Description
Please answer each question in the attached file according to the requirements in the questions. Please write the explanation of the all the questions.
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Explanation & Answer
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1) A. Only two operations are available: push and pop.
Push gets its input from the input stream, and pop sends its
output to the output stream.
The input stream consists of only three items, a, b, c, only in
that order.
Ordering: Commands to achieve this output:
1. a, b, c
push, pop, push, pop, push, pop
2. a, c, b
push, pop, push, push, pop, pop
3. b, c, a
push, push, pop, push, pop, pop
4. b, a, c
push, push, pop, pop, push, pop
5. c, a, b
IMPOSSIBLE
6. c, b, a
push, push, push, pop, pop, pop
Explanation: A stack is a LIFO mode of data structure, so
keeping that in mind these are the possible sequences in order
to get the defined permutations of output.
B. Only three operations: enq, deq, and bypass.
Enq gets its input from the input stream, and deq sends its
output to the output stream. Bypass transfers an item directly
from input stream to output stream.
The input stream consists of only three items, a, b, c, only in
that order.
Ordering: Commands to achieve this output:
1. a, b, c
bypass, bypass, bypass
2. a, c, b
bypass, enq, bypass, deq
3. b, c, a
enq, bypass, bypass, deq
4. b, a, c
enq, bypas...
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