Real interview questions from top companies for Python developer. Includes theoretical concepts and coding problems.
What is the difference between static typing and dynamic typing?
Static typing is a type system where the data type of a variable is known at compile time, whereas dynamic typing is a type system where the data type of a variable is determined at runtime.
What are the advantages of using Python?
The advantages of using Python include its simplicity, readability, and ease of use, making it a great language for beginners and experienced developers alike. It also has a vast number of libraries and frameworks that make it suitable for a wide range of applications.
What is the purpose of the 'self' parameter in Python classes?
The 'self' parameter in Python classes is a reference to the current instance of the class and is used to access variables and methods from the class.
What is the difference between 'is' and '==' operators in Python?
The 'is' operator checks if both variables point to the same object in memory, whereas the '==' operator checks if the values of both variables are equal.
What is the purpose of the 'try-except' block in Python?
The 'try-except' block in Python is used for exception handling, where the 'try' block contains the code that might raise an exception, and the 'except' block contains the code that will be executed if an exception is raised.
What is the difference between a list and a tuple in Python?
A list in Python is a mutable collection of items, whereas a tuple is an immutable collection of items.
What is the purpose of the 'join()' function in Python?
The 'join()' function in Python is used to concatenate a list of strings into a single string.
What is the difference between 'break' and 'continue' statements in Python?
The 'break' statement in Python is used to terminate a loop, whereas the 'continue' statement is used to skip the rest of the code in the current iteration and move on to the next iteration.
What is the purpose of the 'enumerate()' function in Python?
The 'enumerate()' function in Python is used to loop over a list and have an automatic counter/index along with it.
What is the difference between a dictionary and a set in Python?
A dictionary in Python is an unordered collection of key-value pairs, whereas a set is an unordered collection of unique items.
What is the purpose of the 'zip()' function in Python?
The 'zip()' function in Python is used to iterate over two or more lists in parallel.
What is the difference between 'deepcopy()' and 'copy()' functions in Python?
The 'deepcopy()' function in Python creates a new, independent copy of an object, whereas the 'copy()' function creates a shallow copy, which means it only copies the reference to the original object.
What is the purpose of the 'any()' and 'all()' functions in Python?
The 'any()' function in Python returns True if at least one element in an iterable is true, whereas the 'all()' function returns True if all elements in an iterable are true.
What is the difference between a generator and an iterator in Python?
A generator in Python is a special type of iterator that can be used to generate a sequence of results, whereas an iterator is an object that allows a programmer to traverse through all the elements in a data structure.
What is the purpose of the 'map()' function in Python?
The 'map()' function in Python is used to apply a given function to each item of an iterable and returns a list of the results.
What is the difference between 'filter()' and 'reduce()' functions in Python?
The 'filter()' function in Python is used to construct an iterator from elements of an iterable for which a function returns True, whereas the 'reduce()' function is used to apply a rolling computation to sequential pairs of values in a list.
What is the purpose of the 'lambda()' function in Python?
The 'lambda()' function in Python is used to create small, anonymous functions.
What is the difference between 'global' and 'nonlocal' keywords in Python?
The 'global' keyword in Python is used to declare that a variable is global, whereas the 'nonlocal' keyword is used to declare that a variable is not local, but it is not necessarily global.
What is the purpose of the 'with' statement in Python?
The 'with' statement in Python is used to manage resources, such as files, that need to be cleaned up after use.
What is the difference between 'classmethod' and 'staticmethod' in Python?
A 'classmethod' in Python is a method that is bound to the class and not the instance of the class, whereas a 'staticmethod' is a method that belongs to a class, rather than an instance of the class.
What is the purpose of the 'property()' function in Python?
The 'property()' function in Python is used to implement getters, setters, and deleters for instance attributes.
What is the difference between 'super()' and 'self' in Python?
The 'super()' function in Python is used to give access to methods and properties of a parent or sibling class, whereas 'self' is a reference to the current instance of the class.
What is the purpose of the 'del' statement in Python?
The 'del' statement in Python is used to delete the reference to an object.
Write a Python function to find the maximum of two numbers.
deffind_max(a, b): return a if a > b else b
Write a Python function to find the minimum of two numbers.
deffind_min(a, b): return a if a < b else b
Write a Python function to find the sum of all elements in a list.
deffind_sum(lst): returnsum(lst)
Write a Python function to find the product of all elements in a list.
deffind_product(lst): product = 1;
for num in lst: product *= num;
return product
Write a Python function to find the average of all elements in a list.
deffind_average(lst): returnsum(lst) / len(lst)
Write a Python function to find the maximum value in a list.
deffind_max_value(lst): returnmax(lst)
Write a Python function to find the minimum value in a list.
deffind_min_value(lst): returnmin(lst)
Write a Python function to find the index of the first occurrence of a specified value in a list.
