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🔐 Encapsulation in Java – Explained Simply
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Wrapper Classes | Autoboxing | Unboxing | Java
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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
Concurrent Collections in Java
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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?
Stream API Sample Examples
🔹 What is Optional?
🔧 Core Stream Functions in Java Lambda Processing
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What is Distributed System?
Five essential steps for System Design
RAID in System Design
Consistent Hashing
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✅ HTTP vs HTTPS
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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 OAuth 2.0?
✅ What is a JWT (JSON Web Token)?
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Inversion of Control (IoC) & Dependency Injection
🔒 Step-by-Step HTTPS Request Flow in Spring Boot
🚀 What is a Spring Boot Starter?
@Controller Vs @RestController
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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
Quick Interview Questions
MySQL
MySQL
Database Normalization
Database Schema Design - Best Practices
How to Choose between SQL vs NoSQL databases?
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Apache Kafka
📬 What is a Message Broker?
Apache Kafka vs Apache Camel
How Kafka prevents duplicates?
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☁️ 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?
Tech News
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
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Courses
Java | J2EE
DevOps & Cloud
Gen AI
Tutorials
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
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
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?
Stream API Sample Examples
🔹 What is Optional?
🔧 Core Stream Functions in Java Lambda Processing
Python
System Design
What is Distributed System?
Five essential steps for System Design
RAID in System Design
Consistent Hashing
CQRS (Command Query Responsibility Segregation)
✅ 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 OAuth 2.0?
✅ What is a JWT (JSON Web Token)?
Spring Boot
Inversion of Control (IoC) & Dependency Injection
🔒 Step-by-Step HTTPS Request Flow in Spring Boot
🚀 What is a Spring Boot Starter?
@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
Quick Interview Questions
MySQL
Database Normalization
Database Schema Design - Best Practices
How to Choose between SQL vs NoSQL databases?
Apache Kafka
📬 What is a Message Broker?
Apache Kafka vs Apache Camel
How Kafka prevents duplicates?
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?
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
Refund Policy
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