C# Programming Questions and Answers

What is the Size of ‘Char’ datatype?

Choose the output for the following set of code.

staticvoid Main(string[] args)

{

     char c = 'g'

     string s = c.ToString();

     string s1 ="I am a human bein"+ c;

     Console.WriteLine(s1);

     Console.ReadLine();

}

Select the correct differences between char and varchar datatypes?

1. varchar is non unicode and char is unicode character datatype

2. char is ‘n’ bytes whereas varchar is actual length in bytes of data entered in terms of storage size

3. varchar is variable in length and char is the fixed length string

4. For varchar, if a string is less than the maximum length then it is stored in verbatim without any extra characters while for char if a string is less than the set length it is padded with extra characters to equalize its length to given length

Which of the following will be the correct output for the C#.NET code snippet given below?

String s1 = "Nagpur";
String s2;
s2 = s1.Insert(6, "Mumbai"); 
Console.WriteLine(s2);

The string built using the String class are immutable (unchangeable), whereas, the ones built- using the StringBuilder class are mutable.

Which of the following will be the correct output for the C#.NET code snippet given below?

String s1 = "ALL MEN ARE CREATED EQUAL";
String s2;
s2 = s1.Substring(12, 3); 
Console.WriteLine(s2);