Infosys System Engineer Interview Questions and Answers

Q1. What are the fundamental concepts of coding?
Ans. 
Fundamental coding concepts include syntax, data structures, algorithms, and debugging, essential for effective programming.
• Syntax: The set of rules that defines the combinations of symbols that are considered to be correctly structured programs. Example: In Python, indentation is crucial.

• Data Structures: Ways to organize and store data for efficient access and modification. Example: Arrays, linked lists, and hash tabl...read more
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Q2. What are the details of Object-Oriented Programming (OOP) concepts?
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OOP is a programming paradigm based on objects, encapsulating data and behavior for modular and reusable code.
• Encapsulation: Bundling data and methods that operate on the data within one unit (e.g., a class).

• Inheritance: Mechanism to create a new class using properties and methods of an existing class (e.g., a 'Dog' class inheriting from an 'Animal' class).

• Polymorphism: Ability to present the same interface for differe...read more
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Duration was 1.5 hrs. Questions were asked on topics like aptitude, reasoning , puzzle solving and verbal ability. Also a topic was given on which candidates were expected to write an essay. Overall the difficulty level was easy to medium.

Q1. Introduce Yourself
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Q2. Explain about your projects (mentioned in resume)
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Q3. Have you got any certifications on cloud technologies?
Ans. 
Yes, I have certifications in AWS and Azure cloud technologies.
• Certified AWS Solutions Architect

• Microsoft Certified: Azure Administrator Associate

• Completed training courses on Google Cloud Platform
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Q4. What do you do in your free time?
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Q5. Explain about Encapsulation (OOPS concept)
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Encapsulation is the concept of bundling data and methods that operate on the data into a single unit, known as a class.
• Encapsulation helps in hiding the internal state of an object and restricting access to it.

• It allows for data hiding, which prevents outside code from directly accessing an object's internal state.

• Access to the data is typically controlled through public methods (getters and setters) defined in the cl...read more
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Q6. Tell about your previous intern/work experience if any
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Q7. What is the one thing that you can say about you for which haven't been noticed by others and credited?
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Q8. Questions about schooling, CGPA in college
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Q1. What are sorting algorithms, and can you explain their various types and uses?
Ans. 
Sorting algorithms arrange data in a specific order, crucial for efficient data processing and retrieval.
• Types of sorting algorithms include: Bubble Sort, Quick Sort, Merge Sort, and Heap Sort.

• Bubble Sort is simple but inefficient for large datasets; it repeatedly steps through the list.

• Quick Sort is efficient for large datasets, using a divide-and-conquer approach to sort elements.

• Merge Sort divides the array into hal...read more
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Q2. What is the Software Development Lifecycle (SDLC)?
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The Software Development Lifecycle (SDLC) is a structured process for developing software applications through various stages.
• 1. Requirements Gathering: Identify user needs and system requirements.

• 2. Design: Create architecture and design specifications for the software.

• 3. Implementation: Write and compile the code based on design documents.

• 4. Testing: Validate the software through various testing methods (e.g., unit t...read more
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Questions regarding aptitude, pseudocode, and communication skills.

Q1. Tell me about yourself.
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Q2. What was your involvement in your college project?
Ans. 
I was the team leader for our college project on developing a smart home automation system.
• Led a team of 5 members in designing and implementing the system

• Responsible for project planning, delegating tasks, and ensuring deadlines were met

• Implemented features such as voice-controlled lights, temperature control, and security cameras

• Presented the project at a college exhibition and received positive feedback

• Collaborated ...read more
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It is very easy, questions on all topics are covered.

Q1. What is abstraction and encapsulation?
Ans. 
Abstraction is hiding unnecessary details while encapsulation is bundling data and methods together.
• Abstraction focuses on showing only essential features of an object while hiding unnecessary details.

• Encapsulation involves bundling the data (attributes) and methods (functions) that operate on the data into a single unit.

• Abstraction allows for easier understanding and management of complex systems.

• Encapsulation helps i...read more
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Q2. Write a sql query to update a record
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SQL query to update a record in a database table
• Use the UPDATE statement followed by the table name

• Set the column(s) to be updated using SET keyword

• Specify the new values for the column(s) to be updated

• Use WHERE clause to specify the condition for which record to update
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Q1. Will you able to relocate?
Ans. 
Yes, I am willing to relocate for the right opportunity.
• I am open to relocating for the right job opportunity

• I have relocated for previous positions and am comfortable with the process

• I understand the importance of being flexible and adaptable in the field of engineering
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Q2. Why Infosys?
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Infosys is a global leader in technology services and consulting, known for its innovative solutions and commitment to excellence.
• Infosys has a strong reputation for delivering high-quality technology solutions to clients worldwide.

• The company offers a wide range of opportunities for professional growth and development.

• Infosys has a culture of innovation and collaboration, which aligns with my own values and career goa...read more
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General Aptitude , Grammar MCQ and Essay Writing

Q1. Tell me about yourself?
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Q2. Which Language are you Familiar ?
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Q3. Basic Questions from oops and dbms
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Q4. Why did you choose Infosys ?
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Q5. Questions from my project
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Q1. What questions were asked regarding the projects you have completed?
Ans. 
Questions about projects completed in previous roles.
• Asked to describe specific projects worked on

• Inquired about the technologies used in the projects

• Asked about the challenges faced and how they were overcome

• Asked about the impact of the projects on the organization

• Inquired about the team collaboration and communication during the projects
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Q2. What technologies were used in your project?
Ans. 
The project utilized a variety of technologies including cloud computing, virtualization, automation tools, and network protocols.
• Cloud computing (e.g. AWS, Azure)

• Virtualization (e.g. VMware, Hyper-V)

• Automation tools (e.g. Ansible, Puppet)

• Network protocols (e.g. TCP/IP, DNS)
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Q1. What are the principles of software engineering?
Ans. 
Principles of software engineering are guidelines that help in the development of high-quality software.
• Requirements gathering and analysis

• Design

• Implementation

• Testing

• Maintenance

• Documentation

• Quality assurance

• Version control

• Continuous integration

• Agile development
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Q2. Subqueries, views, joins in SQL
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