Infosys Senior Software Engineer Interview Questions, Process, and Tips

Q1. Extension methods in C#
Ans. 
Extension methods allow adding functionality to existing types without modifying them.
• Extension methods are defined in a static class.

• They must be marked with the 'this' keyword before the first parameter.

• They can be called on instances of the extended type as if they were instance methods.

• Extension methods can be used to add functionality to third-party or built-in types.

• Example: 'myString.Reverse()' where 'Reverse' i
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Q2. When an int is declare with 0 value and passed as an out parameter to a method what will be the output
Ans. 
The output will depend on the implementation of the method.
• The method may or may not modify the value of the int parameter.

• The method may or may not return a value based on the int parameter.

• Without knowing the implementation of the method, it is impossible to predict the output.
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Q3. How do you inherit a partial class
Ans. 
To inherit a partial class, use the 'partial' keyword in both the base and derived classes.
• Use the 'partial' keyword in both the base and derived classes

• Ensure that the partial classes have the same name and are in the same namespace

• Add the necessary code to the derived class to inherit the properties and methods from the base class
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Q4. What is "using" keyword
Ans. 
The 'using' keyword is used in C# to declare a code block that uses an object and automatically disposes of it when done.
• The 'using' keyword is followed by a set of parentheses that contain the object to be used.

• The object must implement the IDisposable interface.

• The 'using' block ensures that the object is disposed of when the block is exited, even if an exception is thrown.

• Example: using (FileStream fileStream = new ...read more
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Q5. Tools in visual studio for memory management, rectify unused variable and unnecessary code
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Q6. Why do we need WebAPIs
Ans. 
WebAPIs allow communication between different systems and enable access to data and functionality over the internet.
• WebAPIs provide a standardized way for different systems to communicate with each other over the internet.

• They allow access to data and functionality from remote servers, enabling the creation of web and mobile applications.

• WebAPIs can be used to integrate different systems, such as payment gateways, soci...read more
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Q7. Can DML statements be written in functions
Ans. 
Yes, DML statements can be written in functions.
• Functions can contain DML statements like INSERT, UPDATE, DELETE.

• Functions can also return values based on the DML statements executed.

• However, functions cannot be used to execute DDL statements like CREATE or ALTER.
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Q8. What are triggers in sql
Ans. 
Triggers in SQL are special types of stored procedures that are automatically executed in response to certain events.
• Triggers can be used to enforce business rules or data integrity

• They can be executed before or after an INSERT, UPDATE, or DELETE statement

• Triggers can also be used to audit changes to data

• Examples of triggers include sending an email notification when a new record is inserted or updating a related table
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Q9. How to you fetch a record from table
Ans. 
To fetch a record from a table, use SELECT statement with appropriate conditions.
• Use SELECT statement with appropriate columns and table name

• Add conditions using WHERE clause to filter the record

• Use LIMIT clause to limit the number of records returned

• Example: SELECT * FROM users WHERE id = 1 LIMIT 1
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Q10. Inbuilt methods that follow overriding
Ans. 
Inbuilt methods that follow overriding
• In Java, methods that can be overridden are marked with the 'override' keyword

• The overridden method must have the same name, return type, and parameters as the original method

• The 'super' keyword can be used to call the overridden method from the subclass

• Overriding can be used to provide a different implementation of a method in a subclass
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30 questions were asked. 60 minutes time. Topics were from aptitude and logical reasoning.

The topic of GD was 'Can India become a 5 trillion dollar economy?'

Q1. Fundamental concepts of data structures and databases
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Q2. Questions related to system designs were asked
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Q3. My experience of working in the previous organization was discussed
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Q4. My expectations about the role and the company were discussed
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Q1. Tell me about yourself
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Q2. What are your salary expectations?
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Q3. What are your salary expectations and what can be done?
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Q1. There was technical round asked in SQL, MVC, C# question. this was not very hard.
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Q1. What is Agile methodoly?
Ans. 
Agile methodology is an iterative approach to software development that emphasizes flexibility and customer satisfaction.
• Agile values individuals and interactions over processes and tools

• It emphasizes working software over comprehensive documentation

• It involves frequent collaboration with customers and stakeholders

• It encourages adapting to changing requirements and feedback

• Examples of Agile methodologies include Scrum,
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It was mass placement from our college. First round was an aptitude test which had direct filtration.

Q1. Second round was one on one technical interview. It was based on OOPS concepts and core C++ concepts.
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Q2. What is OOP? Write pseudo code to design library management system. What is RDBMS. Write a program to reverse a string.
Ans. 
OOP stands for Object-Oriented Programming, a programming paradigm based on the concept of objects.
• OOP focuses on creating objects that contain both data and methods to manipulate that data.

• Encapsulation, inheritance, and polymorphism are key principles of OOP.

• Example: In a library management system, you could have objects like Book, Patron, and Library.

• Example: Inheritance allows a FictionBook class to inherit propert
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Q1. Tell your experience
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Q2. Told my projects which i have worked
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Q1. Salary package how much
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Q1. Oops concepts step
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Q2. Multi threadeding
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Q1. Casual discussion
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Q2. Ctc discussion and personal info
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