Which of the following is the correct syntax to subscribe to an Observable named data$ inside ngOnInit?

easy📝 Syntax Q3 of 15

Angular - RxJS and Observables Fundamentals

Which of the following is the correct syntax to subscribe to an Observable named data$ inside ngOnInit?

Athis.data$.subscribe(value => { this.data = value; });

Bthis.data$.subscribe = value => { this.data = value; };

Csubscribe(this.data$, value => this.data = value);

Dthis.data$.subscribe(value) { this.data = value; };

Step-by-Step Solution

Solution:

Step 1: Recall Observable subscription syntax
Use observable.subscribe(callback) to listen to emitted values.
Step 2: Check each option for correct syntax
this.data$.subscribe(value => { this.data = value; }); correctly calls subscribe method with an arrow function callback.
Final Answer:
this.data$.subscribe(value => { this.data = value; }); -> Option A
Quick Check:
Subscription syntax = A [OK]

Quick Trick: Use observable.subscribe(callback) with arrow function [OK]

Common Mistakes:

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