Python Developer Interview Questions 2023 Guide

Shallow copy is used when a new instance type gets created and it keeps values that are copied whereas deep copy stores values that are already copied. A class can include the values that an object can store and the methods that can be run on an object. A list comprehension is a more “Pythonic” way to create a list.

  • It is used by the interpreter to choose which module to load.
  • These expressions return the indices of the start and end of the substring matched by the group.
  • In the given code, list1[-2] refers to the second-to-last element in the list list1, which is 14.
  • In Python, we for the most part use circles to emphasize over the assortments (list, tuple).
  • The user can use the remove() function to delete a specific object in the list.
  • In the first query, the function print_from_stream(2, OddStream()) is executed, which leads to printing values 1 and 3 in separated lines as the first two non-negative odd numbers.

Behavioral questions also give the interviewers an idea of how you might behave if a similar situation were to occur in the future. From version 3.10 upward, Python has implemented a switch case feature called “structural pattern matching”. You can implement this feature with the match and case keywords.

What are the types of operators in Python?

It also demonstrates your ability to follow industry best practices and your dedication to delivering software that meets the needs of stakeholders. Being able to work with RESTful APIs is a critical skill for a full stack Python developer. APIs facilitate communication between different software components and enable a seamless flow of data and functionality across applications. Diving into your problem-solving skills is essential for interviewers when hiring a Python developer.

When the code returns the global scope, the variable returns to the global value. Multiple independent random number generators are created by the Random class, which is used and instantiated. Dict() – This function is used to convert a tuple of order (key,value) into a dictionary. Unpickling is the procedure of obtaining the original Python objects from the stored string representation.

How do you implement the functionality of switch statements in Python?

Another significant difference is related to Unicode support. In Python 2, strings are stored as ASCII by default, requiring the use of the ‘u’ prefix for Unicode strings. On the other hand, Python 3 stores strings as Unicode by default, simplifying string handling and making it easier to work with international characters. Exception handling is a fundamental skill for any Python developer, as it allows you to gracefully deal with unexpected errors that might occur in your code. Interviewers want to make sure you understand how to handle exceptions using try-except blocks, as well as how to properly log and respond to errors.

Python developer interview questions

Whenever a module is imported, PYTHONPATH is also looked up to check for the presence of the imported modules in various directories. The interpreter uses it to determine which module to load. 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.

Python Developer Interview Questions

Python is a free and open-source language with a very simple and clean syntax which makes it easy for developers to learn Python. It supports object-oriented programming and is most commonly used to perform general-purpose programming. Global scope is a variable that is declared in the main part of a program.

As a Full Stack Python Developer, you’ll be expected to solve problems across a variety of technologies and layers. Interviewers ask this question to gauge your problem-solving abilities, as well as your familiarity with debugging tools and techniques. As a Full Stack Python Developer, you are expected to be proficient in both back-end and front-end development. Demonstrating your familiarity with these technologies highlights your versatility and ability to handle a wide range of tasks, making you a more valuable candidate for the role. To further enhance the effectiveness of the logging module, consider implementing custom handlers and formatters if needed.

What is a dynamically typed language?

In Python, it is important to note that “Function” and “function” are distinct entities, similar to how SQL and Pascal handle them differently. Then, we call the findHeight() function on the left and right subtrees and return the one that has a greater value plus 1. We will not return 0 if the given node is None as the leaf node will have a height of 0. Hence,​ to search for all words matching the color pattern, the code would look something like as follows.

This question focuses on reversing the order of words in a given sentence, demonstrating a developer’s proficiency with string manipulation, loops, conditionals, and other programming constructs. Initially, I used tools like EXPLAIN ANALYZE to analyze query execution plans and pinpoint areas causing delays. This helped me identify problematic queries that were taking longer than expected or consuming excessive resources.

What are the Key features of Python?

By asking this question, interviewers gauge your technical expertise and ability to handle complex, real-world scenarios in software development. As a Python developer, you’ll be expected to optimize the performance of applications and ensure that they run efficiently. Profiling an application is an important aspect of this process, as it helps identify areas of code that might be causing slowdowns or using excessive resources.

Python developer interview questions

A function is a self-contained block of statements with a valid name, list of parameters, and body. Capabilities make programming more practical and particular to perform measured assignments. There are a number of built-in functions for completing tasks in Python, and the user can also create new functions. Indentation is an essential aspect of Python syntax, ensuring proper code structure. It is a method used by programming languages to determine the scope and extent of code blocks. The mandatory requirement of indentation in Python not only enforces consistent code formatting but also enhances code readability, which is likely the reason behind its inclusion.

Node js is frontend or backend?

Generators make it harder to migrate to other Node.js frameworks in the future, and it creates tight coupling with the framework. Finally, Koa doesn’t have a built-in middleware, and conventional middleware like req, res, and next don’t work with Koa. So, if a developer wants to work with middleware, they can create it themselves or use the built-in middleware. Koa provides add-on modules like Koa router, Koa EJS templating, Koa Body Parser, and much more. You can use these frameworks to spin up a fast Node.js server or just to handle CRUD requests. Every framework tries to solve a problem, and the philosophies of each framework will differ.

