GATE CS 2015 Set 3 — Question 63
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Programming & Data Structures → Arrays & Strings → Array Operations (1D, 2D)
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Question
Suppose is an array of length , where all the entries are from the set .
For any positive integers and , consider the following pseudocode.If and , then the output of DOSOMETHING() is ________.
For any positive integers and , consider the following pseudocode.
DOSOMETHING (c, a, n)
z <- 1
for i <- 0 to k - 1
do z <- z^2 mod n
if c[i] = 1
then z <- (z * a) mod n
return z
Correct answer
0 to 0
Solution
We trace the execution with . Initial .Iteration ():
Since , Iteration ():
Since , no change.Iteration ():
Since , Iteration ():
Since , Final return value is 0.
Since , Iteration ():
Since , no change.Iteration ():
Since , Iteration ():
Since , Final return value is 0.
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