PE2 : Python Essentials 2 – Module 4 Test

PE2 : Python Essentials 2 – Module 4 Test

1. Which of the following open modes allow you to perform read operations? (Select two answers)

   • r
   • a
   • r+
   • w

2. What is the expected result of executing the code?

   def I():
          s = 'abcdef'
          for c in s[::2]:
                  yield c
   
   for x in I():
            print(x, end=' ')

   • It will print abcdef
   • It will print an empty line
   • It will print bdf
   • It will print ace

3. What keyword would you us to define an anonymous function?

   • afun
   • lambda
   • def
   • yield

4. Select the true statements. (Select two answers)

   • The lambda function can accept a maximum of two arguments
   • The lambda function can evaluate multiple expressions
   • The lambda function can evaluate only one expressrion
   • The lambda function can accept any number of arguments

5. Look at the code below:

   my_list = [1, 2, 3]
   # insert line of code here.
   print(foo)

   Which snippet would you insert in order for the program to output the following  result (tuple):

   1, 4, 27

   • foo = list(map(lambda x: x**x, my_list))
   • foo = tuple(map(lambda x: x*x, my_list))
   • foo = list(map(lambda x: x*x, my_list))
   • foo = tuple(map(lambda x: x**x, my_list))

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

   from datetime import date
   date_1 = date(1992, 1, 16)
   date_2 = date(1992, 2, 5)
   print(date_1 - date_2)

   • 345
   • 345 days
   • 345, 0:00:00
   • 345 days, 0:00:00

7. Which program will produce the following output:

   Mo Tu We Th Fr Sa Su

   • import calendar
     print(calendar.weekheader(3))

   • import calendar
     print(calendar.weekheader(2))

   • import calendar
     print(calendar.week)

   • import calendar
     print(calendar.weekheader())

8. What is the expected result of executed the following code?

   def o(p):
      def q():
         return'*' *p
      return q
   r = o(1)
   s = o(2)
   print(r9) + s())

   • it will print ***
   • it will print ***
   • it will print **
   • it will print *

9. Look at the code below:

   my_tuple = (0, 1, 2. 3, 4, 5, 6)
   # Insert line of code here.
   print(foo)

   Which snippet would you insert in order for he program  to output the following result (list):

   [2, 3, 4, 5, 6]

   • foo = list(filter(lambda x: x-0 and x-1, my_tuple))

   • foo  - list(filter(lambda x: x==0 and x==1, my_tuple))

   • foo = tuple(filter(lambda x: x>1, my_tuple))

   • foo = tuple(filter(lambda x: x-0 and x-1, my_tuple))

10. What is the expected result of executed the following code?

    def fun(n):
       s = '+'
       for i in range(n):
         s += s
         yield s
    for x in fun(2):
        print(x, end='')

    • It will print+++
    • It will print ++
    • It will print ++++++
    • It will print +

11. What is the meaning of the value represented by errno.EEXITS ?

    • File doesn’t exist
    • Bad file number
    • Permission denied
    • File exists

12. What is the expected result of the following code?

    b = bytearray(3)
    print(b)

    • 3
    • bytearray(b'\x00\x00\x00')
    • bytearray(0, 0, 0)
    • bytearray(b'3')

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

    from datetime import datetime
    datetime = datetime(2019, 11, 27, 11, 27, 22)
    perint(datetime.strftime('%y/%B/%d %H:%M:%s'))

    • 19/November/27 11:27:22
    • 2019/Nov/27 11:27:22
    • 2019/11/27 11:27:22
    • 19/11/27 11:27:22

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

    import os 
    os.mkdir('pictures')
    os.chdir('pictures')
    os.mkdir('thumbnails')
    os.chdir('thumbnails')
    os.mkdir('tmp')
    os.chdir('../')
    print(os.getcwd())

    • The orint to the thumbnails directory
    • The path to the  pitcures directory 
    • The path to the tmp directory 
    • The path to th root directory

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

    import os
    os.mkdir('thumbnails')
    os.chdir('thumbnails')
    sizes = ['small', 'medium', 'large']
    for size in sizes:
        os.mkdir(size)
    print(os.listdir())

    • ['.', '..', 'large', 'small', 'medium']
    • []
    • ['.', 'large', 'small', 'medium']
    • ['large', 'small', 'medium']

16. What is the expected result of the following code?

    import calendar
    c = calendar.Calendar()
    for weekday in c.iterweekdays():
        print(weekday, end="")

    • 1 2 3 4 5 6 7
    • Su Mo Tu We Th Fr Sa
    • 0 1 2 3 4 5 6 7
    • Mo Tu We Th Fr Sa Su