Free Test Function declaration, ... – C++ Lan...

Q1: What is the correct way to declare a function in C++?

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

Q2: Where is a function defined in C++?

A. Only in header file B. Only in source file C. Either header or source file D. Cannot define functions

Q3: Which part of function tells the compiler about function’s existence?

A. Function call B. Function definition C. Function declaration D. Function execution

Q4: How do you call a function named compute with no arguments?

A. compute; B. compute(); C. call compute; D. execute compute();

Q5: What keyword is used to define the return type of a function?

A. void B. int C. return D. Both A and B depending on function

Q6: What happens if a function does not return a value but declared with a non-void return type?

A. Compilation error B. Runtime error C. Undefined behavior D. No issue

Q7: Can functions be declared multiple times?

A. No B. Yes, multiple declarations allowed C. Only once D. Depends on function

Q8: Which is correct function definition syntax?

A. int add(int a, int b) { return a + b; } B. int add(a int, b int) { return a + b; } C. int add(int a; int b) { return a + b; } D. add(int a, int b) int { return a + b; }

Q9: What keyword is used to specify a function does not return a value?

A. int B. void C. null D. nothing

Q10: Can functions call other functions in C++?

A. Yes B. No C. Only main can call functions D. Only recursive calls allowed

Q11: What is function overloading?

A. Same function name with different return types B. Same function name with different parameters C. Different function names with same parameters D. Different function names with different parameters

Q12: Which of the following is not valid function overloading criteria?

A. Number of parameters B. Order of parameters C. Return type alone D. Type of parameters

Q13: How to declare a function prototype?

A. int multiply(int, int); B. int multiply() {} C. int multiply(int a, int b) {} D. int multiply;

Q14: What is the output of this code? int square(int x) { return x*x; } cout << square(5);

A. 25 B. 10 C. 5 D. Error

Q15: Can default arguments be specified in function declaration?

A. Yes B. No C. Only in definition D. Only in call

Q16: What happens if you call a function with fewer arguments than parameters with defaults?

A. Error B. Missing arguments replaced by default values C. Function skips call D. Program crashes

Q17: Can a function be defined inside another function in C++?

A. Yes B. No C. Only main can have nested functions D. Only inline functions

Q18: Which of the following is a correct call to function int add(int a, int b)?

A. add(2,3); B. add(a=2, b=3); C. add(2); D. add();

Q19: What is the return type of main() function in C++?

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

Q20: What keyword can specify inline function?

A. inline B. static C. extern D. virtual

Quiz for Function declaration, definition, and calling