Senior .NET Developer Interview Questions

Senior .NET Developer interview questions:

In many respects, even the most technical roles require qualities that are commonly found in strong candidates for all positions. These qualities include a willingness to learn, relevant skills, and a genuine passion for the job. While college performance can provide insights into formal education, it doesn’t paint a complete picture. This is not to diminish the importance of a solid computer science background. To assess a .NET developer’s competence in computer science, consider these interview questions:

• Inquire about their understanding of fundamental algorithmic concepts.
• Engage them in a discussion about basic algorithms, including their ability to devise, analyze, and sort algorithms.
• Evaluate their knowledge of databases and their approach to data modeling.

When assessing senior .NET developers, also explore their dedication to the industry. Do they actively stay updated on the latest advancements, and if so, how? Ask about their preferred technical literature and the thought leaders they follow on platforms like Twitter and blogs. Check if they participate on Github, contribute to open-source projects, or engage in Hackathons. In summary, gauge the depth of their intellectual interest in their chosen field and how they demonstrate it. Request information about any side projects they’ve undertaken, such as game development, as committed and inquisitive candidates are likely to shine.

Computer Science questions:

• What are the advantages of a Just-in-Time (JIT) compiler, and can you identify any programming language runtimes that incorporate JIT compilation?
• How does a preemptive threading model differ from a cooperative threading model in terms of their operation and management of threads?
• What tools and methodologies do you believe are essential for implementing a Continuous Delivery solution effectively?
• How does a code point in Unicode relate to a code unit, and what is the significance of this relationship?
• In your opinion, what characteristics define a high-quality unit test, and how do they differ from functional tests?

Role-specific questions:

• How does the Intermediate Language (MSIL) fit within the broader architecture of the .NET framework?
• Can you explain the concepts of polymorphism, inheritance, and encapsulation in object-oriented programming?
• What is the purpose of the “await” keyword in C# and could you provide a use case along with the necessary code modifications to demonstrate its usage?
• How can lazy initialization be achieved in .NET, and what are the common techniques to implement it?
• Please elaborate on the meaning and usage of the “virtual” keyword in C#.
• Under what circumstances would you declare a field as “volatile,” and what does this designation signify?
• What is the Entity Framework, and what advantages does it offer when used in .NET development?
• Define Reflection in the context of .NET and provide a use case that demonstrates its benefits.
• What is the dynamic type in .NET, and could you describe a practical use case for its usage?
• Explain the concept of a Lambda expression forming a closure in C#.
• How are anonymous classes instantiated in .NET, and can they be passed as function parameters?
• In LINQ, what distinguishes the IQueryable interface from the IEnumerable interface?
• What are the advantages of utilizing the Aggregate method in LINQ?
• Is it possible to extend a class with additional methods in .NET, and if so, what are the methods to achieve this?
• How are attributes used in C# and .NET, and could you provide an example use case that demonstrates their purpose?