CS304 Quiz 2 Set 2

Q1. Why should we write our own assignment operator when dynamic memory is involved?

1. Compiler performs shallow copy
2. Assignment operator is not generated by compiler automatically
3. Overloading is mandatory
4. Deep copy causes errors

Correct answer: Compiler performs shallow copy

Q2. Which of the following is the correct syntax of declaring static variable “count” of type int?

1. int static count;
2. int count static;
3. static int count;
4. static count int;

Correct answer: static int count;

Q3. Which of the following stores the address of a variable?

1. Function
2. Constructor
3. Destructor
4. Pointer

Correct answer: Pointer

Q4. What will be the value of variables a,b, and c after instantiating an object of the given class? class test { int a; int b; int c; public: test():b(5),c(a),a(b){ } };

1. Junk value, 5, Junk value
2. 5, Junk value, 5
3. 5, 5, 5
4. Junk value, 5, 5

Correct answer: Junk value, 5, Junk value

Q5. Why should the return type of the assignment operator be const?

1. To increase memory usage
2. To avoid assignment to subexpressions
3. To increase speed
4. To allow assignment chaining

Correct answer: To avoid assignment to subexpressions

Q6. Which of the following is an example of unary operator?

1. Increment Operator ( ++ )
2. Inequality Operator ( != )
3. Division Operator ( / )
4. Equality Operator ( = =)

Correct answer: Increment Operator ( ++ )

Q7. Which of the following best describes relationship between House and Address classes?

1. Aggregation
2. Composition
3. Inheritance
4. Association

Correct answer: Aggregation

Q8. In composition ____________ are called from composing objects to composed objects.

1. Pointers
2. Constructors
3. Destructors
4. Member Functions

Correct answer: Constructors

Q9. What happens if the assignment operator returns non-const reference?

1. Memory leak occurs
2. Compilation time increases
3. Assignment to subexpressions is allowed
4. Syntax error occurs

Correct answer: Assignment to subexpressions is allowed

Q10. What does return *this; do in an overloaded assignment operator?

1. Returns a reference to the current object
2. Returns a pointer
3. Returns a temporary object
4. Terminates the function

Correct answer: Returns a reference to the current object