[Solved] Given this Angular code snippet, what will be logged to the console? const store$ = new BehaviorSubject(0); store$.subscribe(value => console.log('Subscriber 1:', value)); store$.next(5); store$.... | Angular

Angular - State Management

Given this Angular code snippet, what will be logged to the console?

const store$ = new BehaviorSubject(0);
store$.subscribe(value => console.log('Subscriber 1:', value));
store$.next(5);
store$.subscribe(value => console.log('Subscriber 2:', value));
store$.next(10);

ASubscriber 1: 0 Subscriber 2: 0 Subscriber 1: 5 Subscriber 2: 5 Subscriber 1: 10 Subscriber 2: 10

BSubscriber 1: 0 Subscriber 1: 5 Subscriber 2: 0 Subscriber 1: 10 Subscriber 2: 10

CSubscriber 1: 0 Subscriber 1: 5 Subscriber 2: 5 Subscriber 1: 10 Subscriber 2: 10

DSubscriber 1: 5 Subscriber 2: 5 Subscriber 1: 10 Subscriber 2: 10

Step-by-Step Solution

Solution:

Step 1: Trace first subscription
Subscriber 1 subscribes first and immediately receives initial value 0, then receives 5 after next(5).
Step 2: Trace second subscription
Subscriber 2 subscribes after next(5), so it immediately receives current value 5.
Step 3: Trace next(10) call
Both subscribers receive 10 after next(10).
Final Answer:
Subscriber 1: 0 Subscriber 1: 5 Subscriber 2: 5 Subscriber 1: 10 Subscriber 2: 10 -> Option C
Quick Check:
BehaviorSubject sends current value on subscribe [OK]

Quick Trick: New subscribers get latest value immediately [OK]

Common Mistakes:

Assuming second subscriber gets initial 0 instead of 5
Missing initial value emission on subscribe
Confusing order of console logs

Master "State Management" in Angular

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Perf

More Angular Quizzes

Given this Angular code snippet, what will be logged to the console?

Step 1: Trace first subscription

Step 2: Trace second subscription

Step 3: Trace next(10) call

Final Answer:

Quick Check:

Want More Practice?