[Solved] What will happen when this FileValidationPipe processes a file larger than 1MB?transform(file) { if (file.size > 1024 * 1024) { throw new BadRequestException('File too large'); } return file; } | NestJS

NestJS - Pipes

What will happen when this FileValidationPipe processes a file larger than 1MB?

transform(file) {
  if (file.size > 1024 * 1024) {
    throw new BadRequestException('File too large');
  }
  return file;
}

AThe pipe throws a BadRequestException with message 'File too large'.

BThe pipe silently ignores the size and returns the file.

CThe pipe logs a warning but returns the file.

DThe pipe returns null without throwing an error.

Step-by-Step Solution

Solution:

Step 1: Understand the size check
The pipe checks if file.size exceeds 1MB (1024 * 1024 bytes).
Step 2: Behavior on size violation
If the file is too large, it throws a BadRequestException with the message 'File too large'.
Step 3: Return value if valid
If the file size is within limits, it returns the file object.
Final Answer:
The pipe throws a BadRequestException with message 'File too large'. -> Option A
Quick Check:
Throw exception on invalid file size [OK]

Quick Trick: Throw exception when file size exceeds limit [OK]

Common Mistakes:

Master "Pipes" in NestJS

9 interactive learning modes - each teaches the same concept differently

More NestJS Quizzes

What will happen when this FileValidationPipe processes a file larger than 1MB?