Don’t get overwhelmed, Java is only this much 🚀

1. *Variables*
- int
- double
- float
- boolean
- char
- String

2. *Data Types*
- Primitive: int, float, char, boolean, long, double, byte, short
- Reference: classes, arrays, interfaces

3. *Declaring Variables*
- Syntax: type variableName = value;

4. *Expressions*
- Arithmetic: +, -, *, /, %
- Logical: &&, ||,!
- Comparison: ==,!=, <, >, <=, >=

5. *Operators*
- Arithmetic
- Assignment (=, +=, -=, etc.)
- Increment/Decrement (++/--)
- Logical
- Bitwise

6. *Control Structures*
- if
- else if
- else
- switch-case
- break
- continue

7. *Loops*
- for
- while
- do-while
- for-each (arrays/collections)

8. *Methods (Functions)*
- Return types, void
- Parameters
- Method overloading
- Static methods

9. *Objects and Classes*
- Class declaration
- Object creation (new)
- Fields & methods
- Constructors

10. *Inheritance & Polymorphism*
- extends
- super
- Method overriding
- Interfaces (implements)
- Abstract classes

11. *Encapsulation*
- private, public, protected
- Getters & setters

12. *Abstraction*
- Abstract classes
- Interfaces

13. *Exception Handling*
- try
- catch
- finally
- throw
- throws

14. *Arrays & Collections*
- Arrays
- ArrayList
- LinkedList
- HashMap
- Set

15. *Generics*
- List<String>
- Map<Key, Value>

16. *Streams (Java 8+)*
- Stream API
- filter, map, collect

17. *Lambda Expressions*
- (params) -> expression

18. *File I/O*
- FileReader
- FileWriter
- BufferedReader
- Scanner

19. *Multithreading*
- Thread class
- Runnable interface
- synchronized
- wait/notify

20. *Static & Final*
- static variables/methods
- final class/method/variable

21. *Packages & Imports*
- package
- import

22. *JVM, JRE & JDK*
- JVM: runs code
- JRE: environment
- JDK: tools + JRE

23. *Annotations*
- @Override
- @Deprecated
- @FunctionalInterface

24. *Access Modifiers*
- public
- private
- protected
- default (package-private)

25. *Testing Frameworks*
- JUnit
- TestReact ❤️ for morere** 😊

Day 19/100

Day 20/100

Day 21/100

Here is a powerful 𝗜𝗡𝗧𝗘𝗥𝗩𝗜𝗘𝗪 𝗧𝗜𝗣 to help you land a job!

Most people who are skilled enough would be able to clear technical rounds with ease.

But when it comes to 𝗯𝗲𝗵𝗮𝘃𝗶𝗼𝗿𝗮𝗹/𝗰𝘂𝗹𝘁𝘂𝗿𝗲 𝗳𝗶𝘁 rounds, some folks may falter and lose the potential offer.

Many companies schedule a behavioral round with a top-level manager in the organization to understand the culture fit (except for freshers).

One needs to clear this round to reach the salary negotiation round.

Here are some tips to clear such rounds:

1️⃣ Once the HR schedules the interview, try to find the LinkedIn profile of the interviewer using the name in their email ID.

2️⃣ Learn more about his/her past experiences and try to strike up a conversation on that during the interview.

3️⃣ This shows that you have done good research and also helps strike a personal connection.

4️⃣ Also, this is the round not just to evaluate if you're a fit for the company, but also to assess if the company is a right fit for you.

5️⃣ Hence, feel free to ask many questions about your role and company to get a clear understanding before taking the offer. This shows that you really care about the role you're getting into.

💡 𝗕𝗼𝗻𝘂𝘀 𝘁𝗶𝗽 - Be polite yet assertive in such interviews. It impresses a lot of senior folks.

🚀 Backend Developer Roadmap 🚀

1. Foundation: 📚 Learn fundamental programming concepts such as variables, data types, and control flow. Master a programming language like Python, Java, or JavaScript.

2. Database Management: 🛢️ Understand database systems like SQL and NoSQL. Learn about relational databases (e.g., MySQL, PostgreSQL) and non-relational databases (e.g., MongoDB, Redis).

3. API Development: 🌐 Explore RESTful API principles and design patterns. Learn how to create, test, and document APIs using frameworks like Flask (Python), Spring Boot (Java), or Express (JavaScript).

4. Authentication & Authorization: 🔒 Dive into authentication methods like JWT (JSON Web Tokens) and OAuth. Understand authorization mechanisms to control access to resources securely.

5. Server-Side Frameworks: 🛠️ Get hands-on experience with backend frameworks such as Django (Python), Spring (Java), or Express (JavaScript). Learn how to build robust, scalable web applications.

6. Middleware & Caching: 🔄 Explore middleware concepts for request processing and handling. Implement caching strategies using tools like Redis to improve performance.

7. Testing & Debugging: 🐞 Master unit testing, integration testing, and end-to-end testing techniques. Use debugging tools and practices to identify and resolve issues effectively.

8. Security Best Practices: 🛡️ Learn about common security threats and how to mitigate them. Implement security measures such as input validation, encryption, and secure communication protocols.

9. Containerization & Deployment: 🚢 Familiarize yourself with containerization technologies like Docker and container orchestration platforms like Kubernetes. Learn how to deploy and manage applications in production environments.

10. Monitoring & Logging: 📊 Understand the importance of monitoring and logging for application health and performance. Explore tools like Prometheus, Grafana, and ELK stack for monitoring and log management.

11. Scalability & Performance Optimization: ⚙️ Learn techniques for scaling backend systems to handle increased loads. Optimize performance through efficient algorithms, caching, and database optimization.

12. Continuous Integration & Deployment (CI/CD): 🔄🚀 Implement CI/CD pipelines to automate testing, building, and deployment processes. Utilize tools like Jenkins, GitLab CI, or GitHub Actions for seamless integration and deployment.

13. Version Control: 📝 Embrace version control systems like Git for managing code changes and collaboration. Learn branching strategies and best practices for efficient team development.

14. Documentation: 📄 Document your code, APIs, and system architecture effectively. Clear documentation improves understanding, maintenance, and collaboration among team members.

15. Stay Updated: 📰 Keep abreast of new technologies, frameworks, and best practices in backend development. Engage with the community, attend conferences, and participate in online forums to stay current.

Web Development Best Resources: https://topmate.io/coding/930165

ENJOY LEARNING 👍👍

#webdev

List of Top 12 Coding Channels on WhatsApp:

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ENJOY LEARNING 👍👍

These are the Top 5 Most Common SQL Questions for Data Engineering:


1. Total records after joining two tables on all types of joins
2. Rolling Sum and Nth salary based questions
3. Lag/Lead based questions e.g., consecutive months of increasing sales or YoY growth
4. Query to find employees who earn more than their managers
5. Removing duplicates from a table


Key Takeaways:
- Master window functions and joins
- Practice medium to hard SQL questions regularly

Getting good at SQL will pay off in the long run! 💪

Join our WhatsApp channel of Data Engineers: https://whatsapp.com/channel/0029Vaovs0ZKbYMKXvKRYi3C