37 questions · from 1 interviews

Lenovo interview questions

Every question candidates reported from their Lenovo interviews, most frequently asked first. Each links to the write-up it came from, so you can see the round and how it went.

Lenovo coding and DSA questions

  1. 01

    SQL: Fetch Records with Offset and Limit

    Given a User table with 50 records, write a SQL query to fetch 20 records starting from the 5th row, including only the first and last name.

    Easy · From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  2. 02

    SQL: INNER JOIN Query

    Write an INNER JOIN query between two tables.

    Easy · From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  3. 03

    Calculate Total Revenue using Streams

    Calculate total revenue from all orders using Streams.

    Easy · From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  4. 04

    Find Top 3 Highest-Priced Products using Streams

    Find the Top 3 highest-priced products across all orders.

    Medium · From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  5. 05

    Group Products by Category and Calculate Total Revenue

    Group products by category and calculate total revenue per category using Streams.

    Medium · From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  6. 06

    Find Customers with More Than 3 Orders

    Find customers who placed more than 3 orders using Streams.

    Medium · From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  7. 07

    Identify Most Frequently Sold Product

    Identify the most frequently sold product using Streams.

    Medium · From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  8. 08

    Anagram Check

    Determine if two strings are anagrams of each other.

    Easy · From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  9. 09

    Product of Array Except Self

    Given an integer array nums, return an array answer such that answer[i] is equal to the product of all the elements of nums except nums[i]. The product of any prefix or suffix of nums is guaranteed to fit in a 32-bit integer. You must write an algorithm that…

    Medium · From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

Lenovo system design questions

  1. 01

    Microservices Concept

    Explain the concept of Microservices in your project.

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  2. 02

    Authentication Layer in Architecture

    Explain the Authentication Layer in your architecture.

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  3. 03

    Distributed Transactions: 2PC vs Saga

    Distributed transactions – Compare 2PC vs Saga (real production trade-offs).

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  4. 04

    Debugging Duplicate Payment Transactions

    Debugging duplicate payment transactions issue end-to-end.

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  5. 05

    Design a Rate Limiter

    Design a rate limiter handling millions of requests per second.

    Hard · From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  6. 06

    Architect a Real-time Fraud Detection System

    Architect a real-time fraud detection system.

    Hard · From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  7. 07

    Saga & Circuit Breaker Design Pattern

    Saga & Circuit Breaker Design Pattern

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

Lenovo other questions

  1. 01

    Java 8 New Features

    What are the new features introduced in Java 8?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  2. 02

    What is a Method Reference?

    What is a Method Reference?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  3. 03

    Default Methods in Interfaces

    What are Default Methods in interfaces?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  4. 04

    Intermediate Operations in Streams

    Explain Intermediate Operations in Streams.

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  5. 05

    HTTP Status Code 204

    What is HTTP Status Code 204?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  6. 06

    HashMap vs Hashtable

    Difference between HashMap and Hashtable.

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  7. 07

    Garbage Collection

    What is Garbage Collection and how does it work?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  8. 08

    How JWT Works

    How does JWT (JSON Web Token) work?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  9. 09

    Integrating 3rd-Party APIs

    How do you integrate 3rd-party APIs in your project?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  10. 10

    Spring Boot Application Startup Process

    What happens internally when a Spring Boot application starts? (Lifecycle & Bean Initialization Flow)

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  11. 11

    What is @Lazy?

    What is @Lazy?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  12. 12

    What is @Component?

    What is @Component?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  13. 13

    What is Component Scanning?

    What is Component Scanning?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  14. 14

    Global Exception Handling in Spring Boot

    How do you handle exceptions globally?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  15. 15

    What is JPA?

    What is JPA?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  16. 16

    Explain Bean Scopes

    Explain Bean Scopes.

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  17. 17

    @RequestParam vs @RequestBody

    @RequestParam vs @RequestBody

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  18. 18

    What is @PathVariable?

    What is @PathVariable?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  19. 19

    Git Usage in Team

    How do you use Git in your team?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  20. 20

    Git Branching & Merging Strategy

    Branching & merging strategy?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

  21. 21

    JUnit and Mockito Usage

    What is the use of JUnit and Mockito in your project?

    From Lenovo Java Backend Developer Interview Experience (3 YOE) – Complete Question Breakdown

Lenovo interview questions FAQ

What questions are asked in Lenovo interviews?

Candidates reported 37 distinct questions across 1 Lenovo interviews. 9 coding and DSA questions, 7 system design questions, 21 other questions.

How difficult are Lenovo interview questions?

Of the questions candidates rated, 36% were easy, 45% medium and 18% hard.