SCJP程序员认证考试
多选题Given the following code， which statements concerning the objects referenced through the member variables i， j and k are true， given that any thread may call the methods a， b and c at any time？ （） class Counter { int v = 0； synchronized void inc（）
题目
i.v is guaranteed always to be 0 or 1.
j.v is guaranteed always to be 0 or 1.
k.v is guaranteed always to be 0 or 1
j.v will always be greater than or equal to k.v at any give time.
k.v will always be greater than or equal to j.v at any give time.
参考答案和解析
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
第2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3题：
A language change is inevitable
B language change is abrupt
C language change is universal
D language change is extensive
第4题：
c=d
l and k are parallel
m and l are perpendicular
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5题：
Given the following code fragment： public void create（） { Vector myVect； myVect = new Vector（）； } Which of the following statements are true？（）
- A、 The declaration on line 2 does not allocate memory space for the variable myVect.
- B、 The declaration on line 2 allocates memory space for a reference to a Vector object.
- C、 The statement on line 2 creates an object of class Vector.
- D、 The statement on line 3 creates an object of class Vector.
- E、 The statement on line 3 allocates memory space for an object of class Vector.
正确答案:A,D,E
第6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7题：
If a vessel subject to PSC inspection, PSC Officer shall give the inspection to the Captain, the given timeframe for rectification of each deficiency is commonly given in a coded form which called “action code”, which code listed below is used for indication of detention of the vessel?（）
- A、10
- B、30
- C、17
- D、16
正确答案:B
第8题：
A.The application will crash.
B.The code on line 29 will be executed.
C.The code on line 5 of class A will execute.
D.The code on line 5 of class B will execute.
E.The exception will be propagated back to line 27.
第9题：
Energy can be created or destroyed
Energy may not be transformed
The total quantity of energy in the universe is always the same
None of the above
第10题：
10
30
17
16