Visual Programming MCQs with Answers
Practice important Visual Programming MCQs with answers and explanations.
Multiple Choice Questions
Q661: What is the purpose of the ConcurrentBag class?
- A: To provide a thread-safe, unordered collection with minimal contention
- B: To provide a thread-safe, ordered collection with fast lookups
- C: To offer a thread-safe collection with efficient sorting capabilities
- D: To ensure that all operations on the collection are synchronized and serialized
View Answer
A
Q662: How does BlockingCollection<T> handle situations when it reaches its capacity?
- A: It blocks any additional add operations until items are removed from the collection
- B: It discards new items when the capacity is reached
- C: It automatically resizes the collection to accommodate more items
- D: It throws an exception if the capacity is exceeded
View Answer
A
Q663: In the pcqueue class, what happens when you call Dispose()?
- A: It marks the collection as complete, preventing any further additions and ensuring all tasks are processed
- B: It deletes all tasks in the queue and clears the collection
- C: It pauses all processing and waits for tasks to complete
- D: It stops all tasks immediately and throws an exception
View Answer
A
Q664: What is the benefit of using ConcurrentQueue<T> over a standard Queue<T>?
- A: ConcurrentQueue
is designed to be thread-safe and handle concurrent operations without additional locking - B: ConcurrentQueue
provides better performance for single-threaded operations - C: ConcurrentQueue
offers more features for sorting and filtering than Queue - D: ConcurrentQueue
is optimized for disk-based storage rather than in-memory operations
View Answer
A
Q665: What does Task.Run do when used in parallel programming?
- A: It schedules a task to run on a thread pool thread asynchronously
- B: It executes the task immediately on the current thread
- C: It creates a new thread specifically for the task
- D: It blocks the current thread until the task completes
View Answer
A
Q666: How do you use Parallel.For to perform a computation that requires a local variable for each thread?
- A: Use the overload that takes a local initialization function, a body function, and a local finally function
- B: Use the standard Parallel.For method and initialize local variables inside the loop body
- C: Use a global variable and ensure thread safety with locking mechanisms
- D: Use Parallel.ForEach with an Action
delegate to perform the computation
View Answer
A
Q667: In which scenario would you use TaskCompletionSource<T>?
- A: To manually control the completion of a task and handle results or exceptions
- B: To automatically handle task completion and error handling
- C: To simplify the process of creating tasks without manual intervention
- D: To improve performance by avoiding the use of the await keyword
View Answer
A
Q668: How do ConcurrentStack<T> and ConcurrentQueue<T> differ in terms of item retrieval?
- A: ConcurrentStack
retrieves items in a Last-In-First-Out (LIFO) order, while ConcurrentQueue retrieves items in a First-In-First-Out (FIFO) order - B: ConcurrentQueue
retrieves items in a Last-In-First-Out (LIFO) order, while ConcurrentStack retrieves items in a First-In-First-Out (FIFO) order - C: Both classes retrieve items in the same order, but ConcurrentStack
is optimized for high-concurrency scenarios - D: Both classes retrieve items in the same order, but ConcurrentQueue
is optimized for low-concurrency scenarios
View Answer
A
Q669: How do you handle task cancellation using a CancellationToken?
- A: Pass the CancellationToken to asynchronous methods and check its status to handle cancellation
- B: Use CancellationToken only in synchronous methods to cancel execution
- C: Simply create a new CancellationToken for each task without passing it to methods
- D: Use CancellationToken to ignore exceptions and ensure tasks always complete
View Answer
A
Q670: What is the primary purpose of JavaScript in modern web development?
- A: To add interactivity and dynamic features to web pages
- B: To structure the content of web pages
- C: To style the appearance of web pages
- D: To handle server-side logic and database interactions
View Answer
A