Explore topic-wise MCQs in Java Programming.

This section includes 56 Mcqs, each offering curated multiple-choice questions to sharpen your Java Programming knowledge and support exam preparation. Choose a topic below to get started.

51.

A method which is declared as abstract and does not have implementation is known as an _____________?

A. Abstract Interface
B. Abstract Thread
C. Abstract List
D. abstract Method
Answer» E.
Discussion
52.

A class which is declared with the ________ keyword is known as an abstract class in Java.

A. abstract
B. util
C. extends
D. None of the above
Answer» B. util
Discussion
53.

Abstract class can have constructors and static methods?

A. True
B. False
C. Abstract class can have constructors but can not have static methods.
D. Abstract class can not have constructors but can have static methods.
Answer» B. False
Discussion
54.

An abstract class can have a data member, abstract method, method body (non-abstract method), constructor, and even main() method.

A. True
B. False
C. May be True or False
D. Can't Say
Answer» B. False
Discussion
55.

What will be output for the folllowing code?

A. Compilation error in Line 1(abstract method cannot be private)
B. Compilation error in Line 2(abstract class cannot have concrete method)
C. Compilation error in Line 3(abstract class cannot be extended)
D. Compilation error in Line 4(deposit method should have public access modifier)
Answer» B. Compilation error in Line 2(abstract class cannot have concrete method)
Discussion
56.

What is the stored in the object obj in following lines of code?box obj;

A. Memory address of allocated memory of object
B.
C. Any arbitrary pointer
D. Garbage
Answer» C. Any arbitrary pointer
Discussion