Data Engineers

𝗙𝗥𝗘𝗘 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 𝗙𝗿𝗼𝗺 𝗧𝗼𝗽 𝗖𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀😍 Top Companies Offering FREE Certification Courses To Upskill In 2025  Google:- https://pdlink.in/3YsujTV Microsoft :- https://pdlink.in/4jpmI0I Cisco :- https://pdlink.in/4fYr1xO HP :- https://pdlink.in/3DrNsxI IBM :- https://pdlink.in/44GsWoC Qualc :- https://pdlink.in/3YrFTyK TCS :- https://pdlink.in/4cHavCa Infosys :- https://pdlink.in/4jsHZXf Enroll For FREE & Get Certified 🎓

𝟱 𝗙𝗿𝗲𝗲 𝗠𝗜𝗧 𝗗𝗮𝘁𝗮 𝗔𝗻𝗮𝗹𝘆𝘁𝗶𝗰𝘀 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝗧𝗵𝗮𝘁 𝗪𝗶𝗹𝗹 𝗕𝗼𝗼𝘀𝘁 𝗬𝗼𝘂𝗿 𝗖𝗮𝗿𝗲𝗲𝗿😍 📊 Want to Learn Data Analytics but Hate the High Price Tags?💰📌 Good news: MIT is offering free, high-quality data analytics courses through their OpenCourseWare platform💻🎯 𝐋𝐢𝐧𝐤👇:- https://pdlink.in/4iXNfS3 All The Best 🎊

SQL Interview Questions for 0-1 year of Experience (Asked in Top Product-Based Companies). Sharpen your SQL skills with these real interview questions! Q1. Customer Purchase Patterns - You have two tables, Customers and Purchases: CREATE TABLE Customers ( customer_id INT PRIMARY KEY, customer_name VARCHAR(255) ); CREATE TABLE Purchases ( purchase_id INT PRIMARY KEY, customer_id INT, product_id INT, purchase_date DATE ); Assume necessary INSERT statements are already executed. Write an SQL query to find the names of customers who have purchased more than 5 different products within the last month. Order the result by customer_name. Q2. Call Log Analysis - Suppose you have a CallLogs table: CREATE TABLE CallLogs ( log_id INT PRIMARY KEY, caller_id INT, receiver_id INT, call_start_time TIMESTAMP, call_end_time TIMESTAMP ); Assume necessary INSERT statements are already executed. Write a query to find the average call duration per user. Include only users who have made more than 10 calls in total. Order the result by average duration descending. Q3. Employee Project Allocation - Consider two tables, Employees and Projects: CREATE TABLE Employees ( employee_id INT PRIMARY KEY, employee_name VARCHAR(255), department VARCHAR(255) ); CREATE TABLE Projects ( project_id INT PRIMARY KEY, lead_employee_id INT, project_name VARCHAR(255), start_date DATE, end_date DATE ); Assume necessary INSERT statements are already executed. The goal is to write an SQL query to find the names of employees who have led more than 3 projects in the last year. The result should be ordered by the number of projects led.

𝟰 𝗙𝗿𝗲𝗲 𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗲 𝗪𝗲𝗯𝘀𝗶𝘁𝗲𝘀 𝘁𝗼 𝗦𝗵𝗮𝗿𝗽𝗲𝗻 𝗬𝗼𝘂𝗿 𝗗𝗮𝘁𝗮 𝗔𝗻𝗮𝗹𝘆𝘁𝗶𝗰𝘀 𝗦𝗸𝗶𝗹𝗹𝘀 𝗶𝗻 𝟮𝟬𝟮𝟱😍 🎯 Want to Sharpen Your Data Analytics Skills with Hands-On Practice?📊 Watching tutorials can only take you so far—practical application is what truly builds confidence and prepares you for the real world🚀 𝐋𝐢𝐧𝐤👇:- https://pdlink.in/3GQGR1B Start practicing what actually gets you hired✅️

