单选题现自： 1． interface Color { } 2. interface Weight { } 3． //insert code here 和以下足六个声明： class Boat extends Color， extends Weight { } class Boat extends Color and Weight { } class Boat extends Color， Weight { } class Boat

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单选题

现自： 1． interface Color { } 2. interface Weight { } 3． //insert code here 和以下足六个声明： class Boat extends Color， extends Weight { } class Boat extends Color and Weight { } class Boat extends Color， Weight { } class Boat implements Color， implements Weight { } class Boat implements Color and Weight { } class Boat implements Color， Weight { } 分别插入到第3行，有多少行可以编译？（）

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相似问题和答案

第1题：

A network administrator creates a layer 3 EtherChannel, bundling four interfaces into channel group 1. On what interface is the IP address configured?()

A.the port-channel 1 interface

B.the highest number member interface

C.all member interfaces

D.the lowest number member interface

参考答案：A

第2题：

下列关于loop back interface的说法()是不正确的?

A.loop back interface是CISCO路由器上缺省端口

B.loop back interface一个永远不会DOWN的逻辑端口

C.loop back interface是一个做自环测试的端口

D.loop back interface是对端使用LOOPBACK命令测试链路后本端的端口状态

参考答案：A, C, D

第3题：

Which command allows you to decode packets in JUNOS?()

A.debug packet interface-name

B.show interface extensive

C.traceoptions interface-name

D.monitor traffic interface interface-name

参考答案：D

第4题：

To troubleshoot interface problems, you can use both the disable command and the deactivate command. Which two statements are correct?（）

A、If the interface is disabled, the logical unit will administratively shutdown.
B、If the interface is deactivated, the physical interface will administratively shutdown.
C、If the interface is deactivated, the interface configuration is ignored during commit.
D、If the interface is disabled, the logical unit configuration is ignored during commit.

正确答案:B,C

第5题：

Which command allows you to view interface usage details in real-time?（）

A、user@host> debug interface interface-name
B、user@host> monitor usage interface-name
C、user@host> monitor interface interface-name
D、user@host> traceoptions interface interface-name

正确答案:C

第6题：

Whichcommandshowsif an accesslistisassignedtoaninterface?()

A.show ip interface [interface] access-lists

B.show ip access-lists interface [interface]

C.show ip interface [interface]

D.show ip access-lists [interface]

参考答案：C

第7题：

public interface A { String DEFAULT_GREETING = “Hello World”； public void method1（）； } A programmer wants to create an interface called B that has A as its parent. Which interface declaration is correct？（）

A、 public interface B extends A {}
B、 public interface B implements A {}
C、 public interface B instanceOf A {}
D、 public interface B inheritsFrom A {}

正确答案:A

第8题：

Which command shows if an access list is assigned to an interface?()

A. show ip interface [interface] access-lists

B. show ip access-lists interface [interface]

C. show ip interface [interface]

D. show ip access-lists [interface]

参考答案：C

第9题：

Which three demonstrate an “is a” relationship？（）

A、 public class X { } public class Y extends X { }
B、 public interface Shape { } public interface Rectangle extends Shape{ }
C、 public interface Color { } public class Shape { private Color color； }
D、 public interface Species { } public class Animal { private Species species； }
E、 public class Person { } public class Employee { public Employee（Person person） { }
F、 interface Component { } class Container implements Component { private Component[] children； }

正确答案:A,B,F

第10题：

A、 0
B、 1
C、 2
D、 3

正确答案:B

现自： 1． interface Color { } 2. interface Weight { }

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