a. Anywhere the .(dot) operator is used, the  could be used instead.
b. Anywhere the  operator is used, the .(dot) could be instead.
c. If the .(dot) operator is used to acess a bean property but the property doesnot exist, then a runtime exception is thrown.
d. There are some situations where the .(dot) operator must be used and other situations where the  operator must be used.