[Solved] Given this Angular code snippet:const obs = new Observable(subscriber => { subscriber.... subscriber.next(3);});obs.subscribe(value => console.log(value));What will be printed in the console? | Angular

Angular - RxJS and Observables Fundamentals

Given this Angular code snippet:

const obs = new Observable(subscriber => {
  subscriber.next(1);
  subscriber.next(2);
  subscriber.complete();
  subscriber.next(3);
});
obs.subscribe(value => console.log(value));

What will be printed in the console?

A1 2 3

B3

C1 2

DNo output

Step-by-Step Solution

Solution:

Step 1: Understand observable emissions
The observable emits 1, then 2, then calls complete(). After completion, emissions stop, so 3 is ignored.
Step 2: Determine console output
The subscriber logs values 1 and 2 only. Value 3 is not emitted because the observable is completed before it.
Final Answer:
1 2 -> Option C
Quick Check:
Complete stops emissions = 1 2 [OK]

Quick Trick: complete() stops further emissions [OK]

Common Mistakes:

MISTAKES

Expecting value after complete()
Thinking all next() calls run regardless
Ignoring complete() effect

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Given this Angular code snippet:

Step 1: Understand observable emissions

Step 2: Determine console output

Final Answer:

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