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