Systems Programming Exam 1

Question 1

Which header file handles conversion functions like toupper()?

Accepted Answer

<ctype.h>

Question 2

What does the switch statement do?

Accepted Answer

Executes code based on the value that matches a specific case

Question 3

What is the purpose of the \0 character in a string?

Accepted Answer

Indicate the end of the string

Question 4

What is the purpose of the fgets() function?

Accepted Answer

To read a string with spaces, including the newline character

Question 5

The fgets() function automatically removes the newline character (
) from the input.

Accepted Answer

False

Question 6

What does the sizeof() function return?

Accepted Answer

Both a and b

Question 7

The strcmp() function returns 0 if two strings are equal.

Accepted Answer

True

Question 8

Which function is used to generate random numbers in C?

Accepted Answer

rand()

Question 9

The strlen() function returns the size of a string including the null terminator.

Accepted Answer

False

Question 10

Which format specifier is used for a double data type?

Accepted Answer

%lf

Question 11

What is the primary purpose of the <string.h> header file?

Accepted Answer

To handle string manipulation functions like strlen() and strcpy()

Question 12

The sizeof() operator returns the total size of an array in ________ when used as sizeof(arr).

Accepted Answer

bytes

Question 13

Which header file is required to use the printf() and scanf() functions?

Accepted Answer

<stdio.h>

Question 14

To get the number of elements in the array, you must divide the result of sizeof(arr) by ________.

Accepted Answer

sizeof(arr[0])

Question 15

What is the primary purpose of the fgets() function compared to scanf() for string input?

Accepted Answer

fgets() can read strings with spaces, while scanf() cannot

Question 16

The rand() function generates the same sequence of random numbers every time the program runs.

Accepted Answer

True

Question 17

What is the main difference between strcpy() and strncpy()?

Accepted Answer

strncpy() allows specifying the maximum number of characters to copy.

Question 18

Which of the following data types CANNOT be used in a switch statement in C?

Accepted Answer

float

Questions 18