[Solved] Given this NestJS controller method:@Get('status/:flag')checkStatus(@Param('flag', ParseBoolPipe) flag: boolean) { return flag; }What will be the response when the client requests /status/true? | NestJS

NestJS - Pipes

Given this NestJS controller method:

@Get('status/:flag')
checkStatus(@Param('flag', ParseBoolPipe) flag: boolean) { return flag; }

What will be the response when the client requests /status/true?

AReturns boolean true

BReturns string 'true'

CThrows a 400 Bad Request error

DReturns boolean false

Step-by-Step Solution

Solution:

Step 1: Understand ParseBoolPipe
It converts 'true' or 'false' strings (case insensitive) to boolean values.
Step 2: Input is 'true'
So the pipe converts it to boolean true.
Final Answer:
Returns boolean true -> Option A
Quick Check:
ParseBoolPipe converts 'true' string to boolean true [OK]

Quick Trick: ParseBoolPipe converts 'true'/'false' strings to booleans [OK]

Common Mistakes:

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