What is the Thread class?

Q: What does the Thread class represent?

An individual thread of execution within a process.

Q: How do you start a thread?

By calling the Start() method on a Thread instance.

💡 Concept: Thread Class

The Thread class in C# represents an individual thread of execution within a process, providing control over thread lifecycle and behavior.

📘 Quick Intro

Thread instances enable creation, management, and synchronization of threads for concurrent execution.

🧠 Analogy

Think of the Thread class as the manager of a worker who performs a specific task concurrently with others.

🔧 Technical Explanation

🧵 Provides methods to start, pause, resume, and abort threads.
⚙️ Allows thread synchronization through methods like Join and Sleep.
🔄 Supports setting thread priorities.
🛠️ Threads run independently but share process resources.
📚 Located in System.Threading namespace.

🎯 Use Cases

✅ Running background tasks.
✅ Handling parallel operations.
✅ Improving app responsiveness.
✅ Controlling thread lifecycle explicitly.

💻 Code Example


using System;
using System.Threading;

class Program {
    static void Main() {
        Thread thread = new Thread(() => {
            Console.WriteLine(""Thread running..."");
        });
        thread.Start();
        thread.Join();
        Console.WriteLine(""Main thread completed."");
    }
}

❓ Interview Q&A

Q1: What does the Thread class represent?
A: An individual thread of execution.

Q2: How do you start a thread?
A: Using the Start() method.

Q3: What does Join() do?
A: Waits for thread completion.

Q4: Can threads share data?
A: Yes, within the same process.

Q5: How to pause a thread?
A: Using Sleep() method.

Q6: What namespace contains Thread?
A: System.Threading.

Q7: Can you set thread priority?
A: Yes, with Priority property.

Q8: What happens if you abort a thread?
A: Thread is terminated prematurely.

Q9: What is a background thread?
A: A thread that does not prevent process termination.

Q10: Why is thread synchronization important?
A: To avoid race conditions and deadlocks.

📝 MCQs

Q1. What does the Thread class represent?

Process
An individual thread of execution
Task
Method

Q2. How to start a thread?

Run()
Start()
Execute()
Invoke()

Q3. What does Join() do?

Starts thread
Pauses thread
Waits for thread completion
Kills thread

Q4. Can threads share data?

No
Yes
Sometimes
Never

Q5. How to pause a thread?

Pause()
Sleep()
Wait()
Stop()

Q6. Which namespace contains Thread?

System.IO
System.Threading
System.Net
System.Collections

Q7. Can you set thread priority?

No
Yes
Sometimes
No idea

Q8. What happens if you abort a thread?

Continues
Thread terminates
Pauses
Crashes

Q9. What is a background thread?

Blocks process
Doesn't prevent termination
Runs on UI
None

Q10. Why is thread synchronization important?

No need
Avoid race conditions
For performance
For security

💡 Bonus Insight

The Thread class gives fine-grained control over thread behavior but requires careful synchronization to avoid concurrency issues.

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