Questions
Answer the following questions to test your knowledge of this chapter:
- What is whitespace? Give some examples.
 - What are the two essential properties that determine a valid C string?
 - Can an array that holds a C string have more elements than characters? Can it have fewer array elements than characters?
 - What is the difference between 
'x'and"x"? - What is the difference between an empty string and a 
NULLstring? - Is the 
"Hello"literal string modifiable? If so, when?