Data Engineers
Ir al canal en Telegram
Free Data Engineering Ebooks & Courses
Mostrar más10 326
Suscriptores
+624 horas
+557 días
+22230 días
Carga de datos en curso...
Canales Similares
Nube de Etiquetas
Menciones Entrantes y Salientes
---
---
---
---
---
---
Atraer Suscriptores
junio '26
junio '26
+20
en 0 canales
mayo '26
+251
en 3 canales
Get PRO
abril '26
+283
en 1 canales
Get PRO
marzo '26
+170
en 2 canales
Get PRO
febrero '26
+177
en 3 canales
Get PRO
enero '26
+232
en 3 canales
Get PRO
diciembre '25
+188
en 0 canales
Get PRO
noviembre '25
+207
en 4 canales
Get PRO
octubre '25
+259
en 2 canales
Get PRO
septiembre '25
+207
en 2 canales
Get PRO
agosto '25
+273
en 4 canales
Get PRO
julio '25
+231
en 3 canales
Get PRO
junio '25
+231
en 7 canales
Get PRO
mayo '25
+146
en 9 canales
Get PRO
abril '25
+281
en 6 canales
Get PRO
marzo '25
+336
en 5 canales
Get PRO
febrero '25
+103
en 9 canales
Get PRO
enero '25
+283
en 13 canales
Get PRO
diciembre '24
+313
en 4 canales
Get PRO
noviembre '24
+629
en 7 canales
Get PRO
octubre '24
+726
en 8 canales
Get PRO
septiembre '24
+921
en 14 canales
Get PRO
agosto '24
+1 280
en 9 canales
Get PRO
julio '24
+1 260
en 16 canales
Get PRO
junio '24
+650
en 9 canales
Get PRO
mayo '24
+759
en 14 canales
Get PRO
abril '24
+166
en 0 canales
Get PRO
marzo '24
+225
en 0 canales
Get PRO
febrero '24
+809
en 0 canales
| Fecha | Crecimiento de Suscriptores | Menciones | Canales | |
| 03 junio | +9 | |||
| 02 junio | +6 | |||
| 01 junio | +5 |
Publicaciones del Canal
🚀Greetings from PVR Cloud Tech!! 🌈
🔥 Do you want to become a Master in Azure Cloud Data Engineering?
If you're ready to build in-demand skills and unlock exciting career opportunities, this is the perfect place to start!
📌 Start Date: 1st June 2026
⏰ Time: 09 PM – 10 PM IST | Monday
🔗 𝐈𝐧𝐭𝐞𝐫𝐞𝐬𝐭𝐞𝐝 𝐢𝐧 𝐀𝐳𝐮𝐫𝐞 𝐃𝐚𝐭𝐚 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐥𝐢𝐯𝐞 𝐬𝐞𝐬𝐬𝐢𝐨𝐧𝐬?
👉 Message us on WhatsApp:
https://wa.me/917032678595?text=Interested_to_join_Azure_Data_Engineering_live_sessions
🔹 Course Content:
https://drive.google.com/file/d/1QKqhRMHx2SDNDTmPAf3₅4fA6LljKHm6/view
📱 Join WhatsApp Group:
https://chat.whatsapp.com/EZghn5PVmryDgJZ1TjIMRk
📥 Register Now:
https://forms.gle/LidHPdfxvNeg9LpeA
Team
PVR Cloud Tech :)
+91-9346060794
| 2 | 🚀 Top Skills Every Data Engineer Should Learn 📊🔥
🧠 1. SQL Mastery
✔ Complex Queries
✔ JOINS & Window Functions
✔ Query Optimization
✔ Data Modeling
✔ Stored Procedures
🐍 2. Programming Skills
✔ Python for Automation
✔ APIs & JSON
✔ Data Processing Scripts
✔ Error Handling
🛠 Libraries to Learn:
✔ Pandas
✔ PySpark
✔ Requests
⚡ 3. ETL & Data Pipelines
✔ Extract, Transform, Load
✔ Workflow Automation
✔ Scheduling Jobs
✔ Monitoring Pipelines
🛠 Tools to Learn:
✔ Apache Airflow
✔ dbt
✔ Prefect
☁️ 4. Cloud Platforms
✔ Cloud Storage
✔ Data Lakes
✔ Scalable Processing
✔ Cloud Security Basics
🛠 Platforms to Learn:
✔ AWS
✔ Microsoft Azure
✔ Google Cloud Platform
📊 5. Big Data Technologies
✔ Distributed Computing
✔ Real-Time Streaming
✔ Batch Processing
✔ Scalable Systems
🛠 Technologies to Learn:
✔ Apache Spark
✔ Hadoop
✔ Apache Kafka
🗄 6. Databases & Warehousing
