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Which of these statements concerning the collection interfac

题目
多选题
Which of these statements concerning the collection interfaces are true？（）
A

Set extends Collection.

B

All methods defined in Set are also defined in Collection.

C

List extends Collection.

D

All methods defined in List are also defined in Collection.

E

Map extends Collection.

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相似问题和答案

第1题：

Which statements are true concerning NAT？ （）

  • A、 NAT provides 1 to manyaddress mapping.
  • B、 NAT provides 1 to 1 address mapping.
  • C、 NAT is only useful forTCP/UDP and ICMP traffic.
  • D、 NAT can be used for all IP traffic.

正确答案:B,D

第2题：

Which of these statements concerning the collection interfaces are true？（）  

  • A、Set extends Collection.
  • B、All methods defined in Set are also defined in Collection.
  • C、List extends Collection.
  • D、All methods defined in List are also defined in Collection.
  • E、Map extends Collection.

正确答案:A,B,C

第3题：

Which statements concerning the switch construct are true？（）  

  • A、All switch statements must have a default label.
  • B、There must be exactly one label for each code segment in a switch statement.
  • C、The keyword continue can never occur within the body of a switch statement.
  • D、No case label may follow a default label within a single switch statement.
  • E、A character literal can be used as a value for a case label.

正确答案:E

第4题：

单选题
Which statement concerning the collection of fresh water is FALSE?（）
A

Fresh water may be obtained from fish

B

lifeboat covers or canopies should be washed with rain before drinking water is collected

C

Fresh water may be collected from condensation inside the life-raft

D

Freshwater cannot be produced from standing seawater


正确答案： C
解析： 暂无解析

第5题：

多选题
Concerning the figure below, if a =b, which of the following statements must be true? (Indicate all such statements.)
A

c=d

B

l and k are parallel

C

m and l are perpendicular


正确答案： C,B
解析：
根据题目中的已知信息无法推断出各直线的关系，因此B、C均不正确；而由图示可知，c和d分别是a和b的补角，由于a=b，所以c=d，A项正确。

第6题：

Which statements about the garbage collection are true？（） 

  • A、 The program developer must create a thread to be responsible for free the memory.
  • B、 The garbage collection will check for and free memory no longer needed.
  • C、 The garbage collection allow the program developer to explicity and immediately free the memory.
  • D、 The garbage collection can free the memory used java object at expect time.

正确答案:B

第7题：

单选题
Which of the following statements concerning energy is correct?（）
A

Energy can be created or destroyed

B

Energy may not be transformed

C

The total quantity of energy in the universe is always the same

D

None of the above


正确答案： D
解析： 暂无解析

第8题：

Which of the following statements concerning intellectual property is wrong？（）

  • A、Intellectual property is an intangible creation
  • B、Intellectual property in ludes patents，trademarks，copyrights，etc.
  • C、Intellectual property is a visible creation
  • D、There are some agreement sconcerning intellectual property under the WTO

正确答案:C

第9题：

单选题
Which of the following statements concerning cargo is correct?（）
A

Cargoes are any type of goods transported by any type of ships

B

Cargoes are goods transported in bulk

C

Cargoes usually include goods transported in bulk and in containers

D

Cargoes are usually packaged in containers


正确答案： D
解析： 暂无解析

第10题：

单选题
Which of the following statements concerning butterfly valves is correct?（）
A

Special tools are required for lapping or grinding

B

It is impossible to throttle flow with a butterfly valve

C

To close the valve, it is only necessary to turn the handle a quarter of a turn

D

The butterfly valve should never be used in a freshwater system


正确答案： C
解析： 暂无解析

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