I have 3.5 years of experience in C#, WPF, WCF, and SQL. I received a call from Siemens via Naukri.com.

The interview process took only 2-3 hours.

The first round was a technical interview. I couldn't crack it. I don't know why. He seemed positive, but he said I could leave for the day. Perhaps due to our last conversation, he was saying that there are many projects in WinForms and asked if I was comfortable with them. I then said I didn't want to work on WinForms.

Introduce yourself.

Then he asked about in which area I am comfortable: SQL or C#?

What are the pillars of OOP?

What is function overloading and overriding called?

Is function overriding compile-time?

Then he gave me this program:

csharp Class A { public void print() { print("a"); } }

Class B : A { public void print() { print("b"); } }

1. He asked if this would be compiled.

2. If it compiled, what would be the output of: A a = new A(); B b = new B();

3. If I made the print method of class A virtual and overrode it in class B, what would be the output of question 2?

4. If I have a class C: csharp class C : A, B {}

5. Suppose I have two interfaces for classes A and B: csharp class C : IA, IB { public void print() { print("c"); } }

   Will this be compiled?

Then he asked me about the using keyword.

using (A a = new A()) Have you seen such a syntax anywhere?

Do you know what Dispose and IDisposable are?

What is a destructor?

Then he moved to WPF.

1. He drew a window with a few buttons placed in rows and columns and asked how to make them resize with the parent window when the user resizes it.
2. How would you design this in XAML? Write the code.

He drew a ComboBox with template items (name, age, photo) and then:

1. He asked me to design it in WPF.
2. He asked me to add binding.
3. He said if the photo is not displayed, show red color if sal > 1000 and green color if sal < 1000.
4. Write the code for the converter.

Then he moved to threading.

I have a textbox and two threads running in parallel. One is writing something in that textbox, and another is changing its color. Will this code work?

Have you used delegates and where?