Python dictionary-Python interview questions on dictionaries

Python Interview questions - dictionaries

(Python version 3.9 or later version)

Which of the following can be used as a dictionary key?

set

list

complex

dict

Which of the following about dictionary keys is NOT correct?

All keys in a dictionary must be unique

Some built-in methods can be used as keys

Strings of any length can be used as keys

None cannot be used as a key

Which of the following will NOT create an empty dictionary?

dict1 = { }

dict1 = dict ( )

dict1 = {'': ''}

dict1 = dict.__new__(dict, (), {})

What would be the result of executing the following code?

f={'Fr':33,'Br':55,'UK':44}
sorted(f)

['Br', 55, 'Fr', 33, 'UK', 44]

['Fr', 33, 'UK', 44, 'Br', 55]

[33, 44, 55]

['Br', 'Fr', 'UK']

Two dictionaries, d1 and d2, were created as shown below:

d1 = {'p':1, 'q':2}
d2 = {'q':3, 'r':4}

Which of the following code snippet(s) would merge d1 and d2 into a new dictionary, d3, that will have {'q': 2, 'r': 4, 'p': 1} as its data

d3 = d2 | d1

d3 = {**d2, **d1}

d3 = d2.copy(); d3.update(d1)

All of the above

Which line of code should replace # Replace this line in the following code snippet to get the result:
P-y-t-h-o-n!

w = 'Python'
d = {'sep':'-', 'end':'!'}
# Replace this line

print(w, d)

print(*w, *d)

print(*w, **d)

print(**w, **d)

What would be the output of executing the following code?

d, e, f = {},dict(),dict(())
d['a'] = 1.0; 
d['b'] = 2.0; 
d['c'] = 3.0
e = dict([('b',2/1), 
	 ('c',3/1),
	 ('a', 1/1)])
f = dict(zip(['c','a','b'], 
	      [3, 1, 2]))
print(d==e and e==f and d==f)

True

False

Type Error

Syntax Error

Which of the following dictionary methods can extract key:value pairs from a dictionary?

pairs()

items()

values()

data()

Which of the following is the difference between a dictionary (dict) and a list?

list is a sequence of objects while dict is an unordered key:value pair(s)

list is immutable while dict is mutable

list cannot have duplicate members while dict can

list cannot have functions as members while dict can

Which line of code should replace # Replace this line in the following code snippet to get 3 as the output to show the count of key:value pairs in dictionary t

t={'Fr':33,'Br':55,'UK':44}
# Replace this line

items(t)

pairs(t)

count(t)

len(t)