Infosys System Engineer 3 Interview Questions, Process, and Tips

On mathematics, English and pseudo code

Q1. Asked questions about my line of fields since I am from mathematics background
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Q2. What is difference between a+ and +a
Ans. 
a+ and +a are different in terms of their syntax and functionality.
• a+ is used for matching one or more occurrences of 'a' in a string

• +a is used for matching one or more occurrences of the preceding character 'a' in a string

• a+ can match 'aa', 'aaa', 'aaaa', etc. in a string

• +a can match 'ba', 'ca', 'da', etc. in a string
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Q1. Self introduction
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Q2. Project discussion
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Q1. Basics of SQL knowledge
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Q2. Function of SDLC
Ans. 
SDLC stands for Software Development Life Cycle, which is a process used by software engineers to design, develop, and test software applications.
• SDLC is a systematic process for building software applications from conception to delivery.

• It consists of several phases including planning, analysis, design, implementation, testing, and maintenance.

• Each phase has its own set of activities and deliverables to ensure the qua...read more
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Q3. OOP Concept with Java
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Object-oriented programming (OOP) is a programming paradigm based on the concept of objects, which can contain data and code.
• OOP focuses on creating objects that interact with each other to solve problems.

• Java is a popular programming language that supports OOP principles such as encapsulation, inheritance, and polymorphism.

• Example: In Java, you can create a class 'Car' with attributes like 'make', 'model', and methods
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Q4. Regarding any one programing language
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Q5. Nothing hard with interview
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It was moderate. Interviewer asked me from the pointers and array topics. I think if you are freshers and looking for IT job then u must know pointers and arrays.

Q1. 2D AND 3D ARRAYS OOPS Concepts Static and non static variables. Primitive and non primitive data types
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Q2. OOPS concepts in java
Ans. 
OOPS concepts in Java refer to the principles of Object-Oriented Programming 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 of a method to do different things based on the object it is acting upon.

• Abstraction: Hidi...read more
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Q3. Primitive and non primitive data
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Q1. Problem solving questions like for example If you are working in this company and you fell in love with your co-workers. Then in that case what would you prefer if we want to relocate to some other region ...read more
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General aptitude questions mathematical

Q1. About profile other random questions
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Q2. Tell me about yourself
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