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# 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?

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

   * [ ] 3
   * [ ] 5
   * [ ] 7
   * [ ] 9