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C-PROGRAMMING PRACTICE SET-1

C- Programming Practice Set 1

Test Your C Programming Knowledge

1 / 25

What is the output of the following code snippet?

int a = 5, b = 7;

int c = (a > b) ? (a + b) : (b – a);

printf(“%d”, c);

2 / 25

Which of the following is not a valid way to represent an integer constant in C?

0x0A

010

1.0

3 / 25

What does the `continue` statement do in a loop?

It terminates the loop and resumes execution after the loop.

It skips the current iteration and continues with the next iteration of the loop.

It restarts the loop from the beginning.

It converts a loop into an infinite loop.

4 / 25

The `malloc()` function is used for:

Memory allocation for variables

Memory deallocation

Dynamic memory allocation

Defining macros

5 / 25

What will be the output of the following code snippet?

int i;

for (i = 0; i < 3; i++) {

printf(“%d “, i);

}

0 1 2

1 2 3

0 1 2 3

1 2 3 4

6 / 25

The fprintf() function is used to:

Read from a file

Write to a file

Read from the console

Write to the console

7 / 25

What is the output of the following code snippet?

int arr[5] = {1, 2, 3, 4, 5};

printf(“%d”, arr[5]);

Garbage value

8 / 25

The NULL macro in C is used to represent:

An empty character

A void pointer

A null-terminated string

A null character

9 / 25

What is the value of the variable X after the following code snippet is executed?

int x = 10;

x += 5;

x *= 2;

x /= 3;

10 / 25

The C standard library function strcpy() is used to:

Compare two strings

Concatenate two strings

Copy one string to another

Find the length of a string

11 / 25

What is the return type of the strlen() function?

int

char

size_t

void

12 / 25

What will be the output of the following code snippet?

int i = 0;

do { printf(“%d “, i);

i++;

} while (i < 5);

0 1 2 3 4

1 2 3 4 5

0 1 2 3

1 2 3 4

13 / 25

In C, the scope of a variable declared inside a function is limited to:

The function itself

The entire program

The file where the function is defined

The block in which the variable is declared

14 / 25

The statement sizeof(int) returns the size of an integer in:

bits

bytes

kilobytes

megabytes

15 / 25

What is the correct way to initialize an array in C?

int arr[5] = {1, 2, 3, 4, 5};

int arr[5] = {1, 2, 3};

int arr[5] = 5;

int arr[] = {1, 2, 3, 4, 5};

16 / 25

Which header file should be included to work with strings in C?

<strings.h>

<string.h>

<str.h>

<stdio.h>

17 / 25

int x = 10, y = 20;

int z = (x > y) ? x : y;

printf(“%d”, z);

Compilation Error

18 / 25

What is the purpose of the break statement in a switch statement?

To end the program execution

To exit the loop

To exit the switch statement

To skip the current iteration of the loop

19 / 25

In C, the expression (5>2) ? 1:0 evaluates to:

true

false

20 / 25

What does the fgets() function do?

Reads a character from a file

Reads a line from a file

Reads a formatted string from the console

Reads an integer from the console

21 / 25

What is the size of the “int” data type in bytes on a 64-bit machine?

Depends on Compiler

22 / 25

Which C keyword is used to define an alias for a data type?

typedef

alias

define

type

23 / 25

What will be the output of the following code snippet?

int x = 5;

printf(“%d”, x++);

Compiler Error

24 / 25

Which of the following is the correct way to declare an integer variable in C?

integer x;

var x;

int x;

x = int;

25 / 25

What is the extension of C source files?

