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C# Programming :: Strings - C#

  1. Which of the following statements are true about the C#.NET code snippet given below?

    String s1, s2;  s1 = "Hi";  s2 = "Hi";
    1. String objects cannot be created without using new.
    2. Only one object will get created.
    3. s1 and s2 both will refer to the same object.
    4. Two objects will get created, one pointed to by s1 and another pointed to by s2.
    5. s1 and s2 are references to the same object.

  2. A.
    1, 2, 4
    B.
    2, 3, 5
    C.
    3, 4
    D.
    2, 5

  3. 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);

  4. A.
    ARE
    B.
    CRE
    C.
    CR
    D.
    REA
    E.
    CREATED

  5. Which of the following statements will correctly copy the contents of one string into another ?

  6. A.
    String s1 = "String"; String s2;  s2 = s1;
    B.
    String s1 = "String" ;  String s2; s2 = String.Concat(s1, s2);
    C.
    String s1 = "String";  String s2; s2 = String.Copy(s1);
    D.
    String s1 = "String";  String s2; s2 = s1.Replace();
    E.
    String s1 = "String";  String s2; s2 = s2.StringCopy(s1);

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

  8. A.
    True
    B.
    False

  9. 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);

  10. A.
    NagpuMumbair
    B.
    Nagpur Mumbai
    C.
    Mumbai
    D.
    Nagpur
    E.
    NagpurMumbai

  11. If s1 and s2 are references to two strings, then which of the following is the correct way to compare the two references?

  12. A.
    s1 is s2
    B.
    s1 = s2
    C.
    s1 == s2
    D.
    strcmp(s1, s2)
    E.
    s1.Equals(s2)

  13. Which of the following snippets are the correct way to convert a Single into a String?

    1. Single f = 9.8f;  String s; s = (String) (f);
    2. Single f = 9.8f;  String s; s = Convert.ToString(f);
    3. Single f = 9.8f;  String s; s = f.ToString();
    4. Single f = 9.8f;  String s; s = Clnt(f);
    5. Single f = 9.8f;  String s; s = CString(f);

  14. A.
    1, 2
    B.
    2, 3
    C.
    1, 3, 5
    D.
    2, 4

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

    String s1="Kicit"; Console.Write(s1.IndexOf('c') + " ");  Console.Write(s1.Length);

  16. A.
    3 6
    B.
    2 5
    C.
    3 5
    D.
    2 6
    E.
    3 7

  17. Which of the following is correct way to convert a String to an int?

    1. String s = "123";  int i; i = (int)s;
    2. String s = "123"; int i; i = int.Parse(s);
    3. String s = "123";  int i; i = Int32.Parse(s);
    4. String s = "123";  int i; i = Convert.ToInt32(s);
    5. String s = "123";  int i; i = CInt(s);

  18. A.
    1, 3, 5
    B.
    2, 4
    C.
    3, 5
    D.
    2, 3, 4

  19. Which of the following statements about a String is correct?

  20. A.
    A String is created on the stack.
    B.
    Whether a String is created on the stack or the heap depends on the length of the String.
    C.
    A String is a primitive.
    D.
    A String can be created by using the statement String s1 = new String;
    E.
    A String is created on the heap.