📘 SINGLETON PATTERN — WHAT INTERVIEWS ACTUALLY EXPECT

Singleton is often taught as “one instance only.”

But interviews don’t stop there.

They go deeper —

Is it thread-safe?

Is it lazily initialized?

Can it break via reflection or serialization?

A basic implementation shows syntax.

A complete answer shows awareness of real-world pitfalls.

Most candidates write Singleton.

Strong candidates question it.

I’ve broken this down with implementations, trade-offs, and interview scenarios in my blog.