PE2 : Python Essentials 2 – Module 3 Test

PE2 : Python Essentials 2 – Module 3 Test

PE2 : Python Essentials 2 – Module 3 Test

  1. What will be the result of executing the following code?

    class Ex(Exception):
     def_init_(self,msg):
            Exception._init_(self,msg + msg)
            self.args = (msg,)

try:
       raise Ex('ex')
except Ex as e:
       print(e)
except Exception as e:
       print(e)
    • it will print ex
    • it will print exex
    • it will print an empty line
    • it will raise an unhandled exception

  2. A data structure described as LIFO is actually a:

    • list 
    • stack
    • heap
    • tree

  3. What will be the output of the following code?

    class A:
    A = 1

print(hasattr(A, 'A'))
    • 0
    • False
    • 1
    • True

  4. What will be the effect of running the following code?

    class A:
    def_init_(self,v):
        self._a = v + 1

a = A(0)
print(a._a)
    • 2
    • The code will raise an AttributeError exception
    • 0
    • 1

  5. What will be the result of executing the following code?

    class A:
    pass

class B(A):
    pass

class C(B):
     pass

print(issubclass(C,A))
    • it will print 1
    • it will print False
    • it will print True
    • it will raise an exception

  6. What will be the result of executing the following code?

    class A:
    def_str_(self):
        return 'a'

class B:
    def_str_(self):
        return 'b'

class C(A, B):
     pass

o = C()
print(o)
    • it will print b
    • it will print c
    • it will print a
    • it will raise an exception

  7. What will be the result of executing the following code?

    class A:
    def a(self):
        print('a')

class B:
    def a(self):
        self.a()


o = C()
o.c()
    • it will raise an exception
    • it will print a
    • it will print c
    • it will print b

  8. What will be the result of executing the following code?

    try:
   raise Exception(1,2,3)
except Exception as e:
   print (len(e.args))
    • it will print 1
    • it will print 2
    • it will raise as unhandled exception
    • it will print 3

  9. What will be the output of the following code?

    class A:
   X = 0
   def __init__(self,v = 0):
       self.Y = v
       A.X += v
a = A()
b = A(1)
c = A(2)
print(c.X)
    • 2
    • 3
    • 0
    • 1

  10. If the class’s constructor is declared as below, which one of  the assignments is valid?

    class Class:
     def __init__(self):
         pass
    • object = Class
    • object = Class()
    • object = Class(self)
    • object = Class(object)

  11. What will be the result of executing the following code?

    def f(x):
    try:
        x = x / x
     except:
        print("a",end='')
     else:
        print("b",end='')
     finally:
        print("c",end='')
f(1)
f(0)
    • it will raise an unhandled exception
    • it will print bcac 
    • it will print acac
    • it will print bcbc 

  12. If there is a superclass named A and a subclass named B, which one of the presented invocations should you put instead of the comment?

    class A:
     def __init__(self):
        self.a = 1
class B(A):
     def __init__(self):
         # put selected line here.
         self.b = 2
    • A.__init__(self)
    • __init__()
    • A.__init__()
    • A.__init__(1)

  13. What will be the result of executing the following code?

    class A:
     def__init__(self):
         pass
a = A(1)
print(hasattr(a,'A'))
    • 1
    • False
    • it will raise an exception
    • True

  14. What will be the result of executing the following code?

    class A:
​​​​     def__init__(self):
          return 'a'
class B(A):
      def__init__(self):
           return 'b'
class c(B):
      pass
o = C()
print(o)
    • it will print c 
    • it will print b
    • it will print a 
    • it will raise an exception

  15. What will be the output of the following code?

    class A:
     def__init__(self,v = 1):
         self.v =v
     def set(self,v):
         self.v = v
         return v
a = A()
print(a.set(a.v + 1))
    • 2
    • 1
    • 3
    • 0

  16. What will be the result of executing the following code?

    class A:
      v = 2
class B(A):
      v = 1
class C(B):
      pass
o =C()
print(o.v)
    • it will raise an exception 
    • it will print 2
    • it will print an empty line
    • it will print 1