当前分类： OCJP(310-065)
问题：多选题Given： 35.String #name = "Jane Doe"； 36.int $age = 24； 37.Double _height = 123.5； 38.double ~temp = 37.5； Which two statements are true？（）ALine 35 will not compile.BLine 36 will not compile.CLine 37 will not compile.DLine 38 will not compile....
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问题：单选题A company that makes Computer Assisted Design （CAD） software has， within its application， some utilityclasses that are used to perform 3D rendering tasks. The company’s chief scientist has just improved theperformance of one of the utility classes’ key...
问题：单选题Given： What is the result？（）A 2.1.0B 2.1.1C 3.2.1D 3.2.2...
问题：单选题Given： What is the result？（）A BB The code runs with no output.C Compilation fails because of an error in line 12.D Compilation fails because of an error in line 15.E Compilation fails because of an error in line 18....
问题：单选题Given： What is the result？（）A test endB Compilation fails.C test runtime endD test exception endE A Throwable is thrown by main at runtime....
问题：多选题Which two statements are true about the hashCode method？（）AThe hashCode method for a given class can be used to test for object equality and object inequality for that class.BThe hashCode method is used by the java.util.SortedSet collection class to or...
问题：多选题Given： Which four code fragments， inserted independently at line 7， will compile？（）Apublic void m1（） { }Bprotected void m1（） { }Cprivate void m1（） { }Dvoid m2（） { }Epublic void m2（） { }Fprotected void m2（） { }...
问题：单选题Given a method that must ensure that its parameter is not null： 11. public void someMethod（Object value） { 12. // check for null value ... 20. System.out.println（value.getClass（））； 21. } What inserted at line 12， is the appropriate way to handle a null...
问题：多选题Given a class whose instances， when found in a collection of objects， are sorted by using the compare To method， which two statements are true？（）AThe class implements java.lang.Comparable.BThe class implements java.util.Comparator.CThe interface used t...
问题：单选题Given： Which code， inserted at line 14， allows the Sprite class to compile？（）A Direction d = NORTH；B Nav.Direction d = NORTH；C Direction d = Direction.NORTH；D Nav.Direction d = Nav.Direction.NORTH；...
问题：多选题Which four statements are true？（）AHas-a relationships should never be encapsulated.BHas-a relationships should be implemented using inheritance.CHas-a relationships can be implemented using instance variables.DIs-a relationships can be implemented usin...
问题：单选题Given： 11.double input = 314159.26； 12.NumberFormat nf = NumberFormat.getInstance（Locale.ITALIAN）； 13.String b； 14.//insert code here Which code， inserted at line 14， sets the value of b to 314.159，26？（）A b = nf.parse（ input ）；B b = nf.format（ input ）；...
问题：单选题Given a valid DateFormat object named df，and 16.Date d = new Date（0L）； 17.String ds = "December 15， 2004"； 18.//insert code here What updates d’s value with the date represented by ds？（）A 18. d = df.parse（ds）；B 18. d = df.getDate（ds）；C 18. try {19. d =...
问题：多选题Given： Which two statements are true？（）AThe output could be 8-1 7-2 8-2 7-1BThe output could be 7-1 7-2 8-1 6-1CThe output could be 8-1 7-1 7-2 8-2DThe output could be 8-1 8-2 7-1 7-2...
问题：单选题Given： 22.StringBuilder sb1 = new StringBuilder（"123"）； 23.String s1 = "123"； 24.// insert code here 25.System.out.println（sb1 + " " + s1）； Which code fragment， inserted at line 24， outputs "123abc 123abc"？（）A sb1.append（abc）； s1.append（abc）；B sb1.appe...
问题：单选题Given： Which statement is true？（）A Compilation fails because the hashCode method is not overridden.B A HashSet could contain multiple Person objects with the same name.C All Person objects will have the same hash code because the hashCode method is...
问题：多选题Given： Which two methods， inserted independently at line 17， correctly complete the Sales class？（）Adouble getSalesAmount（） { return 1230.45； }Bpublic double getSalesAmount（） { return 1230.45； }Cprivate double getSalesAmount（） { return 1230.45； }Dprote...
