How you can make sure that a resource is not being used by numerous threads simultaneously?

Using Volatile keyword A volatile keyword is a field modifier that ensures that the object can be used by multiple threads at the same time without having any problem. volatile is one good way of ensuring that the Java program is thread-safe.

What is difference between reentrant and thread-safe functions?

A function is re-entrant, if it can be interrupted in the middle of an execution, and it’s safe to call the same function again in the same thread. A function is thread-safe, if multiple threads can execute the same function at the same time safely.

Which of the following are valid best practices for multithreading and concurrency?

Java Multithreading and Concurrency Best Practices

• Use Local Variables.
• Prefer Immutable Classes.
• Minimize locking scope.
• Prefer Thread Pool Executors instead of Threads.
• Prefer Synchronization utility over wait notify.
• Prefer BlockingQueue for Producer-Consumer Design Pattern.

How do I stop multithreading?

How to avoid issues with multiple threads

1. Avoid Nested Locks: This is the main reason for deadlock. Deadlock mainly happens when we give locks to multiple threads.
2. Avoid Unnecessary Locks: You should lock only those members which are required. Having unnecessary locks can lead to a deadlock.

Can two threads execute static and non static method concurrently?

Since both the objects are different hence both synchronized static and non-static method will not block each other in case of multi-threading. Both the methods will execute simultaneously. Yes..

How do you know if a function is reentrant?

1 Answer. The way to determine if a function is reentrant is to analyse what it does. 2) The code is not self-modifying (fortunately, self-modifying code is relatively rare in standard C or C++).