What is REST ? | REST vs GraphQL | Benefits & Drawbacks | Working | System Design Playlist (Day 03)

🎥 System Design Playlist | Day 03 — What is REST? | REST vs GraphQL | Benefits & Drawbacks | Working Explained

In this episode, we take a deep dive into one of the most debated topics in backend development — REST vs GraphQL.
Understanding these two API paradigms is essential for mastering System Design and backend interviews.

🚀 Topics Covered

🔹 What is REST — core principles and how RESTful APIs work
🔹 Benefits of REST architecture in modern web systems
🔹 Drawbacks of REST — performance limits, overfetching, underfetching
🔹 What is GraphQL — origin, core idea, and how it solves REST’s issues
🔹 How GraphQL Works with client–server architecture
🔹 Real-world Example of REST vs GraphQL data fetching
🔹 3 Core Functionalities of GraphQL:
  ◽ Queries
  ◽ Mutations
  ◽ Subscriptions
🔹 GraphQL vs REST — comparison by performance, flexibility & complexity
🔹 Benefits of GraphQL for modern applications
🔹 Drawbacks of GraphQL developers must know
🔹 Which one should you pick? — REST or GraphQL in real-world projects

⏱️ Timestamps

00:00 – Overview
05:40 – What is REST?
07:29 – Working Example Of REST
09:21 – HTTP Status Codes
10:36 – Benefits of REST
12:29 – Drawbacks of REST
16:17 – What is GraphQL ?
17:16 – How GraphQL Works ?
22:53 – 3 Core GraphQL Functions (Queries, Mutations, Subscriptions)
26:33 – GraphQL vs REST Comparison
28:36 – Benefits of GraphQL
30:08 – Drawbacks of GraphQL
32:04 – Which One to Choose & Why
35:26 – Summary & Takeaways

📚 Watch the Full Playlist

👉 System Design Playlist:    • System Design Playlist  

📸 Follow on Instagram for daily backend & system-design insights:   / code_muni.ai  


💡 Pro Tip: Watch till the end to master the fundamental differences between REST and GraphQL, a topic that appears in almost every backend or system-design interview!

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