✔ Relational Databases
✔ NoSQL Databases
✔ Data Warehouses
✔ Schema Design
🛠 Databases to Learn:
✔ PostgreSQL
✔ MongoDB
✔ Snowflake
✔ BigQuery
🔄 7. DevOps & Deployment
✔ Version Control
✔ Containerization
✔ CI/CD Basics
✔ Deployment Automation
🛠 Tools to Learn:
✔ Git
✔ Docker
✔ Kubernetes
💡 Data Engineers don’t just move data… they build the backbone of modern AI & analytics systems.
💬 Tap ❤️ if this helped you! | 1 078 |
| 3 | 📈 FREE Live Masterclass for Future Business Analysts!
📊 4 Steps to Become a Successful Business Analyst in 2026
📅 May 20th, 2026
⏰ 7:00 PM
🌐 English
🎟️ 90 Minutes of Career Guidance & Industry Insights
💡 Learn:
✔ Core Business Analytics Skills & AI usage
✔ Real-World Case Studies
✔ Career Roadmap for 2026
✔ Tools Used by Top Companies
🔥 Perfect for:
Students | Freshers | Working Professionals | Career Switchers
📌 Register Now:
https://rebrand.ly/Business-analyst-webinar | 1 140 |
| 4 | What is the difference between data scientist, data engineer, data analyst and business intelligence?
🧑🔬 Data Scientist
Focus: Using data to build models, make predictions, and solve complex problems.
Cleans and analyzes data
Builds machine learning models
Answers “Why is this happening?” and “What will happen next?”
Works with statistics, algorithms, and coding (Python, R)
Example: Predict which customers are likely to cancel next month
🛠️ Data Engineer
Focus: Building and maintaining the systems that move and store data.
Designs and builds data pipelines (ETL/ELT)
Manages databases, data lakes, and warehouses
Ensures data is clean, reliable, and ready for others to use
Uses tools like SQL, Airflow, Spark, and cloud platforms (AWS, Azure, GCP)
Example: Create a system that collects app data every hour and stores it in a warehouse
📊 Data Analyst
Focus: Exploring data and finding insights to answer business questions.
Pulls and visualizes data (dashboards, reports)
Answers “What happened?” or “What’s going on right now?”
Works with SQL, Excel, and tools like Tableau or Power BI
Less coding and modeling than a data scientist
Example: Analyze monthly sales and show trends by region
📈 Business Intelligence (BI) Professional
Focus: Helping teams and leadership understand data through reports and dashboards.
Designs dashboards and KPIs (key performance indicators)
Translates data into stories for non-technical users
Often overlaps with data analyst role but more focused on reporting
Tools: Power BI, Looker, Tableau, Qlik
Example: Build a dashboard showing company performance by department
🧩 Summary Table
Data Scientist - What will happen? Tools: Python, R, ML tools, predictions & models
Data Engineer - How does the data move and get stored? Tools: SQL, Spark, cloud tools, infrastructure & pipelines
Data Analyst - What happened? Tools: SQL, Excel, BI tools, reports & exploration
BI Professional - How can we see business performance clearly? Tools: Power BI, Tableau, dashboards & insights for decision-makers
🎯 In short:
Data Engineers build the roads.
Data Scientists drive smart cars to predict traffic.
Data Analysts look at traffic data to see patterns.
