Top 50+ Python Interview Questions and Answers Latest 2024

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It then computes the product and uses the return statement to return back the answer. All() is another Python function that takes in an iterable and returns True if all of the elements evaluate to True, but returns False if otherwise. The has_key how to become a python developer method returns true if a given key is available in the dictionary; otherwise, it returns false. A decorator is a design pattern in Python that allows a user to add new functionality to an existing object without modifying its structure.

python developer interview questions

Instance, static, and class methods are different types of methods that can be defined in a Python class. The primary distinction between the two is their memory consumption and iteration mechanism in Python 2. With Python 3’s evolution, `xrange` became obsolete, and `range` adopted its characteristics. Understanding this change is crucial for Python developers, especially when working with older codebases or aiming for cross-version compatibility. You must replace `xrange` with `range` when transitioning code from Python 2 to 3.

What is Object-Oriented Programming, and how is it implemented in Python?

Once the duplicates are removed, convert the set back to a list. For example, if you have a list named `my_list`, you can obtain a duplicate-free list with `list(set(my_list))`. To write a Python function that sorts a list of numbers in ascending order, use Python’s built-in `sorted` function. The `max` function iterates over the array to determine the largest element, taking linear time.

It creates a dictionary by merging two sets of data which are in the form of either lists or arrays. In Python, decorators enable users to use the class in the same way (irrespective of the changes made to its attributes or methods). The @property decorator allows a function to be accessed like an attribute. Flask is minimalistic and lightweight, meaning that you add extensions and libraries that you need as you code without automatically being provided with it by the framework. The philosophy behind Flask is that it gives only the components you need to build an app so that you have the flexibility and control.

What are the parameters and arguments?

Optimizing code performance is an essential skill for developers. By asking this question, interviewers want to assess your ability to identify bottlenecks, apply best practices, and implement effective performance improvements in Python scripts. This demonstrates your problem-solving skills and your dedication to delivering efficient, high-quality code that meets the needs of the organization. In this article, we’ll delve into some common Python developer interview questions that you may encounter during your job hunt. Another important aspect is modularizing your code by breaking it down into smaller, reusable functions or classes. This promotes readability and makes it easier to debug and test individual components.

  • We create instances of the Dog and Cat classes and call their speak methods, demonstrating polymorphism.
  • The copy method from the copy module is used for the shallow copy.
  • Store passwords using cryptographic hashing functions like bcrypt or Argon2.
  • Demonstrating your knowledge of this process will show that you have the necessary skills to manage the entire lifecycle of a project and can handle real-world deployment scenarios.
  • For the most part, xrange and range are the exact same in terms of functionality.
  • A decorator is a design pattern in Python that allows a user to add new functionality to an existing object without modifying its structure.

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