Lakhveer Singh Rajput Blog's: 🌟 Insights on Tech, Coding, and Personal Growth 🚀💡

🚀 Algorithms That Can Save Your Job Interviews 💼✨ When you walk into a coding interview, the first thing on your mind is: “Which problems will they ask me to solve?” 🤔  Well, the truth is — most interviews revolve around a set of core algorithms that every developer should master. These algorithms are not just about passing interviews; they power real-world systems from search engines to AI. In this blog, we’ll dive into must-know algorithms 🧠, explain them with examples, show where to use them, and then wrap up with additional algorithms that are also commonly asked. 1️⃣ Binary Search 🔍 — The Fastest Way to Find Things What it is:  Binary Search is used to find an element in a sorted list/array efficiently. Instead of checking every element, it keeps dividing the search range into half. Example:  Let’s say we have a sorted array: [2, 5, 8, 12, 16, 23, 38, 56, 72, 91] We want to find 23 . Step 1: Check the middle element → 16 . Since 23 > 16 , search the right...

🚀 Mastering AWS EC2: Your Gateway to Scalable Cloud Applications When it comes to deploying applications on the cloud , one service stands out as the backbone of Amazon Web Services —  Amazon Elastic Compute Cloud (EC2) . Whether you’re a beginner developer or an enterprise architect, understanding EC2 is essential to scale, secure, and optimize your applications. 🌐 In this blog, we’ll dive into: 🔑 Core Features of AWS EC2 💡 An Example Use Case 🛠️ Step-by-Step Implementation Guide ⚙️ How to Configure EC2 for Your Application Needs 🌟 What is AWS EC2? Amazon EC2 is a web service that provides resizable compute capacity in the cloud . In simple terms, it’s like renting a virtual server where you can run your applications without worrying about physical infrastructure. 🔑 Key Features of AWS EC2 1. Scalability & Elasticity 🏗️ Quickly scale your application up or down using Auto Scaling Groups . Perfect for handling unpredictable workloads. 2. Wide Range of Instance Types ?...

🌟 Achieve Your Full Potential: Unlocking the Psychology of Growth 🚀 Every human being is born with infinite possibilities , but very few truly unlock their full potential . Why? Because most of us let fear, habits, and self-doubt hold us back. Psychology provides us with powerful principles and techniques to break free from these barriers. In this blog, we’ll explore scientifically proven concepts , real-life examples , and timeless quotes that can help you maximize your potential. Let’s dive in! 💡 🧠 1. Growth Mindset — Believe in Progress 👉 Coined by Dr. Carol Dweck , the Growth Mindset is the belief that abilities and intelligence can be developed with effort and persistence. Fixed Mindset : “I’m not good at math; I’ll never be.” Growth Mindset : “I’m not good at math yet , but with practice, I’ll improve.” ✅ Example: Thomas Edison failed 1,000+ times before inventing the light bulb. Instead of quitting, he said: “I have not failed. I’ve just found 10,000 ways that won’t...

🚀 Setting an Automated Pipeline: A Step-by-Step Guide  🛠️ In today’s fast-paced development world, automation is the key to delivering high-quality software faster and with fewer errors. An automated pipeline ensures that code goes through continuous integration (CI) and continuous delivery (CD) smoothly, without manual intervention. In this blog, we’ll explore essential tools, their features, and step-by-step instructions to set up an automated pipeline with test case execution and Rubocop code checks . ✅ 🔑 What is an Automated Pipeline? An automated pipeline is a set of processes that take your code from development to production in an automated manner. It typically includes stages like: Code build 🏗️ Automated testing 🧪 Static code analysis 🔍 Deployment 🚢 This reduces manual errors and keeps the development cycle consistent. 🛠️ Tools for Automated Pipelines 1. Jenkins 🤖 Features: Open-source automation server Supports plugins for almost any tool Highly custom...

⚡ Be The Master of SQL Queries with These Tricks & Hacks 🚀 SQL is the heart of every database-driven application. Whether you’re building a Ruby on Rails app, a large-scale enterprise system, or crunching analytics data — mastering SQL queries can make your work faster, smarter, and more efficient . In this blog, we’ll explore powerful SQL tricks and hacks with deep explanations and examples , plus bonus tips for query optimization . Let’s dive in! 🏊‍♂️ 🔑 1. Always Select Only What You Need Bad Practice: SELECT * FROM customers; 👉 This fetches every column, even if you only need a few. Optimized Query: SELECT id, name, email FROM customers; ✅ Saves memory & bandwidth ✅ Improves query speed 🧩 2. Use Aliases for Readability Aliases make queries short, clean, and professional . SELECT c.name, o.amount FROM customers AS c JOIN orders AS o ON c.id = o.customer_id; 👉 Easier to read than writing full table names repeatedly. 📊 3. Use Joins Instead of Subqueries...

🚀 Ruby on Rails Design Patterns You Must Know for Clean & Scalable Code When working with Ruby on Rails (RoR) , developers often face challenges like keeping code clean, avoiding repetition, and managing complexity as applications grow. That’s where Design Patterns step in 👨‍💻. Design Patterns are proven solutions to common problems in software development. They don’t reinvent the wheel but guide us toward structured, reusable, and maintainable code. In this blog, we’ll dive deep into Rails-specific design patterns , their use cases, and real examples. 1️⃣ Service Object Pattern 💼 📌 Problem: Your controllers or models are doing too much — business logic is scattered everywhere. 📌 Solution: Extract business logic into Service Objects . This makes controllers thinner and models focused only on persistence. ✅ Example: # app/services/user_signup_service.rb class UserSignupService def initialize ( user_params ) @user_params = user_params end def call user =...

🌱 Habits: Remove the Wrong Ones & Begin the Right Ones 🚀 Habits shape our destiny. They decide whether we move closer to success or drift away from it. The beauty of habits lies in their invisible power  — they control our thoughts, behaviors, and even emotions without us realizing it. But the question is: How do we remove harmful habits and replace them with powerful, growth-oriented ones? 💡 Let’s dive deep into the psychology of habits , how to build them, break them, and stay consistent. 🔍 Step 1: Identifying Good & Bad Habits The first step is awareness. Many people live on autopilot, not realizing which habits are pulling them backward. Here are psychological cues to identify them: Trigger Awareness : Every habit starts with a cue (stress, boredom, time of day). Observe what prompts your habit. Reward Analysis : Ask yourself, “What am I getting out of this?” (e.g., smoking = stress relief, scrolling = dopamine hits). Energy Check : Good habits give you energy, ba...

🚀 Microservices Architecture in Depth: Concepts, Features, Tools & Setup Guide In today’s fast-paced world, scalability, agility, and resilience are must-haves for modern applications. That’s where Microservices Architecture comes in — a revolutionary way of building software systems that power giants like Netflix, Amazon, and Uber. Let’s dive deep into this powerful concept, understand its features, explore the tools, and even go through a setup guide with examples. 🌟 🔍 What is Microservices Architecture? Microservices Architecture is an approach to designing applications as a collection of small, loosely coupled, independently deployable services . 👉 Each microservice runs its own process, communicates with others via APIs (usually HTTP/REST or gRPC), and has its own database . For example: In an E-commerce app , the system might have separate services like: 🛒 Cart Service 👤 User Service 💳 Payment Service 📦 Order Service Each service can be built, deployed, and sca...