A question about 'single-threaded mode'

[Tiffiny Yang]

Mock QUESTION :
If a servlet is designed to execute in single-threaded mode as part of a distributed Web application, which is true?
A. The servlet container must only instantiate one instance of the servlet within each Java Virtual Machine.
B. The servlet definition in the Web application deployment descriptor must include the element.
C. The servlet container may instantiate multiple instances of that servlet in each Java Virtual Machine within the container.
D. The servlet container manages the thread-safety of the session object within each of the Java Virtual Machines in the distributed application.

The answer is C.
Can anybody explain why? and Is the single-Thread related questions on the exam ?

Thanks in advance

[PRavi kumar]

Hi,

The SingleThreadModel is not in Exam.

[Atul Sawant]

There is only one single instance of a servlet in a JVM. So, in that context i think even 'a' is correct.

[Mark Garland]

I'm not so sure.
I'm sure I remember getting an old mock question wrong once as the JVM was free to make as many instances of the servlet as it wanted, provided each was only handling one thread at once.

Open to correction.

[Manwatkar Vaibhav]

According to me, Answer C is correct because..

In Single Thread Model of Servlets, for each request, an Instance of that Servlet is newly created or an Instance from the Container Managed Pool is allocated.