BI Professionals show everyone the traffic report on a screen. | 1 708 |
| 5 | ✅ Skills Required to Become a Data Engineer ⚙️🚀
🧠 PROGRAMMING
1. Python (Data Pipelines)
2. Java / Scala
3. Object-Oriented Programming
4. Scripting (Automation)
5. Debugging Skills
6. Code Optimization
7. API Handling
8. Version Control (Git)
🗄️ DATABASES
1. SQL (Advanced Queries)
2. NoSQL (MongoDB, Cassandra)
3. Database Design
4. Data Modeling
5. Indexing Partitioning
6. Query Optimization
7. Data Warehousing
8. OLTP vs OLAP
⚙️ ETL / ELT
1. Data Extraction
2. Data Transformation
3. Data Loading
4. Pipeline Building
5. Workflow Automation
6. Data Integration
7. Batch Processing
8. Real-time Processing
☁️ BIG DATA TECHNOLOGIES
1. Hadoop
2. Spark
3. Kafka
4. Hive
5. Flink
6. Distributed Systems
7. Cluster Computing
8. Stream Processing
☁️ CLOUD PLATFORMS
1. AWS (S3, Redshift, Glue)
2. Azure (Data Factory, Synapse)
3. Google Cloud (BigQuery)
4. Cloud Storage
5. Serverless Architecture
6. Data Lakes
7. Security IAM
8. Cost Optimization
📊 DATA PIPELINES
1. Building Scalable Pipelines
2. Data Orchestration (Airflow)
3. Scheduling Jobs
4. Monitoring Pipelines
5. Error Handling
6. Logging Systems
7. Data Reliability
8. Performance Tuning
🧱 DATA ARCHITECTURE
1. Data Lakes
2. Data Warehouses
3. Lakehouse Architecture
4. Schema Design
5. Data Governance
6. Data Security
7. Metadata Management
8. Scalability Planning
🔍 DEVOPS TOOLS
1. Docker
2. Kubernetes
3. CI/CD Pipelines
4. Linux Basics
5. Shell Scripting
6. Git GitHub
7. Monitoring Tools
8. Infrastructure as Code
💬 Tap ❤️ if this helped you follow for more Data Engineering content! | 1 874 |
| 6 | Every day you login... Work.. and logout.
Days become months.
Months become years.
But nothing changes.
Same role. Same work. Same pay.
Meanwhile, others are moving into Cloud & Data Engineering…
building real systems and earning better.
If you are looking to get into Azure Data Engineering then..
𝗝𝗼𝗶𝗻 𝘁𝗵𝗲 3 months 𝗟𝗶𝘃𝗲 𝗣𝗿𝗼𝗴𝗿𝗮𝗺
📌 Start Date: 20th April 2026
⏰ Time: 9 PM – 10 PM IST | Monday
👉 𝐌𝐞𝐬𝐬𝐚𝐠𝐞 𝐮𝐬 𝐨𝐧 𝐖𝐡𝐚𝐭𝐬𝐀𝐩𝐩:
https://wa.me/917032678595?text=Interested_to_join_Azure_Data_Engineering_live_sessions
🔹 𝗥𝗲𝗴𝗶𝘀𝘁𝗲𝗿 𝗵𝗲𝗿𝗲:
https://forms.gle/DRXEhvyG9ENDsNYR9
🎟️ 𝗝𝗼𝗶𝗻 𝗪𝗵𝗮𝘁𝘀𝗔𝗽𝗽 𝗚𝗿𝗼𝘂𝗽:
https://chat.whatsapp.com/GCG3Si7vhrJD1evV9NAbhL
🏀 𝗖𝗼𝘂𝗿𝘀𝗲 𝗖𝗼𝗻𝘁𝗲𝗻𝘁:
https://drive.google.com/file/d/1QKqhRMHx2SDNDTmPAf3_54fA6LljKHm6/view | 514 |
| 7 | 🧠 SQL Interview Question (Running Total of Sales)
📌
sales(order_id, order_date, amount)
❓ Ques :
👉 Calculate the running total of sales for each day
👉 Return order_date, daily_sales, running_total
🧩 How Interviewers Expect You to Think
• Aggregate sales per day 📊
• Use window function for cumulative sum
• Order data correctly for running calculation
💡 SQL Solution
WITH daily_sales AS (
SELECT
order_date,
SUM(amount) AS daily_sales
FROM sales
GROUP BY order_date
)
SELECT
order_date,
daily_sales,
SUM(daily_sales) OVER (
ORDER BY order_date
) AS running_total
FROM daily_sales;
🔥 Why This Question Is Powerful
• Tests window functions (must-know) 🧠
• Very common in real-world reporting
• Frequently asked in analyst & BI roles
❤️ React for more SQL interview questions 🚀 | 1 994 |
| 8 | 🔰 Python function with an example | 1 709 |
| 9 | WhatsApp is no longer a platform just for chat.
