[Solved] What is the main purpose of guards in a NestJS application? — Ans: To control access by allowing or blocking requests based on conditions | NestJS

NestJS - Guards

What is the main purpose of guards in a NestJS application?

ATo format the response data before sending it to the client

BTo control access by allowing or blocking requests based on conditions

CTo manage database connections and queries

DTo handle errors and exceptions globally

Step-by-Step Solution

Solution:

Step 1: Understand the role of guards
Guards are designed to check conditions before a route handler runs, deciding if access should be granted.
Step 2: Compare with other responsibilities
Formatting responses, managing database, and error handling are done by other parts of NestJS, not guards.
Final Answer:
To control access by allowing or blocking requests based on conditions -> Option B
Quick Check:
Guards control access = A [OK]

Quick Trick: Guards decide if a request can proceed or not [OK]

Common Mistakes:

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