Chapter Exam

Chapter 11: Functions — Online MCQ Test

Q: What is the primary advantage of using functions in C++?

Answer: B. To promote code reusability and modularity — Functions allow breaking down large programs into smaller, manageable, and reusable blocks of code.

Q: Which of the following is a parameter type where the actual value is copied to the formal parameter?

Answer: C. Call-by-value — In call-by-value, a copy of the actual argument's value is passed to the function, so changes to the formal parameter do not affect the original value.

Q: In C++, what character is used to denote a reference parameter in a function definition?

Answer: B. & — The address-of operator '&' is used in the function signature to indicate that the parameter is passed by reference.

Q: In a scope conflict, which variable takes precedence?

Answer: B. Local variable — A local variable with the same name as a global variable will 'shadow' the global variable, taking precedence within the local scope.

COMPUTER SCIENCE · CLASS 11th · Tamil Nadu State Board

Practice Chapter 11: Functions with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 11th COMPUTER SCIENCE. This chapter covers: Focusing on modular programming this chapter covers function declarations parameters passing mechanisms call-by-value call-by-reference and scope rules. Students explore inline fun.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 11: Functions — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 11th COMPUTER SCIENCE — Chapter 11: Functions, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the primary advantage of using functions in C++?

A. To increase memory usage
B. To promote code reusability and modularity ✓
C. To make the program execute faster automatically
D. To eliminate the need for variables

Answer: B. To promote code reusability and modularity
Functions allow breaking down large programs into smaller, manageable, and reusable blocks of code.

Which of the following is a parameter type where the actual value is copied to the formal parameter?

A. Call-by-reference
B. Call-by-address
C. Call-by-value ✓
D. Call-by-pointer

Answer: C. Call-by-value
In call-by-value, a copy of the actual argument's value is passed to the function, so changes to the formal parameter do not affect the original value.

In C++, what character is used to denote a reference parameter in a function definition?

A. *
B. & ✓
C. %
D. #

Answer: B. &
The address-of operator '&' is used in the function signature to indicate that the parameter is passed by reference.

Analyze the effect: If a function uses 'call-by-reference', what is the impact on the original variable passed from the main function?

A. The original variable remains unchanged
B. The original variable is copied to a new memory location
C. Changes made to the formal parameter affect the original variable ✓
D. The program results in a segmentation fault

Answer: C. Changes made to the formal parameter affect the original variable
Call-by-reference passes the memory address, so any modification to the formal parameter directly updates the original argument.

In a scope conflict, which variable takes precedence?

A. Global variable
B. Local variable ✓
C. Static variable
D. None, the compiler throws an error

Answer: B. Local variable
A local variable with the same name as a global variable will 'shadow' the global variable, taking precedence within the local scope.