单选题Which statement is true？（）A A class’s finalize（） method CANNOT be invoked explicitly.B super.finalize（） is called implicitly by any overriding finalize（） method.C The finalize（） method for a given object is called no more than once by the garbage colle

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单选题

Which statement is true？（）

A class’s finalize（） method CANNOT be invoked explicitly.

super.finalize（） is called implicitly by any overriding finalize（） method.

The finalize（） method for a given object is called no more than once by the garbage collector.

The order in which finalize（） is called on two objects is based on the order in which the two objects became finalizable.

更多“单选题Which statement is true？（）A A class’s finalize（） method CANNOT be invoked explicitly.B super.finalize（） is called implicitly by any overriding finalize（） method.C The finalize（） method for a given object is called no more than once by the garbage colle”相关问题

第1题

Which statements concerning the methods notify（） and notifyAll（） are true？ A、Instances of class Thread have a method called notify（）.B、A call to the method notify（） will wake the thread that currently owns the monitor of the object.C、The method notify（） is synchronized.D、The method notifyAll（） is defined in class Thread.E、When there is more than one thread waiting to obtain the monitor of an object， there is no way to be sure which thread will be notified by the notify（） method.

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第2题

Which statements describe guaranteed behavior of the garbage collection and finalization mechanisms？（） A、Objects are deleted when they can no longer be accessed through any reference.B、The finalize（） method will eventually be called on every object.C、The finalize（） method will never be called more than once on an object.D、An object will not be garbage collected as long as it is possible for an active part of the program to access it through a reference.E、The garbage collector will use a mark and sweep algorithm.

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第3题

Under which circumstances will a thread stop？（） A、The method waitforId（） in class MediaTracker is called.B、The run（） method that the thread is executing ends.C、The call to the start（） method of the Thread object returns.D、The suspend（） method is called on the Thread object.E、The wait（） method is called on the Thread object.

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第4题

Which statement is true if the doStartTag method returns EVAL_BODY_BUFFERED？（）A、The tag handler must implement BodyTag.B、The doAfterBody method is NOT called.C、The setBodyContent method is called once.D、It is never legal to return EVAL_BODY_BUFFERED from doStartTag.

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第5题

Which of the following statements about variables and scope are true？（） A、 Local variables defined inside a method are destroyed when the method is exited.B、 Local variables are also called automatic variables.C、 Variables defined outside a method are created when the object is constructed.D、 A method parameter variable continues to exist for as long as the object is needed in which the method is defined.

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第6题

Which methods from the String and StringBuffer classes modify the object on which they are called？（） A、The charAt（） method of the String class.B、The toUpperCase（） method of the String class.C、The replace（） method of the String class.D、The reverse（） method of the StringBuffer class.E、The length（） method of the StringBuffer class.

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第7题

Which two statements are true about using the isUserInRole method to implement security in a Java EEapplication？（）A、It can be invoked only from the doGet or doPost methods.B、It can be used independently of the getRemoteUser method.C、Can return "true" even when its argument is NOT defined as a valid role name in the deployment descriptor.D、Using the isUserInRole method overrides any declarative authentication related to the method in which it is invoked.

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OCJP(310-065)

单选题Which statement is true？（）A A class’s finalize（） method CANNOT be invoked explicitly.B super.finalize（） is called implicitly by any overriding finalize（） method.C The finalize（） method for a given object is called no more than once by the garbage colle

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