#20 most askedVery commonMediumCore Java & OOP
How to write an immutable class
New to Core Java & OOP? Learn it from scratch firstInheritance vs Composition →
🏢 Asked in real interviews
No reports yet. Were you asked this? Be the first to say where.Unlock “How to write an immutable class”
Plus 1,080 more interview questions with step-through solutions and 36 advanced lessons in algorithms, systems and system design.
$39/yearabout 11¢ a day · one payment, no monthly billsLeetCode Premium alone is $159/year.
🛡️ 14-day money-back guarantee. Already a member? Log in