Kavitha's Journey to become a Data Engineer 👇👇 1. Startup to Dream Job Journey: - Started at a startup in India, transitioned to Infosys, then grabbed UK opportunity. - Shifted from legacy Mainframe to AWS Cloud, pursued Master's from illinoisstateu, and secured dream job at Statefarm. 2. Learn Fundamentals: - Assess skills, understand role. - Gain proficiency in Python, SQL. - Learn data technologies. 3. Database and Modeling Skills: - Understand databases, gain proficiency. - Learn data modeling principles. 4. Master ETL, Warehousing, and Visualization: - Understand ETL, data warehousing. - Gain experience in building warehouses. - Familiarize with visualization tools. - Got Certified as AWS Solutions Architect. 5. Utilize LinkedIn for Job Search: - Network and connect with professionals. - Showcase skills and achievements. - Utilize job search feature, leading to dream job at Statefarm. Data Engineering Interview Preparation Resources: https://whatsapp.com/channel/0029Vaovs0ZKbYMKXvKRYi3C

𝟱 𝗙𝗿𝗲𝗲 𝗠𝗜𝗧 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝗧𝗵𝗮𝘁 𝗘𝘃𝗲𝗿𝘆 𝗕𝗲𝗴𝗶𝗻𝗻𝗲𝗿 𝗦𝗵𝗼𝘂𝗹𝗱 𝗦𝘁𝗮𝗿𝘁 𝗪𝗶𝘁𝗵😍 💻 Want to Learn Coding but Don’t Know Where to Start?🎯 Whether you’re a student, career switcher, or complete beginner, this curated list is your perfect launchpad into tech💻🚀 𝐋𝐢𝐧𝐤👇:- https://pdlink.in/437ow7Y All The Best 🎊

🚦Top 10 Data Science Tools🚦 Here we will examine the top best Data Science tools that are utilized generally by data researchers and analysts. But prior to beginning let us discuss about what is Data Science. 🛰What is Data Science ? Data science is a quickly developing field that includes the utilization of logical strategies, calculations, and frameworks to extract experiences and information from organized and unstructured data . 🗽Top Data Science Tools that are normally utilized : 1.) Jupyter Notebook : Jupyter Notebook is an open-source web application that permits clients to make and share archives that contain live code, conditions, representations, and narrative text . 2.) Keras : Keras is a famous open-source brain network library utilized in data science. It is known for its usability and adaptability. Keras provides a range of tools and techniques for dealing with common data science problems, such as overfitting, underfitting, and regularization. 3.) PyTorch : PyTorch is one more famous open-source AI library utilized in information science. PyTorch also offers easy-to-use interfaces for various tasks such as data loading, model building, training, and deployment, making it accessible to beginners as well as experts in the field of machine learning. 4.) TensorFlow : TensorFlow allows data researchers to play out an extensive variety of AI errands, for example, image recognition , natural language processing , and deep learning. 5.) Spark : Spark allows data researchers to perform data processing tasks like data control, investigation, and machine learning , rapidly and effectively. 6.) Hadoop : Hadoop provides a distributed file system (HDFS) and a distributed processing framework (MapReduce) that permits data researchers to handle enormous datasets rapidly. 7.) Tableau : Tableau is a strong data representation tool that permits data researchers to make intuitive dashboards and perceptions. Tableau allows users to combine multiple charts. 8.) SQL : SQL (Structured Query Language) SQL permits data researchers to perform complex queries , join tables, and aggregate data, making it simple to extricate bits of knowledge from enormous datasets. It is a powerful tool for data management, especially for large datasets. 9.) Power BI : Power BI is a business examination tool that conveys experiences and permits clients to make intuitive representations and reports without any problem. 10.) Excel : Excel is a spreadsheet program that broadly utilized in data science. It is an amazing asset for information the board, examination, and visualization .Excel can be used to explore the data by creating pivot tables, histograms, scatterplots, and other types of visualizations.

𝗧𝗼𝗽 𝗣𝘆𝘁𝗵𝗼𝗻 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄 𝗤𝘂𝗲𝘀𝘁𝗶𝗼𝗻𝘀 𝗳𝗼𝗿 𝟮𝟬𝟮𝟱 — 𝗥𝗲𝗰𝗲𝗻𝘁𝗹𝘆 𝗔𝘀𝗸𝗲𝗱 𝗯𝘆 𝗠𝗡𝗖𝘀😍 📌 Preparing for Python Interviews in 2025?🗣 If you’re aiming for roles in data analysis, backend development, or automation, Python is your key weapon—and so is preparing with the right questions.💻✨️ 𝐋𝐢𝐧𝐤👇:- https://pdlink.in/3ZbAtrW Crack your next Python interview✅️

