C++ Multithreading Partial Sums Code Analysis

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What is the purpose of the 'IntegrCalc' class mentioned in the code snippet?

To demonstrate the concept of mutex locks in concurrent programming

To implement a producer-consumer pattern in a multi-threaded environment

To synchronize access to shared resources using semaphores

To calculate the integral of a function using multiple threads (correct)

What does the 'func' function in the code snippet calculate?

Inverse tangent function

Natural logarithm function

Absolute value of the sine function (correct)

Absolute value of the cosine function

Which of the following is NOT a member variable of the 'IntegrCalc' class?

divisions (correct)

resLock

numProducts

ID

What is the purpose of 'slotsAvail' and 'resAvail' semaphores in the 'IntegrCalc' class?

Controlling access to shared buffer slots (B) Signup and view all the answers

In the 'Slice' struct, what does the 'divisions' member represent?

The number of divisions in an integration interval (A) Signup and view all the answers

Which mutex in the 'IntegrCalc' class is responsible for ensuring exclusive access to the 'buffer'?

l2 (A) Signup and view all the answers

'numProducts' semaphore in the 'IntegrCalc' class is used for what purpose?

Ensuring only a fixed number of threads can access shared resources (D) Signup and view all the answers

'result' pointer in the 'IntegrCalc' class is most likely used for what purpose?

Referencing the final results of function integration (D) Signup and view all the answers

'initClass' method in the 'IntegrCalc' class is primarily responsible for what action?

Initializing thread-specific variables and data structures (A) Signup and view all the answers

What is the main purpose of using semaphores in the producers–consumers problem?

Ensuring exclusive access to the shared buffer (A) Signup and view all the answers

Why should binary semaphores be avoided in the context of multiple producers and consumers?

They cannot accumulate multiple signals/increments (B) Signup and view all the answers

In the context of thread synchronization, what is a common issue associated with not properly using mutexes?

Race conditions in critical sections (A) Signup and view all the answers

How do counting semaphores contribute to solving the producers–consumers problem?

Allowing a specified number of threads to access the buffer (D) Signup and view all the answers

What characteristic of binary semaphores makes them less suitable for scenarios with multiple signals/increments?

Inability to accumulate signals (B) Signup and view all the answers

Why is it important to utilize semaphores in a synchronized system like the producers-consumers setup?

To manage access to shared resources (A) Signup and view all the answers

In the given code snippet, what does the 'slotsAvail' semaphore represent?

Number of empty buffer slots available (A) Signup and view all the answers

Which action does the 'resAvail' semaphore trigger in the 'Producer' class?

Indicate availability of resources (B) Signup and view all the answers

What is the purpose of the 'l1' and 'l2' semaphores in the code snippet?

Ensure mutual exclusion for buffer operations (B) Signup and view all the answers

Which operation is performed by the 'resAvail.acquire()' call in the 'Consumer' class?

Acquire an empty buffer slot (C) Signup and view all the answers

Considering the code snippet, what is the purpose of the 'in' and 'out' indices in the buffer?

Update buffer indices safely (A) Signup and view all the answers

'resCount' is mentioned but not protected by a mutex. What is a potential issue with this approach?

'resCount' may become corrupted by concurrent access (A) Signup and view all the answers

What is a common issue that can arise when using a semaphore for read-only access?

Resource leakage (D) Signup and view all the answers

Which type of semaphore is most suitable when a semaphore is used as a lock?

Binary (D) Signup and view all the answers

What limitation should be considered when using C++20's counting_semaphore over a general semaphore?

Cannot adjust value by more than 1 (A) Signup and view all the answers

What is the primary role of a semaphore when used as a resource counter?

Counting available resources (C) Signup and view all the answers

In the context of semaphores, what problem can occur if read-only access is not properly managed?

Resource leakage (B) Signup and view all the answers

When implementing a semaphore as a lock, what would be a significant concern to address?

Priority inversion (A) Signup and view all the answers