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Questions and Answers
What is defined as the management of multiple processes within a uniprocessor system?
What is defined as the management of multiple processes within a uniprocessor system?
- Distributed Processing
- Multiprocessing
- Multiprogramming (correct)
- Concurrent Processing
Which term describes the management of processes on multiple, distributed computer systems?
Which term describes the management of processes on multiple, distributed computer systems?
- Multiprocessing
- Distributed Processing (correct)
- Multiprogramming
- Thread Management
In which type of processing is the management of multiple processes within a multiprocessor system involved?
In which type of processing is the management of multiple processes within a multiprocessor system involved?
- Multiprogramming
- Concurrency Processing
- Distributed Processing
- Multiprocessing (correct)
What does the recent proliferation of clusters exemplify?
What does the recent proliferation of clusters exemplify?
Which of the following does NOT accurately describe a type of process management?
Which of the following does NOT accurately describe a type of process management?
Which control problems must be faced in resource competition among concurrent processes?
Which control problems must be faced in resource competition among concurrent processes?
What is a primary characteristic of semaphores in concurrency management?
What is a primary characteristic of semaphores in concurrency management?
What is essential for enforcing mutual exclusion among processes?
What is essential for enforcing mutual exclusion among processes?
What is a race condition in the context of concurrent processes?
What is a race condition in the context of concurrent processes?
Which of the following encapsulates the principles of cooperation among processes through communication?
Which of the following encapsulates the principles of cooperation among processes through communication?
What is a disadvantage of using special machine instructions for mutual exclusion?
What is a disadvantage of using special machine instructions for mutual exclusion?
What is the role of a monitor in process synchronization?
What is the role of a monitor in process synchronization?
What happens to a process that halts in a context requiring mutual exclusion?
What happens to a process that halts in a context requiring mutual exclusion?
Which characteristics distinguish strong semaphores from weak semaphores?
Which characteristics distinguish strong semaphores from weak semaphores?
What must mutual exclusion mechanisms ensure during critical section access?
What must mutual exclusion mechanisms ensure during critical section access?
In which scenario is a producer/consumer problem best illustrated?
In which scenario is a producer/consumer problem best illustrated?
What challenge does the OS face regarding concurrent processes?
What challenge does the OS face regarding concurrent processes?
What is the role of an arbiter in memory access for concurrent processes?
What is the role of an arbiter in memory access for concurrent processes?
What type of processes typically leads to difficulties in determining programming errors?
What type of processes typically leads to difficulties in determining programming errors?
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Study Notes
Chapter 5
- The chapter focuses on concurrency, a concept present in three contexts: multiple applications, structured applications, and operating system structure.
- Concurrency requires efficient management of multiple processes, especially in multiprocessor and distributed systems.
- Mutual Exclusion is a crucial concept in concurrency, ensuring only one process accesses shared resources at a time. Software approaches for mutual exclusion include Dekker's algorithm, Peterson's algorithm, and monitors.
- Hardware support for mutual exclusion includes disabling interrupts and using special machine instructions (like Compare & Swap).
- Semaphores are variables with limited operations for controlling access to shared resources. They are used to ensure mutual exclusion, manage producer/consumer problems, and implement various synchronization mechanisms.
- Monitors are programming language constructs that provide an alternative approach to semaphores. They encapsulate data and procedures, allowing controlled access to shared resources.
- Message passing is another method for process communication, where processes exchange messages to coordinate their activities.
- Readers/writers problems arise when multiple processes need to access shared data, some only reading and others writing. The chapter explores strategies for handling this with varying priorities for readers and writers.
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