Qualys Interview Experience – Software Engineer (2027 Batch)

Company: Qualys
Role: Software Engineer
Placement Mode: On-Campus
Batch: 2027
Final Result: Selected ✅

1. Overview

The Qualys recruitment process consisted of three rounds: an Online Assessment followed by two Technical Interview rounds.

The overall process focused on Data Structures and Algorithms (DSA), Computer Science fundamentals, problem-solving skills, and in-depth project knowledge.

Throughout the interviews, the interviewers focused more on the candidate's thought process, problem-solving approach, and ability to explain solutions rather than just arriving at the final answer.

The final selection results were announced on the same day as the last interview.

2. Round 1 – Online Assessment

• Platform: HackerRank

• Duration: 90 minutes

Assessment Structure:

• A few MCQs based on Computer Science fundamentals.

• 3 coding questions based on DSA (Easy to Medium difficulty).

Approximately 42 students were shortlisted for the interview rounds.

3. Round 2 – Technical Interview 1

• Duration: Approximately 1 hour

• Primary Focus: CS Fundamentals and DSA

Topics Covered:

1. Introduction

   • Self-introduction and academic background.

2. Object-Oriented Programming (OOP)

   • Core OOP concepts and their practical applications.

3. Data Structures and Algorithms (DSA)

   • 3 coding questions (Easy to Medium difficulty).

   • Questions were similar to LeetCode-style problems.

   • The interviewer focused more on the problem-solving approach, logic, and explanation than just the final code.

4. SQL

   • Asked to write an SQL query to find the second-highest employee salary.

   • Be prepared to solve this question using different approaches:

     • code

       1LIMIT

       and
       code

       1OFFSET

     • Subquery using

       code

       1MAX()

     • Window functions such as

       code

       1DENSE_RANK()

5. Database Management Systems (DBMS)

   • Questions based on fundamental DBMS concepts.

4. Round 3 – Technical Interview 2

• Duration: Approximately 1.5 hours

• Primary Focus: Projects, Technical Depth, and Low-Level Design

Topics Covered:

1. Project Discussion

   • Detailed discussion about the projects mentioned in the resume.

   • Questions about implementation details, architecture, and technologies used.

2. OAuth

   • Deep discussion about OAuth authentication.

   • Understanding the authentication workflow and its implementation.

3. Low-Level Design (LLD)

   • Design an Elevator System.

   • Focus on understanding the requirements, identifying components, and designing the system logically.

The interviewers primarily evaluated how candidates approached unfamiliar problems, structured their solutions, and explained their reasoning.

5. Final Result

The final selection results were announced on the same day as the second technical interview.

Successfully selected for the Software Engineer role at Qualys!