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      • Big O Basic Concepts
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      • Data Structures Comparison Table
      • LinkedList
      • Binary Search Tree (BST)
    • Java
      • What is JDK?
      • Platform Independency of Java
      • What exactly Object in Java?
      • OOPs Principles
      • 🔐 Encapsulation in Java – Explained Simply
      • 🧬 Inheritance in Java – Explained Simply
      • 🌀 Polymorphism in Java – Explained Simply
      • 🧊 Abstraction in Java
      • ⚖️ Interface vs Abstract Class in Java
      • Basic building blocks of Java program
      • Static vs Non-Static members in Java
      • Constructor vs Method in Java
      • Primitive Data Types in Java
      • Type Casting in Java
      • Java Identifiers & naming conventions
      • Keywords in Java
      • Wrapper Classes | Autoboxing | Unboxing | Java
      • Increment & Decrement Operators in Java
      • Arithmatic Operators In Java
      • Bitwise Opertator In Java
      • Short Circuit Operators In Java
      • Ternary Operator In Java
      • .equals() Vs ==
      • How HashMap works Internally?
      • How do we sort list of Objects in Java?
      • Compile Time vs Runtime In Java
      • Collection Interface
      • List Interface
      • LinkedList in Java
      • ArrayList Vs LinkedList Vs Vector
      • Set Interface & its implementations
      • Map Interface & Implementations
      • Queue Interface
      • Comparator vs Comparable
      • Concurrent Collections in Java
      • Exception in Java
      • Threading in Java
      • String in Java?
      • Enum in Java
      • 🧩 What are Design Patterns?
      • 🌟 Top Features of Java 8
      • 🔹 What is a Lambda Expression?
      • Lambda Sample Examples
      • 🧩 What is a Functional Interface?
      • 🔍 What is a Predicate?
      • 🔧 What is a Method Reference?
      • 🔹 What is the Stream API?
      • Parallel Streams in Java – Explanation & Advantages
      • Stream API Sample Examples
      • 🔹 What is Optional?
      • 🔧 Core Stream Functions in Java Lambda Processing
      • Java 9 Features
      • Java 10 Features
      • Java 11 Features
      • Java 12 features
      • Java 14 Features
      • Java 15 and 16 Features
      • Java 17 Features
      • What is Lambok?
      • Pass by value or Pass by Reference?
      • How to avoid OutOfMemory error in java
    • System Design
      • What is Distributed System?
      • Five essential steps for System Design
      • RAID in System Design
      • Consistent Hashing
      • ✅ HTTP vs HTTPS
      • Decomposing Monolithic to Microservices: Best practices
      • Object Store Vs Document Store
      • What is Elastic Search?
      • CDN Vs API Gateway
      • Load Balancers Vs API Gateways
      • Latency vs Throughput
      • ⏱️ Standard Latency Benchmarks in System Design
      • High Level Design (HLL) vs Low Level Design (LLD)
      • ⚖️ CAP Theorem – Explained Simply
      • 🌐 What is Partition Tolerance in CAP Theorem?
      • 🧩 Enterprise Integration Patterns (EIP)
      • 🔁 High Availability (HA) vs 🔼 Scalability
      • Apache Camel
      • SOLID Principles
      • ✅ What is a JWT (JSON Web Token)?
      • When one microservice talks to two databases
      • Microservices Design Patterns: Essential Architecture and Design Guide
      • The 15 Factors | Heroku’s Twelve-Factor App
      • OpenID & Auth 2.0
      • Microservices Anti‑Patterns
      • Distributed transactions in Microservices?
      • What are sidecars in microservices?
      • What is Service Mesh?
      • How do you deploy Microservices?
      • Monolithic, SOA, and Microservices Architecture?
      • How to Deploy Java Spring Boot Microservices in AWS?
      • How do you deploy microservices in production?
      • Calculating TPS & Resource Estimations
      • How to find Memory Leakage & Fix them?
