Multiple Choice

1. Which of the statements below has no valid value for initializing a String variable?

   • String text = null;

   • String text = "Hello World";

   • String text = "There are " + 4 + " people waiting before you";

   • String text = '\n';

2. How do we call the special characters in a string that are preceded with a backslash \?

   • Insert characters

   • Meta characters

   • Terminators

   • Escape characters

3. What is an immutable object?

   • An object that was instantiated without an existing class

   • An object that was instantiated without the new keyword

   • An object for which the reference cannot be saved into a variable

   • An object whose internal state cannot be changed

4. How many String object will exist at the end of the following code block?

    String hello = "Hello";
    String world = " World";
    String bye = "Bye";
    String greeting = hello + world;
    String goodbey = bye + world;

   • 3

   • 5

   • 7

   • 9