20 questions · from 2 interviews
Dell Technologies interview questions
Every question candidates reported from their Dell Technologies interviews, most frequently asked first. Each links to the write-up it came from, so you can see the round and how it went.
Dell Technologies coding and DSA questions
- 01
PostgreSQL Overview
What is PostgreSQL? What are some of its important features?
- 02
SQL Query for Departments without Employees
Given Employee and Department tables, write an SQL query to find all departments that do not have any employees.
- 03
PostgreSQL vs MySQL
What are the differences between PostgreSQL and MySQL? In what scenarios would you prefer PostgreSQL over MySQL?
- 04
Find Pythagorean Triplets
Given an array of integers, write a Java program to find all Pythagorean triplets—for example, (3, 4, 5).
- 05
First Non-Repeated Character
Given a string, write a Java program to find the first non-repeated character.
- 06
Low‑level design of a hash map (test‑driven)
Design a hash map from scratch using a test‑driven approach. Write unit tests that define the expected behavior (e.g., put, get, remove, handling collisions, resizing) before implementing the actual code. Focus on low‑level design decisions such as bucket…
From Dell Technologies : Software Engineer Internship (Fall 2025) USA : Interview Experience
Dell Technologies system design questions
- 01
Microservices Experience
How have you worked with microservices in your current or previous project?
- 02
Point-to-Point API Call
What is a point-to-point (P2P) API call? How does one microservice communicate directly with another?
- 03
Synchronous Communication in Event-Driven Architecture
If your microservices architecture is event-driven, why do you still need synchronous API communication?
- 04
Project Architecture Explanation
Can you explain the architecture of your current/previous project, including the major components and how they interact?
- 05
Microservices Communication Methods
What are the different ways microservices can communicate with each other? When would you choose synchronous communication versus asynchronous/event-driven communication?
- 06
Saga Pattern
What is the Saga Pattern? How does it help manage distributed transactions across multiple microservices?
- 07
Kafka Duplicate Message Handling
How can duplicate messages/events occur in Kafka? How do you handle duplicate message processing in a consumer?
- 08
Idempotent Kafka Consumer
How would you make a Kafka consumer idempotent so that processing the same event multiple times does not cause duplicate business operations?
- 09
Design Patterns Used
You mentioned design patterns on your résumé. Which design patterns have you used in your projects? Explain where and why you used them with real examples.
Dell Technologies behavioural and HR questions
- 01
Incident Management Experience
What is incident management? Can you describe a production incident you handled, including how you identified the issue, performed root-cause analysis, resolved it, and prevented it from happening again?
Dell Technologies other questions
- 01
Java Memory Areas
What are the different types of memory areas in Java/JVM, and what is each used for?
- 02
JVM and Platform Independence
What is the JVM? How does Java achieve platform independence and allow the same application to run on different operating systems?
- 03
Benefits of Java for Backend Development
What are the key benefits and advantages of using Java for backend application development?
- 04
String Immutability in Java
Why is String immutable in Java? How is immutability achieved, and what are its benefits?
Dell Technologies interview questions FAQ
What questions are asked in Dell Technologies interviews?
Candidates reported 20 distinct questions across 2 Dell Technologies interviews. 6 coding and DSA questions, 9 system design questions, 1 behavioural and HR questions, 4 other questions.