Quiz for Pass by value vs pass by reference

Q1: In C, how are arguments passed by default to functions?

A. By value B. By reference C. By pointer D. By address

Q2: When passing by value, changes made to the parameter inside the function:

A. Affect the original variable B. Do not affect the original variable C. Always modify the variable D. Cause compilation error

Q3: Which method allows modifying the original variable in a function?

A. Pass by value B. Pass by reference C. Pass by constant value D. Pass by array

Q4: In C, pass by reference is usually implemented using:

A. Pointers B. Structures C. Arrays D. Global variables

Q5: Which keyword is NOT used for pass by reference in C?

A. * B. & C. void D. None

Q6: What happens if you pass an array to a function in C?

A. It is copied completely B. Its base address is passed C. It is converted to a structure D. It is passed by value

Q7: Which is more memory efficient for large data sets?

A. Pass by value B. Pass by reference C. Both are same D. Depends on compiler

Q8: If a pointer is passed to a function and modified, what happens to the original variable?

A. It changes B. It remains same C. It causes error D. It becomes null

Q9: Which of the following is an advantage of pass by value?

A. Protects original data B. Allows direct modification C. Saves memory D. Avoids copying

Q10: Which statement about pass by reference is true?

A. It uses pointers in C B. It copies the variable C. It cannot modify original data D. It is the default in C

Q11: Passing structures by value can be:

A. Memory intensive B. Faster C. Error-free D. Compiler independent

Q12: To modify a variable from a function, you must pass:

A. A copy of variable B. The address of variable C. Its value D. A constant

Q13: In C, which is faster for large arrays?

A. Pass by value B. Pass by reference (via pointers) C. Equal speed D. Depends on OS

Q14: When passing by reference, you should pass:

A. Variable name B. Address of variable C. Copy of variable D. Constant value

Q15: Which operator is used to get the address of a variable?

A. * B. & C. -> D. .

Q16: Which operator is used to access value from a pointer?

A. * B. & C. -> D. .

Q17: Which of these can be modified in pass by value?

A. Local copy of variable B. Original variable C. Global variable directly D. Memory address

Q18: Passing pointers to a function is equivalent to:

A. Pass by reference B. Pass by value C. Pass by constant D. Pass by macro

Q19: Which is a drawback of pass by reference?

A. Can modify original data unintentionally B. Slower performance C. Consumes more memory D. Causes compilation errors

Q20: In C, strings are passed to functions as:

A. Pointers to char B. Array by value C. Array by copy D. Constant data