Quiz 1

operatıng systemsThe figure on the right shows the operation of the read system call in general (count-read(fd,buffer,nbytes)).What does itmean if the operating system sends a value of 200 to the library procedure at arrow 9?

Is it more efficient to employ threads that operate at the user level as opposed to those that operate at the kernel level? What sets apart threads that run on the user level from those that run on the kernel level? Is there ever a point in time when one kind is more advantageous than another?

There may be situations when user-level threads are preferable than kernel-level threads. User- and kernel-level threads vary in what ways? Does one kind outperform the others in a given situation?

Is there a circumstance where user-level threads are superior over kernel-level threads? What are the differences between user-level and kernel-level threads? Is there a circumstance in which one kind is better than the rest?

There are 5 sub-questions in this topic, each sub-question has 8 points, totaling  1.What are the main purposes of an operating system?     2. Which states do the process have? Draw a process state diagram.       3. Explain the difference between preemptive and non-preemptive scheduling.     4. Name two differences between logical and physical addresses.       5. Explain the purpose of the open() and close() operations

What are the benefits of employing threads on the user level as opposed to threads on the kernel level? What are the key differences between threads running at the user level and those running at the kernel level? Is there ever a circumstance in which one kind would be more desirable than the other?

. An executing process must be loaded entirely in main memory.What kind of a memory organization is this?

Examine the distinction between threads run by the kernel and those run by the user.

User-level threads versus kernel-level threads—which is superior? What sets user-level threads distinct from kernel-level threads? Is it ever the case that one sort is better than the other?

What's the difference between a thread running in the user's process space and one running in the kernel? Is there a favored species among the alternatives?

Which of the following is true? Select one: In general, creation time of a process is faster than creation time of a thread within a program In general, communication between two independent processes is faster than communication between two threads Parent and child processes share same instruction counter Threads of a process can share data via global variables In a multithreaded process each thread shares the instruction counter of the process

Please elaborate on the following points. A. What is the difference between user and kernel threads? B. What are Multi-threading Models?

Consider an environment in which there is a one-to-one mapping between user-level threads and kernel-level threads that allows one or more threads within a process to issue blocking system calls while other threads continue to run. Explain why this model can make multithreaded programs run faster than their single-threaded counterparts on a uniprocessor computer.

Talk about one of the issues that might crop up in an operating system when several processes are all trying to execute at the same time.

Discuss a problem that arises when several processes are running at the same time in an operating system.

Is the usage of user-level threads superior than kernel-level threads? What is the difference between user-level threads and kernel-level threads? Is there ever a period when one kind is superior than another?

Is there ever a situation in which using threads at the user level is preferable than using threads at the kernel level? What are the key distinctions between the threads that run on the user level and those that run on the kernel level? Is there ever a situation in which a certain variety is preferable to the others?

In the context of scheduling and dispatching of processes on a single-core processor, a.  What is the purpose of a context switch? b.  Describe the steps, in order, taken by a kernel to context-switch between processes.

Talk about a problem with shared processing in an operating system.

if ten threads are running within a program and one of them request I/O and blocks in the kernel, what will happen to the rest of the threads if they are:   A kernel managed B user managed   what will happen if the same task is accomplished using multitasking rather than multithreading?

Hello. Please answer the attached Operating Systems questions correctly and completely.*If you answer the questions correctly and completely, I will give you a thumbs up. Thanks.

Give me Answer fast.

a) List the main tasks of an Operating System. b) Draw the main elements of a computer system. c) What is an interrupt? How it is generated? What is a trap? d) What is an interrupt vector? e) What is a system call? Which types of system call do you know? f) In a time-sharing environment, several users share the system simultaneously: How can we reach MM protection? g) In a time-sharing environment, several users share the system simultaneously: How can we reach I/O protection? h) Draw the diagram of 5 process states. What is the semantic of every state? How does a process move from one state to the other?