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Questions and Answers
What is a critical section in multithreading?
What is a critical section in multithreading?
- A section of the code that can only be accessed by a single thread
- A section of the code that updates or reads shared memory and should not be executed simultaneously by multiple threads (correct)
- A section of the code that doesn't interact with shared memory
- A section of the code that must be executed simultaneously by multiple threads
Why is it important to minimize the use of mutable objects in concurrent programming?
Why is it important to minimize the use of mutable objects in concurrent programming?
- To increase the speed of program execution
- To enable more efficient use of shared memory
- To reduce the number of CPU cores needed for parallel execution
- To avoid data races and ensure thread safety (correct)
What does a mutex do in multithreading?
What does a mutex do in multithreading?
- Prevents threads from accessing shared memory
- Guarantees that multiple threads never execute a critical section simultaneously (correct)
- Enables multiple threads to execute critical sections at the same time
- Speeds up the execution of threads
Why are immutable data structures preferred in multithreading?
Why are immutable data structures preferred in multithreading?
What should be protected by an atomic operation or mutex in multithreading?
What should be protected by an atomic operation or mutex in multithreading?
What is one of the main concerns when writing concurrent programs in C++?
What is one of the main concerns when writing concurrent programs in C++?
Which concept in concurrent programming helps in preventing multiple threads from accessing shared resources simultaneously?
Which concept in concurrent programming helps in preventing multiple threads from accessing shared resources simultaneously?
What can lead to decreased performance in a concurrent program?
What can lead to decreased performance in a concurrent program?
What is an important consideration for running threads in parallel efficiently?
What is an important consideration for running threads in parallel efficiently?
In the context of concurrent programming, what does shared memory refer to?
In the context of concurrent programming, what does shared memory refer to?
What is the main concern when dealing with shared data in a multithreading environment?
What is the main concern when dealing with shared data in a multithreading environment?
What does TLS stand for in the context of multithreading?
What does TLS stand for in the context of multithreading?
In a multithreading environment, what is the consequence of having a data race?
In a multithreading environment, what is the consequence of having a data race?
Why is it important to ensure no other thread is accessing shared data during mutation?
Why is it important to ensure no other thread is accessing shared data during mutation?
What happens if two threads access the same memory simultaneously, with one of them mutating the data?
What happens if two threads access the same memory simultaneously, with one of them mutating the data?
What term is commonly used to describe torn reads and torn writes in multithreading?
What term is commonly used to describe torn reads and torn writes in multithreading?
How many options are typically recommended to avoid data races in multithreading?
How many options are typically recommended to avoid data races in multithreading?
What is one main approach suggested to avoid data races in multithreading?
What is one main approach suggested to avoid data races in multithreading?
Why can the scheduler play a crucial role in preventing data races in multithreading?
Why can the scheduler play a crucial role in preventing data races in multithreading?
What could happen if two threads try to write to a shared variable concurrently without proper synchronization?
What could happen if two threads try to write to a shared variable concurrently without proper synchronization?
In the context of concurrent programming, what is the primary reason why a program may benefit from being concurrent?
In the context of concurrent programming, what is the primary reason why a program may benefit from being concurrent?
What is a key characteristic of concurrent programming compared to sequential programming?
What is a key characteristic of concurrent programming compared to sequential programming?
How can dividing a big task into subtasks benefit performance on machines with multiple CPU cores?
How can dividing a big task into subtasks benefit performance on machines with multiple CPU cores?
Why is it important for applications with a graphical user interface to avoid blocking the UI?
Why is it important for applications with a graphical user interface to avoid blocking the UI?
What role does shared memory play in concurrent programming?
What role does shared memory play in concurrent programming?
What is the purpose of using a mutex in multithreading?
What is the purpose of using a mutex in multithreading?
Why does the second thread in the text get blocked when reaching the critical section after the first thread has locked the mutex?
Why does the second thread in the text get blocked when reaching the critical section after the first thread has locked the mutex?
What does it mean if two threads are said to be running in parallel?
What does it mean if two threads are said to be running in parallel?
How does contention negatively affect the scalability of a concurrent program?
How does contention negatively affect the scalability of a concurrent program?
What is the role of locks in multithreading with shared memory?
What is the role of locks in multithreading with shared memory?
What term is used to describe the situation where two threads are executing simultaneously on a multicore machine?
What term is used to describe the situation where two threads are executing simultaneously on a multicore machine?
What is a major challenge when writing concurrent programs in C++ that involve shared memory between threads?
What is a major challenge when writing concurrent programs in C++ that involve shared memory between threads?
What does each thread have its own of for storing local variables and data necessary for handling function calls?
What does each thread have its own of for storing local variables and data necessary for handling function calls?
What is one advantage of sharing memory between multiple threads for communication purposes?
What is one advantage of sharing memory between multiple threads for communication purposes?
What area of multithreading poses a significant challenge in minimizing shared resources between threads?
What area of multithreading poses a significant challenge in minimizing shared resources between threads?
