Infosys Software Engineer Interview Questions, Process, and Tips

Simple reverse string
form with validation

Q1. List vs tuple in python
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Q2. Datatypes in python
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Q1. Reverse a number
Ans. 
To reverse a number, convert it to a string, reverse the string, and convert it back to a number.
• Convert the number to a string

• Reverse the string

• Convert the reversed string back to a number
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Q2. SQL indexes and Joins
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Q1. DOTNET interview question
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Q1. What is identity in Sql.
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Identity in SQL is a property used to uniquely identify each row in a table.
• Identity columns are typically used as primary keys in tables

• They automatically generate unique values for each new row

• Identity values are often used for referencing and joining tables
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Q2. Sql query to show the number of employees joined in a particular year.
Ans. 
Use SQL query to count number of employees joined in a specific year.
• Use COUNT() function to count the number of employees.

• Use WHERE clause to filter employees based on join year.

• Group by join year to get count for each year.
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Q3. How to pass data between Child and Parent component in angular.
Ans. 
Data can be passed between Child and Parent components in Angular using @Input and @Output decorators.
• Use @Input decorator in the child component to receive data from the parent component.

• Use @Output decorator along with EventEmitter in the child component to send data to the parent component.

• Parent component can pass data to child component using property binding.

• Child component can emit events using EventEmitter to s
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Q4. What are session and how to implement them in ASP.NET webforms.
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Sessions are a way to store user-specific data on the server side in ASP.NET webforms.
• Sessions are used to store user-specific data across multiple pages during a user's visit to a website.

• In ASP.NET webforms, sessions can be implemented using the Session object.

• To store a value in a session, you can use Session['key'] = value;

• To retrieve a value from a session, you can use var value = Session['key'];

• Sessions can be us...read more
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Q5. Where do you add external dlls in asp.net webforms.
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External dlls can be added in the bin folder of the ASP.NET webforms project.
• External dlls can be added directly to the 'bin' folder of the ASP.NET webforms project.

• You can also add external dlls to a separate 'lib' folder within the project and reference them from there.

• Alternatively, you can use NuGet packages to manage external dependencies in ASP.NET webforms.
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Q6. What are the different concepts of OOPS.
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OOPS concepts include 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 details and showing only the necessary features.
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Q7. Difference between ViewState and Session.
Ans. 
ViewState stores data on the client side, while Session stores data on the server side.
• ViewState is used to store page-specific data in ASP.NET web applications.

• Session is used to store user-specific data that needs to be accessed across multiple pages.

• ViewState data is stored in a hidden field on the page, while Session data is stored on the server.

• ViewState data is available only for the current page, while Session d...read more
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Q1. Explain events loop
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Events loop is a mechanism in software development that continuously checks for and processes events in a program.
• Events loop is commonly used in event-driven programming to handle user inputs, network requests, and other asynchronous tasks.

• It allows the program to efficiently manage multiple tasks without blocking the main thread.

• Examples include JavaScript's event loop in web browsers and Node.js, which processes eve
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Q2. Explain js top 3 features
Ans. 
JavaScript's top 3 features are flexibility, ease of use, and wide adoption.
• Flexibility allows for dynamic and interactive web pages

• Ease of use makes it accessible to beginners and experienced developers alike

• Wide adoption ensures a large community for support and resources
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Leetcode easy question they asked