Før Quiz - Prosesser

Question 1

Threads can share the virtual address space

Answer 1

True

Question 2

Select the true statement:

Answer 2

After each interrupt, the interrupted process returns to precisely the same state it was in before the interrupt occurred.

Question 3

When talking about processes, daemons are _________

Answer 3

processes that stay in the background to handle some activity such as email, web pages, printing, and so on.

Question 4

A single-core CPU can run many processes, but at any one instant the CPU is running only one process.

Answer 4

True

Question 5

A computer with only one CPU is seemingly running several program in parallel (e-mail, browser, word). How is this possible?

Answer 5

The different programs are assigned different timeslices to run, and the CPU is switching back and forth between them.

Question 6

Hva er en atomic action i forbindelse med prosesser?

Answer 6

Det er den minste handlingen som kan utføres av prosessoren. Enten er den helt utført eller ikke påbegynt i det hele tatt.

Question 7

When booting up the system on a PC, only one process is started. All other processes are started by the user afterwards.

Answer 7

False

Question 8

Hvor mye raskere er det å opprette en ny tråd enn en prosess?

Answer 8

mellom 10 - 100 ganger raskere

Question 9

Multiprogramming systems are systems where the CPU is rapidly switching back and forth between processes.

Answer 9

True

Question 10

Linux has no concept of a process hierarchy

Answer 10

False

Question 11

Multiprograming is when processes are actually running in parallel, not only pseudo-parallel where the CPU is switching back and forth between processes.

Answer 11

False

Question 12

Is it possible that a race condition occurs when running on a CPU with only one core?

Answer 12

Yes

Question 13

A process is an instance of an executing program.

Answer 13

True

Question 14

Hva er den beste beskrivelsen av en ‘race condition’?

Answer 14

To eller flere tråder som kjemper om en ressurs og utfallet avhenger av synkroniseringen av trådene.

Question 15

There is only one physical program counter register in the CPU. When a process is running, the program counter belonging to that process is loaded into this register.

Answer 15

True

Question 16

In which of the following situations can a race condition occur?

Answer 16

When two or more processes are simultaneously trying to queue a file for printing in the same printer queue.

Question 17

How many processes can be in running-state at the same time on a single-core CPU?

Answer 17

One

Question 18

If we are comparing the computer with baking a cake, which of the items belong together?

Answer 18

1. Recipe = Program
2. Person baking the cake = Processor CPU
3. Cake ingredients = Input Data
4. Activity consisting of the baker reading the recipe, fetching the ingredients and baking the cake = Process

Question 19

Context Switching between processes is faster than Context Switching between threads.

Answer 19

False

Question 20

Which states can a process have?

Answer 20

Ready, running, blocked

Question 21

Hva er forskjellen på en prosess og en tråd?

Answer 21

Tråder er tilhørende en prosess og deler denne prosessens adresseområde mellom seg.

Question 22

I hvilket tilfelle er det nyttig med tråder?

Answer 22

Når en prosess har flere oppgaver som kan utføres uavhengig av hverandre.

Question 23

A process can only have one thread

Answer 23

False

Question 24

Which definition is correct about multiprocessor systems?

Answer 24

Multiprocessor systems have two or more CPUs sharing the same physical memory.

Question 25

Hva er forskjellen på en compute-bound prosess og en I/O-bound prosess?

Answer 25

En I/O-bound prosess bruker mesteparten av tiden sin på å vente på ekstern informasjon mens en compute-bound prosess kun er begrenset av prosessoren sin hastighet.

Question 26

A process can never ask the OS to kill/terminate another process.

Answer 26

False

Question 27

When a process is waiting for input from the keyboard before it can continue, it is in the _______ state

Answer 27

blocked