[Solved] Given the code below, what will serviceA.getName() output?class ServiceA { getName() { return 'Service A'; } } injector.register(ServiceA); const serviceA = injector.get(ServiceA); console.... | LLD

LLD - Advanced LLD Concepts

Given the code below, what will serviceA.getName() output?

class ServiceA {
  getName() { return 'Service A'; }
}

injector.register(ServiceA);
const serviceA = injector.get(ServiceA);
console.log(serviceA.getName());

Anull

Bundefined

CError: Service not found

DService A

Step-by-Step Solution

Solution:

Step 1: Understand registration and retrieval
The code registers ServiceA with the injector, then asks the injector to give an instance of ServiceA.
Step 2: Check the method call on the instance
The instance has a method getName() that returns the string 'Service A'. So calling serviceA.getName() returns 'Service A'.
Final Answer:
Service A -> Option D
Quick Check:
Registered service returns its name [OK]

Quick Trick: Registered services return their methods normally [OK]

Common Mistakes:

Assuming injector.get returns undefined or null
Forgetting to register before getting
Expecting an error without registration

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Given the code below, what will serviceA.getName() output?

Step 1: Understand registration and retrieval

Step 2: Check the method call on the instance

Final Answer:

Quick Check:

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