Answered: Which of the following suggests the use…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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QUESTION 6
Which of the following suggests the use of a Monitor Object pattern?
1.When Multiple threads of control accessing the same object concurrently and we want to ensure that only one method at a time runs within an object.
2.When we want to decouple method execution from method invocation
3.In an event-driven application where multiple service requests arriving on a set of event sources must be processed efficiently by multiple threads that share the event sources.
4.When we want to decouple asynchronous and synchronous service processing in concurrent systems, to simplify programming without unduly reducing performance.

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Step 1

Monitor Object Pattern :

The Monitor Object pattern is a concurrency design pattern used in software engineering to synchronize access to a shared resource or section of code in a multi threaded environment. This pattern is also known as the Lock Object pattern.
In the Monitor Object pattern, a monitor object is used to protect a section of code or a shared resource from concurrent access by multiple threads. The monitor object acts as a gatekeeper, allowing only one thread at a time to access the protected section of code or resource.
The basic idea behind the Monitor Object pattern is that threads wishing to access the protected section of code or resource must first acquire a lock on the monitor object. Once a thread has acquired the lock, it can safely access the protected section of code or resource. Other threads that try to acquire the lock while it is already held by another thread will block until the lock is released.

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