gate 2006 questions
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Printed Date: 06Feb2025 at 8:59pm
Topic: gate 2006 questions
Posted By: Adhiti
Subject: gate 2006 questions
Date Posted: 02Feb2007 at 11:54am
A cpu has a five stage pipeline and runs at 1
GHz fre. Instruction fetch happens in the first stage of the pipeline.
A conditional btanch instr. computes the target address and evaluates
the condition in the third stage of the pipeline. The processor stops
fetching new instructions following a conditional brach until the
branch outcome is known. A prg executes 10^9
instructions out of which 20% are conditional branches. If each
instruction take one cycle to complete on avg the total execution time
of the prg is
a] 1.o sec
b] 1.2 sec
c] 1.4 sec
d] 1.6 sec
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in q.52 it is written:
" The median of n elements can be found in O(n) time"
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see also q.54 "hard one"
how is it possible?
to find median from unsorted array we have to first sort it which takes O(n^2) time.
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Replies:
Posted By: Alok
Date Posted: 02Feb2007 at 4:31pm
I think if u have median as pivot element then u will get balanced partitioned, as median is the middle most element.
so complexity will be Theta(n log n) which is option B
i may be wrong, please correct me !
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