Python Institute Python Institute Certifications PCAP-31-03 Questions & Answers

• Question 21:

  What is the expected behavior of the following snippet?

  

  It will:

  A. cause a runtime exception

  B. print 1

  C. print 0 , [1]

  D. print [1J

  Correct Answer: A

  

• Question 22:

  What is the expected output of the following code if there is no file named non existing_file inside the working directory?

  

  A. 2 2

  B. 1 3

  C. 1 2 3

  D. 2 2 3

  Correct Answer: B

• Question 23:

  What is the expected behavior of the following code?

  x - 3 % 1

  y -1 if x > else 0

  print (y)

  A. it outputs -1

  B. the code is erroneous and it will not execute

  C. it outputs 1

  D. it outputs 0

  Correct Answer: D

• Question 24:

  What is the expected behavior of the following snippet?

  

  It will:

  A. cause a runtime exception on line 02

  B. cause a runtime exception on line 01

  C. cause a runtime exception on line 03

  D. print3

  Correct Answer: D

  

• Question 25:

  What is the expected output of the following code?

  

  A. 21

  B. 2

  C. 3

  D. 12

  Correct Answer: A

  

• Question 26:

  A class constructor (Select two answers)

  A. can return a value

  B. cannot be invoked directly from inside the class

  C. can be invoked directly from any of the subclasses

  D. can be invoked directly from any of the superclasses

  Correct Answer: BC

• Question 27:

  The following class definition is given. We want the show () method to invoke the get () method, and then output the value the get () method returns. Which of the invocations should be used instead of XXX?

  

  A. print (get(self))

  B. print (self.get())

  C. print (get())

  D. print (self.get (val))

  Correct Answer: B

• Question 28:

  Assuming that the following piece of code has been executed successfully, which of the expressions evaluate to True? (Choose two.)

  

  A. isinstance (obj_b,A)

  B. A.VarA == 1

  C. obj_a is obj_aa

  D. B.VarA == 1

  Correct Answer: AC

• Question 29:

  What can you deduce from the following statement? (Select two answers) str = open('file.txt', "rt")

  A. str is a string read in from the file named file.txt

  B. a newlina character translation will be performed during the reads

  C. if file. txt does not exist, it will be created

  D. the opened file cannot be written with the use of the str variable

  Correct Answer: AD

• Question 30:

  You are going to read just one character from a stream called s. Which statement would you use?

  A. ch = read(s, 1)

  B. ch = s. input(1)

  C. ch = input(s, 1)

  D. ch = s. read(l)

  Correct Answer: D

  Reference: https://stackoverflow.com/questions/510357/python-read-a-single-character- from-the-user