      • Deploy Java application with Complete CI/CD pipeline Jenkins
      • Payment Gateway integration with Spring Boot
      • OAuth 2.0 / OIDC for Spring Boot microservices using PingFederate
    • Spring Boot
      • Inversion of Control (IoC) & Dependency Injection
      • How a Spring Boot Application Works (Under the Hood)
      • Spring Bean Lifecycle
      • Spring Boot Bean scopes
      • IoC Containers : ApplicationContext vs BeanFactory
      • 🔒 Step-by-Step HTTPS Request Flow in Spring Boot
      • 🚀 What is a Spring Boot Starter?
      • @SpringBootApplication Annotation
      • @Controller Vs @RestController
      • @RequestMapping Vs @GetMapping
      • REST API Using Spring Boot: Create, Read, Update, Delete (Step-by-Step)
      • 📦 What is Spring Data JPA?
      • 🌐 What is a REST Client?
      • 🔐 What is Spring Security? How to Implement Spring Security in Spring Boot?
      • 🌱 What are Spring Profiles?
      • ❤️ What is a Health Check & Metrics In Spring Boot?
      • 📝 Logging in Spring Boot
      • 🌿 What is Thymeleaf?
      • Spring Framework VS Spring Boot
      • 🚀 Database Caching In Spring Boot?
      • ⚙️ What is Spring Batch?
      • Messaging and Spring JMS with Spring Boot
      • Apache Kafka with Spring Boot
      • Swagger Documentation with Spring Boot
      • ✅ What is Pagination?
      • ✅ CrudRepository vs JpaRepository
      • ✅ How Rollback Works in Spring Boot?
      • Input Validation in REST API (Spring Boot)
      • ✅ Session Management in Spring Boot
      • SonarQube integration with Spring Boot
      • REST API Fallback mechanism!
      • Spring Boot REST API : Upload & Download files
      • 📦 What is MultipartFile?
      • Spring Boot & MongoDB integration
      • 🧠 AOP in Spring Boot
      • What is @Qualifier?
      • Global Exceptions Handling in Spring Boot
      • Path variable vs Query Parameters in Spring Boot
      • Reactive Programming with Spring Boot
      • Filter vs Inerceptor in Spring
      • Spring @Retryable
      • Spring Boot - Externalized Configuration
      • Secret management (passwords, API keys, user IDs) — Spring Boot best practices
      • Quick Interview Questions
    • MySQL
      • 🐬 MySQL Basics
      • Database Normalization
      • Database Schema Design - Best Practices
      • How to Choose between SQL vs NoSQL databases?
      • Views in MySQL
      • JOINS in MySQL
      • MySQL Indexes
      • MySQL Triggers
      • MySQL Operators and Clauses
      • MySQL Data Types
      • SQL constraints
      • SQL Cursor?
      • DELETE VS TRUNCATE VS DROP
    • Apache Kafka
      • 📬 What is a Message Broker?
      • What is ZooKeeper?
      • Major Components of Apache Kafka
      • What is a Partition in Kafka?
      • How Kafka prevents duplicates?
      • What is Kafka Schema Registry?
      • What are In-Sync Replicas (ISR) in Kafka?
      • What is a Consumer Group in Kafka?
      • Describe in what ways Kafka enforces security?
      • Understanding Kafka message format
      • Message Size in Kafka
      • Apache Kafka vs Apache Camel
      • Kafka Interview Questions
    • AWS
      • ☁️ What is AWS?
      • 🌍 AWS Global Infrastructure?
      • 🔐 What is AWS IAM?
      • 🖥️ What is Amazon EC2?
      • 🧩 What Are EC2 Instance Types?
      • 🔐 What are Security Groups?
      • 💰 EC2 Purchasing Options
      • Elastic Block Storage (EBS)
      • 📸 What is an EBS Snapshot?