Is node JS backend or frontend

Even though Node.js itself is a powerful and versatile platform, there are frameworks/approaches that have built upon Node.js to improve it even further. /users – secure route that accepts HTTP GET requests and returns a list of all the users in the application if the HTTP Authorization header contains a valid JWT token. If there is no auth token or the token is invalid then a 401 Unauthorized response is returned. The result is a simple full-stack login application with the front-end built with Angular 14 and the back-end built with Node.js and Express 4.

The catch lies when developers come across inefficient or obscure databases, making it difficult for NPM to identify reliable packages. There comes the need to hire expert developers who can manage it quite well. In that case, it’s highly recommended to hire an expert development team for better development and maintenance of codes. As we touched on above, developers do get this liberty of making an application from scratch, but sometimes it can just get on their shoulders and can end up decreasing productivity and efficiency. If you’re building an application for a browser, there’s no control over the environment or you don’t have an option to select the browser for your visitors. In summary, the Node.js market is growing rapidly as more and more companies and developers adopt this technology, due to its flexibility and scalability.

React (Frontend) – Nodejs (Backend)

Following this guide you can create a simple REST API in java, and then from the front end you just need to make HTTP requests to that API you created. This will create a bundle in the dist folder that you can run in the browser. You can simple run the new index.html file from the dist folder in the browser to see your final result. This is a security requirement you only have to do once. At the bottom of the editor, once you’ve installed the extension you’ll find the ESLint button with a crossed circle in front of it. This allows the ESLint extension to work properly for any future projects as well.

Is node JS backend or frontend

The improvements to security and compatibility that Deno offers are much needed as more businesses expand into web technology. Along with Deno, NestJS is gaining adoption thanks to its extensibility and modularity that make it flexible for growing apps. Node.js is not the best solution when it comes to work with highly loaded threads that involve CPU. It may seem confusing that Node.js is distinct from other technologies, and the differences between them might not be immediately apparent.

Building a Payroll System with Next.js

You don’t have to install Parcel for each project you create, you just do it once. The program comprises a variety of software development courses, ranging from the fundamentals to advanced topics. Node.js provides full-stack development capabilities, allowing us to construct a team that is focused on improving our development life cycle and also letting us respond to problems quickly. This work environment promotes higher productivity and allows us to properly resolve and fix problems.

Now that we have a better understanding whether frontend applications can be used with Node.js, we can answer with a huge YES. Yes, Node.js can be used in both the frontend and backend of applications. Let us now dive into a few of the applications that Node.js supports in the frontend and backend. However, a reputable Node.js development company like us, takes care of your requirements to complete the project and choosing the right front-end and back-end platform. However, what matters most is the skills, experience, and proficiency of the developers and how they apply to the project. I am developing a web application with a small team, and after researching and studying a bit we discovered it is a good practice to separate back-end and front-end projects.

It acts as a support to various frameworks like Hibernate, Struts, EJB, etc. It also has extensions that help in developing Java applications quickly and easily. NestJS code generation helps to develop applications faster, and it follows strict design principles that do a lot of basic development activities for developers. If you know Express, Koa is easy to learn, and with only 600 lines of code, it helps developers write thinner middleware.

An Overview of Backend Tools and Technologies

It is built on an abstraction of other Node.js frameworks like Express and Fastify. This abstraction makes it easy to learn and get up to speed building projects. Image creditDeveloping modern software applications is an essential undertaking for any growing business.

  • For example, developers can use Node.js to build a tool that minifies and concatenates JavaScript files, or a script that automatically updates version numbers in a project’s package.json file.
  • If yes, does every language has its own way or is there a common way?
  • The speed of a successful development cycle is influenced by the presence of a vibrant online community.
  • Koa is not compatible with Express-style middleware, and it uses ES6 generators, which are not compatible with middleware from other frameworks.

So we will develop the back-end as a REST API with hapijs and mysql database, and the front-end using angularjs. One of our cases showed that Node.js can help meeting strict deadlines. The product, an online marketplace for hail damage repair contractors and clients, was set to be launched before the high season started. Choosing between PHP and Node.js, we decided to go with Node.js to meet both the functional requirements and deadlines. Using isomorphic architecture allowed us to reduce the development time. Node.js handles asynchronous input and output much better than other technologies.

A bundler is a tool that takes all your files and turns them into a neat package that you will be able to run in the browser. If we have Node installed we can go to the terminal, navigate to the folder where this file is then run it with Node like this. You can see that the file was executed and the result is in the console. You either have it as part of a website and run the entire website in a browser, or you run only the JavaScript file with Node. Then you’ll need to install the Node.js package manager so that you can quickly install and manage your project’s dependencies.

It can give you a great overview of the latest trends with JavaScript. You can learn which tools and libraries people love to use and which ones will they abandon soon. Here’s a chart from the latest edition of the State of JS survey. In this survey, more than 23,000 developers were asked about their preferences regarding web development. Then go to and follow the steps for installation.

