import java.io.*;
import java.util.Scanner;

public class NumerSmallerThanCurrentNumber {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.println("Enter the size of array : ");
int n = scanner.nextInt();


//Declaring the array
int arr[] = new int[n];

System.out.println("Enter the array elements : ");

for(int i=0;i<n;i++) {
arr[i] = scanner.nextInt();
}

System.out.println("The Entered elements are : ");
for(int i=0;i<n;i++) {
System.out.print(arr[i] + " ");
}

int listOfElements[] = countSmallerNumber(arr);

System.out.println("\nThe list of numbers smaller than current number : ");

for(int i=0;i<listOfElements.length;i++) {

System.out.print(listOfElements[i]+" ");
}
}

//Function for count the smaller element than the current element
private static int[] countSmallerNumber(int[] arr) {

//Take a array for storing the the count of smaller element than the current element
int countNumber[] = new int[arr.length];

for(int i=0;i<arr.length;i++) {

int count=0;

for(int j=0;j<arr.length;j++) {

//Compare current elements with other elements
if((arr[i]>arr[j]) && (i!=j)) {

//Increase the count, if other element is smaller than the current element
count++;
}
}
countNumber[i]=count;
}

return countNumber;
}
}

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HashMap<Integer,Integer> m= new HashMap<>();
int[] nums1= nums.clone();
Arrays.sort(nums);
int[] result= new int[nums.length];
for(int i=0;i<nums.length;i++){
if(!m.containsKey(nums[i])){
m.put(nums[i],m.getOrDefault(nums[i],i));
}
}
for(int j=0;j<nums.length;j++){
result[j]=m.get(nums1[j]);
}

return result;
}

import java.util.*;
class HelloWorld {
public static void main(String[] args) {
List<Integer> inp = Arrays.asList(8, 1, 2, 2, 3);
List<Integer> al = Arrays.asList(8, 1, 2, 2, 3);
Collections.sort(al);
Map<Integer, Integer> o = new HashMap<>();
List<Integer> res = new ArrayList<>();
for(int i = 0; i < al.size(); i++){
if (i != 0 && al.get(i) == al.get(i-1)) {
o.put(al.get(i), i-1);
} else {
o.put(al.get(i), i);
}
}
for(int i = 0; i < inp.size(); i++) {
res.add(o.get(inp.get(i)));
}

System.out.println(res.toString());
}
}

// Online Java Compiler
// Use this editor to write, compile and run your Java code online
import java.util.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.stream.Collectors;
class HelloWorld {
public static void main(String[] args) {
//List<Integer> al = Arrays.asList(8, 1, 2, 2, 3);
int[] l = new int[5];
int[] o = new int[5];
l[0] = 8;
l[1] = 1;
l[2] = 2;
l[3] = 2;
l[4] = 3;

for(int i = 0;i<l.length;i++){
int count = 0;
for(int j = 0; j < l.length; j++){
if(l[i] > l[j]){
count++;
}
}
o[i] = count;
}
ArrayList<Integer> integerArray = (ArrayList<Integer>) Arrays.stream(o).boxed().collect(Collectors.toList());
System.out.println(integerArray.toString());
for(int i = 0;i<l.length;i++){
System.out.println(o[i]);
}
}
}

// Online Java Compiler
// Use this editor to write, compile and run your Java code online
import java.util.*;
class HelloWorld {
public static void main(String[] args) {
List<Integer> i1 = Arrays.asList(2, 4, 3);
List<Integer> i2 = Arrays.asList(5, 6, 4);
List<Integer> o = new ArrayList<>();
int d = 0;
for(int i = 0; i < i1.size(); i++){
int x = i1.get(i) + i2.get(i);
if (x > 9) {
d = x/10;
int r = x%10;
x = d>0 ? r : x;
} else {
x = d>0 ? (x + d) : x;
}

o.add(x);
}
System.out.println(o.toString());
}
}

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I hope you all completed these questions

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1. Object Oriented Programming (OOP)
2. General Questions about Java
3. Java Threads
4. Java Collections
5. Garbage Collectors
6. Exception Handling
7. Java Applets
8. Swing
9. JDBC
10. Remote Method Invocation (RMI)
11. Servlets
12. JSP

I found it really amazing and useful for Java interview preparation, so sharing with you all.

Thanks to Stathis Maneas for this wonderful and concise doc.

Save it for the future reference and share it with the needy ones.