Part II: fill-in-the-blank questions (2 points * 10) 1. The four main principles of OOP are: encapsulation, B1, B2, and

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Part Ii Fill In The Blank Questions 2 Points 10 1 The Four Main Principles Of Oop Are Encapsulation B1 B2 And 1 (119.25 KiB) Viewed 15 times

Part II: fill-in-the-blank questions (2 points * 10) 1. The four main principles of OOP are: encapsulation, B1, B2, and B3. 2. The primitive types in Java are int, B4, long, byte, B5, float, double, and boolean. 3. Usually, we define the main function as follows: B6 void main(String[] args) ... 4. B7 polymorphism (a.k.a. method overriding) occurs during the runtime of the program, where the methods share the same name but have different implementation. 5. B8 is an engine that provides a runtime environment to drive the Java Code or 5 applications. 6. All methods of an interface are automatically B9. 7. A B10 has the same name as the class. Part III: true-false questions (2 points * 10) 1. An inner class object cannot access the members of the outer class object that created it, including private members. ( ) 2. Overloads can be distinguished by their return type. ( ) 3. A class can only extend a single class, so a class can only implement a single interface. ( ) 4. All classes in Java language contain toString() method. ( ) 5. When calling a method with variable parameters, only multiple parameters can be passed in, not arrays. ( ) 6. Interface method is abstract method in essence, and interface is a special form of abstract class. () 7. HashSet is an unordered collection that rejects duplicates. ( ) 8. The answer to the "System.out.println("abc"+1+2);” is “abc3". () 9. Map stores key-value pairs, which cannot contain duplicate values. ( ) 10. There must be a main method for each Java class. ( )