Target Backend Engineer L4 Interview Experience and Questions
Question Details
Recruitment Source: LinkedIn Outreach
Total Duration: Approximately 25 days
Outcome: Selected
Online Assessment *
Problem 1: Basic algorithmic problem requiring loops and condition
Full Details
Recruitment Source: LinkedIn Outreach
Total Duration: Approximately 25 days
Outcome: Selected
Online Assessment *
Problem 1: Basic algorithmic problem requiring loops and conditional logic. *
Problem 2: Range query task [L, R] to identify numbers divisible by $\sqrt{n}$, implemented using a Stack-based approach. *
Problem 3: String manipulation problem (variation of Minimum Distance), implemented using Dynamic Programming.
Technical Interview Round 1 (60 mins) *
DSA: Implemented Zig-Zag traversal of a Binary Tree. *
System Design: Provided a high-level architectural design for an E-commerce platform. *
Coding: Wrote a function to sort specific strings within a List<String> based on a starting character using only Java Streams. *
Theory: Discussed SOLID principles, CAP theorem, and feature upgrades from Java 8 to Java 17.
**Technical Interview Round 2 (
System Design 70 mins)** *
Problem Statement: Design a Personalized Promotion System. *
Solution: The process involved requirement gathering, defining API contracts, selecting the database technology with justification, and outlining the specific database schema.
Hiring Manager Round (45 mins) *
Experience: High-level overview of current organizational projects and specific team contributions. *
Behavioral: Situational questions answered using the STAR method. *
Technical: Comparison of RDBMS vs. NoSQL and discussion regarding exposure to AI. *
Logistics: Discussion of compensation details.
About This Question
This is a reported interview question from a target interview for a swe role (mid level) during the oa round reported in 2025.
It covers the following topics: Sql, Strings, Binary Tree, System Design, Dynamic Programming, Oop, Behavioral, Stack .
Difficulty rating: Easy