In PHP it's considered good coding practice to implement _______ try blocks in your code.

Which of the following is the postfix form of the prefix expression: * + a b c?

a) a + b c b) a + b c c) a b + c d) a b c +

The String class allows you to __________ Strings.

a) search b) retrieve characters from c) determine the number of characters in d) All of the above.