PCAP : Certified Associate in Python Programming : Part 06

PCAPga : Certified Associate in Python Programming : Part 06

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

   

   • isinstance (obj_b,A)
   • A.VarA == 1
   • obj_a is obj_aa
   • B.VarA == 1

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

   

   • len(Class.__dict__) == 1
   • ‘data’ in Class.__dict__
   • ‘var’ in Class.__dict__
   • ‘data’ in Object.__dict__

3. A property that stores information about a given class’s super-classes is named:

   • __upper__

   • __super__

   • __ancestors__

   • __bases__

   Explanation:

   Reference: https://www.python-course.eu/python3_inheritance.php

4. Which of the following lines of code will work flawlessly when put independently inside the add_new() method in order to make the snippet’s output equal to [0, 1, 2]? (Choose two.)

   

   • self.queue.append(self.get_last() + 1)
   • self.queue.append(get_last() + 1)
   • self.queue.append(self.queue[-1] + 1)
   • queue.append(self.get_last() + 1)

5. What is the expected output of the following code?

   

   • a
   • c
   • an exception is raised
   • b
   Explanation:
   

   

6. What is the expected output of the following code if there is no file named non_existing_file inside the working directory?

   

   • 1 2 4
   • 1 2 3 4
   • 2 4
   • 1 3

7. What is the expected output of the following code if the file named existing_text_file is a non-zero length text file located inside the working directory?

   

   • the length of the first line from the file
   • -1
   • the number of lines contained inside the file
   • the length of the last line from the file

8. What is the expected behavior of the following code?

   

   • it outputs [1, 3]
   • the code is erroneous and it will not execute
   • it outputs [3, 1]
   • it outputs [4, 2, 0]
   Explanation:
   

   

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

   

   • b() == 4
   • a != b
   • a is not None
   • a() == 4

10. What is the expected output of the following code?

    

    • 3
    • 5
    • 4
    • an exception is raised
    Explanation:
    

    

11. Which of the following lambda definitions are correct? (Choose two.)

    • lambda x,y: (x,y)
    • lambda x,y: return x//y – x%y
    • lambda x,y: x//y – x%y
    • lambda x,y = x//y – x%y

12. Which of the following statements are true? (Choose two.)

    • if invoking open () fails, an exception is raised
    • open () requires a second argument
    • open () is a function which returns an object that represents a physical file
    • instd, outstd. errstd are the names of pre-opened streams

13. What is the expected behavior of the following code?

    

    • the code is erroneous and it will not execute
    • it outputs 1
    • it outputs -1
    • it outputs 0
    Explanation: