You want to create a singleton Logger service that is shared across all other services. How should you configure the dependency injection container?

hard📝 Conceptual Q8 of 15

LLD - Advanced LLD Concepts

ARegister Logger as a singleton so all injections get the same instance

BRegister Logger as transient to create new instance each time

CDo not register Logger, create manually in each service

DRegister Logger with a factory that returns a new instance every call

Step-by-Step Solution

Solution:

Step 1: Understand singleton service concept
A singleton service means one shared instance used everywhere.
Step 2: Choose correct registration type
Registering Logger as singleton ensures all services get the same instance.
Final Answer:
Register Logger as a singleton so all injections get the same instance -> Option A
Quick Check:
Singleton registration = Shared instance [OK]

Quick Trick: Singleton services share one instance across app [OK]

Common Mistakes:

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