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Publicaciones del Canal
â
*Core SQL Interview Questions With Answers - Part 4* đĽď¸
31 What are SQL Views
- Virtual tables based on query results
- Simplify complex queries
- Example: CREATE VIEW high_earners AS SELECT * FROM employees WHERE salary > 50000;
32 What is a Stored Procedure
- Pre-compiled SQL code block
- Reusable, reduces network traffic
- Example: CALL GetEmployeeReport(1001);
33 What are SQL Triggers
- Auto-execute on events (INSERT, UPDATE, DELETE)
- Enforce business rules automatically
- Example: Trigger to log salary changes;
34 Difference between DELETE and TRUNCATE
- DELETE removes specific rows, logs each
- TRUNCATE removes all rows, faster, no logging
- DELETE can use WHERE; TRUNCATE cannot;
35 What is ACID property
- Atomicity: All or nothing
- Consistency: Valid state always
- Isolation: Transactions independent
- Durability: Committed data persists;
36 What is Normalization
- Organize data to reduce redundancy
- 1NF, 2NF, 3NF levels
- Example: Split customer and address tables;
37 What is Denormalization
- Add redundancy for read performance
- Used in data warehouses
- Trade-off: faster queries vs storage;
38 What are Transactions
- Group of operations as single unit
- BEGIN TRANSACTION, COMMIT, ROLLBACK
- Example: Bank transfer (deduct + credit);
39 What is an Index Scan vs Seek
- Scan: reads entire index/table
- Seek: directly finds rows (faster)
- Use covering indexes for best performance;
40 Interview tip you must remember
- Draw ER diagrams for relationships
- Always mention when to use views vs temp tables
- Practice EXPLAIN ANALYZE for query optimization
*Double Tap â¤ď¸ For Part 5*
| 2 | â
Top Platforms to Practice Coding for Beginners đ§âđťđ
1ď¸âŁ LeetCode
â Best for Data Structures & Algorithms
â Ideal for interview prep (easy to hard levels)
2ď¸âŁ HackerRank
â Practice Python, SQL, Java, and 30 Days of Code
â Also covers AI, databases, and regex
3ď¸âŁ Codeforces
â Great for competitive programming
â Regular contests & strong community
4ď¸âŁ Codewars
â Solve "Kata" (challenges) ranked by difficulty
â Clean interface and fun challenges
5ď¸âŁ GeeksforGeeks
â Tons of articles + coding problems
â Covers both theory and practice
6ď¸âŁ Exercism
â Mentor-based feedback
â Clean challenges in over 50 languages
7ď¸âŁ Project Euler
â Math + programming-based problems
â Great for logical thinking
8ď¸âŁ Replit
â Write and run code in-browser
â Build mini-projects without installing anything
9ď¸âŁ Kaggle (for Data Science)
â Practice Python, Pandas, ML, and join competitions
đ GitHub
â Explore open-source code
â Contribute, learn, and build your portfolio
đĄ Tip: Start with easy problems and stay consistent â 1 problem a day beats 10 in one day. | 0 |
| 3 | â
Web Development Projects You Should Build as a Beginner đđť
1ď¸âŁ Landing Page
⤠HTML and CSS basics
⤠Responsive layout
⤠Mobile-first design
⤠Real use case like a product or service
2ď¸âŁ To-Do App
⤠JavaScript events and DOM
⤠CRUD operations
⤠Local storage for data
⤠Clean UI logic
3ď¸âŁ Weather App
⤠REST API usage
⤠Fetch and async handling
⤠Error states
⤠Real API data rendering
4ď¸âŁ Authentication App
⤠Login and signup flow
⤠Password hashing basics
⤠JWT tokens
⤠Protected routes
5ď¸âŁ Blog Application
⤠Frontend with React
⤠Backend with Express or Django
⤠Database integration
⤠Create, edit, delete posts
6ď¸âŁ E-commerce Mini App
⤠Product listing
⤠Cart logic
⤠Checkout flow
⤠State management
7ď¸âŁ Dashboard Project
⤠Charts and tables
⤠API-driven data
⤠Pagination and filters
⤠Admin-style layout
8ď¸âŁ Deployment Project
⤠Deploy frontend on Vercel
⤠Deploy backend on Render
⤠Environment variables
⤠Production-ready build
đĄ One solid project beats ten half-finished ones.
đŹ Tap â¤ď¸ for more! | 0 |
| 4 | https://www.facebook.com/share/r/1RymAjewA8/ | 0 |
| 5 | https://www.facebook.com/share/r/18YxaSMSov/ | 0 |
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