It's an educational goldmine.
If you do, you’re sleeping on a goldmine of knowledge and community. WhatsApp channels are a great way to practice data science, make your own community, and find accountability partners.
I have curated the list of best WhatsApp channels to learn coding & data science for FREE
Free Courses with Certificate
👇👇
https://whatsapp.com/channel/0029VasiTTi8qIzujE8Lad0H
Jobs & Internship Opportunities
👇👇
https://whatsapp.com/channel/0029VaI5CV93AzNUiZ5Tt226
Web Development
👇👇
https://whatsapp.com/channel/0029VaiSdWu4NVis9yNEE72z
Python Free Books & Projects
👇👇
https://whatsapp.com/channel/0029VaiM08SDuMRaGKd9Wv0L
Java Free Resources
👇👇
https://whatsapp.com/channel/0029VamdH5mHAdNMHMSBwg1s
Coding Interviews
👇👇
https://whatsapp.com/channel/0029VammZijATRSlLxywEC3X
SQL For Data Analysis
👇👇
https://whatsapp.com/channel/0029VanC5rODzgT6TiTGoa1v
Power BI Resources
👇👇
https://whatsapp.com/channel/0029Vai1xKf1dAvuk6s1v22c
Programming Free Resources
👇👇
https://whatsapp.com/channel/0029VahiFZQ4o7qN54LTzB17
Data Science Projects
👇👇
https://whatsapp.com/channel/0029Va4QUHa6rsQjhITHK82y
Learn Data Science & Machine Learning
👇👇
https://whatsapp.com/channel/0029Va8v3eo1NCrQfGMseL2D
Coding Projects
👇👇
https://whatsapp.com/channel/0029VamhFMt7j6fx4bYsX908
Excel for Data Analyst
👇👇
https://whatsapp.com/channel/0029VaifY548qIzv0u1AHz3i
ENJOY LEARNING 👍👍 | 2 062 |
| 10 | 🚀 Microsoft Fabric – Most In-Demand Technology
Upgrade your skills with Microsoft Fabric and stay ahead in modern data platforms, real-time analytics, and end-to-end data solutions.
🔗 Join WhatsApp Group:
https://chat.whatsapp.com/KUtaLEliyb240g3UpdIS2U
For more information, join the group and stay updated with the latest insights.
Limited spots available – Join now. | 1 618 |
| 11 | Thinking about becoming a Data Engineer? Here's the roadmap to avoid pitfalls & master the essential skills for a successful career.
