One of the biggest fears that candidates have while preparing for coding and C# interviews is being stuck on a question or not being able to articulate their answers.
And when preparing for C# interviews, it’s easy to get overwhelmed by the sheer number of concepts within this programming language.
Fortunately, there are ways to counter such scenarios and avoid them altogether.
Like any coding interview, C# interviews also follow a set interview structure, and the job description for every vacancy, yes even for the same role, can vary.
This means that by simply analyzing the job description thoroughly, you can narrow down the probable concepts and C# interview questions that the recruiters are likely to ask you.
Need more insight on C# interview questions? Read on.
You’ll get clarity on the following set of FAQs related to C# interview questions:
- What is C# and its features?
- What are some mandatory topics to prepare for C# interview questions?
- What are some topics to prepare for C# interview questions for experienced professionals?
- What are some of the most common C# interview questions that you must prepare?
What Is C#?
C# is one of the most popular components and object-oriented programming languages that can be used on the Windows .NET framework, and open source platforms.
It owes its popularity to its versatility and the fact that it is fairly easy to learn and can be used for a wide range of tasks.
Based on how often people look up language tutorials on Google, C# ranks fourth in the PPYL (Popularity of Programming Language) Index of 2022.
C# is a great programming language for developers who have a firm grasp of coding and programming fundamentals.
It can be used to develop dynamic websites, windows applications, games, etc. and its simplicity saves a lot of time for users as they need not spend hours scouring their scripts for minor errors.
Due to these reasons, C# has been steadily growing in popularity and studies show that one of every five hiring managers is looking to hire a programmer who can code with C#.
Topics to Prepare for C# Interview Questions
To probe the type of C# interview questions that recruiters are likely to ask you, you must analyze the job description and research the company to prepare for topics accordingly.
If the company you’re applying to has a broader focus, the interview questions will include broader coding questions in general.
And if the company has a specific niche like developing android applications, the C# interview questions like being primarily focused on the same.
Furthermore, you must prepare for 2 types of C# interview questions:
- C# coding interview questions that will test your knowledge of the language
- Whiteboarding C# interview questions that will require you to solve coding problems in real-time and assess your knowledge in practicality.
And depending on the seniority level of the position you’re applying for, C# interview questions can get more in-depth and complex with higher-level positions.
For instance, if you are applying for an entry-level programmer role, you can expect C# interview questions that will cover fundamental topics like:
- C# features
- Variables
- Abstraction
- Encapsulation
- Polymorphism
- Inheritance
- Object-Oriented Programming (OOP)
- NET & .NET
- SQL Server
Whereas, for seasoned programmer roles, the C# interview questions will be related to more advanced topics like the following:
| Managed or Un-managed Code | Boxing & Unboxing |
| Struct | Class |
| Enum | Enumeration |
| Static | Property |
| Extension Methods | Dispose & Finalize Methods |
| String and StringBuilder | C# Delegates and their uses |
| Sealed Class | Partial Classes |
| IEnumerable | Late & Early Binding |
| Differences between IEnumerable & IQueryable | Arrays |
| Constructor Chaining | Singleton Design Patterns |
| Indexer | Multicast Delegate |
| Difference between Equality Operator (==) and Equals() Method in C# | |
| Modifiers | |
| ArrayList | Value & Reference Types |
| Serialization | Lits |
| Collection | Jagged Array |
| Multithreading | Hashtable |
| LINQ | File Handling |
Also Read: How to draft an impressive .Net developer resume in 2022?
Common C# Interview Questions and Answers
Given below are some of the most commonly asked C# interview questions with sample answers based on the seniority level of the role:
C# Interview Questions and Answers for Freshers
How Is C# Different from C?
Sample Answer:
The basic difference between C and C# is that while the former is a procedural language, the latter is a more object-oriented language. Plus, C# supports automatic garbage collection by Common Language Runtime (CLR) while C does not. And while you need a .NET framework to operate C#, C is a platform-agnostic language.
What is Common Language Runtime (CLR)?
Sample Answer:
CLR is a basic and virtual machine component of the .NET Framework that handles program execution for various languages including C#. The architecture of CLR handles garbage collection, memory management, and security handling.
What is Garbage Collection in C#?
Sample Answer:
The process of freeing up memory captured by unwanted objects is known as garbage collection in C#. When a user creates a class object, a certain memory space is automatically allotted to the object in the heap memory. And once the user performs all the actions on the object, the memory space is wasted. Therefore, it is necessary to free up this memory. Furthermore, garbage collection occurs in 3 cases:
- When the occupied memory exceeds the allotted threshold value
- When the user calls for the garbage collection method
- If the user’s system has low physical memory
What are the Types of Classes in C#?
Sample Answer:
Based on the behavior or type, there are 4 types of classes in C# that include:
- Static classes that are defined by the keyword ‘static’ and do not allow inheritance and creation of an object
- Partial classes that are defined by the keyword ‘partial’ and allow its users to partially divide or share source (.cs) files
- Abstract classes that cannot be instantiated or cannot be used to create objects. These classes work on the OOPS concept of abstraction, which helps to extract or hide details
- Sealed classes that are created using the “sealed” keyword and cannot be inherited because they are a complete class
Also Read: What are the most commonly asked Selenium interview questions in 2022?
Key Points from the Blog
- C# is one of the most popular components and object-oriented programming languages that can be used on the Windows .NET framework, and open source platforms.
- If the company you’re applying to has a broader focus, the interview questions will include broader coding questions in general. And if the company has a specific niche like developing android applications, the C# interview questions like being primarily focused on the same.
- Entry-level programmers can expect C# interview questions that will cover fundamental topics like C# features, variables, abstraction, encapsulation, etc.
- For seasoned programmers, recruiters are likely to ask C# interview questions that cover advanced topics like managed or unmanaged code, boxing & unboxing, struct, jagged array, etc.
If you need expert assistance to prepare for C# interview questions, visit Hiration’s Career Activator Platform which offers 24x7 chat support. You can also write to us at support@hiration.com.
