Top 10 Free Reverse Phone Lookup Tools to Identify Callers in 2025

Reverse Phone Lookup

Trying to identify an unknown caller or verify the source of a suspicious number? A free reverse phone number lookup can provide you with valuable insights. From caller identification to spam detection, these tools help you trace a phone number and reveal important details about the owner—all without a subscription. In this guide, we’ll dive … Read more

How to Solve the Knuth-Morris-Pratt (KMP) Algorithm Problem in 5 Simple Steps

kmp

The Knuth-Morris-Pratt (KMP) algorithm is a powerful pattern-matching technique often asked in interviews at top companies like Microsoft, Google, and Amazon. This problem is common in coding interviews because it evaluates your understanding of string manipulation and algorithmic optimization. In this article, we’ll explain the KMP algorithm, break it down into manageable steps, and provide … Read more

First Non-Repeating Character in a String: A Complete Guide with Java Solution

First Non-Repeating Character

Introduction Finding the first non-repeating character in a string is a popular coding challenge, often appearing in technical interviews at top companies such as Amazon, Microsoft, and Goldman Sachs. This problem evaluates your understanding of data structures, particularly hashing, and your ability to optimize algorithms. Why is This Problem Important? This problem is frequently asked … Read more

Big Data Explained: Applications, Features, and Benefits in Today’s World

Big Data Explained: Applications, Features, and Benefits in Today’s World

Discover what Big Data is, why it’s essential, how it works, its applications, features, advantages, disadvantages, and the challenges it poses. Perfect for beginners and tech enthusiasts. What is Big Data? Big Data refers to the vast and intricate datasets that surpass the capabilities of traditional data processing methods. It includes structured, unstructured, and semi-structured … Read more

5 Powerful AI-Powered Productivity Tools to Supercharge Your Workflow

Living in the digital era, AI-powered productivity tools have proven invaluable for increasing efficiency and productivity. The right AI tools allow you to automate complex tasks, work smarter, and uncover insights effortlessly. Below, we explore five standout AI-powered productivity tools that will transform your workflow and give you a competitive edge. 1. Outrank: AI for … Read more

5 Proven Steps to Find the Second Largest Element in an Array

Second Largest Element

Finding the second largest element in an array is a common challenge in programming, especially in coding interviews and technical exams. In this guide, we’ll learn how to efficiently solve this problem with Python and explore examples to solidify your understanding. What is the Second Largest Element? The second largest element in an array is … Read more

Stock Buy and Sell Problem: Maximize Your Profit with Multiple Transactions

DSA

Instead, the problem of stock market enthusiasts is usually a variation of profit maximization resulting from the fluctuation in stock prices. One of the key problems in programming regarding this is the “Stock Buy and Sell Problem – Multiple Transactions Allowed” challenge. We will look at the problem statement, its solution, and some tips on … Read more