Page 1 - Home Assignment - DICTIONARY

Home Assignment

Computer Science

Class – XI

Topic: DICTIONARY

1. Dictionary is an unordered set of elements. Explain.

2. _____________ must be unique and immutable within a dictionary.
3. Internally dictionaries are stored as ______________.

4. Based on the definition of following two dictionaries answer the following questions:

D1 = {1: 'SUN', 2: 'MON', 3: 'TUE', 4: 'WED', 5: 'THU', 6: 'FRI', 7: 'SAT'}
D2 = {'V': 'VIOLET', 'I': 'INDIGO', 'B': 'BLUE', 'G': 'GREEN', 'Y': 'YELLOW', 'O': ORANGE', 'R': 'RED'}

a) print(D1[3])
b) print(D1[-3])
c) print(D2['Y'])
d) print(dict())
e) print('B' in D2)
f) print(5 not in D1)
g) D1.get(8)
h) D2.get('O')

i) D1.items()
j) D1.keys()
k) D2.values()
l) print(dict.fromkeys([2,4,6], 'EVEN'))
m) X={1:10,2:20,3:30}
Y={2:200,4:400}
X.update(Y)
print(X)
print(Y)
n) D1['W']='WEEKDAYS'
print(len(D1))

5. Differentiate creating a copy of dictionary through = operator to a copy of the same with
copy() function.

6. Differentiate pop() and popitem(). Explain through an example.