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OCJP(310-065)單項(xiàng)選擇題每日一練(2019.01.17)

單項(xiàng)選擇題
Given：10.interface Data { public void load（）； }11.abstract class Info { public abstract void load（）； } Which class correctly uses the Data interface and Info class？（）
A.
B.
C.
D.
單項(xiàng)選擇題
A programmer has an algorithm that requires a java.util.List that provides an efficient implementation of add（0， object）， but does NOT need to support quick random access.What supports these requirements？（）
A.java.util.Queue
B.java.util.ArrayList
C.java.util.LinearList
D.java.util.LinkedList
單項(xiàng)選擇題
Given：What is the result？（）
A.end
B.Compilation fails
C.exception end
D.exception test end
E.A Throwable is thrown by main
單項(xiàng)選擇題
Given：What is the result？（）
A.Compilation fails due to an error in line 23.
B.Compilation fails due to an error in line 29.
C.A ClassCastException occurs in line 29.
D.A ClassCastException occurs in line 31.
E.The value of all four objects prints in natural order.
單項(xiàng)選擇題
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；

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