Few topics that you need to cover for Kafka interview: 1. Topic - Partition - Message ordering - Replication - Offset - Compression 2. Producer - Serialization - Batching - Compaction - Intervals - Sync & Async - Idempotence - Some important properties 3. Broker - Kafka cluster - Replication - Retention - Cleanup - Graceful shut down 4. Consumer - Deserialization - Consumer group - Consumption types - Sync & Async - Failure handling - Some important properties 5. Zookeeper 6. Schema registry 7. Admin client API, MakeMirror 8. Kafka Streams 9. Kafka Connect

𝗙𝗥𝗘𝗘 𝗠𝗶𝗰𝗿𝗼𝘀𝗼𝗳𝘁 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 😍 Feeling like your resume could use a boost? 🚀 Let’s make that happen with Microsoft Azure certifications that are not only perfect for beginners but also completely free!🔥💯 𝐋𝐢𝐧𝐤👇:- https://pdlink.in/4iVRmiQ Essential skills for today’s tech-driven world✅️

Data Science Techniques

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Data Lake vs Data Warehouse

DevOps Tech Stack

𝗠𝗶𝗰𝗿𝗼𝘀𝗼𝗳𝘁 𝟭𝟬𝟬% 𝗙𝗿𝗲𝗲 𝗖𝗼𝘂𝗿𝘀𝗲𝘀 𝗳𝗼𝗿 𝗔𝘇𝘂𝗿𝗲, 𝗔𝗜, 𝗖𝘆𝗯𝗲𝗿𝘀𝗲𝗰𝘂𝗿𝗶𝘁𝘆 & 𝗠𝗼𝗿𝗲😍 Want to upskill in Azure, AI, Cybersecurity, or App Development—without spending a single rupee?👨‍💻🎯 Enter Microsoft Learn — a 100% free platform that offers expert-led learning paths to help you grow📊📌 𝐋𝐢𝐧𝐤👇:- https://pdlink.in/4k6lA2b Enjoy Learning ✅️

𝗗𝗮𝘁𝗮 𝗔𝗻𝗮𝗹𝘆𝘁𝗶𝗰𝘀 𝗩𝗶𝗿𝘁𝘂𝗮𝗹 𝗜𝗻𝘁𝗲𝗿𝗻𝘀𝗵𝗶𝗽 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝘀 𝗜𝗻 𝗧𝗼𝗽 𝗖𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀😍 1️⃣ BCG Data Science & Analytics Virtual Experience 2️⃣ TATA Data Visualization Internship 3️⃣ Accenture Data Analytics Virtual Internship 𝐋𝐢𝐧𝐤👇:- https://pdlink.in/409RHXN Enroll for FREE & Get Certified 🎓

Azure Data Engineer interview questions: Project Questions: 1) Tell me about your project. Explain it end to end. 2) On what measure you have mentioned about the storage cost decreased and cost optimization has been done? ADF and ADLS 1) There are 10 million CSV files in ADLS Gen2. How will you read them and process using Azure Data Factory? Explain in detail what and all would be used. 2) What is Integration Runtime? 3) What is variable and parameter in ADF? 4) Explain different activities and brief about what each activity does. 5) The pipeline is scheduled and it got failed. I need to automate it by sending the mail when it gets failed. How would you implement it? 6) How do you handle the exceptions in ADF? 7) If the ADF pipeline is running very slow, how would you approach and fix it? 8) What is the difference between Blob storage and ADLS Gen2? Why ADLS Gen2 is required? Azure Databricks 9) How do you connect ADLS Gen 2 with databricks? In where we mention the role assignments? 10) If you are using Service Principal to connect with ADLS from Azure Databricks explain the steps and how would you code it? 11) Why using service principal? How would you create it? 12) What is Databricks runtime? Why we need it? 13) What are Workflows? 14) Explain about the Medallion Architecture in brief. 15) Explain about Delta file format briefly. 16) Consider you are working in Facebook. User is writing data for each record. Since each record is been written, a new json transaction log will get created for each write. But we can use Datalake only right. Why do we require delta file format? It can decrease the performance every now and then right? 17) Consider a job is running very slow in Azure Databricks. How would you approach the issue and make it faster? 18) What are the optimization techniques you have worked on? Explain them in brief. 19) How would you optimize the job with respect to memory management in azure databricks?