Top Python Interview Questions

> List are mutable (editable) while Tuple is immutable which can’t be edited.
> Lists are slower when compared with Tuples.
> List can have multiple data type in the single list where it can’t happen while using a tuple.
> Syntax: list = [1,’python’, 2.0] Syntax: tuple = [1, 2, 3]

Dictionary is one of the built-in datatype in python which is represented with key and corresponding values to it. These are indexed based on keys.
Example: Dict = {‘Name’: ‘Arjun’, ‘Age’: 21, ‘School’: ‘KVS’}
print (Dict [Name]) >O/P: Arjun
print (Dict [Age]) >O/P: 21
print (Dict [School’]) >O/P: KVS
In the above example Name, Age and School are Keys whereas the O/P are the corresponding values assigned to that keys.

As Python follows an object-oriented programming paradigm, classes in Python have the ability to inherit the properties of another class. This process is known as inheritance. Inheritance provides the code reusability feature. The class that is being inherited is called a superclass and the class that inherits the superclass is called a derived or child class.
Following types of inheritance are supported in Python:
> Single inheritance: When a class inherits only one superclass
> Multiple inheritance: When a class inherits multiple superclasses
> Multilevel inheritance: When a class inherits a superclass and then another class inherits this derived class forming a ‘parent, child, and grandchild’ class structure
> Hierarchical inheritance: When one superclass is inherited by multiple derived classes

with open(A_LARGE_FILE) as countletter:
count = 0
text = countletter.read()
for character in text:
if character.isupper():
count += 1