Which of these constructors is used to create an empty String object?
Which of these keywords is used to define interfaces in Java?
What is the output of this program?
1.class A {
2.final public int calculate(int a, int b) { return 1; }
3.}
4.class B extends A {
5.public int calculate(int a, int b) { return 2; }
6.}
7.public class output {
8.public static void main(String args[])
9.{
10.B object = new B();
11.System.out.print("b is b.calculate(0, 1));
12.}
13.}
Which of the following method of Process class can terminate a process?
What is the output of this program?
1.class output {
2.public static void main(String args[])
3.{
4.StringBuffer s1 = new StringBuffer("Hello");
5.StringBuffer s2 = s1.reverse();
6.System.out.println(s2);
7.}
8.}
What is the output of this program?
1.class array_output {
2.public static void main(String args[])
3.{
4.int array_variable[][] = {{ 1, 2, 3}, { 4 , 5, 6}, { 7, 8, 9}};
5.int sum = 0;
6.for (int i = 0; i < 3; ++i)
7.for (int j = 0; j < 3 ; ++j)
8.sum = sum + array_variable[i][j];
9.System.out.print(sum / 5);
10.}
11.}
A class member declared protected becomes member of subclass of which type?
Which of these method of Array class is used sort an array or its subset?
What is the prototype of the default constructor of this class? public class prototype { }
Which of the following statement is correct?
Which of these methods can be used to obtain a static array from an ArrayList object?
What is the output of this program?
1.class jump_statments {
2.public static void main(String args[])
3.{
4.int x = 2;
5.int y = 0;
6.for ( ; y < 10; ++y) {
7.if (y % x == 0)
8.continue;
9.else if (y == 8)
10.break;
11.else
12.System.out.print(y + " ");
13.}
14.}
15.}
What is the output of this program?
1.class binary {
2.public static void main(String args[]) {
3.int num = 17;
4.System.out.print(Integer.toBinaryString(num));
5.}
6.}
Which of these method of class String is used to extract more than one character at a time a String object?
Which of these operators is used to allocate memory to array variable in Java?
Which of these methods is used to check for infinitely large and small values?
Which of these can be used to fully abstract a class from its implementation?
What is the output of this program?
1.class output {
2.public static void main(String args[])
3.{
4.String s1 = "Hello";
5.String s2 = s1.replace('l','w');
6.System.out.println(s2);
7.}
8.}
What is the output of this program?
1.import java.util.*;
2.class Linkedlist {
3.public static void main(String args[]) {
4.LinkedList obj = new LinkedList();
5.obj.add("A");
6.obj.add("B");
7.obj.add("C");
8.obj.addFirst("D");
9.System.out.println(obj);
10.}
11.}
-
-
-
-
Which of the following method of Process class can terminate a process?
What is the output of this program? 1.class average {
2.public static void 3.main(String args[])
3.{
4.double num[] = {5.5, 10.1, 11, 12.8, 56.9, 2.5};
5.double result;
6.result = 0;
7.for (int i = 0; i < 6; ++i)
8.result = result + num[i];
9.System.out.print(result/6);
10.}
11. }
What is the output of this program? 1.class Output {
2.public static void main(String args[])
3.{
4.boolean a = true;
5.boolean b = false;
6.boolean c = a ^ b;
7.System.out.println(!c);
8.}
9.}
What is the output of this program?
1.import java.util.*;
2.class stack {
3.public static void main(String args[]) {
4.Stack obj = new Stack();
5.obj.push(new Integer(3));
6.obj.push(new Integer(2));
7.obj.pop();
8.obj.push(new Integer(5));
9.System.out.println(obj);
10.}
11.}
What is the output of this program?
1. import java.net.*;
2.class networking {
3.public static void main(String[] args) throws Exception {
4.URL obj = new URL("http://www.sanfoundry.com/javamcq");
5.URLConnection obj1 = obj.openConnection();
6.System.out.print(obj1.getContentType());
7.}
8.}
Note: Host URL is written in html and simple text.
What is the output of this program?
1.class output {
2.public static void main(String args[])
3.{
4.String s1 = "Hello";
5.String s2 = new String(s1);
6.String s3 = "HELLO";
7.System.out.println(s1.equals(s2) + " " + s2.equals(s3));
8.}
9.}
What is the output of this program?
1.import java.io.*;
2.class files {
3.public static void main(String args[]) {
4.File obj = new File("/java/system");
5.System.out.print(obj.canWrite());
6.System.out.print(" " + obj.canRead());
7.}
8.} Note: file is made in c drive.
What is the output of this program?
1.import java.util.*;
2.class Output {
3.public static void main(String args[]) {
4.ArrayList obj = new ArrayList();
5.obj.add("A");
6.obj.ensureCapacity(3); 7.System.out.println(obj.size());
8.}
9.}
Which of these data type value is returned by equals() method of String class?
What is the output of this program?
1.class string_class {
2.public static void main(String args[])
3.{
4.String obj = "I LIKE JAVA";
5.System.out.println(obj.length());
6.}
7.}
What is the output of this program?
1.class operators {
2.public static void main(String args[])
3.{
4.int var1 = 5;
5.int var2 = 6;
6.int var3;
7.var3 = ++ var2 * var1 / var2 + var2;
8.System.out.print(var3);
9.}
10.}
Which of these statement is incorrect?
What is the output of this program?
1.import java.util.*;
2.class Maps {
3. public static void main(String args[]) {
4.HashMap obj = new HashMap(); 5.obj.put("A", new Integer(1));
6.obj.put("B", new Integer(2));
7.obj.put("C", new Integer(3)); 8.System.out.println(obj.keySet());
9.}
10.}
Which of these class is used for operating on request from the client to the server?
Which of these method of class StringBuffer is used to find the length of current character sequence?
What is the error in this code? byte b = 50; b = b * 50;
Which of these keyword can be used in subclass to call the constructor of superclass?
What is the output of this program?
1.class Output {
2.public static void main(String args[]) {
3.Integer i = new Integer(257);
4.byte x = i.byteValue();
5.System.out.print(x);
6.}
7.}
Which of these class holds a collection of static methods and variables?
What is the output of this program?
1.import java.util.*;
2.class date {
3.public static void main(String args[]) {
4.Date obj = new Date();
5.System.out.print(obj);
6.}
7.}
Which of these are selection statements in Java?