10+ Volkswagen Group Technology Solution Interview Questions and Answers

JIT compiles code at runtime while AOT compiles code during build time.

• JIT stands for Just-In-Time compilation and compiles code at runtime.

• AOT stands for Ahead-Of-Time compilation and compiles code during build time.

• JIT is used in development mode while AOT is used in production mode.

• JIT compiles templates and components on the fly while AOT compiles them before runtime.

• AOT generates smaller and faster code compared to JIT.

Static class cannot be instantiated and has only static members, while singleton class allows only one instance to be created and provides a global point of access to it.

• Static class cannot be inherited, while singleton class can be

• Static class members are accessed using class name, while singleton class instance is accessed using getInstance() method

• Static class is used for utility classes, while singleton class is used for classes that need to maintain state

• Example of stati...read more

Encapsulation is hiding the implementation details while Abstraction is hiding the complexity of the system.

• Encapsulation is achieved through access modifiers like private, protected, and public.

• Abstraction is achieved through abstract classes and interfaces.

• Encapsulation is used to protect the data from outside interference.

• Abstraction is used to provide a simplified view of the system.

• Encapsulation is a way to achieve data hiding.

• Abstraction is a way to achieve modularity a...read more

Global exceptions in .Net can be handled using try-catch blocks and application-level exception handlers.

• Use try-catch blocks to handle exceptions at the method level

• Use application-level exception handlers to handle exceptions globally

• Use the Application_Error event in Global.asax to handle unhandled exceptions

• Log exceptions to a file or database for debugging purposes

• Display user-friendly error messages to the user

Deadlocks can be solved by identifying and breaking the circular wait condition.

• Identify the processes involved in the deadlock

• Identify the resources each process is holding and waiting for

• Break the circular wait condition by releasing one or more resources

• Use deadlock detection tools to identify and resolve deadlocks

• Optimize the database design and queries to minimize the occurrence of deadlocks

Unit of work in .Net is a design pattern that helps manage transactions and database connections.

• Unit of work is used to group database operations into a single transaction.

• It helps to ensure data consistency and integrity.

• It also helps to reduce the number of database connections.

• Examples of frameworks that implement unit of work are Entity Framework and NHibernate.

Repository Pattern is a design pattern that separates data access logic from business logic.

• It provides a way to access data from a data source without exposing the underlying database or data store.

• It helps in achieving separation of concerns and makes the code more modular and testable.

• It can be implemented using interfaces and classes to define a set of methods for data access.

• Examples include Entity Framework in .NET, Hibernate in Java, and Django ORM in Python.

Content negotiation is the process of selecting the best representation of a resource based on the client's request.

• It allows clients to specify the format they prefer for the response data.

• WebAPI uses the Accept header to determine the preferred format.

• It can be used to support multiple formats like JSON, XML, or plain text.

• It helps in building flexible and interoperable APIs.

An Identity Provider (IdP) is a service that authenticates users and provides identity information to other applications.

• IdP is responsible for verifying user identities and providing access tokens.

• It allows users to log in to multiple applications using a single set of credentials.

• Examples of IdPs include Google, Facebook, and Microsoft Azure Active Directory.

• IdP uses protocols such as SAML, OAuth, and OpenID Connect to communicate with other applications.

Magic tables are temporary tables created by SQL Server to hold inserted, deleted or updated data during a trigger execution.

• Magic tables are used in SQL Server triggers to access the data that caused the trigger to fire.

• They are created automatically by SQL Server and contain the inserted, deleted or updated data.

• They are named 'inserted' and 'deleted' and can be referenced in the trigger code.

• Magic tables are useful for auditing changes to data or enforcing business rules.

Temp tables are temporary tables created in memory or disk for storing data temporarily.

• Temp tables are used to store intermediate results during complex queries.

• They are created and destroyed automatically by the system.

• They can be used to improve query performance by reducing the number of disk I/O operations.

• They can also be used to simplify complex queries by breaking them down into smaller, more manageable parts.

• Examples of temp tables include #table (in-memory) and ##ta...read more

CORS stands for Cross-Origin Resource Sharing and is a security feature implemented in web browsers.

• CORS allows web servers to specify which origins are allowed to access their resources

• It is used to prevent malicious websites from accessing sensitive data

• CORS is enforced by web browsers and not by servers

• It uses HTTP headers to communicate between the server and the browser