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Which statements concerning the following code are true？（）  

题目
多选题
Which statements concerning the following code are true？（）   class a {   public a（） {}   public a（int i） { this（）； }   }   class b extends a {   public boolean b（String msg） { return false； }   }   class c extends b  {  private c（） { super（）； }   public c（String msg） { this（）； }   public c（int i） {}   }
A

The code will fail to compile.

B

The constructor in a that takes an int as an argument will never be called as a result of constructing an     object of class b or c.

C

Class c has three constructors.

D

Objects of class b cannot be constructed.

E

At most one of the constructors of each class is called as a result of constructing an object of class c.

参考答案和解析
正确答案： B,A
解析： 暂无解析
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相似问题和答案

第1题：

In HDLC Protocol, when Supervisory Frame's type code is '00'.About the following statements, which is correct.

A．Receive Ready

B．Receive not Ready

C．Reject

D．Selective Reject


正确答案：A

第2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3题：

Which of the following statements is true? Accounts payable are ______.

A．debts owed to suppliers

B．related to purchases of goods on an open account

C．current liabilities

D．all of the above


正确答案：D
解析：文章第三段提到Accounts payable are debts...on an open account.本题是关于应付账款的表述，应付账款是企业欠供应商的债务，是由于购买商品时进行赊销而形成的应付账款，应付账款属于短期流动债务。

第4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5题：

The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router. Which of the following statements is true concerning this command（）。

  • A、This command should be executed from the global configuration mode
  • B、The IP address 10.121.16.8 is the local router port used to forward data
  • C、102 is the remote DLCI that will receive the information
  • D、This command is required for all Frame Relay configurations
  • E、The broadcast option allows packets, such as RIP updates, to be forwarded across the PVC

正确答案:E

第6题：

Which of the following statements about language is NOT true?

A.Language is a system
B.Language is symbol
C.Animals also have language
D.Language is arbitrary

答案：C
解析：
本题考查语言的定义。
本题要求选不正确的，C选项，动物也有语言，错误。语言是人类在交际中使用的一套任意的声音符号系统。动物没有语言，动物只是本能发出声音。综上，应选C。
A选项，系统的，故排除。
B选项，符号，故排除。
D选项，任意的，故排除。
故正确答案为C项。

第7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8题：

All the following statements concerning the nature of language change is true except()

A language change is inevitable

B language change is abrupt

C language change is universal

D language change is extensive


答案：B

第9题：

Which statements concerning the relationships between the following classes are true？（）   class Foo {  int num；   Baz comp = new Baz（）；   }   class Bar {  boolean flag；   }   class Baz extends Foo {   Bar thing = new Bar（）；   double limit；   }  

  • A、A Bar is a Baz.
  • B、A Foo has a Bar.
  • C、A Baz is a Foo.
  • D、A Foo is a Baz.
  • E、A Baz has a Bar.

正确答案:C,E

第10题：

多选题
If p and q are primes greater than 2, which of the following statements must be true? (Indicate all such statements.)
A

p + q is even

B

pq is odd

C

p2-q2 is even


正确答案： A,B
解析：
由于所有大于2的质数都是奇数，因此p和q均是奇数，两奇数相加为偶数，所以A项正确；两奇数的乘积还是奇数，所以B项正确；两奇数的平方还各自是奇数，而两奇数的平方之差是偶数，因此C项也正确；所以选择A、B、C三项。

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