Master DSA Topics - April, 2026

Practice problems across 75+ categories

All Coding Problems

Practice coding problems across all companies and topics 3600 problems | 879 Easy | 1856 Medium | 842 Hard

# Problem Difficulty Topics
496 Continuous Subarray Sum Medium
ArrayHash TableMath
497 Continuous Subarrays Medium
ArrayQueueSliding Window
498 Convert 1D Array Into 2D Array Easy
ArrayMatrixSimulation
499 Convert a Number to Hexadecimal Easy
MathStringBit Manipulation
500 Convert an Array Into a 2D Array With Conditions Medium
ArrayHash Table
501 Convert Binary Number in a Linked List to Integer Easy
Linked ListMath
502 Convert Binary Search Tree to Sorted Doubly Linked List Medium
Linked ListStackTree
503 Convert BST to Greater Tree Medium
TreeDepth-First SearchBinary Search Tree
504 Convert Callback Based Function to Promise Based Function Medium
JavaScript
505 Convert Date Format Easy
Database
506 Convert Date to Binary Easy
MathString
507 Convert Doubly Linked List to Array I Easy
ArrayLinked ListDoubly-Linked List
508 Convert Doubly Linked List to Array II Medium
ArrayLinked ListDoubly-Linked List
509 Convert Integer to the Sum of Two No-Zero Integers Easy
Math
510 Convert JSON String to Object Hard
JavaScript
Showing 496-510 of 3911
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public class MyFirstJavaProgram { Edit & Run

   /* This is my first java program.
    * This will print 'Hello, World!' as the output
    */

   public static void main(String []args) {
      System.out.println("Hello, World!"); // prints
   }
}

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