Infosys Software Engineer Interview Questions, Process, and Tips

Q1. What is microservices
Ans. 
Microservices are a software architecture design where applications are broken down into small, independent services that communicate with each other.
• Microservices are independently deployable and scalable.

• Each microservice focuses on a specific business function.

• Communication between microservices is typically done through APIs.

• Examples of companies using microservices include Netflix, Amazon, and Uber.
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Q2. Write a code for panagram
Ans. 
A panagram is a sentence containing every letter of the alphabet at least once.
• Create a function that takes a string as input

• Convert the input string to lowercase for case-insensitivity

• Iterate through each letter of the alphabet and check if it exists in the input string
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Q3. How do u balance load using load balancer
Ans. 
Load balancers distribute incoming network traffic across multiple servers to ensure no single server is overwhelmed.
• Set up multiple servers to handle incoming traffic

• Use a load balancer to distribute traffic evenly among servers

• Monitor server health and adjust load balancing algorithms as needed
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Q1. Sql queries on database
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Q2. Redis cache , level 2 caching
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Q1. Solid principles
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Q2. Method overloading and overriding
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Q1. What is record in c#
Ans. 
A record in C# is a data structure that contains a fixed number of fields of different data types.
• Records are similar to classes but are immutable by default

• They are used to group related data together

• Records are value types and are compared by value rather than by reference
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Q2. Encapsulation explanation with example
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Encapsulation is the concept of bundling data and methods that operate on the data into a single unit.
• Encapsulation helps in hiding the internal state of an object and only exposing necessary functionalities.

• It allows for better control over the data by preventing direct access from outside the object.

• Example: In a class representing a car, the variables like speed and fuel level can be encapsulated along with methods
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Q1. Explain Oops concept
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OOPs (Object-Oriented Programming) is a programming paradigm based on the concept of objects, which can contain data and code.
• OOPs focuses on creating objects that interact with each other to solve a problem

• Key concepts include encapsulation, inheritance, polymorphism, and abstraction

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

• Inheritance: allows a class to inherit properties and...read more
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Q2. Explain authentication and authorisation
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Authentication verifies the identity of a user, while authorization determines what actions they are allowed to perform.
• Authentication confirms the identity of a user through credentials like passwords or biometrics

• Authorization determines the permissions and access levels a user has within a system

• Examples include logging in with a username and password (authentication) and being able to view/edit specific files based
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Q1. It was overall good
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Q2. Project specific questions were there
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59 aptitude questions

Q1. What is normalization
Ans. 
Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.
• Normalization involves breaking down data into smaller, more manageable tables

• It helps in reducing data redundancy by eliminating duplicate data

• Normalization ensures data integrity by enforcing relationships between tables

• There are different normal forms such as 1NF, 2NF, 3NF, BCNF, etc.
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Q1. Different between boxing and unboxing?
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Boxing is the process of converting a value type to a reference type, while unboxing is the process of converting a reference type to a value type.
• Boxing is implicit, while unboxing is explicit.

• Boxing involves wrapping a value type in an object, while unboxing involves extracting the value type from the object.

• Boxing can lead to performance overhead due to memory allocation, while unboxing can lead to runtime errors if
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Q2. Define Access modifiers in .NET?
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Access modifiers in .NET are keywords used to specify the accessibility of classes, methods, and other members.
• Access modifiers include public, private, protected, internal, protected internal, and private protected.

• Public - accessible from any other code in the same assembly or another assembly.

• Private - accessible only within the containing type.

• Protected - accessible within the containing type and by derived types.

• I...read more
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