Which of these classes defined in java.io and used for file-handling are abstract?A. InputStreamB. PrintStreamC. ReaderD. FileInputStreamE. FileWriter B and D Only A A and C A, B and E Only C TRUE ANSWER : ? YOUR ANSWER : ?
System class is defined in ................. java.awt package java.lang package java.util package java.io package None of these TRUE ANSWER : ? YOUR ANSWER : ?