Blog
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Roles vs Policies in AWS IAM: A Clear-Cut Breakdown
AWS IAM Roles & Policies: How ChatGPT Helped Me Understand AWS IAM Roles & Policies: How ChatGPT Helped Me Understand I interacted with ChatGPT, and here’s how it cleared my whole doubt about IAM hierarchy: User: “So this is hierarchy Ec2->Role->Policy User~>Role->Policy” Assistant: “Exactly! You’re almost there — let’s lay it out cleanly …” (explained…
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How Do You Work With Offshore Teams?
(Real Lessons Beyond Interview Answers) “How do you work with offshore teams?” It’s one of the most common questions in software engineering interviews, especially for tech leads and engineering managers. But here’s the thing — this isn’t just an interview question. It’s a real-world challenge that impacts project success, team morale, and ultimately, the business.…
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Implementing LRU Cache in Java Using LinkedHashMap
(The simplest, cleanest way — and why it’s more than enough in real-world systems) 🎯 What is an LRU Cache? An LRU Cache (Least Recently Used Cache) is a special type of cache that: Keeps a fixed number of elements (say, capacity = 100). Every time you access (read or write) a key, it becomes…
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The Ultimate Guide to @Mock, @InjectMocks and @MockBean in Spring Boot Testing
🎯 The Ultimate Guide to @Mock, @InjectMocks and @MockBean in Spring Boot Testing ✅ By the end, you’ll know exactly when to use each, how they work under the hood, and what you’re truly testing. 🚀 Why do we need mocks? When writing unit tests, you want to test your business logic in isolation, without…
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🚀 New Genie for Engineers: ChatGPT 🌟 Introduction If you’re an engineer, you’ve probably wished more than once for a personal assistant who could:✅ Write out code examples✅ Explain confusing bugs✅ Design a database schema✅ Suggest library choices✅ Or even help with naming your new SaaS product Now you have it.That’s what ChatGPT has become…
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PostgreSQL supports several index types, each optimized for different kinds of queries and data structures. Here’s a breakdown:
1. B-tree (Default) • Use for: Equality and range queries (=, <, >, BETWEEN, ORDER BY) • Best for: Most use cases (numeric, text, date/time) • Limitations: Not ideal for arrays, full-text, or geometric data 2. GIN (Generalized Inverted Index) • Use for: Multi-valued columns (arrays, jsonb, full-text search) • Best for: Full-text search (to_tsvector,…
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🧠 The Ultimate Guide to AWS Glue, S3, Athena, and Redshift
Amazon’s data services form a powerful ecosystem for building scalable, serverless data lakes and warehouses. This guide explains the complete picture: from S3 to Glue to Athena and Redshift. You’ll learn what each component does, why it exists, when to use it, and how they work together. 🔹 Part 1: What Is Amazon S3? Amazon…
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🌀 Python Coroutines Explained – Async Programming with Real-Life Examples and Visuals
Python’s coroutines let you write concurrent, non-blocking code that’s readable, powerful, and fast. They’re especially helpful when you’re dealing with I/O operations like web requests or file access. But coroutines can be confusing — especially when you’re wondering:“If a coroutine gives up control using await, how does it ever finish its job?” Let’s explore all this in depth. 🔍 What…
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Mastering __str__() and Method Types in Python: How Built-ins Work and When to Use What
When you start diving deeper into Python classes, you’ll likely come across strange-looking method names like __str__, __repr__, or __len__. These are dunder methods (short for “double underscore”), and they power many of Python’s built-in behaviors. But they also raise some excellent questions: This article brings clarity to all of these with clean examples and explanations. 1. Why Python Uses __str__() Instead…
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Python’s *args and **kwargs — The Ultimate Guide with Examples and Interview-Ready Insights
One of Python’s most flexible and readable features is its support for variable-length arguments using *args and **kwargs. But if you’ve ever wondered: You’re in the right place. This guide explains it all, with clear examples, visual breakdowns, and pro tips for interviews and real-world use. 🧠 What Are *args and **kwargs? Syntax Name Accepts *args Positional arguments A tuple of unnamed values…
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