18 Questions
What is a critical resource in the context of operating systems?
A resource that can only be accessed by one program at a time
Why do processes have to express the requirement for mutual exclusion and not the operating system?
Operating systems cannot understand detailed process requirements
What is a critical section in the context of a program?
A portion of code that modifies common variables
Why does the critical section problem arise in designing protocols for processes?
To synchronize access to shared resources among processes
In the context of a system with n processes, what must each process do in relation to its critical section?
Ask permission to enter the critical section and exit after use
Why is it crucial for only one process to be in its critical section at any given time?
To enforce mutual exclusion and prevent race conditions
What is the primary purpose of an operating system in managing concurrent processes?
To protect shared resources and data from interference
In the example provided, what are the possible final values of b and c if P3 executes before P4?
b = 3, c = 5
What is the critical section problem in the context of concurrent processes?
The need to ensure that only one process can access a shared resource at a time
What is the role of the operating system in allocating and deallocating resources for active processes?
To manage the allocation and deallocation of resources based on process requests and availability
Which of the following statements best describes the concept of mutual exclusion in operating systems?
Allowing only one process to access a shared resource at a time
In the provided example, what is the purpose of using process control blocks (PCBs) in the operating system?
To keep track of active processes and their resource requirements
Which of the following best describes a race condition?
Two or more processes are reading and writing on shared data, and the final result depends on the order of execution.
What is the purpose of mutual exclusion in concurrent programming?
To make sure that if one process is accessing a shared resource, the other processes are excluded from doing so.
Which of the following best describes a deadlock situation?
Each process owns a resource that the other process is waiting for, leading to a circular wait.
What is a critical region in concurrent programming?
The part of the program where shared variables are accessed.
Which of the following best describes an atomic operation?
A sequence of one or more statements that appears to be indivisible, and no other process can see an intermediate state or interrupt the operation.
What is starvation in the context of concurrent programming?
A situation where a process is denied access to a resource, even though no deadlock exists, and the process may be neglected indefinitely.
This quiz covers concepts of mutual exclusion, synchronization, and resource management in operating systems. Topics include managing shared global variables, tracking active processes through Process Control Blocks (PCBs), and protecting data and physical resources from interference.
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