Mod 5: Thread pools

Question 1

Why would we want to limit the number of threads?

Answer 1

Thread creation is expensive, we want to decrease overhead

Question 2

What is a thread pool?

Answer 2

A thread pool is a collection of thread , where the threads is recycled

Question 3

What are an example of shared resources in thread pool?

Answer 3

The queue holding tasks waiting for an available thread

Question 4

In java, which classes are used to work with thread pools?

Answer 4

(1) Executor
(2) Executors
(3) ExecutorService

Question 5

What are some advantages of a thread pool?

Answer 5

(1) Saves resources
(2) Improved performance
(3) Prevent overload
(4) Managed way of using threads

Question 6

What is “overload”?

Answer 6

Overload occurs when overhead exceeds available time to perform tasks, and the system stops responding

Question 7

What are some dissadvantages of thread pools?

Answer 7

(1) Lack of control over specific threads
(2) Limited scalability
(3) Potential for thread starvation
(4) Complex programming
(5) Increased memory usage