lca Interview Questions
4 interview questions in our bank cover lca, most of them Coding & Leetcode-style Questions. They average 3.3/5 difficulty — medium — and each one was reported by a candidate after a real interview. Companies known to ask about lca: Databricks, Meta, Ripple, BlackRock.
Practice these on the problems board →Companies that ask about lca
Question mix
- Coding & Leetcode-style Questions4
Difficulty
- 3/5 — medium3
- 4/5 — hard1
Questions tagged lca
Path Between Nodes in a Fibonacci Tree
4/5Reported as a challenging Databricks interview question, this task involves navigating massive recursively defined binary trees without actually instantiating the nodes in memory. You must rely on mathematical properties and preorder traversal formulas to locate the lowest common ancestor and trace the exact route between two given nodes. This problem tests advanced recursive comprehension, mathematical deduction, and tree traversal optimization. Unlock the complete problem statement, algorithmic breakdown, and production-ready solution by subscribing.
Coding & Leetcode-style QuestionsDatabricksLowest Common Ancestor (BST / Binary Tree / N-ary)
3/5Popular in Meta technical interviews, this problem explores finding the lowest common ancestor across various hierarchical tree structures including binary search trees, standard binary trees, and N-ary variants. It tests recursive traversal strategies, edge cases involving missing nodes, and optimization techniques utilizing parent pointers. Access the complete set of variations and optimal solutions with a subscription.
Coding & Leetcode-style QuestionsMetaFind Path Between Two Nodes in a Binary Tree
3/5This Ripple interview question requires you to traverse a binary tree structure to locate and reconstruct the sequential route connecting two distinct nodes. The problem assesses your recursion techniques, tree navigation abilities, and skill in tracking ancestry paths efficiently. Unlock the full problem specifications and a clean, tested model solution by securing your subscription.
Coding & Leetcode-style QuestionsRippleCount Levels
3/5In this BlackRock interview task, you are given a hierarchical list of employee and manager relationships to compute the distance or number of intervening levels between two individuals within an organization. The exercise evaluates your ability to model tree structures, construct adjacency graphs, and find paths or lowest common ancestors efficiently. Navigating hierarchical relationships is a practical skill frequently applied in enterprise software design. Gain full access to the problem breakdown and model solution by subscribing.
Coding & Leetcode-style QuestionsBlackRock
Studied alongside
lca interview FAQ
- How many lca interview questions are there?
- 4 reported questions, mostly Coding & Leetcode-style Questions.
- Which companies ask lca questions?
- Databricks (1), Meta (1), Ripple (1), BlackRock (1).
- How hard are lca questions?
- They average 3.3 out of 5: 3 at 3/5, 1 at 4/5.