Deck 3: Processes

Question 1

If process P₀ is switched to process P₁, state for P₀ will be saved into ____, and state from ___ will be reloaded?

A) PCB₀, PCB₀
B) PCB₀, PCB₁
C) PCB₁, PCB₀
D) PCB₁, PCB₁

Answer 1

B

Question 2

The list of processes waiting to execute on a CPU is called a(n) ____.

A) standby queue
B) device queue
C) ready queue
D) interrupt queue

Answer 2

C

Question 3

Which of the following contains memory allocated by malloc()?

A) text section
B) data section
C) heap section
D) stack section

Answer 3

C

Question 4

Which of the following cases could force a process removed from the CPU?

A) I/O request
B) fork a child
C) interrupt or time slice expired
D) all of the above

Question 5

Which of the following structures defines the process control block for Linux system?

A) task_struct
B) files_struct
C) mm_struct
D) schedu_entity

Question 6

Which of the following is true?

A) An I/O-bound process is one that spends more of its time doing I/O than it spends doing computations
B) An I/O-bound process is one that spends more of its time doing computations than it spends doing I/O
C) Both A and B
D) None of the above

Question 7

Which of the following process state will be switched from "ready" state?

A) ready
B) terminated
C) waiting
D) running

Question 8

Which of the following contains dynamically allocated data during program run time?

A) text section
B) data section
C) heap section
D) stack section

Question 9

Which of the following contains the executable code?

A) text section
B) data section
C) heap section
D) stack section

Question 10

Which of the following process state will be switched from "running" state when an I/O event occurs?

A) ready
B) terminated
C) waiting
D) new

Question 11

Which of the following contains global data?

A) text section
B) data section
C) heap section
D) stack section

Question 12

What is done by command "spy -el" on Unix and Linux systems?

A) list complete information for all processes currently active in the system
B) list complete information for all processes currently running in background
C) list complete information for all files currently open in the system
D) list complete information for all folders currently open in the system

Question 13

What is the degree of multiprogramming for a single-processor system?

A) 0
B) 1
C) 2
D) 3

Question 14

Which of the following process state will be switched from "running" state when an interrupt occurs?

A) ready
B) terminated
C) waiting
D) new

Question 15

Which of the following system calls is used to have a new program loaded into the new process's memory space?

A) fork()
B) exec()
C) wait()
D) exit()

Question 16

Which of the following memory space dynamically grows from high memory to low memory?

A) text section
B) data section
C) heap section
D) stack section

Question 17

Which of the following selects from among the processes that are in the ready queue to execute and allocate the CPU to one of them?

A) CPU scheduler
B) context switch
C) swapping
D) job scheduler

Question 18

Which of the following data structure is used to manage the processes in Linux?

A) tree
B) linked list
C) hash map
D) stack

Question 19

The ________ application is the application appearing on the display screen of a mobile device.

A) main
B) background
C) display
D) foreground

Question 20

Which of the following system calls is used to let the parent process create a child process?

A) abort();
B) wait();
C) fork();
D) exec().

Question 21

Explain why Google Chrome uses multiple processes.

Question 22

Explain the fundamental differences between the UNIX fork() and Windows CreateProcess() functions.

Question 23

Which of the following IPC mechanism is easier to implement in a distributed system?

A) shared memory
B) message passing
C) socket communication
D) ordinary pipe

Question 24

Describe two approaches to the binding of client and server ports during RPC calls.

Question 25

Explain the purpose of external data representation (XDR).

Question 26

Assume the shared buffer is implemented as a circular array with two logical pointers: in and out. The variable in points to the next free position in the buffer; out points to the first full position in the buffer. Which of the following is true?

A) The buffer is empty when in == out; the buffer is full when ((in + 1) % BUFFER SIZE) == out;
B) The buffer is full when in == out; the buffer is empty when ((in + 1) % BUFFER SIZE) == out;
C) All the elements of the buffer can be used;
D) Both A and C

Question 27

Explain the term marshalling.

Question 28

Describe how UNIX and Linux manage orphan processes.

Question 29

The difference between a program and a process is that a program is an active entity while a process is a passive entity.

Question 30

Which of the following is true in a Mach operating system?

A) All messages have the same priority.
B) Multiple messages from the same sender are guaranteed an absolute ordering.
C) The sending thread must return immediately if a mailbox is full.
D) It is not designed for distributed systems.

Question 31

Explain the terms "at most once" and "exactly once" and indicate how they relate to remote procedure calls.

Question 32

Child processes inherit UNIX ordinary pipes from their parent process because:

A) The pipe is part of the code and children inherit code from their parents.
B) A pipe is treated as a file descriptor and child processes inherit open file descriptors from their parents.
C) The STARTUPINFO structure establishes this sharing.
D) All IPC facilities are shared between the parent and child processes.

Question 33

Ordinarily the exec() system call follows the fork(). Explain what would happen if a programmer were to inadvertently place the call to exec() before the call to fork().

Question 34

Explain the concept of a context switch.

Question 35

What is a loopback and when is it used?

Question 36

Explain the difference between an I/O-bound process and a CPU-bound process.

Question 37

Which of the following is not a process type in the Chrome browser?

A) Plug-in
B) Renderer
C) Sandbox
D) Browser

Question 38

Explain the main differences between a short-term and long-term scheduler.

Question 39

Name the three types of sockets used in Java and the classes that implement them.

Question 40

Name and describe the different states that a process can exist in at any given time.

Question 41

Background processes are not apparent to users.

Question 42

The iOS mobile operating system only supports a limited form of multitasking.

Question 43

Using a section object to pass messages over a connection port avoids data copying.

Question 44

Ordinary pipes are unidirectional, allowing only one-way communication.

Question 45

Sockets are considered a high-level communications scheme.

Question 46

The exec() system call creates a new process.

Question 47

The Mach operating system treats system calls with message passing.

Question 48

For a single-processor system, there will never be more than one process in the Running state.

Question 49

All access to POSIX shared memory requires a system call.

Question 50

init is the very first process for a typical Linux system.

Question 51

Ordinary pipes in Windows require a parent-child relationship between the communicating processes.

Question 52

All processes in UNIX first translate to a zombie process upon termination.

Question 53

Local Procedure Calls in Windows XP are similar to Remote Procedure Calls.

Question 54

Ordinary pipes in UNIX require a parent-child relationship between the communicating processes.

Question 55

The communication with named pipes requires parent-child relationship.