Interviews

 interviews that you should absolutely master 

Basic + Practical Understanding
 Tell me about yourself (Project-focused answer matters!)
 What types of waits have you used? Where & why?
 Difference between find Element() vs find Elements()
 How do you click a button in Selenium? (Real approach, not just syntax)
Real-Time Scenario Questions
 How do you fetch a value using Selenium and reuse it later?
 How do you extract data from a dynamic web table?
 How do you handle multiple windows & validate navigation?
 How to extract a 6-digit OTP/text from a paragraph?
Coding + Logic Round
 Convert String → Integer in Java
 Types of variables used in your framework
 Custom methods/functions you’ve created in your project
Advanced Thinking (Most Important 
 How will you start automation from scratch? (Framework + tools decision)
 How do you connect your framework with a database & fetch data?
 What TCS Actually Looks For:
Strong basics (not mugged-up answers)

 Practical implementation knowledge
Real-time problem-solving approach

Microsoft Power BI Data Analyst Certification Training
 𝗖𝗼𝘂𝗿𝘀𝗲 𝗖𝘂𝗿𝗿𝗶𝗰𝘂𝗹𝘂𝗺 
 Data Cleaning & Transformation (Power Query)
 Data Modeling
 Data Visualization
 DAX Functions & Advanced DAX Calculations
 Power BI Service
 Power BI Administration, Governance & Security
 End-to-End Power BI Projects (Real-World Use Cases)
 PL-300 Exam Pattern & Mock Practice Questions
 Power BI Interview Preparation
 Scenario-Based Power BI Interview Questions
 PL-300 Certification Tips & Exam Readiness Sessions

Topics Covered:

 SELECT, INSERT, UPDATE, DELETE
 WHERE, AND, OR, NOT
 ORDER BY & LIMIT
 Aggregate Functions (COUNT, SUM, AVG, MIN, MAX)
 GROUP BY & HAVING
 JOINS (INNER, LEFT, RIGHT, FULL)
 Subqueries
 Keys & Constraints
 Indexes & Views
 Transactions
 Window Functions
 CTEs & CASE Statements

𝐀𝐏𝐈 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 𝐈𝐧𝐭𝐞𝐫𝐯𝐢𝐞𝐰 𝐐𝐮𝐞𝐬𝐭𝐢𝐨𝐧𝐬 𝐐&𝐀

1. What is an API?
(A way for software systems to talk to each other.)
2. What are the advantages of API testing?
(Find bugs faster, test without a user interface, release software quicker.)
3. Explain the different types of API testing.
(Functional (does it work?), Performance (is it fast?), Security (is it safe?), and more.)
4. What are the common protocols used in API testing?
(HTTP, REST, SOAP)
5. What are the main differences between API and Web Service?
(All web services are APIs, but not all APIs are web services. Web services use specific web protocols.)
6. What is the difference between API testing and Unit testing?
(API testing checks a group of components, Unit testing checks individual parts.)
7. What are the core components of an HTTP request?
(URL, method (like GET or POST), headers, and body.)
8. What are some common HTTP methods and what are they used for?
(GET (retrieve data), POST (send data), PUT (update data), DELETE (remove data).)

API

 Some APIs prioritize simplicity. Others are built for performance, real-time communication, enterprise security, or complex integrations.

Here’s the practical breakdown:

→ 𝗥𝗘𝗦𝗧 𝗔𝗣𝗜
Best for web apps, mobile applications, microservices, and standard CRUD operations.

→ 𝗚𝗿𝗮𝗽𝗵𝗤𝗟 𝗔𝗣𝗜
Lets clients request exactly the data they need. Useful for dashboards, social platforms, and data-heavy frontends.

→ 𝗦𝗢𝗔𝗣 𝗔𝗣𝗜
Designed for structured, secure enterprise integrations, especially in banking, government, and financial systems.

→ 𝗴𝗥𝗣𝗖 𝗔𝗣𝗜
Provides fast service-to-service communication using Protocol Buffers. Well suited for microservices and low-latency systems.

→ 𝗪𝗲𝗯𝗦𝗼𝗰𝗸𝗲𝘁 𝗔𝗣𝗜
Maintains a two-way connection for live chat, collaboration tools, gaming, and real-time updates.

→ 𝗦𝘁𝗿𝗲𝗮𝗺𝗶𝗻𝗴 𝗔𝗣𝗜
Continuously delivers events and data for analytics, market feeds, IoT monitoring, and event-driven systems.

→ 𝗖𝗼𝗺𝗽𝗼𝘀𝗶𝘁𝗲 𝗔𝗣𝗜
Combines multiple API calls into one request, reducing network overhead in complex workflows.

→ 𝗜𝗻𝘁𝗲𝗿𝗻𝗮𝗹 𝗔𝗣𝗜
Connects services, teams, and systems securely inside an organization.

→ 𝗣𝗮𝗿𝘁𝗻𝗲𝗿 𝗔𝗣𝗜
Provides controlled access to approved partners for B2B integrations and shared workflows.

→ 𝗢𝗽𝗲𝗻 𝗔𝗣𝗜
Exposes selected capabilities to external developers, customers, and third-party applications.

𝗧𝗵𝗲 𝘁𝗮𝗸𝗲𝗮𝘄𝗮𝘆:

Choose REST for simplicity, GraphQL for flexible queries, gRPC for speed, WebSockets for live updates, and SOAP for strict enterprise requirements.