Infosys Senior Systems Engineer Interview Questions, Process, and Tips

If you join as a fresher you gave to give aptitude test

Q1. What is method overloading and method overring
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Q1. Regarding maths
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Q2. Write sql to get highest mark scored by students
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Q3. What is difference between a+b2 and (a+b)2
Ans. 
The expressions a+b2 and (a+b)2 represent different mathematical operations with distinct results.
• a+b2 means 'a plus b squared', calculated as a + (b * b). Example: If a=2 and b=3, then 2 + 3^2 = 2 + 9 = 11.

• (a+b)2 means 'the sum of a and b squared', calculated as (a + b) * (a + b). Example: If a=2 and b=3, then (2 + 3)^2 = 5^2 = 25.

• The first expression focuses on b's value, while the second combines both a and b before...read more
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Q4. What will you do if we have system it crashed due to your changes what is first step you do
Ans. 
Assess the situation, gather information, and implement a rollback to restore system functionality quickly.
• Assess the impact: Determine which systems are affected and the severity of the crash.

• Gather logs: Check system logs and error messages to identify what changes caused the crash.

• Communicate: Inform stakeholders about the issue and the steps being taken to resolve it.

• Rollback changes: If possible, revert to the las...read more
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Q5. Why did you take maths as subject
Ans. 
I chose mathematics for its logical structure, problem-solving skills, and its applicability in various fields, including engineering.
• Mathematics enhances analytical thinking, crucial for systems engineering.

• It provides a foundation for understanding algorithms and data structures.

• Math is essential for modeling and simulating complex systems.

• For example, calculus is used in optimization problems in engineering.

• Statisti...read more
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Q1. What are the Object-Oriented Programming (OOP) concepts that a fresher should be familiar with?
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Those where basics not very hard

Q1. Oops concepts and core java including loops
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Q2. Conditional statements and overloading and overriding
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Basic aptitude questions and analytical

Q1. Write program to find largest number from array
Ans. 
Program to find largest number from array of strings
• Convert array of strings to array of integers

• Use a loop to iterate through the array and compare each element to find the largest number

• Return the largest number found
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Aptitude, Algorithm & puzzle

Q1. What are Oops concepts
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Oops concepts refer to Object-Oriented Programming principles such as Inheritance, Encapsulation, Polymorphism, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation det
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Q2. Explain SDLC life cycle
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SDLC life cycle is a process used by software development teams to design, develop, and test high-quality software.
• 1. Planning: Define project scope, requirements, and timeline.

• 2. Analysis: Gather and analyze user requirements.

• 3. Design: Create a detailed design plan for the software.

• 4. Implementation: Develop the software based on the design.

• 5. Testing: Test the software for bugs and issues.

• 6. Deployment: Release the ...read more
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