CBSE Class 12 Computers Constructors And Destructors Worksheet

1. Differentiate between

a. constructor and destructor.

b. constructor and member function.

c. Implicit and explicit constructor call

2. What is the need for user‐defined constructors and destructors, if default constructors and destructors are available?

3. List the characteristics of constructor and destructor.

4. When is a destructor called? Explain the concept w.r.t. local and global objects.

5. Constructors and Destructors should always be defined as public. Justify.

6. What is a copy constructor? How is it different from the assignment operator? Explain with the help of an example. When is it called?

7. Refer to Q4, Q8 and Q9 of Assignment‐2. Write constructor functions to initialize the data members. Also write copy constructors for all.

8. What is parameterized constructor? How is it useful?

9. Create a program to find the volume of a box. The main() should have the following options:

a. Default Volume of Box (Use 0‐argument constructor and l=b=h=1)

b. User‐defined Volume of Box with single value (Use 1‐argument constructor and l=b=h=n)

c. User‐defined Volume of Box with all values (Use 3‐argument constructor for l, b and h)

d. Exit (Use destructor to print “Bye Bye”)

The Box class should have appropriate getter and setter functions.

10. As soon as a user defines an n‐argument constructor, the system no longer provides the default constructor. Comment