Class
Question 1 |
Which of the following is/are true about packages in Java?
1) Every class is part of some package
2) All classes in a file are part of the same package
3)If no package is specified, the classes in the file go into a special unnamed package.
4) If no package is specified, a new package is created with folder name of class and the class is put in this package
1) Every class is part of some package
2) All classes in a file are part of the same package
3)If no package is specified, the classes in the file go into a special unnamed package.
4) If no package is specified, a new package is created with folder name of class and the class is put in this package
Only 1,2 and 3 | |
Only 1,2 and 4 | |
Only 4 | |
Only 1 and 3 |
Question 1 Explanation:
Option -4 false because new package is created by using syntax package package_name which is user defined .There is no relation with class name.
Question 2 |
Which of the following is false about abstract classes in java?
If we derive an abstract class and do not implement all the abstract methods, then the derived class should also be marked as abstract using 'abstract' keyword | |
Abstract classes can have constructors. | |
A class can be made abstract without any abstract method | |
A class can inherit from multiple abstract classes |
Question 2 Explanation:
● An abstract class can have an abstract method without body and it can have methods with implementation also.
● Multiple inheritance is not possible with abstract classes.
There are 2 questions to complete.