A class can contain both of the following method definitions: public int howMany

Question

A class can contain both of the following method definitions:

public int howMany (int numberOfCouples) {

return 2 * numberOfCouples;

}

public double howMany (int numberOfCouples) {

return 2.3 * numberOfCouples;

}

Select one:

True

False

Question 2

A class can contain both of the following method definitions:

public int convertedValue(int number) {

if(number > 0)

return number;

return 0;

}

public int convertedValue(int numberToConvert) {

if(number > 0)

return number;

return 0;

}

Select one:

True

False

Question 3

A class can contain both of the following method definitions:

public int howMany () {

return ( (int) howMany(1));

}

public double howMany (int num) {

return 2.3 * num;

}

Select one:

True

False

Question 4

What is printed when the code snippets below are run?

public class MyClass {

int num;

public MyClass() {

num = 5;

}

public void doSomething(int num) {

System.out.print(this.num);

System.out.print(num);

}

}

// CODE IN A DRIVER PROGRAM:

MyClass myClass = new MyClass();

myClass.doSomething(3);

Select one:

53

none of the above

35

an error will be thrown

Question 5

What happens when "this" is used in a constructor’s body to call another constructor of the same class but the call is not the first statement in the constructor?

For example:

public Student(String name, String id) {

this.id = id;

this(name);

}

Select one:

a runtime error occurs

a compilation error occurs

a logic error occurs

nothing happens- the program compiles and runs

Question 6

A static method can do which of the following? Select all that apply.

Select one or more:

invoke other static methods in the class

invoke non-static methods in the class

reference instance data variables in the class

reference static variables in the class

Question 7

A non-static (instance) method can do which of the following? Select all that apply.

Select one or more:

reference instance data variables in the class

invoke other non-static methods in the class

invoke static methods in the class

reference static variables in the class

Question 8

Based on the following code fragments, which of the following are legal statements? Select all that apply.

public class Bird {

public Bird() {

...

}

public int getFlightSpeed() { ...}

public static int getMaximumFlightSpeed() { ...}

}

Select one or more:

Bird b = new Bird();

Bird b = new Bird();

int n = b.getFlightSpeed();

int n = Bird.getMaximumFlightSpeed();

int n = Bird.getFlightSpeed();

Explanation / Answer

Question 1:

False,because the data type is different but it is not satisfying the method overloading.

Question 4:

53

Queestion 5:

a compilation error occurs

Because constructor call shoukd be the statement in a constructor

Question 6:

Question 7:

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