1. Which of the following is a Python tuple?
a) [1, 2, 3]
b) (1, 2, 3)
c) {1, 2, 3}
d) {}
Discussion
Explanation: Tuples are represented with round brackets.
2. Suppose t = (1, 2, 4, 3), which of the following is incorrect?
a) print(t[3])
b) t[3] = 45
c) print(max(t))
d) print(len(t))
Discussion
Explanation: Values cannot be modified in the case of tuple, that is, tuple is immutable.
3. What will be the output of the following Python code?
>>>t=(1,2,4,3)
>>>t[1:3]
a) (1, 2)
b) (1, 2, 4)
c) (2, 4)
d) (2, 4, 3)
Discussion
Explanation: Slicing in tuples takes place just as it does in strings.
4. What will be the output of the following Python code?
>>>t=(1,2,4,3)
>>>t[1:-1]
a) (1, 2)
b) (1, 2, 4)
c) (2, 4)
d) (2, 4, 3)
Discussion
Explanation: Slicing in tuples takes place just as it does in strings.
5. What will be the output of the following Python code?
>>>t = (1, 2, 4, 3, 8, 9)
>>>[t[i] for i in range(0, len(t), 2)]
a) [2, 3, 9]
b) [1, 2, 4, 3, 8, 9]
c) [1, 4, 8]
d) (1, 4, 8)
Discussion
Explanation: [1, 4, 8]
6. What will be the output of the following Python code?
d = {"john":40, "peter":45}
d["john"]
a) 40
b) 45
c) “john”
d) “peter”
Discussion
7. What will be the output of the following Python code?
>>>t = (1, 2)
>>>2 * t
a) (1, 2, 1, 2)
b) [1, 2, 1, 2]
c) (1, 1, 2, 2)
d) [1, 1, 2, 2]
Discussion
Explanation: * operator concatenates tuple.
8. What will be the output of the following Python code?
>>>t1 = (1, 2, 4, 3)
>>>t2 = (1, 2, 3, 4)
>>>t1 < t2
a) true
b) false
c) error
d) none
Discussion
Explanation: Elements are compared one by one in this case.
9. What will be the output of the following Python code?
>>>my_tuple = (1, 2, 3, 4)
>>>my_tuple.append( (5, 6, 7) )
>>>print len(my_tuple)
a) 1
b) 2
c) 5
d) Error
Discussion
Explanation: Tuples are immutable and don’t have an append method. An exception is thrown in this case.
10. What will be the output of the following Python code?
numberGames = {}
numberGames[(1,2,4)] = 8
numberGames[(4,2,1)] = 10
numberGames[(1,2)] = 12
sum = 0
for k in numberGames:
sum += numberGames[k]
print len(numberGames) + sum
a) 30
b) 24
c) 33
d) 12
Discussion
Explanation: Tuples can be used for keys into dictionary. The tuples can have mixed length and the order of the items in the tuple is considered when comparing the equality of the keys.