单选题Which HttpSession method stores an object in a session?()A put(String name. Object value)B set(String name. Object value)C setAttribute(String name. Object value)D putAttribute(String name. Object value)E addAttribute(String name. Object value)

单选题
Which HttpSession method stores an object in a session?()
A

 put(String name. Object value)

B

 set(String name. Object value)

C

 setAttribute(String name. Object value)

D

 putAttribute(String name. Object value)

E

 addAttribute(String name. Object value)


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单选题Which statement is true?()A If only one thread is blocked in the wait method of an object, and another thread executes the modify on that same object, then the first thread immediately resumes execution.B If a thread is blocked in the wait method of an object, and another thread executes the notify method on the same object, it is still possible that the first thread might never resume execution.C If a thread is blocked in the wait method of an object, and another thread executes the notify method on the same object, then the first thread definitely resumes execution as a direct and sole  consequence of the notify call.D If two threads are blocked in the wait method of one object, and another thread executes the notify method on the same object, then the first thread that executed the wait call first definitely resumes execution as a direct and sole consequence of the notify call.

单选题Which HttpSession method stores an object in a session?()A put(String name. Object value)B set(String name. Object value)C setAttribute(String name. Object value)D putAttribute(String name. Object value)E addAttribute(String name. Object value)

多选题Upon a user’s first visit to the website, which two operations are always performed when the getSession method is called with no arguments in a servlet?()AAll URLs returned by the server are rewritten.BAn HttpSession object is created if necessary.CThe user name and password of the user are checked.DThe session ID is stored in the HTTP response as a cookie.

多选题Given an HttpServletRequest request: 22.String id = request.getParameter("jsessionid"); 23.// insert code here 24.String name = (String) session.getAttribute("name"); Which three can be placed at line 23 to retrieve anexisting HttpSession object?()AHttpSession session = request.getSession();BHttpSession session = request.getSession(id);CHttpSession session = request.getSession(true);DHttpSession session = request.getSession(false);EHttpSession session = request.getSession(jsessionid);

多选题Which statements concerning the methods notify() and notifyAll() are true?AInstances of class Thread have a method called notify().BA call to the method notify() will wake the thread that currently owns the monitor of the object.CThe method notify() is synchronized.DThe method notifyAll() is defined in class Thread.EWhen 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.