      • 🖼️ What is Amazon AMI?
      • 💾 What is AWS Instance Store?
      • 📂 What is Amazon EFS?
      • Comparison of EBS, EFS, and Instance Store in AWS
      • Load Balancers in AWS
      • Public IP vs Private IP
      • AWS Placement Groups
      • 🌐 What is an Elastic IP (EIP) in AWS?
      • 🔌 What is an ENI (Elastic Network Interface) in AWS?
      • 💤 What is EC2 Hibernate in AWS?
      • 🌐 Amazon Route 53
      • ⚖️ How SSL/TLS Works with AWS Load Balancers
      • Auto Scaling Groups (ASG)
      • 🧱 What is AWS CloudFormation?
      • ✉️ What is AWS SES?
      • 📢 What is AWS Pinpoint?
      • 💰 What is AWS Cost Explorer?
      • 🧠 What is AWS Batch?
      • AWS Relational Database Service (RDS)
      • Amazon Aurora
      • ⚡ Amazon ElastiCache
      • 🆚 Domain Registrar vs DNS Service
      • 🌐 What Are DNS Records?
      • ⏱️ What is TTL in Route 53?
      • 🌱 What is AWS Elastic Beanstalk?
      • 🪣 AWS S3 - Basics
      • AWS S3 - Advanced
      • 🔐 Amazon S3 - Security Overview
      • ☁️ What is Amazon CloudFront?
      • 🌐 What is AWS Global Accelerator?
      • ❄️ AWS Snow Family – Edge & Offline Storage Services
      • AWS Snowball → Amazon S3 Glacier
      • 📁 What is Amazon FSx?
      • 🌩️ AWS Hybrid Cloud for Storage – Overview
      • 📊 AWS Storage Services Comparison Table
      • 🔁 What is AWS DataSync?
      • What is AWS SQS (Amazon Simple Queue Service)?
      • Amazon SNS (Simple Notification Service)
      • ⚡ Amazon Kinesis – Overview
      • Serverless in AWS | AWS Lambda
      • 🧠 Amazon DynamoDB – Overview
      • AWS API Gateway
      • Choosing the Right AWS Database
      • AWS Data & Analytics
      • AWS Machine Learning
      • Amazon CloudWatch Metrics
      • Amazon EventBridge
      • AWS CloudTrail
      • AWS Security & Encryption
      • AWS VPC
      • AWS Disaster Recovery (DR)
  • Tech News
    • 📉 Microsoft Announces Another Round of Job Cuts in July, 2025
    • TCS's New Policy to Reduce Bench Time: What It Means for Employees and the IT Industry
    • Python vs Java: A 2025 Comparison Guide for Developers
    • Struggling for Your First Tech Job? Here's What Indian Freshers Need to Know
    • Intel Layoffs 20K in the Year 2025: What It Means for the Tech World
    • TCS Delaying Appraisals: A Wake-Up Call for India's Tech Giant?
    • Why Java Still Rules the Job Market in 2025?
    • List of IT companies in Noida with Career Email and Website!
    • Are Middle Managers Becoming Obsolete? Microsoft Thinks So!
    • Google India Layoffs in April 2025: Navigating Restructuring Amid AI-Driven Transformation
    • 🚀 Your Complete Guide to the AWS Certification Path – From Beginner to Expert
    • 🧭 Java Certification Path – An Overview
    • 🧑🎓 Java vs Python – Which Programming Language Should College Students Learn First?
    • 🏫 Top Engineering Colleges in Greater Noida – Ranked in Ascending Order (2025 Guide)
    • 🔝 Top 10 Java Training Institutes in Greater Noida
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  • Home
  • Courses
  • Java | J2EE
  • DevOps & Cloud
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  • Interview
    • Cheatsheets
      • GIT Cheatsheets
      • 🛠 Kafka Cheatsheet: Core Commands
      • MySQL Cheatsheet
      • Docker & Kubernetes Cheatsheet
      • Spring Boot Cheatsheet
      • Linux Command Cheatsheet
      • AWS CheatSheet
      • MacOS CheatSheet
      • English Grammar Cheatsheet
    • DSA
      • Big O Basic Concepts
      • Data Structures in Java
      • Data Structures Comparison Table
      • LinkedList
      • Binary Search Tree (BST)
    • Java
      • What is JDK?