📊Introduction to Data Engineering
✅Overview of Data Engineering & its importance
✅Key responsibilities & skills of a Data Engineer
✅Difference between Data Engineer, Data Scientist & Data Analyst
✅Data Engineering tools & technologies
📊Programming for Data Engineering
✅Python
✅SQL
✅Java/Scala
✅Shell scripting
📊Database System & Data Modeling
✅Relational Databases: design, normalization & indexing
✅NoSQL Databases: key-value stores, document stores, column-family stores & graph database
✅Data Modeling: conceptual, logical & physical data model
✅Database Management Systems & their administration
📊Data Warehousing and ETL Processes
✅Data Warehousing concepts: OLAP vs. OLTP, star schema & snowflake schema
✅ETL: designing, developing & managing ETL processe
✅Tools & technologies: Apache Airflow, Talend, Informatica, AWS Glue
✅Data lakes & modern data warehousing solution
📊Big Data Technologies
✅Hadoop ecosystem: HDFS, MapReduce, YARN
✅Apache Spark: core concepts, RDDs, DataFrames & SparkSQL
✅Kafka and real-time data processing
✅Data storage solutions: HBase, Cassandra, Amazon S3
📊Cloud Platforms & Services
✅Introduction to cloud platforms: AWS, Google Cloud Platform, Microsoft Azure
✅Cloud data services: Amazon Redshift, Google BigQuery, Azure Data Lake
✅Data storage & management on the cloud
✅Serverless computing & its applications in data engineering
📊Data Pipeline Orchestration
✅Workflow orchestration: Apache Airflow, Luigi, Prefect
✅Building & scheduling data pipelines
✅Monitoring & troubleshooting data pipelines
✅Ensuring data quality & consistency
📊Data Integration & API Development
✅Data integration techniques & best practices
✅API development: RESTful APIs, GraphQL
✅Tools for API development: Flask, FastAPI, Django
✅Consuming APIs & data from external sources
📊Data Governance & Security
✅Data governance frameworks & policies
✅Data security best practices
✅Compliance with data protection regulations
✅Implementing data auditing & lineage
📊Performance Optimization & Troubleshooting
✅Query optimization techniques
✅Database tuning & indexing
✅Managing & scaling data infrastructure
✅Troubleshooting common data engineering issues
📊Project Management & Collaboration
✅Agile methodologies & best practices
✅Version control systems: Git & GitHub
✅Collaboration tools: Jira, Confluence, Slack
✅Documentation & reporting
Resources for Data Engineering
1️⃣Python: https://t.me/pythonanalyst
2️⃣SQL: https://t.me/sqlanalyst
3️⃣Excel: https://t.me/excel_analyst
4️⃣Free DE Courses: https://t.me/free4unow_backup/569
Data Engineering Interview Preparation Resources: https://topmate.io/analyst/910180
All the best 👍👍 | 1 482 |
| 12 | 🚀Greetings from PVR Cloud Tech!! 🌈
🔥 Do you want to become a Master in Azure Cloud Data Engineering?
If you're ready to build in-demand skills and unlock exciting career opportunities,
this is the perfect place to start!
📌 Start Date: 23rd March 2026
⏰ Time: 07 AM – 08 AM IST | Monday
🔗 𝐈𝐧𝐭𝐞𝐫𝐞𝐬𝐭𝐞𝐝 𝐢𝐧 𝐀𝐳𝐮𝐫𝐞 𝐃𝐚𝐭𝐚 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐥𝐢𝐯𝐞 𝐬𝐞𝐬𝐬𝐢𝐨𝐧𝐬?
👉 Message us on WhatsApp:
https://wa.me/917032678595?text=Interested_to_join_Azure_Data_Engineering_live_sessions
🔹 Course Content:
https://drive.google.com/file/d/1QKqhRMHx2SDNDTmPAf3_54fA6LljKHm6/view
📱 Join WhatsApp Group:
https://chat.whatsapp.com/GCdcWr7v5JI1taguJrgU9j
📥 Register Now:
https://forms.gle/f3t9Ao2DRGMkyBdC9
📺 WhatsApp Channel:
https://www.whatsapp.com/channel/0029Vb60rGU8V0thkpbFFW2n
Team
PVR Cloud Tech :)
+91-9346060794 | 350 |
| 13 | 📊 1️⃣0️⃣ Walk through an end-to-end data pipeline you've built
✅ Strong Answer:
"Built customer 360 pipeline: Kafka → Debezium CDC → S3 raw zone → PySpark silver (cleaning, dedup) → dbt gold (business logic) → Snowflake mart. Airflow DAG orchestrated 50+ tasks. Delta Lake for ACID. Streaming dashboard latency: 6h → 15min. Cost: $120k/mo → $38k/mo (68% savings). 1B events/day processed."
🔥 1️⃣1️⃣ How do you monitor and alert on data pipeline failures?
