[Solved] Identify the error in the following dependency injection registration code:container.register('Database', DatabaseClass); container.register('UserRepo', UserRepositoryClass, ['Db']); | LLD

LLD - Advanced LLD Concepts

Identify the error in the following dependency injection registration code:

container.register('Database', DatabaseClass);
container.register('UserRepo', UserRepositoryClass, ['Db']);

ADependency name 'Db' does not match registered service 'Database'

BUserRepositoryClass should not have dependencies

CDatabaseClass is not registered correctly

DNo error, code is correct

Step-by-Step Solution

Solution:

Step 1: Check dependency names in registration
UserRepo depends on 'Db' but only 'Database' is registered, so names mismatch.
Step 2: Identify cause of error
The container cannot resolve 'Db' because it was never registered under that name.
Final Answer:
Dependency name 'Db' does not match registered service 'Database' -> Option A
Quick Check:
Dependency name mismatch = Error [OK]

Quick Trick: Dependency names must match registered service names exactly [OK]

Common Mistakes:

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