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?
 package pack;
 public class Result 
 {
 public static void main(String args[])
 {
 StringBuffer strbuf = new StringBuffer("Hello Mania");
 strbuf.insert(6 , "Interview ");
 System.out.println(strbuf);
 }
 }
A. Hello Mania
B. Mania
C. Interview
D. Hello Interview Mania
E. None of these
Answer» E. None of these
Discussion
2.

What is the output of this program?
package pack;
 public class Result 
 {
 public static void main(String args[])
 { 
 StringBuffer strbuf = new StringBuffer("IntervieM");
 strbuf.setCharAt(8, 'W');
 System.out.println(strbuf);
 }
 }

Note : Result.class file is in directory pack;

A. IntervieM
B. Interview
C. IntervieW
D. Inter
E. None of these
Answer» D. Inter
Discussion
3.

What is the output of this program?
package pack;
 class dis
 {
 int p;
 void output() 
 {
 if (p > 1)
 System.out.print(p + " ");
 }
 }
 
 public class packages_Example
 {
 public static void main(String args[]) 
 {
 dis[] array=new dis[5];
 for(int k=0; k<5; k++)
 array[k]=new dis();
 array[0].p = 5; 
 array[1].p = 7;
 array[2].p = 9;
 for (int k = 0; k < 5; ++k)
 array[k].output();
 }
 }

Note : packages_Example.class file is in directory pack;

A. 7 9
B. 5 7 9
C. 7 5 9
D. 9 7 5
E. None of these
Answer» C. 7 5 9
Discussion
4.

What is the output of this program?
import java.lang.reflect.*;
 public class Additional_package_Example 
 { 
 public static void main(String args[]) 
 {
 try
 {
 Class obj = Class.forName("java.awt.Dimension");
 Method methods[] = obj.getMethods();
 for (int k = 0; k < methods.length; k++)
 System.out.println(methods[k]);
 }
 catch (Exception e)
 {
 System.out.print("Exception");
 }
 }
 }
A. Exception
B. Program prints all the constructors of java.awt.Dimension package.
C. program prints all the methods and data member of java.awt.Dimension package.
D. Program prints all the data members of java.awt.Dimension package.
E. Program prints all the methods of java.awt.Dimension package.
Answer» F.
Discussion
5.

What is the output of this program?
import java.lang.reflect.*;
 public class Additional_package_Example
 { 
 public static void main(String args[]) 
 {
 try
 {
 Class object = Class.forName("java.awt.Dimension");
 Field fields[] = object.getFields();
 for (int k = 0; k < fields.length; k++)
 System.out.println(fields[k]);
 }
 catch (Exception e)
 {
 System.out.print("Exception");
 }
 }
 }
A. Program prints all the methods of java.awt.Dimension package
B. Program prints all the constructors of java.awt.Dimension package
C. program prints all the methods and data member of java.awt.Dimension package
D. Program prints all the data members of java.awt.Dimension package
E. None of these
Answer» E. None of these
Discussion
6.

What is the output of this program?
import java.lang.reflect.*;
 public class Additional_packages_Example
 { 
 public static void main(String args[])
 {
 try
 {
 Class object = Class.forName("java.awt.Dimension");
 Constructor constructors[] = object.getConstructors();
 for (int k = 0; k < constructors.length; k++)
 System.out.println(constructors[k]);
 }
 catch (Exception e)
 {
 System.out.print("Exception");
 }
 }
 }
A. Program prints all the possible constructors of class Class
B. Program prints Exception
C. Program prints all the constructors of java.awt.Dimension package
D. Runtime Error
E. Compilation Error
Answer» D. Runtime Error
Discussion
7.

Which of the following is the correct way of importing an entire package pkg ?

A. Import pkg.
B. import pkg.
C. Import pkg.*
D. import pkg.*
E. None of these
Answer» E. None of these
Discussion