Free Test Function declaration, ... – C Language

Q1: Which of the following correctly declares a function in C?

A. int sum(int, int); B. int sum(a, b); C. declare int sum(int, int); D. sum(int, int);

Q2: What is another term for a function declaration in C?

A. Function calling B. Function prototype C. Function definition D. Function recursion

Q3: Which keyword is used to define a function in C?

A. define B. function C. No keyword is required D. func

Q4: Which part of a function specifies the actual body of execution?

A. Function prototype B. Function definition C. Function call D. Return type

Q5: How many times can a function be defined in a C program?

A. Only once B. Twice C. Multiple times D. Depends on the compiler

Q6: Which of the following correctly calls a function named display with no parameters?

A. display; B. display() C. display[] D. call display()

Q7: What will happen if you call a function without declaring it first in C?

A. It will compile normally B. Compiler error C. Runtime error D. Nothing happens

Q8: Which of the following is NOT part of a function declaration?

A. Return type B. Function name C. Parameter list D. Function body

Q9: When a function is called, the control of the program

A. Remains in the same function B. Jumps to the function definition C. Ends the program D. Restarts from main()

Q10: A function declaration must end with:

A. Colon B. Comma C. Semicolon D. Parenthesis

Q11: Which function in C is always executed first?

A. start() B. begin() C. main() D. first()

Q12: What is the return type of a function that does not return a value?

A. int B. void C. null D. empty

Q13: Which is the correct syntax for defining a function with no parameters and returning an integer?

A. int func() B. func() int C. function int func() D. int func(void)

Q14: A function can call:

A. Only other functions B. Only itself C. Itself and other functions D. Only main()

Q15: Which is true about function overloading in C?

A. It is allowed B. It is not allowed C. Allowed only for inline functions D. Allowed in C99

Q16: Which of the following is NOT a valid return type in C?

A. int B. float C. string D. char

Q17: What is it called when a function calls itself?

A. Recursion B. Looping C. Nesting D. Chaining

Q18: If a function is declared but not defined, what happens?

A. Compiler error B. Linker error C. Runtime error D. No error

Q19: Which of the following is an example of a parameter in a function?

A. int x B. return 0 C. void D. printf

Q20: What happens if a function does not have a return statement in C?

A. It returns 0 automatically B. It returns garbage value C. It causes undefined behavior if return type is not void D. It gives a syntax error

Quiz for Function declaration, definition, and calling