Free Test Pass by value and pass... – C++ Lan...

Q1: In C++, what does pass by value mean?

A. A function receives a copy of the argument B. A function receives the original variable C. A function cannot modify argument D. Arguments are passed by pointers only

Q2: Which of the following is an example of pass by reference?

A. void func(int a) B. void func(int &a) C. void func(int *a) D. void func(int a[])

Q3: What is the effect of pass by reference?

A. Original variable can be modified B. Only copy is modified C. No variable is modified D. Creates a new variable

Q4: Which of the following passes arguments by value?

A. void swap(int &a, int &b) B. void swap(int a, int b) C. void swap(int *a, int *b) D. void swap(int a[])

Q5: What syntax is used to pass by reference in function parameters?

A. * B. & C. % D. @

Q6: What will happen if you modify a parameter passed by value?

A. Original argument changes B. Only local copy changes C. Compilation error D. Runtime error

Q7: When passing large objects, which method is more efficient?

A. Pass by value B. Pass by reference C. Pass by copy D. Pass by pointer

Q8: Which of these is NOT a valid way to pass by reference?

A. int &a B. int *a C. int a[] D. int a

Q9: What is the role of pointers in pass by reference?

A. Pointers are mandatory for pass by reference B. Pointers can simulate pass by reference C. Pointers prevent pass by reference D. Pointers and references are unrelated

Q10: Which statement about references in C++ is TRUE?

A. References can be null B. References must be initialized C. References can be reassigned D. References are pointers

Q11: How do you call a function with a reference parameter?

A. int a = 5; func(a); B. int a = 5; func(&a); C. int a = 5; func(*a); D. int a = 5; func(ref a);

Q12: What is one disadvantage of pass by reference?

A. Slower than pass by value B. Caller variable can be changed accidentally C. More memory usage D. Cannot pass const objects

Q13: Which of these ensures the function does NOT modify the argument passed by reference?

A. Passing by value B. Passing const reference C. Passing pointer D. Passing by pointer to const

Q14: What happens if you try to reassign a reference inside the function?

A. Reference now points to new variable B. It changes the original variable C. Compilation error D. Undefined behavior

Q15: Can arrays be passed by reference?

A. No, arrays can only be passed by value B. Yes, using pointer or reference syntax C. Yes, but only constant arrays D. No, arrays must be global

Q16: Which of these declares a function with a pointer parameter?