2000+ Java Questions - Set 269 [With Solutions]

Java Questions Set 269:

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Java Questions

Set 269/274

DataInputStream is a subtype of FilterInputStream

True

False

The default serialization process can be overridden.

True

False

What is the default layout in Java?

CardLayout

BorderLayout

FlowLayout

GridLayout

Which of these constructors is used to create an empty String object?

String()

String(void)

String(0)

None of the mentioned

What is the numeric range for the char data type in Java?

-32,768 to 32,767

-128 to 127

-2,147,483,648 to 2,147,483,647

0 to 65,535

How can you create a thread in Java?

Extending the Thread class

Implementing the Runnable interface

Both (1) and (2)

Neither (1) nor (2)

Which exception is thrown by the `compareTo()` method defined in a `Double` wrapper class?

IOException

SystemException

CastException

ClassCastException

Which Java classes are used for input and output operations when working with bytes?

InputStream and OutputStream

All of the mentioned

Reader and Writer

Which of the following statements about arrays in Java is false?

A Java Array is always an object.

Every array type implements the interfaces Cloneable and java.io.Serializable.

Arrays in Java are always allocated on the heap.

The length of an array can be changed after creation.

What is the purpose of the finally block in Java?

can be used with class method and variable

cannot be instantiated, a final method cannot be overridden and a final variable cannot be reassigned

is used just before an object is destroyed and can be called just prior to object creation

is used to execute the important code of the program, and it is executed whether an exception is handled or not

Quiz Mode

Qn. Sets

Java Questions Set 269:

Java Questions

DataInputStream is a subtype of FilterInputStream

Reveal Answer

Reveal Answer

The default serialization process can be overridden.

Reveal Answer

Reveal Answer

What is the default layout in Java?

Reveal Answer

Reveal Answer

Which of these constructors is used to create an empty String object?

Reveal Answer

Reveal Answer

What is the numeric range for the char data type in Java?

Reveal Answer

Reveal Answer

How can you create a thread in Java?

Reveal Answer

Reveal Answer

Which exception is thrown by the compareTo() method defined in a Double wrapper class?

Reveal Answer

Reveal Answer

Which Java classes are used for input and output operations when working with bytes?

Reveal Answer

Reveal Answer

Which of the following statements about arrays in Java is false?

Reveal Answer

Reveal Answer

What is the purpose of the finally block in Java?

Reveal Answer

Reveal Answer

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Which exception is thrown by the `compareTo()` method defined in a `Double` wrapper class?