Which of these method of ArrayList class is used to obtain present size of an object?
Which of these methods of httpd class is used to read data from the stream?
What is the output of this program?
1.import java.util.*;
2.class Maps {
3.public static void main(String args[]) { 4.TreeMap obj = new TreeMap();
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.entrySet());
9.}
10.}
What is the output of this program?
1.class A {
2.int i;
3.int j;
4.A() {
5.i = 1;
6.j = 2;
7.}
8.}
9.class Output {
10.public static void main(String args[])
11.{
12.A obj1 = new A();
13.System.out.print(obj1.toString());
14.}
15.}
Which of these methods can be used to convert all characters in a String into a character array?
What is the value returned by function compareTo() if the invoking string is greater than the string compared?
What is the output of this program?
1.class overload {
2.int x;
3.int y;
4.void add(int a){
5.x = a + 1;
6.}
7.void add(int a , int b){
8.x = a + 2;
9.}
10.}
11.class Overload_methods {
12.public static void main(String args[])
13.{
14.overload obj = new overload();
15.int a = 0;
16.obj.add(6, 7);
17.System.out.println(obj.x);
18.}
19.}
What is the output of this program? 1.class string_class {
2.public static void main(String args[])
3.{
4.String obj = "hello";
5.String obj1 = "world";
6.String obj2 = obj;
7.obj2 = " world";
8.System.out.println(obj + " " + obj2);
9.}
10}
Which of these statement is incorrect?
Which of these methods is used to check for infinitely large and small values?
At line number 2 below, choose 3 valid data-type attributes/qualifiers among “final, static, native, public, private, abstract, protected”
public interface Status
{
/* insert qualifier here */ int MY_VALUE = 10;
}
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.int len = obj1.getContentLength();
7.System.out.print(len);
8.}
9.}
What is the output of this program?
1.class main_class {
2.public static void main(String args[])
3.{
4.int x = 9;
5.if (x == 9) {
6.int x = 8;
7.System.out.println(x);
8.}
9.}
10.}
What is the output of this program, if we run as “java main_arguments 1 2 3”? 1.class main_arguments {
2.public static void main(String [] args)
3. {
4.String [][] argument = new String[2][2];
5.int x;
6.argument[0] = args;
7.x = argument[0].length;
8.for (int y = 0; y < x; y++)
9.System.out.print(" " + argument[0][y]);
10.}
11.}
Which of these access specifier must be used for class so that it can be inherited by another sub class?
Which of these is an on correct statement?
Which of these keyword can be used in subclass to call the constructor of superclass?
Which of these method is called when http daemon is acting like a normal web server?
What is the output of this program?
1.class Output {
2.public static void main(String args[]) {
3.Long i = new Long(256);
4.System.out.print(i.hashCode());
5.}
6.}
Which of these operators is used to allocate memory for an object?
Which of these tranfer protocol must be used so that URL can be accessed by URLConnection class object?
What is the output of this program?
final class A {
1.int i;
2.}
3.class B extends A {
4.int j;
5.System.out.println(j + " " + i);
6.}
7.class inheritance {
8.public static void 9.main(String args[])
10.{
11.B obj = new B();
12.obj.display();
13.}
14.}
What is the output of this program?
1.package pkg;
2.class output {
3.public static void main(String args[])
4.{
5.StringBuffer s1 = new StringBuffer("Hello");
6.s1.setCharAt(1, x);
7.System.out.println(s1);
8.}
9.}
Which of these data type value is returned by equals() method of String class?
Which of these class must be used to send a datatgram packets over a connection?
What is the output of this program? 1.class multidimention_array {
2.public static void main(String args[])
3.{
4.int arr[][] = new int[3][];
5.arr[0] = new int[1];
6.arr[1] = new int[2];
7.arr[2] = new int[3];
8.int sum = 0;
9.for (int i = 0; i < 3; ++i)
10.for (int j = 0; j < i + 1; ++j)
11.arr[i][j] = j + 1;
12.for (int i = 0; i < 3; ++i)
13. for (int j = 0; j < i + 1; ++j)
14.sum + = arr[i][j];
15.System.out.print(sum);
16.}
17.}
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.removeFirst();
9.System.out.println(obj);
10.}
11. }
What is the output of this program?
1.import java.util.*;
2.class Array {
3.public static void main(String args[]) {
4.int array[] = new int [5];
5.for (int i = 5; i > 0; i--)
6.array[5-i] = i;
7.Arrays.fill(array, 1, 4, 8);
8.for (int i = 0; i < 5 ; i++)
9.System.out.print(array[i]);
10.}
11.}
What is the output of this program?
1.class output {
2.public static void main(String args[])
3.{
4.String c = "Hello i love java";
5.boolean var;
6.var = c.startsWith("hello");
7.System.out.println(var);
8.}
9.}
Which of these method Map class is used to obtain an element in the map having specified key?
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.}
Which of these method of HashSet class is used to add elements to its object?
Which of the following are legal lines of Java code? 1. int w = (int)888.8; 2.byte x = (byte)100L; 3.long y = (byte)100; 4.byte z = (byte)100L;
What is the output of this program?
1.class Output {
2.public static void main(String args[])
3.{
4.final int a=10,b=20;
5.while(a
Which of these method of class StringBuffer is used to extract a substring from a String object?
Which of the following statements are incorrect?
Which of these method of String class is used to obtain character at specified index?
What is the output of this program? 1.class string_demo {
2.public static void main(String args[])
3.{
4.String obj = "I" + "like" + "Java";
5.System.out.println(obj);
6.}
7.}
Which of these method of InputStream is used to read integer representation of next available byte input?
What is the output of this program?
1.abstract class A {
2.int i;
3.abstract void display();
4.}
5.class B extends A {
6.int j;
7.void display() {
8.System.out.println(j);
9.}
10.}
11.class Abstract_demo {
12. public static void main(String args[])
13.{
14.B obj = new B();
15.obj.j=2;
16.obj.display();
17.}
18.}