.cpp

.txt

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C-PROGRAMMING PRACTICE SET-2

3

C-Programming Set -2
Test your C-Programming Knowledge

1 / 25
Which header file should be included to work with character handling functions in C?
ctype.h
string.h
char.h
chandler.h

2 / 25
Which header file should be included to work with time and date functions in C?
datetime.h
time.h
date.h
timedate.h

3 / 25
What will be the output of the following code snippet?
int x = 5;
printf(“%d”, x++ + ++x);
10
11
12
13

4 / 25
What is the return type of the toupper() function in C?
int
char
void
bool

5 / 25
In C, what is the purpose of the restrict keyword?
Marks a variable as non-modifiable
Specifies that a pointer points to a constant
Provides a hint to the compiler for optimization
Declares a variable as global

6 / 25
What is the purpose of the strncpy() function in C?
Compare two strings
Concatenate two strings
Copy one string to another with a specified length
Reverse a string

7 / 25
What does the feof() function in C check for?
End of file indicator
Formatting errors
File permissions
Memory allocation errors

8 / 25
What is the output of the following code snippet?
int a = 5;
int b = a > 4 ? a++ : ++a;
printf(“%d”, b);
5
6
7
8

9 / 25
The fwrite() function is used to:
Read data from a file
Write data to a file
Append data to a file
Close a file

10 / 25
What will be the output of the following code snippet?
int x = 5;
int y = x | 3;
printf(“%d”, y);
7
3
5
2

11 / 25
Which of the following is a valid way to declare a function pointer in C?
int (*ptr)();
int ptr();
ptr (*int)();
ptr (*funcptr)();

12 / 25
What is the output of the following code snippet?
char str[] = “Hello”;
str[1] = ‘a’;
printf(“%s”, str);
Hello
Hella
Hllo
Hallo

13 / 25
What is the output of the following code snippet?
int x = 5;
printf(“%f”, x / 2);
2.500000
2.000000
2.5
2

14 / 25
What will be the output of the following code snippet?
int x = 5;
int y = 10;
printf(“%d”, x < 5 ? x++ : y--);
5
6
9
10

15 / 25
What does the static keyword do when used with a global variable in C?
Limits the variable's scope to the current function
Allocates memory on the heap for the variable
Keeps the variable's value across function calls
Makes the variable constant

16 / 25
What is the value of the expression sizeof('A') in C?
1
2
4
Depends on the system

17 / 25
What is the output of the following code snippet?
char str1[] = “Hello”;
char str2[] = “Hello”;
if (str1 == str2)
printf(“Same”);
else
printf(“Different”);
Same
Different
Compiler error
Undefined behavior

18 / 25
In C, what is the purpose of the “volatile” keyword?
Indicates that a variable cannot be modified
Declares a constant variable
Specifies that a variable's value may change at any time
Specifies that a variable is shared among multiple threads

19 / 25
Which header file should be included to work with mathematical functions in C?
math.h
stdlib.h
string.h
cmath.h

20 / 25
What is the output of the following code snippet?
int x = 5, y = 10;
printf(“%d”, x > y ? x : y);
5
10
Compiler error
Undefined behavior

21 / 25
Which of the following is a bitwise operator in C?
&&
||
!
&

22 / 25
What is the purpose of the “strupr()” function in C?
Convert a string to uppercase
Convert a string to lowercase
Reverse a string
Trim whitespace from a string

23 / 25
What will be the output of the following code snippet?
int x = 10;
printf(“%d”, x % 3);
0
1
2
3

24 / 25
What is the purpose of the “strcat()” function in C?
Compare two strings
Copy one string to another
Find the length of a string
Concatenate two strings

25 / 25
What is the purpose of the exit() function in C?
To end a loop
To close a file
To exit a function
To terminate the program

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C-PROGRAMMING PRACTICE SET-3

C-PROGRAMMING SET 3

TEST YOUR C-PROGRAMMING KNOWLEDGE

1 / 25

In C, can a function call itself?

Yes, but only for functions with a return type of int.

No, recursive functions are not allowed in C.

Yes, using the self keyword.

Yes, recursive functions are allowed.

2 / 25

Which statement is used to terminate a loop in a function?

end

terminate

break

stop

3 / 25

What is the output of the following code?

void greet() {
printf(“Hello, world!”);
}

int main() {
greet();
return 0;
}

Hello, world!

Hello

World!

The code contains an error.

4 / 25

What is the purpose of the `return` statement in a function?

It ends the program execution.

It specifies the data type of the function.

It returns a value from the function.

