DevOps / Apache Groovy Interview questions

What is the difference between @Immutable and a manually written immutable class?

@Immutable is an AST transformation that automatically generates an immutable class from a simple property declaration list - final fields, a suitable constructor, equals/hashCode/toString, and defensive copying for mutable-looking property types like collections - all without writing that boilerplate by hand.

A manually written immutable class requires writing all of that yourself: declaring every field final, writing a constructor that assigns them, implementing equals/hashCode/toString consistently, and remembering to defensively copy any mutable-looking fields on the way in and out, each of which is an easy place to introduce a subtle bug if done manually and inconsistently.

The tradeoff is customization: @Immutable's generated behavior follows fixed conventions, so a class needing unusual construction logic, non-standard equality semantics, or special handling not covered by its defaults may still need to be hand-written instead.

Take quiz

@Immutable automatically handles, among other things: defensive copying of mutable-looking property types

✓ Correct! Well done.

only method naming conventions with no other behavior

✗ Try again if not.

database schema generation

✗ Try again if not.

A tradeoff of @Immutable versus a manual implementation is: less flexibility for unusual construction or equality logic

✓ Correct! Well done.

it removes the ability to have any fields at all

✗ Try again if not.

it makes the class mutable instead of immutable

✗ Try again if not.

Invest now in Acorns!!! 🚀 Join Acorns and get your $5 bonus!

Invest now in Acorns!!! 🚀
Join Acorns and get your $5 bonus!

Earn passively and while sleeping

Acorns is a micro-investing app that automatically invests your "spare change" from daily purchases into diversified, expert-built portfolios of ETFs. It is designed for beginners, allowing you to start investing with as little as $5. The service automates saving and investing. Disclosure: I may receive a referral bonus.

Invest now!!! Get Free equity stock (US, UK only)!

Use Robinhood app to invest in stocks. It is safe and secure. Use the Referral link to claim your free stock when you sign up!.

The Robinhood app makes it easy to trade stocks, crypto and more.

Webull! Receive free stock by signing up using the link: Webull signup.

More Related questions...

What is Apache Groovy? What is a closure in Groovy? What are GStrings in Groovy? Define the safe navigation operator in Groovy? What is the Elvis operator in Groovy? What is Groovy Truth? What is the def keyword used for in Groovy? What are GroovyBeans? Describe the spread operator in Groovy? What is AST transformation in Groovy? What is @CompileStatic used for? What is @TypeChecked used for in Groovy? What are Groovy ranges? What is a GDK in Groovy? Describe Grape (@Grab) in Groovy? What is MarkupBuilder in Groovy? What are traits in Groovy? What is the with method used for in Groovy? List the main differences between Groovy and Java syntax? How do you run a Groovy script? What is the difference between == and.equals() in Groovy? How does Groovy support optional typing? Why do we use def instead of explicit types in Groovy? What is the difference between a closure and a Java lambda? How does Groovy's metaClass enable dynamic method addition? When should you use @CompileStatic instead of dynamic Groovy? What is the difference between tap and with in Groovy? How does Groovy implement operator overloading? Why is Groovy considered a superset of Java syntax? What happens when methodMissing is invoked in Groovy? How does Groovy handle multiple assignment? What is the difference between a Groovy script and a Groovy class? When should you use @Builder instead of a manual builder pattern? How does Groovy's switch statement differ from Java's? What is the difference between delegate and owner in a closure? Why do Gradle and Jenkins use Groovy for their DSLs? How does Groovy support named and default parameters? What is the difference between @Immutable and a manually written immutable class? Explain the lifecycle of an AST transformation during Groovy compilation? How can you optimize Groovy code performance using static compilation? How do you troubleshoot a MissingMethodException in Groovy? Explain the internal working of Groovy's Meta Object Protocol? Explain the execution flow of a closure's delegation strategy? How can you optimize closure performance using memoization? Which is better for a DSL: Groovy closures or a builder class, and why? How do you troubleshoot a ConcurrentModificationException in Groovy collections? Explain the lifecycle of a Groovy Category being applied with use()? How can you optimize large Groovy scripts by mixing static and dynamic compilation? Explain the execution flow of currying in a Groovy closure? How do you troubleshoot unexpected Groovy Truth evaluation in conditionals?

Show more question and Answers...

Testing

	Interviews Questions Java Spring Hibernate DevOps Testing API BigData Web Erlang AI Database Integration Cloud Python Scala Tools Golang SAP	About Javapedia.net Javapedia.net is for Java and J2EE developers, technologist and college students who prepare of interview. Also this site includes many practical examples. This site is developed using J2EE technologies by Steve Antony, a senior Developer/lead at one of the logistics based company.
	contact: javatutorials2016[at]gmail[dot]com
Kindly consider donating for maintaining this website. Thanks.
	Copyright © 2026, javapedia.net, all rights reserved. privacy policy.

DevOps / Apache Groovy Interview questions

What is the difference between @Immutable and a manually written immutable class?

Comments & Discussions

Recently added...