Explore topic-wise MCQs in Java Programming.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Java Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

What is the output of this program?import java.util.*; class genericstack { Stack object = new Stack (); public void push(E obj) { object.push(obj); } public E pop() { E obj = object.pop(); return obj; } } public class Result { public static void main(String args[]) { genericstack genericstackObj0 = new genericstack(); genericstackObj0.push("Inteview"); System.out.print(genericstackObj0.pop() + " "); genericstack genericstackObj1 = new genericstack(); genericstackObj1.push("Mania"); System.out.println(genericstackObj1.pop()); } }

A. Mania
B. Interview
C. InterviewMnai
D. Inerview Mania
E. None of these
Answer» E. None of these
Discussion
2.

What is the output of this program?import java.util.*; class genericstack { Stack object = new Stack (); public void push(E obj) { object.push(obj); } public E pop() { E obj = object.pop(); return obj; } } public class Output { public static void main(String args[]) { genericstack genericObject = new genericstack(); genericObject.push(50); System.out.println(genericObject.pop()); } }

A. 0
B. 30
C. 50
D. Compilation Error
E. Runtime Error
Answer» D. Compilation Error
Discussion
3.

What is the output of this program?import java.util.*; class genericstack { Stack object = new Stack (); public void push(E obj) { object.push(obj); } public E pop() { E obj = object.pop(); return obj; } } public class Output { public static void main(String args[]) { genericstack genericObject = new genericstack(); genericObject.push(100); System.out.println(genericObject.pop()); } }

A. 10
B. 20
C. 30
D. 40
E. 100
Answer» F.
Discussion
4.

What is the output of this program?import java.util.*; class genericstack { Stack object = new Stack (); public void push(E obj) { object.push(obj); } public E pop() { E obj = object.pop(); return obj; } } public class Output { public static void main(String args[]) { genericstack genericstackObj = new genericstack(); genericstackObj.push("Interview Mania"); System.out.println(genericstackObj.pop()); } }

A. Interview Mania
B. Mania
C. Interviiw
D. Compilation Error
E. Runtime Error
Answer» E. Runtime Error
Discussion
5.

What is the output of this program?import java.util.*; public class Result { public static double sumOfList(List extends Number> list) { double var = 0.0; for (Number num : list) var += num.doubleValue(); return var; } public static void main(String args[]) { List obj = Arrays.asList(4.3, 5.6, 7.8); System.out.println(sumOfList(obj)); } }

A. 17.7
B. 4.3
C. 5.6
D. 7.8
E. None of these
Answer» B. 4.3
Discussion
6.

What is the output of this program?import java.util.*; public class Result { public static double sumOfList(List extends Number> list) { double var = 0.0; for (Number num : list) var += num.doubleValue(); return var; } public static void main(String args[]) { List ListObject = Arrays.asList(10, 20, 30); System.out.println(sumOfList(ListObject)); } }

A. 10
B. 20.0
C. 30.0
D. 50.0
E. 60.0
Answer» F.
Discussion
7.

What is the output of this program?import java.util.*; class genericstack { Stack object = new Stack (); public void push(E obj) { object.push(obj); } public E pop() { E obj = object.pop(); return obj; } } public class Output { public static void main(String args[]) { genericstack genericObj = new genericstack(); genericObj.push("Interview"); System.out.println(genericObj.pop()); } }

A. Interview
B. InterviewMania
C. Interviw Mania
D. Compilation Error
E. Runtime Error
Answer» B. InterviewMania
Discussion