Lookup

Created by info@itofthefuture.com

Welcome Anonimous.User to this quiz related to Test JSP and Servlets.

Read the question and choose the best answer. Time is limited to 40 seconds!

Important! Do not forget to rank the quality of the question (from bad to excellent).
An initiator of the quiz will get royalty score for QnAs created by her/him and can win the Top Creativity Prize.

Question:
You have to do an operation (calling custom method increaseCounter()) in the doGet-method of your Servlet that has to be performed in isolation: Only one thread must ever be in it at the same time. How can you do it?

increaseCounter();

synchronized (new Object()) {
increaseCounter();
}

synchronized (request) {
increaseCounter();
}

synchronized (getServletContext()) {
increaseCounter();
}

synchronized (this) {
increaseCounter();
}

Rank the Quality of the Question from "-10" (bad) or "0" (not clear) to 10 (correct) or even 20 (very good!)
-10 (bad/wrong) 0 (not clear) 10 (correct) 20 (very good!)

Your summary report will be available to you and your instructor. Thank you for your work!!!