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Lesson 3

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Questions and Answers

What is a thread in computing?

A sequence of stored data

A type of computer process

A unit for allocating system memory

A basic unit of CPU utilization (correct)

What is a benefit of multi-threading in an operating system?

Increases the complexity of a program

Requires more memory than single-threading

Slows down the execution of tasks

Allows a process to perform more than one task at a time (correct)

What is the difference between concurrency and parallelism?

There is no difference; they are the same

Concurrency is for single-core CPUs, parallelism is for multi-core CPUs only

Concurrency involves task order, parallelism requires tasks to be the same

Concurrency is task coordination, parallelism is doing tasks at the same time (correct)

In a multi-threading model, what does the term 'one-to-one mapping' refer to?

Each user-level thread maps to one kernel thread Signup and view all the answers

What is the main difference between user threads and kernel threads?

User threads are managed by the application, kernel threads by the OS Signup and view all the answers

What is a thread pool?

A group of threads pre-created and waiting for tasks. Signup and view all the answers

How is concurrent execution achieved on a single-core system?

By quickly switching between tasks to give the appearance of simultaneous execution Signup and view all the answers

How is thread cancellation achieved in pthreads?

By calling pthread_cancel(). Signup and view all the answers

What is the many-to-many threading model?

Allows many user-level threads to be mapped to many kernel threads. Signup and view all the answers

What does a thread pool in a multi-threaded application do?

Provides a set of initialized threads that stand by to handle tasks. Signup and view all the answers