Monthly Archives: October, 2026
Rearrange Array in Alternating Positive and Negative Order
Title: Rearrange Array in Alternating Positive and Negative OrderUnderstanding the ProblemIn this guide, you'll learn how to rearrange an array of integers so that...
Rearrange Even and Odd Numbers in an Array
Title: Rearrange Even and Odd Numbers in an ArrayRearranging an array so that every even number appears before every odd number is a classic...
Rearrange Positive and Negative Numbers in an Array
Title: Rearrange Positive and Negative Numbers in an ArrayRearranging positive and negative numbers in an array is a classic interview exercise that tests how...
Cyclically Rotate an Array
Title: Cyclically Rotate an ArrayIn this guide, you will learn how to cyclically rotate an array in Java by one position to the right....
Rotate an Array by K Positions (Left and Right)
Title: Rotate an Array by K Positions (Left and Right)Array rotation is one of those small, deceptively simple problems that shows up everywhere, from...
Reverse an Array in Groups of K
Title: Reverse an Array in Groups of KReversing an array in groups of K is a classic interview question that tests two habits at...
Reverse Half of an Array
Title: Reverse Half of an ArrayIn this guide, you'll learn how to reverse the first half of an integer array in place while leaving...
Reverse an Array using Recursion
Title: Reverse an Array using RecursionReversing an array is one of the first problems every Java developer meets, and it is a great place...
Reverse an Array using a Loop
Title: Reverse an Array using a LoopReversing an array is one of the first array manipulations every Java developer meets, and it quietly shows...
Product of Even and Odd Elements in an Array
Title: Product of Even and Odd Elements in an ArrayIn this guide, we will solve a classic beginner-friendly array problem in Java: computing the...