PE1 : Python Essentials 1 – Part 1 Summary Test

PE1 : Python Essentials 1 – Part 1 Summary Test

  1. What is the output of the following snippet?

    tup = (1, 2, 4, 8)
tup = tup[-2:-1]
tup = tup[-1]
print(tup)
    • 44
    • 4
    • (4)
    • (4,)

  2. Assuming that my_tuple is a correctly crated tuple, the fact that tuples are immutable means that the following instruction:

    my_tuple[1] = my_tuple[1] + my_tuple[0]
    • may be illegal if the tuple contains strings
    • is illegal 
    • can be executed if and only if the tuple contains at least two elements
    • is full correct

  3. Which of the following lines correctly. invoke the function defined below? (Select two answers)

    def fun(a, b, c=0):
    #Body of the function.
    • fun()
    • fun(0, 1, 2)
    • fun(b=0, a=0)
    • fun(b=1)

  4. The meaning of a positional argument is determined by:

    • its position within the argument list
    • its connection with existing variables
    • its value
    • the argument’s name specified along with its value

  5. What will happen when you attempt to run the following code?

    print(Hello, World)
    • The code will raise the AttributeError exception.
    • The code will raise the systemError exception.
    • The code will raise the ValueError exception.
    • The code will print Hello World to the console.
    • The code will raise the TyepError exception.

  6. The following snippet:

    def func(a, b):
    reeturn b ** a
print(func(b=2, 2))
    • will output 4
    • will output None
    • will output 2
    • is erroneous

  7. The following snippet:

    def function_1(a):
     return None
def function_2(a):
     return function_1(a) * functin_1(a)
print(function_2(2))
    • will output 16
    • will crate a runtime error
    • will output 4
    • will output 2

  8. What is the output of the following snippet?

    def fun(x):
    if c % 2 == 0:
       return 1
    else:
       return 2
print(fun(fun(2)))
    • 2None
    • 1
    • the code will cause a runtime error
    • 2

  9. What is the output of the following piece of code?

    print("a", "b", "c", sep="sep")
    • a b c
    • abc
    • asepbsepcsep
    • asepbsepc

  10. Which of the following sentences are true about the code? (Select two answers)

    nums = [1, 2, 3]
vals = nums
    • nums and vals are different names of the same list 
    • vals is longer tha nums
    • nums and vals are different lists
    • nums has the same length as vals

  11. What is the output of the following snippet?

    my_list = [1, 2]
for v in range(2):
    my_list.insert(-1, my_list[v])
print(my_list)
    • [1, 2, 2, 2]
    • [1, 2, 1, 2]
    • [2, 1, 1, 2]
    • [1, 1, 1, 2]

  12. What is the output of the following snippet?

    dct = {}
dct['1'] = (1, 2)
dct['2'] = (2, 1)
for x in dct.keys():
     print(dct[x][1], end="")
    • 21
    • (2,1)
    • 12
    • (1,2)

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

    x = 1 // 5 + 1 / 5
print(x)
    • 0.0
    • 0
    • 0.4
    • 0.2

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

    x = 1
y = 2
x, y z = x, x, y
z, y, z = x, y, z
print(x, y, z)
    • 2 1 2
    • 1 2 2
    • 1 1 2
    • 1 2 1

  15. The result of the following division:

    1 // 2
    • is equal to 0.5
    • is equal to 0
    • is equal to 0.0
    • cannot be predicted

  16. What is the output of the following snippet?

    def fun(inp =2, out =3):
    return inp * out
print(fun(out =2))
    • 4
    • 6
    • 2
    • the snippet is erroneous and will cause SyntaxError

  17. What is the expected behavior of the following program?

    foo = (1, 2, 3)
foo.index(0)
    • The program will cause a ValueError exception.
    • The program will output 1 to the screen.
    • The program will cause a SyntaxError exception.
    • The program will cause a TypeError exception.
    • The program will cause an AttributeError exception.

