New Grad / Junior Full-stack at Plaid

Full-stackNew Grad / JuniorRejected◆ Commonly asked· 2023

Junior fullstack interview. Coding-heavy early, design and behavioral later.

The loop · 5 rounds

Round 01 · 1 question

Online Assessment

Timed online coding / aptitude screen, usually the first filter.

Move zeroes to the end in place.
New Grad / JuniorEasy◆ Commonly asked
#two-pointers
PracticeLeetCode GeeksforGeeks

Round 02 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

Lowest common ancestor of a binary tree.
New Grad / JuniorMedium◆ Commonly asked
#tree
PracticeLeetCode GeeksforGeeks
Binary tree level order traversal.
New Grad / JuniorMedium◆ Commonly asked
#tree#bfs
PracticeLeetCode GeeksforGeeks
Construct binary tree from preorder and inorder traversal.
New Grad / JuniorMedium◆ Commonly asked
#tree#recursion
PracticeLeetCode GeeksforGeeks

Round 03 · 2 questions

Machine Coding

Build a working component or service under time pressure.

Build a star-rating component (controlled + accessible).
New Grad / JuniorEasy◆ Commonly asked
#react#a11y
PracticeGeeksforGeeks Search
Design and build a URL-shortener service (API + storage).
New Grad / JuniorMedium◆ Commonly asked
#api#hashing
PracticeGeeksforGeeks Search

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

Explain how a hash index differs from a B-tree index.
New Grad / JuniorHard◆ Commonly asked
#databases#indexing
PracticeGeeksforGeeks Search
localStorage vs sessionStorage vs cookies — when to use each?
New Grad / JuniorEasy◆ Commonly asked
#browser
PracticeGeeksforGeeks Search
How would you design and version a public REST API?
New Grad / JuniorMedium◆ Commonly asked
#api-design
PracticeGeeksforGeeks Search

Round 05 · 2 questions

Behavioral / HR

Values, collaboration, and past-experience (STAR) questions.

When did you change your mind after seeing new evidence?
New Grad / Junior◆ Commonly asked
#judgment#star
Describe a time you disagreed with a teammate. How did it resolve?
New Grad / Junior◆ Commonly asked
#conflict#star

◆ This experience is composed from commonly reported questions for this role and level. Real, individually-shared interviews will be layered in over time.