True/False

4. JavaScript requires that all of the elements in an array be of the exact same data type. ) 5. The web is built on a three-tier client/server system. ( ) 6. After you have assigned a value to an array element, you can change it later. ( ) 7. The plus sign (+) is called the assignment operator. ( ) 8. The for statement is used for repeating a statement or series of statements as long as a given conditional expression evaluates to true. ( ) 9. Identifiers must begin with an ASCII letter. ( ) 10. In general, a programmer should use the innerHTML property instead of the textContent property. ( ) 11. To access JavaScript code that is saved in an external file, a programmer uses the js attribute of the