Advanced Operating System Set 5
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This set of Advanced Operating System Multiple Choice Questions & Answers (MCQs) focuses on Advanced Operating System Set 5
Q1 | In the Many to One model, multiple threads are unable to run in parallel on multiprocessors because :
- only one thread can access the kernel at a time
- many user threads have access to just one kernel thread
- there is only one kernel thread
- none of these
Q2 | The One to One model allows :
- increased concurrency
- decreased concurrency
- increased or decreased concurrency
- concurrency equivalent to other models
Q3 | In the One to One model when a thread makes a blocking system call :
- other threads are strictly prohibited from running
- other threads are allowed to run
- other threads only from other processes are allowed to run
- none of these
Q4 | Which of the following is the drawback of the One to One Model ?
- increased concurrency provided by this model
- decreased concurrency provided by this model
- creating so many threads at once can crash the system
- creating a user thread requires creating the corresponding kernel thread
Q5 | When is the Many to One model at an advantage ?
- when the program does not need multi-threading
- when the program has to be multi-threaded
- when there is a single processor
- none of these
Q6 | In the Many to Many model true concurrency cannot be gained because :
- the kernel can schedule only one thread at a time
- there are too many threads to handle
- it is hard to map threads with each other
- none of these
Q7 | In the Many to Many model when a thread performs a blocking system call :
- other threads are strictly prohibited from running
- other threads are allowed to run
- other threads only from other processes are allowed to run
- none of these
Q8 | before a disk can store data is known as : (choose all that apply)
- partitioning
- swap space creation
- low-level formatting
- physical formatting
Q9 | The data structue for a sector typically contains : (choose all that apply)
- header
- data area
- trailer
- main section
Q10 | The header and trailer of a sector contain information used by the disk controller such as _________ and _________.
- main section
- error correcting codes (ecc)
- sector number
- disk identifier
Q11 | The two steps the operating system takes to use a disk to hold its files are _______ and ________.
- partitioning
- swap space creation
- caching
- logical formatting
Q12 | and then starts the operating system.
- main
- bootloader
- bootstrap
- rom
Q13 | For most computers, the bootstrap is stored in ____.
- ram
- rom
- cache
- tertiary storage
Q14 | A disk that has a boot partition is called a _________. (choose all that apply)
- start disk
- system disk
- boot disk
- all of these
Q15 | Defective sectors on disks are often known as __________.
- good blocks
- destroyed blocks
- bad blocks
- none of these