It defines the parameters of the function.

5 / 25

Which part of a function is executed when the function is called?

The function prototype

The function definition

The function's return statement

The function's arguments

6 / 25

Which of the following is true about a function’s return statement?

A function must always have a return statement.

A function without a return type cannot have a return statement.

A return statement must always be followed by a value.

A return statement immediately terminates the function.

7 / 25

How do you declare a function without argument and without return type?

function name()

function name(void)

function name

void function name

8 / 25

What is the main purpose of a function without argument and without return type?

To perform calculations with multiple variables.

To take arguments from the user.

To execute a series of statements and actions.

To return a value to the main function.

9 / 25

What is the role of a function prototype for a function with argument and without return type?

It provides the arguments needed to call the function.

It specifies the return type of the function.

It provides information about the function's name and arguments.

It indicates that the function cannot be called.

10 / 25

What is the primary purpose of a function with argument and without return type?

To take arguments and return multiple values.

To perform calculations and return a single value.

To perform actions without returning a value.

To take no arguments and return no value.

11 / 25

What does the `void` keyword mean in a function declaration?

It specifies that the function cannot be called.

It indicates that the function takes no arguments.

It indicates that the function doesn't return a value.

It indicates that the function returns an integer.

12 / 25

What is the primary characteristic of a function without argument and return type?

It doesn't perform any calculations.

It doesn't take any arguments and doesn't return a value.

It always returns the value 0.

It is not allowed in C programming.

13 / 25

Which keyword is used to define the data type of the value returned by a function?

data

type

return

None of the above

14 / 25

What is the purpose of a function with argument and return type?

It performs calculations without returning a value.

It returns a value without taking any arguments.

It takes arguments, processes them, and returns a value.

It takes no arguments and returns no value.

15 / 25

What is the purpose of the `sizeof` operator in C?

It returns the size of a datatype in bytes.

It returns the size of a variable in bits.

It returns the number of elements in an array.

It returns the number of characters in a string.

16 / 25

Which operator is used to access the value at the address stored in a pointer variable?

17 / 25

What is the output of the following code?

int x = 10;
if (x > 5) {
printf(“Hello”);
} else {
printf(“World”);
}

Hello

World

HelloWorld

The code contains an error.

18 / 25

In which type of loop is the loop body guaranteed to execute at least once?

for loop

while loop

do-while loop

They all guarantee this behavior.

19 / 25

How would you find the sum of all even numbers from 1 to 100 using a loop?

Use a for loop with an if condition to check for even numbers.

Use a while loop with a modulo operator.

Use a do-while loop with a counter variable.

Use a combination of if statements and nested loops.

20 / 25

Which loop would you use to iterate through the elements of an array?

for loop

while loop

do-while loop

switch loop

21 / 25

Which of the following is true about recursive functions in C?

Recursive functions cannot call themselves.

Recursive functions must always have a return statement.

Recursive functions can lead to infinite recursion if not properly controlled.

Recursive functions can only be used with loops.

22 / 25

What is the purpose of the `void` keyword in a function declaration?

To indicate that the function has no parameters

To indicate that the function returns no value

To indicate that the function accepts any data type

To indicate that the function is optional

23 / 25

How are function arguments passed to the called function in C?

By value

By reference

By name

By address

24 / 25

Which keyword is used to return a value from a function in C?

value

return

result

get

25 / 25

What is a function prototype in C?

A function that has been declared but not defined

A function that has no parameters

A function that returns a void pointer

A function that has no return type

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Interview Questions

C-PROGRAMMING PRACTICE SET-1

What is the output of the following code snippet?

int a = 5, b = 7;

int c = (a > b) ? (a + b) : (b – a);

printf(“%d”, c);

Which of the following is not a valid way to represent an integer constant in C?

What does the continue statement do in a loop?

The malloc() function is used for:

C-PROGRAMMING PRACTICE SET-2

Which header file should be included to work with character handling functions in C?

Which header file should be included to work with time and date functions in C?

What will be the output of the following code snippet?

int x = 5; printf(“%d”, x++ + ++x);

What is the return type of the toupper() function in C?

