Python Questions and Answers – Dictionary – 4

This set of Python Multiple Choice Questions & Answers (MCQs) focuses on “Dictionary – 4”.

1. The following Python code is invalid.

class demo(dict):
  def __test__(self,key):
    return []
a = demo()
a['test'] = 7
print(a)

a) True
b) False
View Answer

2. What will be the output of the following Python code?

count={}
count[(1,2,4)] = 5
count[(4,2,1)] = 7
count[(1,2)] = 6
count[(4,2,1)] = 2
tot = 0
for i in count:
    tot=tot+count[i]
print(len(count)+tot)

a) 25
b) 17
c) 16
d) Tuples can’t be made keys of a dictionary
View Answer

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

a={}
a[2]=1
a[1]=[2,3,4]
print(a[1][1])

a) [2,3,4]
b) 3
c) 2
d) An exception is thrown
View Answer

4. What will be the output of the following Python code?

>>> a={'B':5,'A':9,'C':7}
>>> sorted(a)

a) [‘A’,’B’,’C’]
b) [‘B’,’C’,’A’]
c) [5,7,9]
d) [9,5,7]
View Answer

5. What will be the output of the following Python code?

>>> a={i: i*i for i in range(6)}
>>> a

a) Dictionary comprehension doesn’t exist
b) {0: 0, 1: 1, 2: 4, 3: 9, 4: 16, 5: 25, 6:36}
c) {0: 0, 1: 1, 4: 4, 9: 9, 16: 16, 25: 25}
d) {0: 0, 1: 1, 2: 4, 3: 9, 4: 16, 5: 25}
View Answer

6. What will be the output of the following Python code?

>>> a={}
>>> a.fromkeys([1,2,3],"check")

a) Syntax error
b) {1:”check”,2:”check”,3:”check”}
c) “check”
d) {1:None,2:None,3:None}
View Answer

7. What will be the output of the following Python code?

>>> b={}
>>> all(b)

a) { }
b) False
c) True
d) An exception is thrown
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8. If b is a dictionary, what does any(b) do?
a) Returns True if any key of the dictionary is true
b) Returns False if any key of the dictionary is false
c) Returns True if all keys of the dictionary are true
d) Method any() doesn’t exist for dictionary
View Answer

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

>>> a={"a":1,"b":2,"c":3}
>>> b=dict(zip(a.values(),a.keys()))
>>> b

a) {‘a’: 1, ‘b’: 2, ‘c’: 3}
b) An exception is thrown
c) {‘a’: ‘b’: ‘c’: }
d) {1: ‘a’, 2: ‘b’, 3: ‘c’}
View Answer

10. What will be the output of the following Python code?

>>> a={i: 'A' + str(i) for i in range(5)}
>>> a

a) An exception is thrown
b) {0: ‘A0’, 1: ‘A1’, 2: ‘A2’, 3: ‘A3’, 4: ‘A4’}
c) {0: ‘A’, 1: ‘A’, 2: ‘A’, 3: ‘A’, 4: ‘A’}
d) {0: ‘0’, 1: ‘1’, 2: ‘2’, 3: ‘3’, 4: ‘4’}
View Answer

11. What will be the output of the following Python code?

>>> a=dict()
>>> a[1]

a) An exception is thrown since the dictionary is empty
b) ‘ ‘
c) 1
d) 0
View Answer

12. What will be the output of the following Python code?

>>> import collections
>>> a=dict()
>>> a=collections.defaultdict(int)
>>> a[1]

a) 1
b) 0
c) An exception is thrown
d) ‘ ‘
View Answer

13. What will be the output of the following Python code?

>>> import collections
>>> a=dict()
>>> a=collections.defaultdict(str)
>>> a['A']

a) An exception is thrown since the dictionary is empty
b) ‘ ‘
c) ‘A’
d) 0
View Answer

14. What will be the output of the following Python code?

>>> import collections
>>> b=dict()
>>> b=collections.defaultdict(lambda: 7)
>>> b[4]

a) 4
b) 0
c) An exception is thrown
d) 7
View Answer

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

>>> import collections
>>> a=collections.OrderedDict((str(x),x) for x in range(3))
>>> a

a) {‘2’:2, ‘0’:0, ‘1’:1}
b) OrderedDict([(‘0’, 0), (‘1’, 1), (‘2’, 2)])
c) An exception is thrown
d) ‘ ‘
View Answer

Sanfoundry Global Education & Learning Series – Python.

To practice all areas of Python, here is complete set of 1000+ Multiple Choice Questions and Answers.