20+ Python Fullstack Developer Interview Questions and Answers

ArrayList is a resizable array implementation, while LinkedList is a doubly linked list implementation in Python.

• ArrayList uses contiguous memory allocation, while LinkedList uses non-contiguous memory allocation.

• ArrayList provides fast access to elements using index, while LinkedList provides fast insertion and deletion of elements.

• ArrayList is better for storing and accessing data sequentially, while LinkedList is better for frequent insertion and deletion operations.

• Exampl...read more

To delete and remove duplicates from an array of strings, use a set to store unique values.

• Convert the array to a set to automatically remove duplicates

• Convert the set back to a list to maintain the original order

• Example: array = ['apple', 'banana', 'apple', 'orange']

• Set(array) will result in {'apple', 'banana', 'orange'}

• List(set(array)) will give ['apple', 'banana', 'orange']

Find the first missing positive integer in a list of numbers

• Sort the list and iterate through it to find the first positive integer

• Use a set to keep track of positive integers already seen

• Return the first positive integer not in the set

Function to determine if a given string is a palindrome

• Create a function that takes a string as input

• Remove all non-alphanumeric characters and convert to lowercase

• Compare the string with its reverse to check if it is a palindrome

• Return True if it is a palindrome, False otherwise

Python is a high-level programming language known for its simplicity and readability. Functions are blocks of code that perform a specific task.

• Python is a high-level, interpreted, and general-purpose programming language.

• Features of Python include easy syntax, dynamic typing, automatic memory management, and extensive standard libraries.

• Functions in Python are blocks of code that perform a specific task and can be reused throughout the program.

• Example: def greet(name): print...read more

API stands for Application Programming Interface. It is used in development to allow different software applications to communicate with each other.

• APIs define the methods and data formats that applications can use to request and exchange information.

• They allow developers to access the functionality of a service or application without needing to understand its internal workings.

• APIs are commonly used to integrate different systems, automate tasks, and extend the functionality...read more

Strengths: Strong problem-solving skills, attention to detail, and ability to work well in a team. Weaknesses: Lack of experience with certain frameworks and technologies.

• Strength: Strong problem-solving skills

• Strength: Attention to detail

• Strength: Ability to work well in a team

• Weakness: Lack of experience with certain frameworks and technologies

Advantages and disadvantages of Python Fullstack Developer role

• Advantages: versatile skill set, high demand in the job market, ability to work on both front-end and back-end development

• Disadvantages: potential for burnout due to working on multiple aspects of a project, need to stay updated with constantly evolving technologies

Python list and tuple are both data structures used to store multiple items in a single variable, but list is mutable while tuple is immutable.

• List is defined using square brackets [] and can be modified after creation.

• Tuple is defined using parentheses () and cannot be modified after creation.

• Example of list: my_list = [1, 'apple', True]

• Example of tuple: my_tuple = (2, 'banana', False)

Access modifiers in Python are keywords used to restrict access to certain class members.

• Access modifiers in Python include public, protected, and private keywords.

• Public members can be accessed from outside the class, protected members can be accessed within the same module or subclass, and private members can only be accessed within the same class.

• Public members do not have any special symbol, protected members have a single underscore (_) prefix, and private members have a...read more

Worked with Django, Flask, and FastAPI frameworks in Python.

• Django - Full-featured web framework for building web applications.

• Flask - Lightweight web framework for small to medium-sized projects.

• FastAPI - Modern web framework for building APIs with high performance.

Docker is a platform for developing, shipping, and running applications in containers.

• Docker allows developers to package up an application with all of its dependencies into a standardized unit called a container.

• Containers are lightweight, standalone, and can run on any machine that has Docker installed.

• Docker simplifies the process of building, shipping, and running applications across different environments.

• Example: Running a Python web application in a Docker container.

• Ex...read more

Kubernetes is an open-source container orchestration platform for automating deployment, scaling, and managing containerized applications.

• Kubernetes helps in automating the deployment, scaling, and management of containerized applications.

• It allows for easy scaling of applications by adding or removing containers based on demand.

• Kubernetes provides features like load balancing, self-healing, and rolling updates for applications.

• It simplifies the management of containers by ab...read more

The __init__() method is a special method in Python classes used to initialize new objects.

• The __init__() method is called when a new object is created from a class.

• It is used to initialize the attributes of the object.

• The __init__() method is similar to a constructor in other programming languages.

List is mutable, tuple is immutable in Python.

• List is defined using square brackets [], tuple using parentheses ().

• Elements in list can be changed, added, or removed. Tuple elements cannot be changed once defined.

• Lists are used for collections of items that may need to be modified. Tuples are used for fixed collections of items.

• Example: list_example = [1, 2, 3], tuple_example = (4, 5, 6)

Interceptors are used to intercept and manipulate HTTP requests and responses in web applications.

• Interceptors can be used for logging, authentication, error handling, caching, and modifying request/response headers.

• In Angular, interceptors are used to add authentication tokens to outgoing requests or handle errors globally.

• In Spring Boot, interceptors can be used to log incoming requests, validate input, or modify response data.

Core Python refers to the basic and essential components of the Python programming language.

• Core Python includes fundamental concepts like data types, control structures, functions, and modules.

• It does not include any external libraries or frameworks like Django or NumPy.

• Understanding core Python is essential for building a strong foundation in Python programming.

Authentication in RestApi involves verifying the identity of users before granting access to resources.

• Use tokens (JWT) for authentication

• Implement OAuth for secure authentication

• Utilize session management for user authentication

• Implement two-factor authentication for added security

useEffect is used for side effects in functional components, while useState is used for managing state.

• useEffect is used to perform side effects in functional components, like data fetching, subscriptions, or manually changing the DOM

• useState is used to manage state in functional components, allowing the component to re-render when the state changes

• Example: useEffect can be used to fetch data from an API when the component mounts, while useState can be used to store and updat...read more

Total full stack queries refer to the number of queries made to the full stack of technologies in a web application.

• Full stack queries involve interacting with both the front-end and back-end of a web application.

• Examples of full stack queries include fetching data from a database, updating user interface elements, and handling form submissions.

• Understanding how to optimize full stack queries can improve the performance of a web application.

Exception handling in Python is a way to handle errors that may occur during the execution of a program.

• Use try-except blocks to catch and handle exceptions

• Different types of exceptions can be caught and handled separately

• Use finally block to execute code regardless of whether an exception occurred

• Custom exceptions can be defined by creating a new class that inherits from the Exception class

Use the print function in Python to display an error message.

• Use the print function followed by the error message enclosed in quotes

• You can also use the sys module to display more detailed error messages

• Consider using try-except blocks to catch and print specific errors

Redux flow is a predictable state container for JavaScript apps.

• Actions are dispatched to the store

• Reducers specify how the state changes in response to actions

• State is updated immutably

• Components subscribe to the store to get updated state