In C, what is the purpose of the restrict keyword?

What is the purpose of the strncpy() function in C?

What does the feof() function in C check for?

What is the output of the following code snippet?

int a = 5; int b = a > 4 ? a++ : ++a; printf(“%d”, b);

The fwrite() function is used to:

What will be the output of the following code snippet?

int x = 5; int y = x | 3; printf(“%d”, y);

Which of the following is a valid way to declare a function pointer in C?

What is the output of the following code snippet?

char str[] = “Hello”; str[1] = ‘a’; printf(“%s”, str);

What is the output of the following code snippet?

int x = 5; printf(“%f”, x / 2);

What will be the output of the following code snippet?

int x = 5; int y = 10; printf(“%d”, x < 5 ? x++ : y--);

What does the static keyword do when used with a global variable in C?

What is the value of the expression sizeof('A') in C?

What is the output of the following code snippet?

char str1[] = “Hello”; char str2[] = “Hello”; if (str1 == str2) printf(“Same”); else printf(“Different”);

In C, what is the purpose of the “volatile” keyword?

Which header file should be included to work with mathematical functions in C?

What is the output of the following code snippet?

int x = 5, y = 10; printf(“%d”, x > y ? x : y);

Which of the following is a bitwise operator in C?

What is the purpose of the “strupr()” function in C?

What will be the output of the following code snippet?

int x = 10; printf(“%d”, x % 3);

What is the purpose of the “strcat()” function in C?

What is the purpose of the exit() function in C?

C-PROGRAMMING PRACTICE SET-3

In C, can a function call itself?

Which statement is used to terminate a loop in a function?

What is the output of the following code?

What is the purpose of the return statement in a function?

Which part of a function is executed when the function is called?

Which of the following is true about a function’s return statement?

How do you declare a function without argument and without return type?

What is the main purpose of a function without argument and without return type?

What is the role of a function prototype for a function with argument and without return type?

What is the primary purpose of a function with argument and without return type?

What does the void keyword mean in a function declaration?

What is the primary characteristic of a function without argument and return type?

Which keyword is used to define the data type of the value returned by a function?

What is the purpose of a function with argument and return type?

What is the purpose of the sizeof operator in C?

Which operator is used to access the value at the address stored in a pointer variable?

What is the output of the following code?

In which type of loop is the loop body guaranteed to execute at least once?

Which loop would you use to iterate through the elements of an array?

Which of the following is true about recursive functions in C?

What is the purpose of the void keyword in a function declaration?

How are function arguments passed to the called function in C?

Which keyword is used to return a value from a function in C?

What is a function prototype in C?

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What does the `continue` statement do in a loop?

The `malloc()` function is used for:

int x = 5;
printf(“%d”, x++ + ++x);

What is the return type of the `toupper()` function in C?

In C, what is the purpose of the `restrict` keyword?

What is the purpose of the `strncpy()` function in C?

What does the `feof()` function in C check for?

int a = 5;
int b = a > 4 ? a++ : ++a;
printf(“%d”, b);

The `fwrite()` function is used to:

int x = 5;
int y = x | 3;
printf(“%d”, y);

char str[] = “Hello”;
str[1] = ‘a’;
printf(“%s”, str);

int x = 5;
printf(“%f”, x / 2);

int x = 5;
int y = 10;
printf(“%d”, x < 5 ? x++ : y--);

What does the `static` keyword do when used with a global variable in C?

What is the value of the expression `sizeof('A')` in C?

char str1[] = “Hello”;
char str2[] = “Hello”;
if (str1 == str2)
printf(“Same”);
else
printf(“Different”);

int x = 5, y = 10;
printf(“%d”, x > y ? x : y);

int x = 10;
printf(“%d”, x % 3);

What is the purpose of the `exit()` function in C?

What is the purpose of the `return` statement in a function?

What does the `void` keyword mean in a function declaration?

What is the purpose of the `sizeof` operator in C?

What is the purpose of the `void` keyword in a function declaration?

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