
C Programming Day-10
Authored by Vaishnavi K
Engineering
University
Used 2+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
1. What is the correct function to calculate the square root of a number in C?
sqrt()
pow()
sqr()
root()
Answer explanation
sqrt() returns the square root of a number. You must include math.h.
2.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
What does the function pow(2, 3) return?
5
6
7
8
Answer explanation
pow(a, b) returns a raised to the power b.
3.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Which of the following functions returns the absolute value of a number?
mod()
absval()
fabs()
abs()
Answer explanation
For integers, the correct function is abs() (from stdlib.h)
For floating-point numbers, use fabs() (from math.h)
4.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Which header file is needed for using ceil() and floor() functions?
stdio.h
stdlib.h
math.h
string.h
Answer explanation
ceil() gives the smallest integer ≥ number; floor() gives the largest integer ≤ number.
5.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
What does floor(3.8) return?
4.0
3.5
3.8
3.0
Answer explanation
floor() rounds down to the nearest integer.
6.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
What does strlen("hello") return?
5
4
Error
6
Answer explanation
strlen() counts characters in a string (excluding \0).
7.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Which function is used to copy one string into another?
strcat()
strcpy()
strlen()
strrev()
Answer explanation
strcpy(destination, source) copies the source string into destination.
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