Java Programming Questions
And Answers
1.Swap two numbers without third variables?
public class Main {
public static void main(String[] args) {
int var1=10;
int var2=20;
System.out.println("value1 = "+var1 + " value2 = "+var2);
var2=var1+var2;
var1=var2-var1;
var2=var2-var1;
System.out.println("value1 = "+var1 + " value2 = "+var2);
}
}
2.Find vowels are available in given string?
public class Main {
public static void main(String[] args) {
String input="hello";
if(checkVowel(input)) {
System.out.println("Vowels are Present");
}else{
System.out.println("Vowels are not Present");
}
}
public static boolean checkVowel(String input){
return input.toLowerCase().matches(".*[aeiou].*");
}
}
3.Print prime numbers within particular range
public class Main {
public static void main(String[] args) {
System.out.println("Prime Numbers Within 100 ");
StringBuilder result = new StringBuilder(" ");
for (int number = 2; number <=100; number++) {
result.append(printPrime(number)? number + " " : "");
}
System.out.print(result);
}
public static boolean printPrime(int n) {
for (int i = 2; i <= n / 2; i++) {
if (n % i == 0) {
return false;
}
}
return true;
}
}
4.Print Odd And Even Numbers
public class Main {
public static void main(String[] args) {
printOddEven(11);
}
public static void printOddEven(int inputNo) {
StringBuilder odd = new StringBuilder();
StringBuilder even = new StringBuilder();
for (int i = 1; i <= inputNo; i++) {
if ((i % 2 == 0)) {
even.append(i).append(" ");
} else {
odd.append(i).append(" ");
}
}
System.out.println("Odd Numbers : " + odd);
System.out.println("Even Numbers : " + even);
}
}
5.Fibonacci Sequence in JAVA
public class Main {
public static void main(String[] args) {
printFiboNo(10);
}
public static void printFiboNo(int inputNo) {
int[] fibo = new int[100];
for (int i = 0; i <= inputNo; i++) {
if (i <= 1) {
fibo[i] = i;
} else {
fibo[i] = fibo[i - 1] + fibo[i - 2];
}
}
for (int j=0;j<inputNo;j++){
System.out.print(fibo[j] + " ");
}
}
}
6.Check given text is palindrome or not
import java.util.Arrays;
public class Main {
public static void main(String[] args) {
System.out.println(checkPalindrome("MADAm")
?"Not Palindrome":"Palindrome");
}
public static boolean checkPalindrome(String inputText) {
int txtlength=inputText.length();
inputText=inputText.toUpperCase();
char chararray[]=inputText.toCharArray();
int temlen=txtlength;
for(int i=0;i<txtlength/2;i++){
if(chararray[i]!=chararray[temlen-1]){
return true;
}
temlen= temlen-1;
}
return false;
}
}
7. Remove Whitespace in String
public class Main {
public static void main(String[] args) {
//** Remove Whitespaces From String ***
String input = " Hai ";
System.out.println("Before Remove Spaces :"+input);
//1.trim
String trimStr=input.trim();
System.out.println("Remove space using trim method *"+trimStr+"*");
//2.strip
String stripStr=input.strip();
System.out.println("Remove space using strip method *"+stripStr+"*");
//3 isWhiteSpace
StringBuilder s=new StringBuilder();
char[] chararr=input.toCharArray();
for(char ch:chararr){
if(!Character.isWhitespace(ch)) s.append(ch);
}
System.out.println("Remove space using isWhiteSpace method *"+s+"*");
// 4.\\s replaceAll
String space=input.replaceAll("\\s","");
System.out.println("Remove space using \\s *"+space+"*");
}
}
8. Number Pyramid and Reverse Pyramid
package ProgrammingQuiz;
public class Main {
public static void main(String[] args) {
int n = 5;
printPattern(n);
}
public static void printPattern(int n)
{
for (int i=n;i>=1; i--){
System.out.println("");
for(int j=i;j>=1;j--){
System.out.print(j);
}
}
for (int i=1;i<=n; i++){
System.out.println("");
for(int j=1;j<=i;j++){
System.out.print(j);
}
}
}
}
Java Script Programming Questions And Answers
1.Swap two numbers without third variables?
function swapvalues(var1 ,var2){
console.log("Before Swap : Value1 = "+ var1 + " Value2 = "+var2);
var2=var1+var2;
var1=var2-var1;
var2=var2-var1;
console.log("After Swap : Value1 = "+ var1 + " Value2 = "+var2);
}
swapvalues(8,7);
2.Find vowels are available in given string?
function checkVowels(input){
let val=input.match(/[aeiou]/gi);
console.log(val);
if(val!= null && val.length>0 ) {
console.log("vowels are present");
}else{
console.log("vowels are not present");
}
}
checkVowels("hai");
3.Print prime numbers within particular range?
function printPrime( n) {
for (let i = 2; i <= n / 2; i++) {
if (n % i == 0) {
return false;
}
}
return true;
}
let result =" ";
for (let number = 2; number <=100; number++) {
result +=printPrime(number) ? number+' ' :'';
}
console.log(result);
4.Print odd and even numbers
function printOddEven(inputNo){
let odd="";
let even="";
let i=1;
while(i<=inputNo){
(i%2==0) ? (even +=i+' ') : (odd +=i+' ') ;
i++;
}
console.log("Odd Numbers : " + odd);
console.log("Even Numbers : " + even);
}
printOddEven(10);
5.Fibonacci Sequence Program Using JS
function fibonacciNo(inputNo){
let fibo=new Array();
for(let i=0;i<=inputNo;i++){
if(i<=1){
fibo[i]=i;
} else{
fibo[i] =fibo[i-1]+fibo[i-2];
}
}
console.log(fibo.toString());
}
fibonacciNo(10);
6. Check Text is Palindrome or not
function checkPalindrome(inputText){
let txtlength=inputText.length;
inputText=inputText.toUpperCase();
let chararray=inputText.split("");
let temlen=txtlength;
for(let i=0;i<txtlength/2;i++){
if(chararray[i]!=chararray[temlen-1]){
return true;
}
temlen= temlen-1;
}
}
console.log(checkPalindrome("MaDaM")
?"Not Palindrome":"Palindrome");
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