Quiz 10 19FL-IT280-01 - Object Oriented Programming

• Question 1

  4 out of 4 points

  	Few modern computers use threads to represent processes.
  	Answers: True False

• Question 2

  4 out of 4 points

  	What two items must be given to the socket function in order to create a socket object?
  	Answers: a.  The socket port that will be used. b.  The socket type that will be used. c.  The socket family that will be used. d.  The IP address to be used.

• Question 3

  4 out of 4 points

  	The release() method of the Condition class relinquishes the lock, leaving it to be acquired by others.
  	Answers: True False

• Question 4

  4 out of 4 points

  	When developing a network application, the programmer can first try it out on a local host—that is, on a standalone computer that may or may not be connected to the Internet.
  	Answers: True False

• Question 5

  4 out of 4 points

  	What thread method can be used to test if the thread is dead or not?
  	Answers: a.  isActive() b.  isDead() c.  isAlive() d.  isQueued()

• Question 6

  4 out of 4 points

  	You have just captured data using the socket.recv method into a variable named client_data. What can you use to convert client_data to a string?
  	Answers: a.  socket.decode(client_data, type="string") b.  network.data(client_data, %s) c.  codecs.decode(client_data, 'ascii') d.  codecs.decode(client_data, "string")

• Question 7

  4 out of 4 points

  	Which of the following is an example of time slicing?
  	Answers: a.  A process is waiting for input from a user and is moved to the rear of the ready queue. b.  A process is waiting for a condition to become true, and is moved to the rear of the ready queue. c.  A running process is automatically moved to the rear of the ready queue after a few milliseconds of run time. d.  A process is put to sleep as a result of the sleep method, and moves to the rear of the ready queue.

• Question 8

  4 out of 4 points

  	A thread that is waiting for user input is most likely in what state?
  	Answers: a.  A wait state. b.  A time-out state. c.  A blocking state. d.  A sleeping state.

• Question 9

  4 out of 4 points

  	The procedure by which a process's state is saved before being swapped out of the CPU, then us restored to the state when the process is about to execute, is known as?
  	Answers: a.  context switching b.  processing handling c.  priority slicing d.  state cycling

• Question 10

  4 out of 4 points

  	A socket is bound to an address (host, port) by running its bind method.
  	Answers: True False

• Question 11

  4 out of 4 points

  	A program starting another program or a new process is known by what term?
  	Answers: a.  spawning b.  generating c.  cloning d.  forking

• Question 12

  4 out of 4 points

  	In order to execute code in a thread as a process, what must be done?
  	Answers: a.  The thread must be told to execute using the exec=yes key. b.  The thread must include the "process" class as a parent. c.  The thread's class must implement a run method. d.  The thread's class must implement an exec method.

• Question 13

  4 out of 4 points

  	What does the socket module function gethostname() do?
  	Answers: a.  It returns the IP address of the host computer running the Python interpreter. b.  It returns the name of the IP address passed to it. c.  It returns the IP number of the computer whose IP name is passed to the function. d.  It returns the name of the host computer running the Python interpreter.

• Question 14

  4 out of 4 points

  	Because an IDLE itself runs in a thread, it is not generally a good idea to test a multithreaded application in that environment.
  	Answers: True False

• Question 15

  4 out of 4 points

  	A port serves as a channel through which several clients can exchange data with the same server or with different servers.
  	Answers: True False

• Question 16

  4 out of 4 points

  	Time-sharing systems are still in widespread use in the form of Web servers, e-mail servers, print servers, and other kinds of servers on networked systems.
  	Answers: True False

• Question 17

  4 out of 4 points

  	Producer/consumer threads can suffer from synchronization problems.
  	Answers: True False

• Question 18

  4 out of 4 points

  	What is the socket bind method used for?
  	Answers: a.  It binds the socket to a listening pipe. b.  It binds the socket to a port. c.  It binds the socket to the localhost. d.  It binds the socket to a IP address.

• Question 19

  4 out of 4 points

  	In the event that a thread loses access to the CPU, such as via a time-out, sleep, block, or wait state, what happens when the thread is ready to resume execution?
  	Answers: a.  The thread is moved to the rear of the ready-queue. b.  The thread is moved to the front of the ready-queue. c.  The thread is given a random interval to check if it is the thread's turn to execute, or if the processor is available. d.  The thread is given a chance to execute as soon as the running process enters a wait state.

• Question 20

  4 out of 4 points

  	After using the socket.recv method, what type of data is returned?
  	Answers: a.  An object of type bytes. b.  A Boolean value indicating whether the receive was successful. c.  A string containing all data that was received. d.  A list object containing lines of data separated by carriage returns.

• Question 21

  4 out of 4 points

  	What kind of problem occurs in a producer/consumer relationship in which the consumer attempts to access data that are not there, or accesses the same data more than once?
  	Answers: a.  coordination problems b.  synchronization problems c.  procedural problems d.  communication problems

• Question 22

  4 out of 4 points

  	What two thread condition methods can be used to release a lock? (Choose two.)
  	Answers: a.  wait() b.  release() c.  notify() d.  notifyAll()

• Question 23

  4 out of 4 points

  	The discipline of building hardware architectures, operating systems, and specialized algorithms for running a program on a cluster of processors is known by what term?
  	Answers: a.  parallel computing b.  process distributing c.  multi-computing d.  resource sharing

• Question 24

  4 out of 4 points

  	You cannot create and open several sockets on the same port of a host computer.
  	Answers: True False

• Question 25

  4 out of 4 points

  	The most common way to create a thread is to define a class that extends the class threading.Runnable.
  	Answers: True False