✅ Answer:
Monitoring stack:
- Data quality: Great Expectations, dbt tests
- Pipeline health: Airflow SLA misses, task failures
- Data freshness: Lag metrics (max(event_time) vs now())
- Volume anomalies: Statistical alerts (±3σ)
Tools: Datadog, PagerDuty, Slack notifications.
Example: dbt test --store-failures --alert slack.
📊 1️⃣2️⃣ What is the medallion architecture? Bronze/Silver/Gold layers
✅ Answer:
Medallion (Databricks): Raw → Clean → Curated.
- Bronze: Raw landing zone (schema-on-read).
- Silver: Cleaned, deduplicated, enriched.
- Gold: Business-ready marts (aggregations, joins).
Example: bronze_events → silver_events (dedup) → gold_customer_daily (business KPIs).
🧠 1️⃣3️⃣ Compare ACID transactions across different data systems
✅ Answer:
- Traditional RDBMS: Full ACID.
- Data Lakes: None (eventual consistency).
- Delta Lake/Iceberg: ACID via transaction log.
- Snowflake: Time Travel ACID (query past states).
- Kafka: Exactly-once with idempotent producers.
Choose based on consistency vs scale needs.
📈 1️⃣4️⃣ How do you optimize Spark jobs for cost and performance?
✅ Answer:
Cost: Auto-scaling clusters, spot instances, partition pruning.
Performance:
- Cache/persist intermediate results
- Broadcast small tables for JOINs
- Predicate pushdown (filter before join)
- Adaptive query execution (AQE)
- Z-order clustering
Monitor: Spark UI, Ganglia, query profiles.
📊 1️⃣5️⃣ What tools and tech stack do you use daily?
✅ Answer:
- Orchestration: Airflow, Prefect, Dagster
- Processing: PySpark, dbt, DuckDB
- Storage: S3, Snowflake, Delta Lake, PostgreSQL
- Streaming: Kafka, Flink, Kinesis
- Cloud: AWS/GCP/Azure (EMR, Databricks, VertexAI)
- Monitoring: Datadog, Grafana, Great Expectations
💼 1️⃣6️⃣ Describe a challenging data engineering problem you solved
✅ Answer:
"Production pipeline failed silently dropping 30% events due to Kafka consumer lag (7-day backlog). Root cause: Spark Structured Streaming micro-batch outpacing consumer group.
Fix: Dynamic partitioning by watermark, exactly-once semantics, consumer group rebalancing. Added dead letter queue, lag monitoring alerts.
Result: 99.99% delivery guarantee, processing resumed in 4 hours vs 7 days. Implemented chaos testing for future resilience."
Double Tap ❤️ For More | 941 |
| 14 | 🎯 🔧 DATA ENGINEER INTERVIEW QUESTIONS WITH ANSWERS
🧠 1️⃣ Tell me about your data engineering experience and key projects
✅ Sample Answer:
"I have 4+ years as a data engineer building scalable ETL pipelines, data lakes, and real-time streaming systems. Expert in PySpark, Airflow, Snowflake, Kafka, and dbt. Recently built a 10TB customer 360 pipeline processing 1B+ events daily with 99.99% uptime. Reduced data latency from 6 hours to 15 minutes using streaming and optimized warehouse costs by 68% through partitioning and Z-ordering."
📊 2️⃣ What is the difference between batch processing and stream processing? When to use each?
✅ Answer:
Batch: Process large volumes at scheduled intervals (hourly/daily). Use for reports, ML training, data warehousing. Tools: Airflow, Spark batch jobs.
Stream: Process data in real-time as it arrives. Use for fraud detection, live dashboards, recommendations. Tools: Kafka Streams, Flink, Spark Streaming.
Hybrid: Lambda architecture (batch + stream layers).
🔗 3️⃣ Explain ETL vs ELT. What factors determine your choice?
✅ Answer:
ETL (Extract→Transform→Load): Transform in staging layer, load clean data to warehouse. Good for simple transformations, low-volume, strict data quality.
