[Solved] Identify the error in this Angular RxJS code using forkJoin: import { forkJoin, of } from 'rxjs'; const obs1 = of(1, 2); const obs2 = of('A', 'B'); forkJoin([obs1, obs2]).subscribe(console.log); | Angular

Angular - RxJS Operators

Identify the error in this Angular RxJS code using forkJoin:

import { forkJoin, of } from 'rxjs';

const obs1 = of(1, 2);
const obs2 = of('A', 'B');

forkJoin([obs1, obs2]).subscribe(console.log);

ANo error; code works and logs [2, 'B']

BforkJoin requires observables to emit only once; multiple emissions cause error

CforkJoin does not accept an array of observables

DforkJoin emits on every emission, so output is multiple arrays

Step-by-Step Solution

Solution:

Step 1: Check forkJoin input and behavior
forkJoin accepts an array of observables and waits for all to complete, then emits an array of their last emitted values.
Step 2: Verify observables emitting multiple values
Observables emitting multiple values are allowed; forkJoin only emits after completion with last values. Here, obs1 emits 1 then 2, obs2 emits 'A' then 'B'. forkJoin emits [2, 'B'] once.
Final Answer:
No error; code works and logs [2, 'B'] -> Option A
Quick Check:
forkJoin waits for last values, no error [OK]

Quick Trick: forkJoin accepts arrays and emits last values after completion [OK]

Common Mistakes:

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Identify the error in this Angular RxJS code using forkJoin: