[Solved] What is wrong with this code?const subject = new BehaviorSubject();subject.subscribe(value => console.log(value)); | Angular

Angular - RxJS and Observables Fundamentals

What is wrong with this code?

const subject = new BehaviorSubject();
subject.subscribe(value => console.log(value));

ABehaviorSubject requires an initial value in constructor.

Bsubscribe() must be called after next().

CBehaviorSubject cannot be subscribed to directly.

Dnext() must be called before creating BehaviorSubject.

Step-by-Step Solution

Solution:

Step 1: Check BehaviorSubject constructor requirements
BehaviorSubject requires an initial value passed to its constructor.
Step 2: Validate subscription timing
Subscription can happen anytime; no need to call next() first.
Final Answer:
BehaviorSubject requires an initial value in constructor. -> Option A
Quick Check:
BehaviorSubject initial value mandatory = B [OK]

Quick Trick: BehaviorSubject must be created with an initial value. [OK]

Common Mistakes:

MISTAKES

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What is wrong with this code?