      • Platform Independency of Java
      • What exactly Object in Java?
      • OOPs Principles
      • 🔐 Encapsulation in Java – Explained Simply
      • 🧬 Inheritance in Java – Explained Simply
      • 🌀 Polymorphism in Java – Explained Simply
      • 🧊 Abstraction in Java
      • ⚖️ Interface vs Abstract Class in Java
      • Basic building blocks of Java program
      • Static vs Non-Static members in Java
      • Constructor vs Method in Java
      • Primitive Data Types in Java
      • Type Casting in Java
      • Java Identifiers & naming conventions
      • Keywords in Java
      • Wrapper Classes | Autoboxing | Unboxing | Java
      • Increment & Decrement Operators in Java
      • Arithmatic Operators In Java
      • Bitwise Opertator In Java
      • Short Circuit Operators In Java
      • Ternary Operator In Java
      • .equals() Vs ==
      • How HashMap works Internally?
      • How do we sort list of Objects in Java?
      • Compile Time vs Runtime In Java
      • Collection Interface
      • List Interface
      • LinkedList in Java
      • ArrayList Vs LinkedList Vs Vector
      • Set Interface & its implementations
      • Map Interface & Implementations
      • Queue Interface
      • Comparator vs Comparable
      • Concurrent Collections in Java
      • Exception in Java
      • Threading in Java
      • String in Java?
      • Enum in Java
      • 🧩 What are Design Patterns?
      • 🌟 Top Features of Java 8
      • 🔹 What is a Lambda Expression?
      • Lambda Sample Examples
      • 🧩 What is a Functional Interface?
      • 🔍 What is a Predicate?
      • 🔧 What is a Method Reference?
      • 🔹 What is the Stream API?
      • Parallel Streams in Java – Explanation & Advantages
      • Stream API Sample Examples
      • 🔹 What is Optional?
      • 🔧 Core Stream Functions in Java Lambda Processing
      • Java 9 Features
      • Java 10 Features
      • Java 11 Features
      • Java 12 features
      • Java 14 Features
      • Java 15 and 16 Features
      • Java 17 Features
      • What is Lambok?
      • Pass by value or Pass by Reference?
      • How to avoid OutOfMemory error in java
    • System Design
      • What is Distributed System?
      • Five essential steps for System Design
      • RAID in System Design
      • Consistent Hashing
      • ✅ HTTP vs HTTPS
      • Decomposing Monolithic to Microservices: Best practices
      • Object Store Vs Document Store
      • What is Elastic Search?
      • CDN Vs API Gateway
      • Load Balancers Vs API Gateways
      • Latency vs Throughput
      • ⏱️ Standard Latency Benchmarks in System Design
      • High Level Design (HLL) vs Low Level Design (LLD)
      • ⚖️ CAP Theorem – Explained Simply
      • 🌐 What is Partition Tolerance in CAP Theorem?
      • 🧩 Enterprise Integration Patterns (EIP)
      • 🔁 High Availability (HA) vs 🔼 Scalability
      • Apache Camel
      • SOLID Principles
      • ✅ What is a JWT (JSON Web Token)?
      • When one microservice talks to two databases
      • Microservices Design Patterns: Essential Architecture and Design Guide
      • The 15 Factors | Heroku’s Twelve-Factor App
      • OpenID & Auth 2.0
      • Microservices Anti‑Patterns
      • Distributed transactions in Microservices?
      • What are sidecars in microservices?
      • What is Service Mesh?
