Which statement is true regarding abs() and labs()?
A. The abs() function is similar to the labs() function, except that the argument and the returned value each of them have type long int
B. The abs() function is not similar to the labs() function, except that the argument and the returned value in both functions have type long int
C. The abs() function is similar to the labs() function, except that the argument and the returned value each have type short int
D. The abs() function is not similar to the labs() function, except that the argument and the returned value in both function have type short int
Answer: Option A
Which standard library function is used to calculate the length of a string in C?
A. strlen()
B. strlength()
C. stringlen()
D. strsize()
What is the purpose of the 'printf' function in C?
A. To print formatted text to the standard output
B. To read text from the standard input
C. To open a file
D. To close a file
Which library should be included to use the 'sqrt' function in C?
A. math.h
B. stdlib.h
C. cmath.h
D. algorithm.h
What does the 'strcmp' function in C do?
A. Compares two strings and returns an integer indicating their relationship
B. Copies one string to another
C. Concatenates two strings
D. Searches for a substring

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