- The minimum time delay between the initiations of two independent memory operations is called
a) access time b)cycle time c) transfer time d) latency time
- Which of the following comments are true?
- Which of the following are registers?
a) Accumulator b) Stack Pointer c) Program counter d)
Buffer
- A byte addressable computer has a memory capacity of 2m KB and can perform 2n operations. An instructions involving 3 operands and one operator needs a maximum of
a) 3m bits b) 3m+n bits c) m+n
bits d) none of these
[Hints: To specify a particular operation, out of the 2n
possible operations, one needs n bits. As the machine is byte addressable, to
specify a particular byte we need (m+10) bits (2(n+10) bytes are
there). So 3 addressable and 1 operations needs 3(m+10)+n=3m+n+30 bits]
- The number of columns in a state table for a sequential circuit with ‘m’ flip-flops and ‘n’ input is
- m+n b) m+2n c) 2m+n d) 2m+2n
[Hints: Present state + next state + input=m+m+n=2m+n]
- The addressing mode is used in an instruction of the form ADD X, Y is
- absolute b) immediate c) indirect d) index
- How many 2 – input MUX are required to construct a 210 input MUX?
- 1023 b) 31 c) 10 d) 127
[A 2 –input MUX can select a single
line out of the two – input lines. To select a signal line out of the 210,
i.e, 1024 input lines, we have to use 1023 two – input MUX]
- Let A be a set having ‘n’ elements. The number of binary operations that can be defined on A is
-
- The number of instructions needed to add ‘n’ numbers and store the results in memory using only one address instructions is
- n b) n-1 c) n+1 d) independent of n
- If memory access takes 20 ns with cache and 110 ns without it, then the hit – ratio (cache used a 10 ns memory) is
- 93% b) 90% c) 87% d) 88%
[Hints: 20=10h+(1-h)110]
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