# Python Data Type

• Last Updated : 26 Oct, 2020

 Question 1
Which of these is not a core data type?
 A Lists B Dictionary C Tuples D Class
Python Data Type
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Question 1 Explanation:
Class is a user defined data type
 Question 2
What data type is the object below ? L = [1, 23, ‘hello’, 1]
 A List B Dictionary C Tuple D Array
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Question 2 Explanation:
[ ] defines a list
 Question 3
Which of the following function convert a string to a float in python?
 A int(x [,base]) B long(x [,base] ) C float(x) D str(x)
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Question 3 Explanation:
float(x) − Converts x to a floating-point number
 Question 4
Which of the following statement(s) is TRUE?
1. A hash function takes a message of arbitrary length and generates a fixed length code.
2. A hash function takes a message of fixed length and generates a code of variable length.
3. A hash function may give the same hash value for distinct messages.

 A I only B II and III only C I and III only D II only
Hash    GATE IT 2006    Python Data Type
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Question 4 Explanation:
Hash function is defined as any function that can be used to map data of arbitrary size of data to a fixed size data.. The values returned by a hash function are called hash values, hash codes, digests, or simply hashes  :  Statement 1 is correct Yes, it is possible that a Hash Function maps a value to a same location in the memmory that's why collision occurs and we have different technique to handle  this problem : Statement 3 is coorect. eg : we have hash function, h(x) = x mod 3 Acc to Statement 1, no matter what the value of 'x' is h(x) results in a fixed mapping location. Acc. to Statement 3, h(x) can result in same mapping mapping location for different value of 'x' e.g. if x = 4 or x = 7 , h(x) = 1 in both the cases, although collision occurs.   This solution is contributed by Mohit Gupta.
 Question 5
Question 1: Find the output of the following program:
```nameList = ['Harsh', 'Pratik', 'Bob', 'Dhruv']

pos = nameList.index("GeeksforGeeks")

print (pos * 3)

```
 A GeeksforGeeks GeeksforGeeks GeeksforGeeks B Harsh C Harsh Harsh Harsh D ValueError: 'GeeksforGeeks' is not in list
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Question 5 Explanation:
The task of the index is to find the position of a supplied value in a given list. In the above program the supplied value is “GeeksforGeeks” and the list is nameList. As GeeksforGeeks is not present in the list, an exception is thrown.
 Question 6
Question 1: Find the output of the following program:
```nameList = ['Harsh', 'Pratik', 'Bob', 'Dhruv']

pos = nameList.index("GeeksforGeeks")

print (pos * 3)

```
 A GeeksforGeeks GeeksforGeeks GeeksforGeeks B Harsh C Harsh Harsh Harsh D ValueError: 'GeeksforGeeks' is not in list
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Question 6 Explanation:
The task of the index is to find the position of a supplied value in a given list. In the above program the supplied value is “GeeksforGeeks” and the list is nameList. As GeeksforGeeks is not present in the list, an exception is thrown.
 Question 7
Question 1:Find the output of the following program:
```D = dict()
for x in enumerate(range(2)):
D[x] = x
D[x+7] = x
print(D)

```
 A {0: 1, 7: 0, 1: 1, 8: 0} B {1: 1, 7: 2, 0: 1, 8: 1} C {0: 0, 7: 0, 1: 1, 8: 1} D KeyError
Python Data Type    Python Dictionary Quiz
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Question 7 Explanation:
enumerate() will return a tuple, the loop will have x = (0, 0), (1, 1). Thus D = 0, D = 1, D[0 + 7] = D = 0 and D[1 + 7] = D = 1. Note: Dictionary is unordered, so the sequence of the key-value pair may differ in each output.
 Question 8
Question 6:Find the output of the following program:
```a = {i: i * i for i in range(6)}
print (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}
Python Data Type    Python Dictionary Quiz
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Question 8 Explanation:
The above piece of code written in curly braces generate the whole Dictionary.
There are 7 questions to complete.
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