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ArrayList is a class

1

True

2

False

Solution:

Extending one class and implementing one more class

1

True

2

False

Solution:

Which keywords are used to define an abstract class

1

abs

2

abstract

3

Abstract

4

None of these

Solution:

Which class is the superclass of all Adapter classes?

1

Applet

2

ComponentEvent

3

Event

4

InputEvent

Solution:

Which of the following methods belongs to the string class

1

length()

2

compareTo()

3

equals()

4

All of them

Solution:

Which of this keyword can be used from preventing overriding of methods?

1

final

2

static

3

private

4

constant

Solution:

Which of these data type is returned by every method of OutputStream?

1

int

2

float

3

byte

4

None of the mentioned

Solution:

Which keyword is used by a class to implement an interface defined previously?

1

import

2

Import

3

implements

4

Implements

Solution:

Which of the following statements contains only unimplemented methods?

1

Class

2

Interface

3

Abstract class

4

None of the above

Solution:

What happens when a class implements two interfaces that define the same variable?

1

Compilation failure

2

Runtime Exception

3

The JVM is not able to identify the correct variable

4

The interfaceName.variableName needs to be defined

Java Questions Set 25:

ArrayList is a class

Solution:

Extending one class and implementing one more class

Solution:

Which keywords are used to define an abstract class

Solution:

Which class is the superclass of all Adapter classes?

Solution:

Which of the following methods belongs to the string class

Solution:

Which of this keyword can be used from preventing overriding of methods?

Solution:

Which of these data type is returned by every method of OutputStream?

Solution:

Which keyword is used by a class to implement an interface defined previously?

Solution:

Which of the following statements contains only unimplemented methods?

Solution:

What happens when a class implements two interfaces that define the same variable?

Solution:

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