      • How do you deploy Microservices?
      • Monolithic, SOA, and Microservices Architecture?
      • How to Deploy Java Spring Boot Microservices in AWS?
      • How do you deploy microservices in production?
      • Calculating TPS & Resource Estimations
      • How to find Memory Leakage & Fix them?
      • Deploy Java application with Complete CI/CD pipeline Jenkins
      • Payment Gateway integration with Spring Boot
      • OAuth 2.0 / OIDC for Spring Boot microservices using PingFederate
    • Spring Boot
      • Inversion of Control (IoC) & Dependency Injection
      • How a Spring Boot Application Works (Under the Hood)
      • Spring Bean Lifecycle
      • Spring Boot Bean scopes
      • IoC Containers : ApplicationContext vs BeanFactory
      • 🔒 Step-by-Step HTTPS Request Flow in Spring Boot
      • 🚀 What is a Spring Boot Starter?
      • @SpringBootApplication Annotation
      • @Controller Vs @RestController
      • @RequestMapping Vs @GetMapping
      • REST API Using Spring Boot: Create, Read, Update, Delete (Step-by-Step)
      • 📦 What is Spring Data JPA?
      • 🌐 What is a REST Client?
      • 🔐 What is Spring Security? How to Implement Spring Security in Spring Boot?
      • 🌱 What are Spring Profiles?
      • ❤️ What is a Health Check & Metrics In Spring Boot?
      • 📝 Logging in Spring Boot
      • 🌿 What is Thymeleaf?
      • Spring Framework VS Spring Boot
      • 🚀 Database Caching In Spring Boot?
      • ⚙️ What is Spring Batch?
      • Messaging and Spring JMS with Spring Boot
      • Apache Kafka with Spring Boot
      • Swagger Documentation with Spring Boot
      • ✅ What is Pagination?
      • ✅ CrudRepository vs JpaRepository
      • ✅ How Rollback Works in Spring Boot?
      • Input Validation in REST API (Spring Boot)
      • ✅ Session Management in Spring Boot
      • SonarQube integration with Spring Boot
      • REST API Fallback mechanism!
      • Spring Boot REST API : Upload & Download files
      • 📦 What is MultipartFile?
      • Spring Boot & MongoDB integration
      • 🧠 AOP in Spring Boot
      • What is @Qualifier?
      • Global Exceptions Handling in Spring Boot
      • Path variable vs Query Parameters in Spring Boot
      • Reactive Programming with Spring Boot
      • Filter vs Inerceptor in Spring
      • Spring @Retryable
      • Spring Boot - Externalized Configuration
      • Secret management (passwords, API keys, user IDs) — Spring Boot best practices
      • Quick Interview Questions
    • MySQL
      • 🐬 MySQL Basics
      • Database Normalization
      • Database Schema Design - Best Practices
      • How to Choose between SQL vs NoSQL databases?
      • Views in MySQL
      • JOINS in MySQL
      • MySQL Indexes
      • MySQL Triggers
      • MySQL Operators and Clauses
      • MySQL Data Types
      • SQL constraints
      • SQL Cursor?
      • DELETE VS TRUNCATE VS DROP
    • Apache Kafka
      • 📬 What is a Message Broker?
      • What is ZooKeeper?
      • Major Components of Apache Kafka
      • What is a Partition in Kafka?
      • How Kafka prevents duplicates?
      • What is Kafka Schema Registry?
      • What are In-Sync Replicas (ISR) in Kafka?
      • What is a Consumer Group in Kafka?
      • Describe in what ways Kafka enforces security?
      • Understanding Kafka message format
      • Message Size in Kafka
      • Apache Kafka vs Apache Camel
      • Kafka Interview Questions
    • AWS
      • ☁️ What is AWS?
      • 🌍 AWS Global Infrastructure?
      • 🔐 What is AWS IAM?
      • 🖥️ What is Amazon EC2?