ELT (Extract→Load→Transform): Load raw data, transform in warehouse. Better for cloud warehouses (Snowflake, BigQuery), complex transformations, data lake use cases.
Choose ELT for modern stacks (80% current jobs), ETL for legacy/strict compliance.
🧠 4️⃣ What is a data lake vs data warehouse? When would you use each?
✅ Answer:
Data Lake: Raw, semi-structured data at scale (S3, ADLS). Schema-on-read, good for ML, data science, unknown future use cases.
Data Warehouse: Clean, structured data optimized for analytics (Snowflake, Redshift). Schema-on-write, SQL analytics, BI dashboards.
Use lake for raw storage + warehouse for consumption. Lakehouse (Databricks) combines both.
📈 5️⃣ How do you design idempotent data pipelines?
✅ Answer:
Idempotent: Run multiple times → same result.
Techniques:
- Unique keys/checksums for deduplication
- Upsert (MERGE) instead of INSERT
- Watermarking (process only new data)
- Transactional outbox pattern
- Exactly-once Kafka semantics
Example: MERGE target t USING staging s ON t.id = s.id WHEN MATCHED THEN UPDATE WHEN NOT MATCHED THEN INSERT
📊 6️⃣ What is Apache Airflow? Key components and DAG best practices
✅ Answer:
Airflow: Workflow orchestration platform. DAGs (Directed Acyclic Graphs) define pipeline dependencies.
Components: Scheduler, Webserver, Metadata DB, Workers (Celery/Kubernetes).
Best practices:
- Small, focused tasks (<15min)
- Idempotent tasks
- Retry logic + SLAs
- XComs for lightweight data passing
- Dynamic DAGs via Jinja templating
📉 7️⃣ Explain partitioning vs bucketing vs clustering in big data systems
✅ Answer:
Partitioning: Split data by column values (date, region) → directory structure. Prunes I/O for queries.
Bucketing: Hash-based file grouping within partitions. Optimizes JOINs (same bucket).
Clustering: Multi-dimensional sorting (Snowflake Z-order). Dynamic, query-optimized.
Example: PARTITIONED BY (year, month) CLUSTERED BY (customer_id) balances prune + sort.
📊 8️⃣ How do you handle schema evolution in data pipelines?
✅ Answer:
Schema evolution: Handle changing upstream data structures.
Strategies:
- Avro/Protobuf (schema in file metadata)
- dbt schema.yml + tests
- Delta Lake/Apache Iceberg (ACID + schema evolution)
- Flexible staging layer (JSON → structured)
- Versioned tables (table_v1, table_v2)
🧠 9️⃣ What is Spark? Compare DataFrames vs RDDs vs Datasets
✅ Answer:
Spark: Distributed data processing engine.
RDD: Low-level, resilient distributed datasets (Python objects).
DataFrame: Structured, optimized (Tungsten + Catalyst).
Dataset: Type-safe DataFrame (Scala/Java only\ | 924 |
| 15 | ⚙️ NoSQL Developer Roadmap
📂 NoSQL Fundamentals (Key Concepts, CAP Theorem)
∟📂 Types of NoSQL (Document, Key-Value, Column-Family, Graph)
∟📂 Document Stores (MongoDB: Collections, Documents, JSON/BSON)
∟📂 Key-Value Stores (Redis: Strings, Hashes, Lists, Sets)
∟📂 Column-Family (Cassandra: Keyspaces, Tables, CQL)
∟📂 Graph Databases (Neo4j: Nodes, Relationships, Cypher)
∟📂 CRUD Operations (Create, Read, Update, Delete)
∟📂 Indexing & Query Optimization
∟📂 Aggregation Pipelines (MongoDB)
∟📂 Replication & Sharding (Horizontal Scaling)
∟📂 Schema Design (Denormalization, Embedding vs Referencing)
∟📂 Consistency Models (Eventual vs Strong)
∟📂 Drivers & ORMs (PyMongo, Mongoose, Spring Data)
∟📂 Integration with SQL (Hybrid Apps)
∟📂 Monitoring & Performance Tuning
∟📂 Projects (Build Todo App, E-commerce Catalog, Social Graph)
∟✅ Apply for Backend / Fullstack / Big Data Roles
💬 Tap ❤️ for more! | 1 225 |
| 16 | Sure! Here’s the revised version with the requested changes:
Roadmap for becoming an Azure Data Engineer for free in 2026:
𝟭 - 𝗕𝗮𝘀𝗶𝗰𝘀 𝗼𝗳 𝗽𝘆𝘁𝗵𝗼𝗻: It is good to know at least essentials of Python if you are planning to become an Azure Data Engineer.
