Infosys Systems Engineer Interview Guide

The first round of the Infosys Systems Engineer interview is the InfyTQ test. This is an online test containing 2-3 rounds - a Qualifying Round, a Final Round, and an Advantage Round (optional).

Qualifying Round - 

In this round, the following topics will be tested - 

• Aptitude 
• Database Management 
• SQL basics
• Programming skills
• OOPs

You will be required to complete 40 multiple-choice based questions in 60 minutes. The breakdown of the questions is as follows - 

• Java/Python - 20 questions
• Database Management - 10 questions
• Aptitude - 10 questions

Answering a question correctly will award you 1 mark and there will be a negative marking of 0.25 for incorrect answers. 

Final Round - 

Once you clear the Qualifying Round, you will take the Infosys Certification exam, in which the above topics will be tested with objective-type and hands-on questions. This is a 3-hour interview.

The pattern for this round is as follows - 

• Java/Python (hands-on) - 2 questions
• Java/Python (multiple choice) - 10 questions
• Database Management (multiple choice) - 10 questions

There will be no negative marking this round.

You must score 65% above in the round to clear it. You will become an Infosys Certified Software Programmer and will be eligible to sit for the technical and behavioral rounds that follow for the Systems Engineer role.

Advantage Round - 

This is an optional round in this process, which will also test the above topics, however, the bar to clear this round will be higher. This is also a 3 hour round where you will be asked programming questions of varying difficulty. Each question will have a different weightage depending on the difficulty. Upon clearing this round, you will win a job opportunity for the role of a Power Programmer and Systems Engineer Specialist. There will be interviews for these roles that will test both technical and behavioral skills.

Note - Your choice of language (between Java and Python) will be asked during the application process. Please be careful while filling it in as you will not have the chance to change it in the future.

For the preparation of the InfyTQ test, the online portal is sufficient. The link for the online portal is attached below. You will have to register on this website, following which you will be able to access the resources - https://infytq.onwingspan.com

Some previously asked Infosys Coding Interview Questions - 

• Given the number, add it to its reverse and check if the number is a palindrome. Continue this process for N iterations.
• From an alphanumeric string, extract all digits, remove the duplicates and form the largest even number possible.
• Given a list of numbers [7, 5, 4, 2, 8, 6, 1, 1, 1, 4, 3], find the number of possible combinations of numbers such that their sum is equal to 6.

Note - A popular question for this round - Given the order table, write queries to get the required output. One question you can try is  - 

https://www.khanacademy.org/computing/computer-programming/sql/relational-queries-in-sql/pc/challenge-customers-orders. 

The second round of the Infosys Systems Engineer interview process is the technical phone screen. The topics that will be tested in this round are - 

• Software Engineering - SDLC
• Operating Systems
• Database Management, SQL
• OOPs
• Data Structure basics
• Basic coding skills in Java/C++

You may also be given pseudo-code and are expected to find the output. Additionally, they may also ask technical questions related to your resume and project experience.

Infosys Technical Questions - 

1. What are classes and objects? 
2. What are the different types of constructors in C++?
3. What is the software development life cycle?
4. Describe the waterfall model. 
5. What is the difference between delete and truncate in SQL?
6. What are foreign keys and candidate keys in DBMS?
7. What are the SDLC steps?
8. What is the complexity of the merge sort algorithm?
9. What is the difference between DDL and DML?
10. What are the ACID properties in DBMS?
11. What are the different types of keys in DBMS? Explain with an example. 
12. To convert a given ER diagram into tables, what is the minimum number of tables required?
13. What is the advantage of using a constructor?
14. What is a Java Virtual Machine? (if you have chosen Java as your preferred language)
15. What is the difference between exceptions and errors?
16. What is hashing?
17. Why is insertion sort called “insertion”?
18. What is the difference between lists, tuples, and dictionaries in Python (if you have chosen Python as your preferred language)?

Infosys Coding Interview Questions - 

1. Write a program to find out whether the input string is a palindrome or not.
2. Write a function to check whether the input number is prime or not.
3. Walk me through the implementation of the merge sort technique. 
4. Write a code to convert an input decimal number into binary without using any built-in functions.

This is the final round of the Infosys Systems Engineer interview process. It may or may not be conducted and depends entirely on the recruiter. In this round, you will be asked general behavioral and scenario-based questions. You will also be asked to discuss relevant experiences from your resume.

Sample Behavioural Questions - 

1. Tell me about yourself.
2. What do you aspire to be?
3. What are your hobbies?
4. Are you comfortable working from anywhere, and for any work hours?
5. What is the most challenging project you have worked on?
6. Tell me about a time when you managed a difficult project?