Functional Interview Questions
3 interview questions in our bank cover Functional, most of them Coding & Leetcode-style Questions. They average 2.3/5 difficulty — easy — and each one was reported by a candidate after a real interview. Companies known to ask about Functional: Antra, Fiserv, Databricks.
Practice these on the problems board →Companies that ask about Functional
Question mix
- Coding & Leetcode-style Questions3
Difficulty
- 2/5 — easy2
- 3/5 — medium1
Questions tagged Functional
Using Stream API in Java
2/5This introductory programming exercise, featured in technical assessments at Antra, asks you to process a collection of text items to isolate those containing a specific substring and present them in alphabetical order. The challenge evaluates basic data filtering and sorting capabilities using modern functional programming paradigms or standard library utilities. Unlock the full problem specifications and the complete reference solution with a subscription.
Coding & Leetcode-style QuestionsAntraList of Strings Using Stream API
2/5Sharpen your modern Java functional programming skills with this concise coding exercise reported during Fiserv technical evaluations. You will learn how to process collections of text efficiently by leveraging functional interfaces, method references, and custom lambda expressions to handle iteration and output tasks. This problem is ideal for testing your grasp of stream operations and code conciseness. Unlock the full problem details and recommended implementation by acquiring a subscription.
Coding & Leetcode-style QuestionsFiservLazy Array with Deferred Map
3/5Reported from Databricks interviews, this design challenge asks you to build a collection wrapper that supports deferred, immutable transformations. You must record mapping operations without executing them immediately, delaying computation until a specific lookup method is invoked while ensuring separate transformation chains remain isolated. The problem evaluates your understanding of lazy evaluation, immutability principles, and clean class design. Access the complete problem description and optimal solution by subscribing.
Coding & Leetcode-style QuestionsDatabricks
Functional interview FAQ
- How many Functional interview questions are there?
- 3 reported questions, mostly Coding & Leetcode-style Questions.
- Which companies ask Functional questions?
- Antra (1), Fiserv (1), Databricks (1).
- How hard are Functional questions?
- They average 2.3 out of 5: 2 at 2/5, 1 at 3/5.