Master DSA Topics - January, 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
121 Armstrong Number Easy
Math
122 Arrange Table by Gender Medium
Database
123 Arranging Coins Easy
MathBinary Search
124 Array Nesting Medium
ArrayDepth-First Search
125 Array of Doubled Pairs Medium
ArrayHash TableGreedy
126 Array of Objects to Matrix Hard
JavaScript
127 Array Partition Easy
ArrayGreedySorting
128 Array Prototype ForEach Easy
JavaScript
129 Array Prototype Last Easy
JavaScript
130 Array Reduce Transformation Easy
JavaScript
131 Array Transformation Easy
ArraySimulation
132 Array Upper Bound Easy
JavaScript
133 Array With Elements Not Equal to Average of Neighbors Medium
ArrayGreedySorting
134 Array Wrapper Easy
JavaScript
135 Article Views I Easy
Database
Showing 121-135 of 3600
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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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