Operating System Concepts – Fork-Join Parallelism Quiz

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What is a key motivation for making modern applications multithreaded?

To decrease efficiency
To simplify the process creation
To increase the complexity of the code
To improve responsiveness and efficiency (correct)

In the context of multithreading, what is a benefit of using thread pools?

Minimizing thread creation overhead (correct)
Simplifying debugging
Reducing code complexity
Increasing resource sharing

Which term best describes a situation where a system can perform more than one task simultaneously?

Context switching
Thread splitting
Concurrency (correct)
Data dependency

What is a challenge faced by programmers in multicore or multiprocessor systems when it comes to balancing workloads?

Dividing activities (B) Signup and view all the answers

How do threads differ from processes in terms of creation?

Threads have lower overhead in creation compared to processes (B) Signup and view all the answers

Which factor contributes to threads being more economical than creating new processes?

Lower context switching overhead for threads (A) Signup and view all the answers

In the context of threading models, the 'Many-to-Many' model allows:

Many user threads to be mapped to many kernel threads. (D) Signup and view all the answers

Which threading model allows only one thread to be in the kernel at a time in a multi-core system?

Many-to-One (B) Signup and view all the answers

What is a key advantage of using 'Thread Pools' in parallel programming?

Allows each task in the program to be bound to the size of the pool. (A) Signup and view all the answers

Java Executor Framework allows thread creation around which interface?

Runnable interface (A) Signup and view all the answers

'Implicit Threading' involves which of the following?

Compiler and run-time libraries handle thread creation and management. (C) Signup and view all the answers

'Grand Central Dispatch' is a technology primarily used in which operating system?

iOS (B) Signup and view all the answers

'Fork-Join Parallelism' is best described as:

'Forking' multiple threads, then joining them back together. (C) Signup and view all the answers

'Intel Threading Building Blocks' primarily focus on:

'Explicit Threading' techniques. (A) Signup and view all the answers

'Windows Multithreaded C Program' example likely utilizes which threading model?

One-to-One (B) Signup and view all the answers

Which technology provides support for parallel programming in shared-memory environments?

OpenMP (C) Signup and view all the answers

What type of task does a RecursiveAction perform in Java's Fork-Join framework?

Does not return a result (B) Signup and view all the answers

In Grand Central Dispatch, what is the purpose of the dispatch queue marked as 'serial'?

Blocks are removed in FIFO order (A) Signup and view all the answers

Which language uses a closure for tasks submitted to dispatch queues in Grand Central Dispatch?

Swift (C) Signup and view all the answers

What is the purpose of Intel Threading Building Blocks (TBB)?

Designs parallel C++ programs using templates (C) Signup and view all the answers

Which directive is used to create as many threads as there are cores in OpenMP?

#pragma omp parallel (C) Signup and view all the answers

What is the main difference between a closure and a block in Grand Central Dispatch?

Blocks use the caret symbol, closures do not (D) Signup and view all the answers

What does a serial dispatch queue in Grand Central Dispatch ensure?

Blocks are removed in FIFO order (D) Signup and view all the answers

What statement best describes the RecursiveTask class in Java's Fork-Join framework?

Returns a result via the compute() method (C) Signup and view all the answers

What is the purpose of dispatch queues with 'concurrent' type in Grand Central Dispatch?

Execute blocks concurrently and may remove multiple at a time (B) Signup and view all the answers