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Optional Chaining & ??
easyComplete guide with examples and interview questions · 20 min
Definition
Say it out loud in an interview — clear, simple, no textbook wording.
?. and nullish coalescing vs || for defaults.
In interviews, lead with a clear one-liner, then add one example. Senior rounds go deeper on edge cases and trade-offs — have a short code snippet ready.
Quick Stats
20
Minutes
easy
Difficulty
4
Interview Q's
Key takeaways
- •Core concepts for Optional Chaining & ?? interviews
- •Know the definition and one concrete example
- •Watch for common traps senior interviewers probe
- •Tie answers back to real debugging experience
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