      • 🧩 What Are EC2 Instance Types?
      • 🔐 What are Security Groups?
      • 💰 EC2 Purchasing Options
      • Elastic Block Storage (EBS)
      • 📸 What is an EBS Snapshot?
      • 🖼️ What is Amazon AMI?
      • 💾 What is AWS Instance Store?
      • 📂 What is Amazon EFS?
      • Comparison of EBS, EFS, and Instance Store in AWS
      • Load Balancers in AWS
      • Public IP vs Private IP
      • AWS Placement Groups
      • 🌐 What is an Elastic IP (EIP) in AWS?
      • 🔌 What is an ENI (Elastic Network Interface) in AWS?
      • 💤 What is EC2 Hibernate in AWS?
      • 🌐 Amazon Route 53
      • ⚖️ How SSL/TLS Works with AWS Load Balancers
      • Auto Scaling Groups (ASG)
      • 🧱 What is AWS CloudFormation?
      • ✉️ What is AWS SES?
      • 📢 What is AWS Pinpoint?
      • 💰 What is AWS Cost Explorer?
      • 🧠 What is AWS Batch?
      • AWS Relational Database Service (RDS)
      • Amazon Aurora
      • ⚡ Amazon ElastiCache
      • 🆚 Domain Registrar vs DNS Service
      • 🌐 What Are DNS Records?
      • ⏱️ What is TTL in Route 53?
      • 🌱 What is AWS Elastic Beanstalk?
      • 🪣 AWS S3 - Basics
      • AWS S3 - Advanced
      • 🔐 Amazon S3 - Security Overview
      • ☁️ What is Amazon CloudFront?
      • 🌐 What is AWS Global Accelerator?
      • ❄️ AWS Snow Family – Edge & Offline Storage Services
      • AWS Snowball → Amazon S3 Glacier
      • 📁 What is Amazon FSx?
      • 🌩️ AWS Hybrid Cloud for Storage – Overview
      • 📊 AWS Storage Services Comparison Table
      • 🔁 What is AWS DataSync?
      • What is AWS SQS (Amazon Simple Queue Service)?
      • Amazon SNS (Simple Notification Service)
      • ⚡ Amazon Kinesis – Overview
      • Serverless in AWS | AWS Lambda
      • 🧠 Amazon DynamoDB – Overview
      • AWS API Gateway
      • Choosing the Right AWS Database
      • AWS Data & Analytics
      • AWS Machine Learning
      • Amazon CloudWatch Metrics
      • Amazon EventBridge
      • AWS CloudTrail
      • AWS Security & Encryption
      • AWS VPC
      • AWS Disaster Recovery (DR)
  • Tech News
    • 📉 Microsoft Announces Another Round of Job Cuts in July, 2025
    • TCS's New Policy to Reduce Bench Time: What It Means for Employees and the IT Industry
    • Python vs Java: A 2025 Comparison Guide for Developers
    • Struggling for Your First Tech Job? Here's What Indian Freshers Need to Know
    • Intel Layoffs 20K in the Year 2025: What It Means for the Tech World
    • TCS Delaying Appraisals: A Wake-Up Call for India's Tech Giant?
    • Why Java Still Rules the Job Market in 2025?
    • List of IT companies in Noida with Career Email and Website!
    • Are Middle Managers Becoming Obsolete? Microsoft Thinks So!
    • Google India Layoffs in April 2025: Navigating Restructuring Amid AI-Driven Transformation
    • 🚀 Your Complete Guide to the AWS Certification Path – From Beginner to Expert
    • 🧭 Java Certification Path – An Overview
    • 🧑🎓 Java vs Python – Which Programming Language Should College Students Learn First?
    • 🏫 Top Engineering Colleges in Greater Noida – Ranked in Ascending Order (2025 Guide)
    • 🔝 Top 10 Java Training Institutes in Greater Noida
  • Refund Policy
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