当前分类： OCJP(310-065)
问题：单选题Given： foo and bar are public references available to many other threads. foo refers to a Thread and bar is anObject. The thread foo is currently executing bar.wait（）. From another thread，what provides the most reliable wayto ensure that foo will sto...
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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：单选题Which statement is true？（）A A class’s finalize（） method CANNOT be invoked explicitly.B super.finalize（） is called implicitly by any overriding finalize（） method.C The finalize（） method for a given object is called no more than once by the garbage colle...
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：单选题Given： What is the result？（）A 2.1.0B 2.1.1C 3.2.1D 3.2.2...
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：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....
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：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： 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：多选题Given： And MainClass exists in the /apps/com/company/application directory. Assume the CLASSPATH environment variable is set to "." （current directory）. Which two java commands entered at the commandline will run MainClass？（）Ajava MainClass if run fro...
问题：单选题A class games.cards.Poker is correctly defined in the jar file Poker.jar. A user wants to execute the main method of Poker on a UNIX system using the command：java games.cards. Poker What allows the user to do this？（）A put Poker.jar in directory /stuff/...
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：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：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：多选题A team of programmers is reviewing a proposed API for a new utility class. After some discussion， theyrealize that they can reduce the number of methods in the API without losing any functionality. If theyimplement the new design，which two OO principle...
问题：单选题Click the Exhibit button. What is the result？（）A Line 26 prints "a" to System.out.B Line 26 prints "b" to System.out.C An exception is thrown at line 26 at runtime.D Compilation of class A will fail due to an error in line 6....
问题：单选题A UNIX user named Bob wants to replace his chess program with a new one， but he is not sure where theold one is installed. Bob is currently able to run a Java chess program starting from his home directory /home/bob using thecommand： java -classpath /...
问题：单选题Given： What is the result？（）A No output is produced. 1 2 3B No output is produced. 2 3 4C No output is produced. 1 2 3 4D An exception is thrown at runtime. 1 2 3...
问题：单选题A UNIX user named Bob wants to replace his chess program with a new one， but he is not sure where theold one is installed. Bob is currently able to run a Java chess program starting from his home directory /home/bob using the command： java -classpath /...