Learn Python Live For Free:
https://lnkd.in/dVYrJeEp
𝟮 - 𝗔𝘇𝘂𝗿𝗲 𝗖𝗹𝗼𝘂𝗱 𝗖𝗼𝗻𝗰𝗲𝗽𝘁: Knowing the cloud concept is a must to have skills in today's time for any profile.
Learn Azure Basics for Free here:
https://lnkd.in/da9kZEKK
𝟯 - 𝗦𝗤𝗟: One of the most essential prerequisites for any data profile. Free link:
https://lnkd.in/dmTTBQri
𝟰 - 𝗔𝘇𝘂𝗿𝗲 𝗗𝗮𝘁𝗮 𝗙𝗮𝗰𝘁𝗼𝗿𝘆: It is one of the most commonly used orchestration tools as an Azure Data Engineer.
Learn Azure Data Factory basics here:
https://lnkd.in/da9kZEKK
𝟱 - 𝗔𝘇𝘂𝗿𝗲 𝗗𝗮𝘁𝗮𝗯𝗿𝗶𝗰𝗸𝘀 / 𝗦𝗽𝗮𝗿𝗸 / 𝗽𝘆𝗦𝗽𝗮𝗿𝗸: It is powerful and one of the most important pieces in becoming a Data Engineer needed for Big Data analytics.
Learn from here:
https://lnkd.in/da9kZEKK
𝟲 - 𝗘𝗻𝗱 𝘁𝗼 𝗘𝗻𝗱 𝗣𝗿𝗼𝗷𝗲𝗰𝘁: Highly recommended to do at least 3 end-to-end real-world project implementations to master the concepts learned.
Get Real-world End-to-End Project from here:
https://lnkd.in/da9kZEKK
𝟳 - 𝗚𝗲𝗻 𝗔𝗜 𝗳𝗼𝗿 𝗗𝗮𝘁𝗮 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿: Learn basics of Generative AI like LLM, RAG from here:
https://lnkd.in/da9kZEKK
𝟴 - 𝗥𝗲𝘀𝘂𝗺𝗲 𝗣𝗿𝗲𝗽𝗮𝗿𝗮𝘁𝗶𝗼𝗻 𝗧𝗲𝗺𝗽𝗹𝗮𝘁𝗲: Resume template for 𝗙𝗿𝗲𝗲:
https://lnkd.in/d4gxV8Ni
𝟵 - 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄 𝗣𝗿𝗲𝗽𝗮𝗿𝗮𝘁𝗶🅾️n: Free mock interviews to practice:
Azure Data Engineer Interview - First Round
https://lnkd.in/dXAuq52r
Azure Data Engineer Interview - Project Specific
https://lnkd.in/d7CQ-_yF
Azure Data Engineer Interview - Scenario Based
https://lnkd.in/drk9GPMf
Azure Data Engineer Interview - New Questions
https://lnkd.in/ddaN78Ag
Azure Data Engineer interview - Tricky questions
https://lnkd.in/geU-gA8K
Azure Data Engineer Mock Interview 2025 with Feedback
https://lnkd.in/dXeUJ-gc
Azure Data Engineer Interview For Experienced
https://lnkd.in/dae4if4V
Summary:
• SQL
• Basic Python
• Cloud Fundamental
• ADF
• Databricks/Spark
• Dimensional Modelling
• Azure Fabric
• 3 End-to-End Projects
• Gen AI Basics
• Resume Preparation
• Interview Prep | 1 632 |
¡Ya disponible! Investigación de Telegram 2025 — los principales insights del año 
