Java Programming Practice MCQs Codetantra. CBT-2
L1 to L31
01. Given a sequence of 10 digits as String
String text = "4174163964";
What is the output of the below code snippet:
if (text.length() > 10) {
text = text.substring(3, 6) + text.substring(2, 5);
System.out.println(text);
} else {
System.out.println(text);
}
02. Select the correct output:
public class Main {
public static void main(String args[]) {
String str = "72418";
String[] arr1 = str.split("2");
String[] arr2 = str.split("1");
for (String s : arr1)
System.out.println(s);
for (String s : arr2)
System.out.println(s);
}
import java.util.*;
import java.lang.*;
public class Main{
public static void main(String[] args) {
int Info = 90; // Line 1
String S = Integer.toString(Info); //Line 2
String Temp = "19"; // Line 3
int Data = Integer.parseInt(Temp); //Line 4
System.out.println(Data + S);//Line 5
}
}
03. What is the output?
public class Pass {
public static void main(String[] args) {
int x = 251;
Pass p = new Pass();
p.doStuff(x);
System.out.print(" main x = " + x);
}
void doStuff(int x) {
System.out.print(" doStuff x = " + x++);
}
}
04. What is the result ?
public class Batman {
int squares = 547;
public static void main(String[] args) {
new Batman().go();
}
void go() {
incr(++squares);
System.out.println(squares);
}
void incr(int squares) {
squares += 10;
}
}
05. What is the result?
06. What will be the result of the expression a % b when a and b is of type int and their values are
a = 1114 and b= 200 ?
public class TestString1 {
public static void main(String[] args) {
String str = "137";
str += 205;
System.out.print(str);
}
}
07. What is the output?
public class Test {
public static void main(String[] args) {
int a = 23;
System.out.print(doCalc(a));
System.out.print(" " + a);
}
static int doCalc(int a) {
a = a * 55;
return a;
}
}
08.What is the result?public class Main {
public static void main(String[] args){
int a = 6;
System.out.println(a++++);
}
}
09. What is the output?
Given the code fragment :
public static void main(String[] args) {
Short s1 = 5;
Integer s2 = 2;
Long s3 = (long) (s1 + s2); // line n1
String s4 = (String) (s3 * s2); // line n2
System.out.println("Sum is " + s4);
}
10.what is the result ?
Given: the code fragment:
public class Test {
public static void main(String[] args) {
int[] array = new int[2];
array[0] = 42;
array[1] = 7;
System.out.println(array[0] + array[1]);
}
}
11. What is the result?
Consider the following code:
int x,y,z; y=99; z=63; X=0-(++y)+z++;
12. What will be the values of X, y and z
13. Choose the correct answer for the expression:
boolean status = ((9104/55)>197) || ((8391/48)>125);
Note: In output 0 is false and 1 is treated as true
public class Test {
public static void main(String[] args) {
int a = 5 + 5 * 3 + 3 * 3 + (3 * 8);
System.out.println(a);
}
}
14. What is the output?
public class Test {
public static void main(String[] args){
int a = 20;
System.out.println(a--*a--);
}
}
15. What is the output?
16. You are given an array arr of elements is given = 462,398,234,169,6 .
What are the steps of insertions done while performing insertion sort in the array?
Note: Order of sorting is in ascending order.
public class Main {
public static void main(String[] args) {
double Data = 663.46;
int Info = Data;
System.out.println(Data);
}
}
17. What is the output of above given code snippet?
public class Solution {
public static void main(String args[])
{
int a = 15;
System.out.print(++a * 47);
}
}
18. What is the output
Given:
class Test {
static int i;
int j;
public static void main(String[] args) {
Test x1 = new Test();
Test x2 = new Test();
x1.i = 30;
x1.j = 94;
x2.i = 58;
x2.j = 23;
System.out.println(x1.i + " " + x1.j + " " + x2.i + " " + x2.j);
}
}
19. What is the result?
20.
public class Test
{
public static void main(String args[])
{
int arr[] = {82, 50, 18, 76, 43};
for ( int i = 0; i < arr.length - 2; ++i)
System.out.print(arr[i] + " ");
}
}21.
int nums1[] = new int[3];
int nums2[] = {6, 2, 8, 5, 2};
nums1 = nums2;
for (int x : nums1) {
System.out.print(x + ":");
}
22. What will be the output of below given code snippet?
public class Question {
public static void main (String [ ] args) {
int var = 69, anotherVar = 33, result ;
String str = "97" ;
String anotherStr = "62" ;
result = var*anotherVar / anotherVar ;
if ( result < 13 ) {
System.out.println(str) ;
}
else {
System.out.println(anotherStr) ;
}
}
}
23.
int[] intArr = {36, 94, 62, 30, 87};
intArr[2] = intArr[4];
intArr[4] = 55;
What are the values of each element in intArr after this code has executed?
24.
public class Main {
public static void main(String[] args){
int a = 19;
System.out.println(++a*++a);
}
}
What is the output?
25. What will be the output of below given code snippet?
public class Main {
public static void main (String args[]) {
int x = 0;
if (x) {
System.out.println ("58");
}
else {
System.out.println ("22");
}
}
}
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