Courtesy of Sun Web Learning Center
Which two statements comparing java.lang.StringBuilder to java.lang.StringBuffer are true? (Choose two.)
A Both classes have a lastIndexOf method.
B Both classes' key methods are synchronized.
C Only StringBuffer has a lastIndexOf method.
D Only StringBuilder has a lastIndexOf method.
E Only StringBuffer's key methods are synchronized.
F Only StringBuilder's key methods are synchronized.
A and E are correct. You don't have to memorize all of these classes' methods, but you have to know that they share the same methods.