persistent systems

Software Engineer

Software EngineerSoftware EngineerMedium

This interview process is for a Software Engineer role at Persistent Systems, designed to assess technical skills, problem-solving abilities, and cultural fit.

Rounds

3

Timeline

~7 days

Experience

2 - 5 yrs

Salary Range

US$80000 - US$120000

Total Duration

150 min

Overall Evaluation Criteria

Technical Skills

Problem-solving skills
Coding proficiency
Algorithmic thinking
Data structure knowledge

Behavioral and Cultural Fit

Communication clarity
Teamwork and collaboration
Adaptability
Learning agility

System Design and Architecture

Understanding of software design principles
Scalability considerations
System design approach

Preparation Tips

1Review fundamental data structures and algorithms.
2Practice coding problems on platforms like LeetCode or HackerRank.
3Brush up on object-oriented programming (OOP) concepts.
4Understand common software design patterns.
5Prepare for behavioral questions using the STAR method.
6Research Persistent Systems' products and values.
7Be ready to discuss your past projects in detail.

Study Plan

1

Data Structures and Algorithms

Weeks 1-2: Data Structures & Algorithms fundamentals. Practice implementations and complexity analysis.

Weeks 1-2: Focus on core data structures (Arrays, Linked Lists, Trees, Graphs, Hash Tables) and algorithms (Sorting, Searching, Dynamic Programming, Greedy Algorithms). Practice implementing these and analyzing their time and space complexity.

2

Object-Oriented Programming and Design Patterns

Week 3: OOP principles and Design Patterns.

Week 3: Deep dive into Object-Oriented Programming (OOP) principles (Encapsulation, Inheritance, Polymorphism, Abstraction) and common design patterns (Singleton, Factory, Observer, Strategy).

3

System Design

Week 4: System Design concepts and practice.

Week 4: Focus on System Design. Understand concepts like scalability, load balancing, database design (SQL vs NoSQL), caching, and API design. Practice designing common systems like a URL shortener or a Twitter feed.

4

Behavioral Preparation

Week 5: Behavioral questions preparation using STAR method.

Week 5: Prepare for behavioral questions. Reflect on past experiences and prepare stories using the STAR method (Situation, Task, Action, Result) for common questions related to teamwork, problem-solving, and leadership.

5

Company Research

Week 6: Company research and question preparation.

Week 6: Research Persistent Systems. Understand their mission, values, recent projects, and the specific role you are applying for. Prepare questions to ask the interviewer.

Commonly Asked Questions

Write a function to reverse a linked list.
Explain the difference between a process and a thread.
How would you design a system to handle millions of concurrent users?
Tell me about a time you failed and what you learned from it.
What are your strengths and weaknesses?
Describe your experience with [specific technology relevant to the role].

Location-Based Differences

India

Interview Focus

Adaptability to local work cultureCommunication skills in the local language (if applicable)Understanding of local market trends

Common Questions

Tell me about a challenging project you worked on.

How do you handle tight deadlines?

Describe a time you disagreed with a team member.

Tips

Research common projects and technologies used in this region.
Be prepared to discuss your experience with local business practices.
Practice answering behavioral questions in a way that highlights collaboration.

USA

Interview Focus

Proficiency in English communicationFamiliarity with global software development standardsExperience with cross-cultural team collaboration

Common Questions

What are your thoughts on agile methodologies?

How do you approach code reviews?

Describe your experience with cloud platforms.

Tips

Ensure your resume clearly outlines your experience with international projects.
Be ready to articulate your understanding of global best practices.
Highlight any experience working with distributed teams.

Process Timeline

1
Technical Screening45m
2
System Design and Architecture60m
3
Managerial Round45m

Interview Rounds

3-step process with detailed breakdown for each round

1

Technical Screening

Coding challenge to assess fundamental programming skills.

Data Structures And Algorithms InterviewMedium
45 minTechnical Screener

This initial round focuses on assessing your fundamental programming skills. You will be asked to solve coding problems that test your knowledge of data structures and algorithms. The interviewer will evaluate your approach to problem-solving, your coding style, and your ability to explain your thought process.

What Interviewers Look For

Clear thinking processProficiency in at least one programming languageAbility to translate problem into code

Evaluation Criteria

Correctness of the solution
Efficiency of the solution (time and space complexity)
Code readability and maintainability
Ability to explain the approach

Questions Asked

Given an array of integers, find the contiguous subarray with the largest sum.

ArrayDynamic Programming

Implement a binary search tree and its traversal methods (in-order, pre-order, post-order).

Data StructuresTreesRecursion

Preparation Tips

1Practice coding problems on platforms like LeetCode.
2Understand time and space complexity analysis.
3Be able to explain your code clearly.

Common Reasons for Rejection

Inability to articulate thought process clearly.
Lack of fundamental programming knowledge.
Poor problem-solving approach.
2

System Design and Architecture

Assess system design and architectural capabilities.

System Design InterviewHard
60 minSenior Engineer / Architect

This round evaluates your ability to design and architect software systems. You will be presented with a high-level problem and asked to design a solution, considering factors like scalability, performance, reliability, and cost. This often involves discussing database choices, API design, caching strategies, and load balancing.

What Interviewers Look For

Ability to design scalable and reliable systemsUnderstanding of distributed systems conceptsPragmatic approach to problem-solving

Evaluation Criteria

Scalability of the proposed design
Robustness and fault tolerance
Choice of appropriate technologies
Trade-off analysis and justification

Questions Asked

Design a URL shortening service like Bitly.

System DesignScalabilityDatabases

Design a news feed system for a social media platform.

System DesignDistributed SystemsCaching

Preparation Tips

1Study system design concepts (e.g., from 'Grokking the System Design Interview').
2Understand trade-offs between different architectural choices.
3Practice designing common systems.

Common Reasons for Rejection

Lack of understanding of system design principles.
Inability to handle scale and performance considerations.
Poor trade-off analysis.
3

Managerial Round

Assess behavioral traits and cultural fit.

Behavioral InterviewMedium
45 minHiring Manager

This round focuses on your behavioral aspects and cultural fit. You will be asked questions about your past experiences, how you handle challenges, your strengths and weaknesses, and your career aspirations. The goal is to understand how you work in a team and if you align with Persistent Systems' values.

What Interviewers Look For

Good communication and interpersonal skillsAbility to work in a teamProactiveness and ownershipAlignment with company values

Evaluation Criteria

Communication clarity and effectiveness
Teamwork and collaboration skills
Problem-solving approach in past experiences
Cultural alignment with Persistent Systems

Questions Asked

Tell me about a time you had to deal with a difficult colleague.

BehavioralTeamwork

Describe a project where you took initiative and what was the outcome.

BehavioralLeadershipInitiative

What are your career goals for the next 3-5 years?

BehavioralCareer Goals

Preparation Tips

1Prepare answers using the STAR method.
2Be honest and authentic.
3Research Persistent Systems' values and culture.
4Prepare thoughtful questions to ask the interviewer.

Common Reasons for Rejection

Poor communication skills.
Lack of self-awareness.
Inability to provide specific examples.
Mismatch with company culture.

Commonly Asked DSA Questions

Frequently asked coding questions at persistent systems

View all
Two SumEASYLongest Substring Without Repeating CharactersMEDIUMLongest Palindromic SubstringMEDIUMPalindrome NumberEASYValid ParenthesesEASYGroup AnagramsMEDIUMMaximum SubarrayMEDIUMMerge Sorted ArrayEASYValid AnagramEASYMinimum Bit Flips to Convert NumberEASY