单项选择题

Which code should be inserted at line 1 of Demo.java to compile and run Demo toprint "pizzapizza"?()

A.import utils.*;
B.static import utils.*;
C.import utils.Repetition.*;
D.static import utils.Repetition.*;
E.import utils.Repetition.twice();
F.import static utils.Repetition.twice;
G.static import utils.Repetition.twice;


您可能感兴趣的试卷

你可能感兴趣的试题

1.单项选择题

What is the result?()

A.test
B.null
C.An exception is thrown at runtime.
D.Compilation fails because of an error in line 1.
E.Compilation fails because of an error in line 4.
F.Compilation fails because of an error in line 5.

2.单项选择题

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;

4.单项选择题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/java,and set the CLASSPATH to include /stuff/java
B.put Poker.jar in directory /stuff/java,and set the CLASSPATH to include /stuff/java/*.jar
C.Put Poker.jar in directory /stuff/java,and set the CLASSPATH to include /stuff/java/Poker.jar
D.put Poker.jar in directory /stuff/java/games/cards,and set the CLASSPATH to include /stuff/java
E.put Poker.jar in directory /stuff/java/games/cards,and set the CLASSPATH to include /stuff/java/*.jar
F.put Poker.jar in directory /stuff/java/games/cards,and set the CLASSPATH to include /stuff/java/Poker.jar

5.单项选择题

What is the result?()

A.s=14
B.s=16
C.s=10
D.Compilation fails.
E.An exception is thrown at runtime.

6.多项选择题

What two must the programmer do to correct the compilation errors?()

A.insert a call to this() in the Car constructor
B.insert a call to this() in the MeGo constructor
C.insert a call to super() in the MeGo constructor
D.insert a call to super(vin) in the MeGo constructor
E.change the wheelCount variable in Car to protected
F.change line 3 in the MeGo class to super.wheelCount=3

8.多项选择题

What are four valid examples of polymorphic method calls?()

A.x.a2();
B.z.a2();
C.z.c1();
D.z.a1();
E.y.c1();
F.x.a1();

9.单项选择题

What is the result?()

A.peep
B.bark
C.meow
D.Compilation fails.
E.An exception is thrown at runtime.

10.单项选择题

What is the result?()

A.Afoo,Afoo
B.Afoo,Bfoo
C.Bfoo,Afoo
D.Bfoo,Bfoo
E.Compilation fails.
F.An exception is thrown at runtime.