  18. What is the output of the following snippet?

    def fun(x, y):
    if x == y:
       return x
    else: 
       return fun(x, y-1)
print(fun(0,3))
    • 1
    • 2
    • the snippet will cause a runtime error 
    • 0

  19. How many element does the lst list contain?

    lst = [i for i in range(-1, -2)]
    • two
    • three
    • zero
    • one

  20. What is the output of the following piece of code if the user enters two lines containing 2 and 4 respectively?

    x = float(input())
y = float(input())
print(y **(1 / x))
    • 4.0
    • 2.0
    • 0.0
    • 1.0

  21. What is the output of the following code if the user enters a 0 ?

    try:
    value = input("Enter a value: ")
    print(int(value) / len(value))
except ValueError:
    print("Bad input...")
except ZeroDivisionError:
    print("Very bad input...")
except TypeErrorq:
    print("Very very bad input...")
except:
    print("Booo!")
    • Very bad input...
    • Very very bad input...
    • Bad input...
    • Booo!
    • 0.0
    • 1.0

  22. What is the output of the following snippet?

    dct = {'one': 'two', 'three': 'one', 'two': 'three'}
v = dct['three']
for k in range(len(dct)):
    v = dct[v]
print(v)
    • two
    • ('one', 'two', 'three')
    • three
    • one

  23. What value will be assignment to the x variable?

    z = 0
y = 0
x = y < z and z > y or y > z and z < y
    • False
    • 0
    • 1
    • True

  24. What is the output of the following piece of the code if the user enter two lines containing 3 and 6 respectively? 

    y = input()
x = input()
print(x + y)
    • 36
    • 3
    • 63
    • 6

  25. Which of the following variable names are illegal and will cause the SystemError exception? (Select two answers)

    • print
    • in 
    • for
    • in

  26. What is the expected behavior of the following program?

    try:
   print(5/0)
   break:
except:
   print("Sorry, something went wrong...")
except(ValueError, ZeroDivisionError):
   print("Too bad...")
    • The program will cause a ValueError exception and output the following message Too bad...
    • The program will cause a SyntaxError exception
    • The program will cause a ValueError exception and output a default error message.
    • The program will raise an exception handle by the first except block.
    • The program will cause a ZeroDivisionError exception and output the following message: Too bad...
    • The program will cause a ZeroDivisionError exception and output a default error message.

  27. Take a look at the snippet and choose the true statement:

    nums = [1, 2, 3]
vals = nums
del vals[:]
    • the snippet will cause a runtime error 
    • vals is longer than nums
    • nums is longer than vals
    • nums and vals have the same length 

  28. What is the output of the following snippet?

    my_list = [x * x for x in range (5)]
def fun(lst):
    del lst[lst[2]]
    return lst
print(fun(my_list))
    • [0 , 1, 4, 9]
    • [0, 1, 4, 16]
    • [0, 1, 9, 16]
    • [1, 4, 9,  16]

  29. What is the output of the following snippet?

    dd = {"1": "0", "0": "1"}
for x in dd.vals():
    print(x, end="")
    • 0 1
    • 1 0
    • 0 0
    • the code is erroneous(the dict object has no vals() method) 

  30. What is the output of the following piece of code if the user enters two lines containing 3 and 2 respectively?

    x = int(input())
y = int(input())
x = x % y
y = y % x
print(y)
    • 1
    • 3
    • 2
    • 0

  31. Which if the following snippets shows the correct way of handing multiple excepting in a single except clause?

    • except TypeError, ValueError, ZeroDivisinError:
      # Some code.
    • except: (TypeError, ValueError, ZeroDivisinError)
      # Some code.
    • except TypeError, ValueError, ZeroDivisinError
      # Some code.
    • except: TypeError, ValueError, ZeroDivisinError
      # Some code.
    • except: (TypeError, ValueError, ZeroDivisinError):
      # Some code.
    • except (TypeError, ValueError, ZeroDivisinError)
      # Some code.

  32. An operator able to check  two values are not equal is code as:

    • =/=
    • !=
    • <>
    • not ==

  33. What will be the output of the following snippet?

    a = 1
b = 0
a = a ^ b
b = a ^ b
a = a ^ b
print (a, b)
    • 1 1
    • 0 0
    • 1 0
    • 0 1

  34. How many stars (*) will the following snippet send to the console?

    i  =0 
while i < i + 2 :  
    i += 1   
    print("*")
else:   
    print("*")
    • zero
    • the snippet will enter an infinite loop, printing one star per line
    • one
    • two

  35. How many hashes (*) will the following snippet sent to the console?

    lst = [[x for x in range(3)] for y in range(3)]
for r in range(3):
    for c in rang(3):
       if lst[r][c] % 2 != 0:
         print("#")
    • nine
    • zero
    • three
    • six
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