Object oriented concepts UE Past Papers Questions.

State whether each of the following statements is true or false

1. A subclass typically encapsulates less functionality than does its superclass.
2. A superclass typically represents a larger number of objects than its subclass represents.
3. The default case is required in the switch selection structure.
4. The break statement is required in the default case of a switch selection structure.
5. The expression(x>y && a is true if either x>y is true or a is true.
6. The expression containing the || operator is true if either or both of its operands is true.

Answer / Solution

What is the output of the following code assume grade is neither A nor B nor C
Switch(grade){
case`A`:
System.out.println("Great Job!");
break;

case`B`:
System.out.println("Good Job!");
break;

case`C`:
System.out.println("You can do better!");
break;
default:
System.out.println("Consider cheating!");
}

Answer / Solution

Design a Java class named UniversityCircle with two methods that compute and display an area and circumference of a circle.

Answer / Solution

With examples describe the following terms

1. Object oriented programming
2. Dynamic binding
3. Abstraction

Answer / Solution

Differentiate the following terms

• Overloading and overriding
• this and super keywords in java

Answer / Solution