Frequently Asked C# Multithreading Interview Questions & Answers

Are you wondering what kind of multithreading questions in C# are asked in an interview? The multithreading related questions C# are ideally asked for the appointment for the position of a senior developer or a technical consultant. We thought of listing out a few most possible interview questions that may be asked in a real-time interview.

C# Multithreading Interview Questions & Answers

The multithreading C# questions here can be one of the excellent options for improving your chances of getting hired. While the multithreading in C# interview questions may appear to be extremely difficult and you would find it rather a little difficult to understand about.

Q: What are the differences between Threads and Processes in C#?

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A Process is what your operating system would use for executing a program. The program does need a few resources for running, and the operating system provides these resources as part of the Process and executes the program. Each of the processes has a unique process ID, and you would be able to follow a process through the means of the task manager.

A Thread, on the other hand, is a lightweight process that is used for executing an application. A process will have at least one Thread. However, you can witness a single process with multiple threads. Each of the applications has a minimum of one Thread to execute, and this single Thread is called the main Thread.

Both processes and threads are independent sequences. However, the threads run in shared memory space, while the processes run in a separate memory.

Q: Why do you need multithreading in a project?

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This is one of the most commonly asked questions in a multithreading interview questions in C# and .NET. As the name itself should be indicative enough, multithreading is used for running multiple threads at the same time. Some of the advantages offered by the platform can include:

  • This will help you handle multiple tasks simultaneously.
  • Threads tend to be extremely lightweight than the processes.
  • The context switch between the threads would take more time than the time taken for switching between different processes.

Q: What advantages do you stand to gain with multithreading?

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If you are into .Net, you may experience this question quite invariably when preparing for your appointment. A few of the advantages you stand to gain with the multithreading can include:

  • A multithreading option ensures that you gain access to a responsive user interface.
  • It can make use of efficient and effective use of your processor time.
  • Multithreading can help you split a mammoth and CPU bound task quite efficiently. This would be more useful on a machine that has multiple CPUs and scores.

Q: What can be the disadvantages of using multithreading?

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A few of the disadvantages from the multithreading can include:

  • A single core or single processor machine can find its performance affected severely with a multithreaded process.
  • You would need to write more lines of codes for accomplishing the same task.
  • These applications can be quite difficult to write, debug, or even maintain.

Q: What is the Significance of Thread.Join and Thread.IsAlive functions in multithreading?

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Join is a method used for blocking the current Thread and keeping it waiting until the Thread that has been provided entry is executed and completed itself. It can also have a timeout, and if the timeout is not defined, the Thread that has been calling will wait indefinitely.

The IsAlive returns a Boolean True in case the Thread is still executing. Otherwise, it will return a false.

Q: Explain the ProcessProcess of ProcessProcess based and Thread based Multitasking in C#?

Here are the details of the two different types of Multitasking:

Process-Based Multitasking

Multitasking with the help of more than two processes. This ProcessProcess is controlled in its entirety by the operating system.

Thread based Multitasking #Video

As the name itself should be indicative, multitasking that involves two or more threads, this is called Thread based Multitasking. This can be something that can be controlled by the programmer and not the operating system. It has several advantages over ProcessProcess based Multitasking.

Q: What are the differences between a Lock and a Monitor?

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Lock acts as a shortcut for the Monitor statement. It is with the Compiler to convert the Lock statement into the Monitor. Enter and Exit commands. The Monitor statement does provide you with a few good options in comparison to the Lock statement.

In essence, Monitor provides you access to an improved and enhanced experience in advanced scenarios.

Some of the advanced options offered would include:

  • Monitor provides you with the TryEnter Method. This can be quite helpful when you want to specify the timeout value.
  • This can also be helpful enough in letting you check whether the Lock has been taken off or not.
  • Wait method is yet another option that assists you in releasing the currently acquired Lock.
  • It also provides you access to Pulse method that can be helpful enough in notifying the waiting thread that the state of the locked object has changed.

Well, those were a few great options for the best Multithreading in C# interview questions. If our readers have come across any of the worthy questions that you would think should have been included in this collection of C# multithreading interview questions, do share your tips with us. We will add up those questions and include the answers in this collection.