Question 2317 – KVS DEC-2017
May 9, 2024Question 14644 – DSSSB PGT 2018 Male
May 9, 2024Question 8627 – Programming
Suppose n and p are unsigned int variables in a C program. We wish to set p to nC3. If n is large, which one of the following statements is most likely to set p correctly?
Correct Answer: B
Question 39 Explanation:
n & p are unsigned int variable.
From the options n*(n-1)*(n-2) will go out of range. So eliminate A & D.
n*(n-1) is always an even number. So subexpression n(n-1)/2 also an even number.
n*(n-1)/ 2*(n-2), gives a number which is a multiple of 3. So dividing with 3 will not have any loss. Hence B is option.
From the options n*(n-1)*(n-2) will go out of range. So eliminate A & D.
n*(n-1) is always an even number. So subexpression n(n-1)/2 also an even number.
n*(n-1)/ 2*(n-2), gives a number which is a multiple of 3. So dividing with 3 will not have any loss. Hence B is option.
p = n * (n-1) * (n-2) / 6;
p = n * (n-1) / 2 * (n-2) / 3;
p = n * (n-1) / 3 * (n-2) / 2;
p = n * (n-1) * (n-2) / 6.0;
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