Airtel X- Labs Senior Software Engineer Interview Questions and Answers

Q1. About Insurance Domain Knowledge
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Q1. About shift / Working hrs / Salary
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Q1. What is difference between the abstract class and interface
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Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have constructor, fields, and methods, while interface cannot have any of these.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Abstract classes are used to provide a common base for multiple classes, while interfaces define a contract that implementing...read more
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Q1. What design pattern used in angular
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The design pattern commonly used in Angular is the Observer pattern.
• The Observer pattern is used to establish a one-to-many dependency between objects.

• In Angular, Observables are used to implement the Observer pattern for handling asynchronous data streams.

• Components in Angular often use Observables to subscribe to changes and react accordingly.
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Q1. Explain oops concepts
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OOPs concepts are fundamental principles in object-oriented programming that help in organizing and designing code.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Allowing a class to inherit properties and behavior from another class.

• Polymorphism: Ability of objects to take on multiple forms or behaviors.

• Abstraction: Hiding the complex implementation details and...read more
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Q2. Explain design patterns
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Design patterns are reusable solutions to common problems in software design.
• Design patterns help in creating flexible, maintainable, and scalable software.

• They provide a common language for developers to communicate about solutions.

• Examples include Singleton, Factory, Observer, and Strategy patterns.
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Mcq and coding test on coderpad

Face 2 face, dsa and core java

Q1. Fundamentals and Basics of android, projects you are worked on.
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It was sort of pair programming where you will be told to implement some feature. Here they check your coding style, your approach and the architecture you follow.

Q1. Advanced android questions were asked and some scenario based questions.
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Q1. It was managerial round, most discussion were on my projects and past experience.
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Q1. Interface abstruct class,WCF, State management,
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Q2. Joining in sql server
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Joining in SQL Server combines rows from two or more tables based on related columns.
• INNER JOIN: Returns records with matching values in both tables. Example: SELECT * FROM A INNER JOIN B ON A.id = B.id;

• LEFT JOIN: Returns all records from the left table and matched records from the right table. Example: SELECT * FROM A LEFT JOIN B ON A.id = B.id;

• RIGHT JOIN: Returns all records from the right table and matched records f...read more
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Q3. Cursor,normalization
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Q4. Mvc data flow, dependency injuction
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Q1. Why you want to join our organization. salary negotiation,
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