Output of Python Programs | Set 24 (Dictionary)

Prerequisite : Python-Dictionary

1. What will be the output?

dictionary = {"geek":10, "for":45, "geeks": 90}
print("geek" in dictionary)

Options:

1. 10
2. False
3. True
4. Error

Output:
3. True

Explanation: in is used to check the key exist in dictionary or not.

2. What will be the output?

dictionary ={1:"geek", 2:"for", 3:"geeks"}
del dictionary

Options:

1. del deletes the entire dictionary
2. del doesn’t exist for the dictionary
3. del deletes the keys in the dictionary
4. del deletes the values in the dictionary

Output:
1. del deletes the entire dictionary

Explanation: del deletes the entire dictionary and any further attempt to access it will throw an error.

3. What will be the output?

a = {}
a[1] = 1
a['1'] = 2
a[1]= a[1]+1
count = 0
for i in a:
    count += a[i]
print(count)

Options:

1. 4
2. 2
3. 1
4. Error

Output:
1. 4

Explanation: The above piece of code basically finds the sum of the values of keys.

4. What will be the output?

test = {1:'A', 2:'B', 3:'C'}
del test[1]
test[1] = 'D'
del test[2]
print(len(test))

Options:

1. 2
2. 1
3. 0
4. Error

Output:
1. 2

Explanation: After the key-value pair of 1:’A’ is deleted, the key-value pair of 1:’D’ is added.

5. What will be the output?

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

Options:

1. {‘b’: [2], ‘a’: 1}
2. {‘a’: 1, ‘b’: [2, 3, 4]}
3. {‘b’: [2], ‘a’: [3]}
4. Error

Output:
2. {'a': 1, 'b': [2, 3, 4]}

Explanation: Mutable members can be used as the values of the dictionary but they cannot be used as the keys of the dictionary.