1Z0-850 試験問題を無料オンラインアクセス

Which two are true? (Choose two.)

• A.A class with a public instance variable CANNOT be well encapsulated.
• B.Polymorphism only applies when one class encapsulates another.
• C.If class B is well encapsulated, then class A can access class B's instance variables only through a method invocation.
• D.A class that extends another class CANNOT be well encapsulated.

Which three are true? (Choose three.)

• A.An abstract class CANNOT be instantiated.
• B.If abstract class B directly extends abstract class A, class B must implement all abstract methods declared in
• C.All methods in an abstract class must be abstract.
• D.If concrete class C extends concrete class B, and B implements interface A, then all methods from interface A can be invoked on an instance of C.
• E.An interface can extend multiple interfaces.

Which protocol provides an XML-based, platform-independent means of exchanging structured information?

• A.WSDL
• B.UDDI
• C.SOAP
• D.JNDI
• E.JSP

Given two complete source files:
1 . /* Example.java */
2 . package pack;
3 . public class Example { }
1 . /* Test.java */
2 . // insert code here
3 . public class Test {
4 . public static void main(String args[]) {
5 . Example obj = new Example();
6 . }
7 . }
Which, inserted at line 2 in Test.java, allows the code to compile?

• A.import pack;
• B.import pack.Example;
• C.The code compiles with no changes.
• D.import pack.Test;

Which type of primitive can be assigned a new value within a conditional expression?

• A.byte
• B.boolean
• C.int
• D.short
• E.char