Yearly Archives: 2026
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...
Product of Non-Zero Elements in an Array
Title: Product of Non-Zero Elements in an ArrayIn this guide, you'll learn how to compute the product of all non-zero elements in a Java...
Product of All Elements in an Array
Title: Product of All Elements in an ArrayMultiplying every element of an array into a single result is one of the first useful loops...
Sum of Boundary Elements of a 2D Array
Title: Sum of Boundary Elements of a 2D ArrayIn this guide, you will learn how to compute the sum of the boundary elements of...
Sum of First and Last Element in an Array
Title: Sum of First and Last Element in an ArrayIn this guide, you'll learn how to compute the sum of the first and last...