexing and the number of tag bits are respectively. (A) 10, 17 (B) 10, 22 (C) 15, 17 (D) 5, 17   Explanation: […]

Consider a direct mapped cache of size 32 KB with ...


A computer system implements a 40 bit virtual address, page size of 8 kilobytes, and a 128-entry translation look-aside buffer (TLB) organized into 32 sets each having four ways. Assume that the TLB tag does not store any process id. The minimum length of the TLB tag in bits is […]

A computer system implements a 40 bit virtual address, page ...


Assume that for a certain processor, a read request takes 50 nanoseconds on a cache miss and 5 nanoseconds on a cache hit. Suppose while running a program, it was observed that 80% of the processor’s read requests result in a cache hit. The average read access time in nanoseconds […]

Assume that for a certain processor, a read request takes ...



A system has 6 identical resources and N processes competing for them. Each process can request atmost 2 resources. Which one of the following values of N could lead to a deadlock? A 1 B 2 C 3  D 4 Explanation: It seems to be wrong question in GATE exam. […]

A system has 6 identical resources and N processes competing ...


An unordered list contains n distinct elements. The number of comparisons to find an element in this list that is neither maximum nor minimum is A Θ(nlogn) B Θ(n) C Θ(logn)  D Θ(1) Explanation: We only need to consider any 3 elements and compare them. So the number of comparisons […]

An unordered list contains n distinct elements. The number of ...


Consider the following statements: 1. The complement of every Turning decidable language is Turning decidable 2. There exists some language which is in NP but is not Turing decidable 3. If L is a language in NP, L is Turing decidable Which of the above statements is/are True?  A Only […]

Consider the following statements: 1. The complement of every ...