What will be the return value if the function fn is called with a value of 50 for the parameter var?

public int fn(int var)

{

    int retvar = var - (var / 10 * 5);

    return retvar;

}

Which of the following code snippets converts an IEnumerable into a string containing comma separated values?

Which of the following is true regarding a null and an empty collection in C#?

Which of the following statements are true regarding the ref and out parameters in C#?

What is the difference between the String and StringBuilder class objects with respect to mutability?

Which of the following code samples will create a comma separated list from IList or IEnumerable?

Which option is an Value type?

Which keyword is used to terminate the execution at a particular stage of a statement?

What is GC?

Does C# support multiple inheritance?

False or True? Tuple is faster than KeyValuePair in every test, except in allocation performance.