Infosys System Engineer Interview Questions, Process, and Tips

General mcq to test problem solving

Q1. What is new in java 8
Ans. 
Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and the new Date and Time API.
• Lambda expressions allow you to write more concise code by enabling functional programming in Java.

• Functional interfaces are interfaces with a single abstract method, which can be implemented using lambda expressions.

• Streams provide a new way to work with collections in a more functional st...read more
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Q2. How will u execute multithreading
Ans. 
Multithreading can be executed in a system by creating multiple threads to perform tasks concurrently.
• Create a new thread using the Thread class or Runnable interface

• Implement synchronization to prevent race conditions

• Use thread pools for efficient management of threads

• Utilize locks and semaphores for controlling access to shared resources
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There are easy and different sections available.

Q1. What are the different types of SQL joins?
Ans. 
Different types of SQL joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.
• INNER JOIN: Returns rows when there is at least one match in both tables.

• LEFT JOIN: Returns all rows from the left table and the matched rows from the right table.

• RIGHT JOIN: Returns all rows from the right table and the matched rows from the left table.

• FULL JOIN: Returns rows when there is a match in one of the tables.
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Q2. What can you tell me about the projects you have worked on?
Ans. 
I have worked on various projects involving network infrastructure design, implementation, and optimization.
• Designed and implemented network infrastructure for a large corporate office

• Optimized network performance by implementing QoS policies

• Worked on integrating new technologies such as SD-WAN into existing network architecture
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Good it was , numerical , logical , reasoning

Good it was , 20 mins . tipics were arrays

Q1. Good it was , topics were sql
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Q2. Good it was , related to python
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Very basic questions . verbal ability was a bit tough.

Q1. Tell us about sql joins?
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Q2. What are neural networks?
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Time, Least Common Multiple (LCM), Highest Common Factor (HCF), and boat streams.

Q1. Tell me about yourself
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Q2. Write the Fibonacci series code
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Q3. Which you have made and explain about that
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Q4. Have you faced any challenges during your project and how did you overcome that problem
Ans. 
Yes, I faced a challenge when integrating a new system with existing infrastructure. I overcame it by conducting thorough research and collaborating with team members.
• Identified the compatibility issues between the new system and existing infrastructure

• Conducted research to find possible solutions and best practices

• Collaborated with team members to implement the chosen solution effectively
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Normal aptitude test

Q1. What is an array
Ans. 
An array is a data structure that stores a collection of elements of the same type in a contiguous memory location.
• Arrays have a fixed size determined at the time of declaration.

• Elements in an array are accessed using an index starting from 0.

• Example: string[] names = {"Alice", "Bob", "Charlie"};
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Q2. About projects in ug
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