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Helping engineers with technical interviews

Linked list interview question

Three Sum Coding Problem Solution

The Three Sum problem is a well-known problem in computer science that involves finding all unique triplets in an array of integers that add up to a target sum. For example, given the array [1, 2, 3, 4, 5, 6, 7] and a target sum of 10, the solution would be [[1, 2, 7], [1, […]

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Linked list interview question

Longest Palindromic Substring

Longest Palindromic Substring refers to finding the longest contiguous substring in a given string that is a palindrome, which is a sequence of characters that reads the same backward as forward. For example, in the string “babad”, the longest palindromic substring is “bab”, which is a palindrome because it reads the same backward as forward. […]

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Linked list interview question

Container With Most Water

The Container With Most Water is a classic problem in algorithmic and computational thinking, that is often used to test the efficiency and problem-solving skills of developers. The problem statement is as follows: You are given a list of n non-negative integers, where each integer represents a vertical line at position i with a height […]

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Linked list interview question

Median of Two Sorted Arrays

The problem we’re looking at is called “Median of Two Sorted Arrays.” Essentially, we’re given two sorted arrays of integers, and we need to find the median of the combined array (i.e., the middle value when the two arrays are merged together). The twist is that we’re not allowed to actually merge the two arrays […]

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Linked list interview question

Longest Substring Without Repeating Characters

The problem “Longest Substring Without Repeating Characters” is a classic algorithmic problem in computer science. Given a string, the task is to find the length of the longest substring within the string that does not contain any repeated characters. For example, consider the input string “abcabcbb”. The longest substring without repeating characters is “abc”, which […]

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Introduction to Tree Data Structure for Beginners

Introduction to Tree Data Structure for Beginners

A tree is a data structure used in computer science to represent hierarchical relationships between objects. It consists of nodes (or elements) connected by edges, which define the relationships between them. Each node can have zero, one, or multiple child nodes, and the connections between the nodes are referred to as branches. Trees are useful […]

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Linked list interview question

Find the nth Node from the end of a Linked List

The problem of finding the nth node from the end of a linked list involves finding the node that is n positions away from the end of the linked list. For example, if the linked list has 10 nodes and n is 3, we need to find the 3rd node from the end of the […]

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Linked list interview question

Check if a Linked List is a Palindrome

A palindrome is a sequence of characters that is read the same forward and backward. For example, “racecar” is a palindrome. In the context of a linked list, we can consider it a palindrome if the sequence of values in the list is the same when read from left to right and from right to […]

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Linked list interview question

Detect and Remove a Loop in a Linked List

A linked list is a data structure in which each element in the list, known as a node, contains a value and a reference to the next node in the list. Here’s an example of a linked list: In this list, each node contains a value and a reference to the next node in the […]

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Static Code Analysis Tools for Ruby

Best Java Code Review Tools Every Developer Should Know About

In software development, code review is a critical process that helps to improve code quality, reduce errors, and maintain consistency across the codebase. With the growing complexity of modern software systems, reviewing code manually can be a time-consuming and error-prone task. Fortunately, there are several tools available that can automate the code review process and […]

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