Java Quiz 1. Can we have any number of classes in a Java source file Yes No 2. The class which inherits the properties of other is known asi. Super classii. Sub classiii. Derived class ii & iii i & ii i & iii 3. What are the two common characteristics shared by all objects in Java? State and behavior Methods and interfaces Class and Methods Methods and messages 4. What is the default value of the local variables? 0 null no default value depends on the data type 5. An object which has no referrence is known as annonymous object True False 6. Which of the following is not a part of OOPs Type checking Polymorphism Multitasking Information hiding All of the above 7. Can you compare between the boolean and int primitive data types? Yes No 8. The class whose properties are inherited are is known as i. Sub classii. Super classiii. Base class ii & iii i & iii i & ii None of the above 9. Choose the appropriate data type for this value 9.9 String int double boolean 10. Can you save the java source file without any name (say ".java")? Yes No 11. Who is known as the founder of Java James Gosling Guido Van Rossum Doug Cutting 12. If you want your condition to depend upon 2 conditions both being true, what is the proper notation to put between the two Boolean statements | || & && 13. Java keywords are written in lowercase as well as upper case True False 14. What is the correct syntax for java main method? public static Void main (string [] args) public static void main (string [] args) public static void main (String [] args) public static void main (String [] Args) 15. Which statement is correct The JRE is smaller than the JDK so it needs less Disk space. The JRE is smaller than the JDK so it needs more Disk space. The JDK needs less Disk space as it doesn't contains the JRE. None of the above 16. When a class is based on another class, it inherits Data Methods Data and methods None of the above 17. An object that has more than one form is referred to as Abstract class Inheritance Interface Polymorphism 18. Runtime polymorphism can be achieved by data members Yes No 19. Java runs on which platform Windows Unix/Linux Mac All of the above 20. Annonymous object can be used at the time of object creation only True False 21. What is the size of a char in Java 4 bits 6 bits 8 bits 16 bits 22. Static methods cannot be accessed directly from the class level Yes No 23. Data hiding is also known as Encapsulation Inheritance Data binding 24. Which of the following is not a Java keyword try static new integer 25. An object could be an algorithm a data container a program anything Time is Up! Time's up