Disadvantages of using Express

Because of its asynchronous nature, the technology generally responds quickly to callbacks. This function runs only after each task in the queue, allowing numerous queued tasks to Node.js Developer job continue processing in the background. Callback hell, as it’s often known, could occur as a result of the callback. This has a direct impact on the code’s performance and quality.

60+ Node JS Statistics That Prove Its Robustness for Future Use – Enterprise Apps Today

60+ Node JS Statistics That Prove Its Robustness for Future Use.

Posted: Thu, 30 Jun 2022 07:00:00 GMT [source]

If you were already a developer before Node.js was introduced, you had to learn a completely different language to write server-side code, like PHP. However, thanks to Node.js and its huge ecosystem, frontend developers are now able to work with the backend using JavaScript as well. Node.js is nothing but an open-source application runtime environment that enables you to write server-side powerful applications using JavaScript. It is very lightweight, efficient as well as capable to use JavaScript on both – front-end and back-end development, and it opens new channels up for web development. The need for scalability is boosted by a widespread shift to serverless and microservice application design. These small, lightweight architectural styles are much different from the large monoliths of traditional software design.

These packages mostly come with descriptions and quick examples to give you an idea of what the library can do for you. When you don’t know the package name you can just google npm and the name of the library you need. Or in case you don’t even know the library name you can also just search for npm 3D library and see what Google comes up with. Now instead of plain CSS, you can also use SCSS for instance. This allows you to use many cool features like nesting declarations, using mixins or calling functions, and more. Once you start this script it will run and generate a live preview of your site until you stop it or close the terminal window.

Is node JS backend or frontend

There are many other languages through which one can do front-end development depending upon the framework for example Flutter uses Dart, React uses JavaScript and Django uses Python, and much more. The front end is the part of the website users can see and interact with such as the graphical user interface and the command line including the design, navigating menus, texts, images, videos, etc. The backend, on the contrary, is the part of the website users cannot see and interact with. NestJS is very versatile, it’s not just a for creating Rest APIs. Grouping the frameworks is not very strict, frameworks can belong to multiple categories.

Now that we have the ESLint extension installed, have an ESLint configuration, and we have the ESlint package installed, we also need to grant the extension access to this package. Before you do that though, first you need to make sure that your project is initialized with npm init. So when you import Three.js in your project, it will look it up in this folder. This folder is again something that you never ever want to change manually. Let’s say we have a website with HTML, CSS, and JavaScript files. Another reason you want to use a bundler is that it can generate a live preview of your website as you are coding.

How To Become A Php Developer In 2022

And of course, certification in the form of a completion certificate once you satisfy the requirements. Save time and get the benefit of unlimited access to features specific to these platforms. To be able to qualify as a senior WordPress developer, you should have a minimum of 5 years of experience and a bachelor’s degree at the minimum. Cost of building a WordPress website can take a heavy toll on their budget. WordPress specialist salary can help you propel your career in a profitable and rewarding capacity.

How much do PHP developers earn

Freelance WordPress developers, full-time WordPress developers, remote WordPress developers from the US, and remote WordPress developers from India. The entry-level positions start at $80,000 per year whereas the most experienced developers make up to $136,500 per year. PHP WordPress developer’s salary can be as high as $118,000 and as low as $30,000. The WordPress plugin developer’s salary range lies between $56,500 to $90,000 . Please note that numerous factors affect WordPress salaries such as your level of experience, job type, type of employment, and location. Three, WordPress developers engage in a wide variety of work, such as building a website and/or maintaining it.

WordPress Developer Average Salary In The Usa: Top

Here are a few compelling reasons why you should compare the average salary of WordPress developers. In the Eastern Europe region, you can hire WordPress developers from Ukraine, which will cost you $980 for junior developers, $1900 for middle-level developers, and $2600 for senior developers. If you hire from Bulgaria, the cost should come to about $1160 to $1740 for a junior to senior skill-level WordPress specialist. The average WordPress developer salary is $50,000 per year or $25.64 per hour for developers based out of Nevada.

How much do PHP developers earn

Explore and assess different alternatives for implementing new application features. What your skills are worth in the job market is constantly changing. Share application logic between web, mobile, and desktop platforms while keeping an experience native to users. On the other hand, as per Indeed, here’s the list of top-5 highest paying states in the USA.

Understanding The Friend Class In C++

Since the job roles vary vastly, the salaries will differ even if the job titles are the same. John Terra lives in Nashua, New Hampshire and has been writing freelance since 1986. Besides his volume of work in the gaming industry, he has written PHP Back-End Engineer job articles for Inc.Magazine and Computer Shopper, as well as software reviews for ZDNet. More recently, he has done extensive work as a professional blogger. Simplilearn offers you a convenient, easy way to master the ins and outs of PHP.

  • In the Latin America region, Brazil and Argentina offer high-quality WordPress developers at lucrative prices.
  • Full-stack WordPress developer salary is $84,583 a year in the United States, which comes up to about $40.66 an hour.
  • According to the Glassdoor article, Junior PHP Developers can pull in an average of $74K annually, while a Senior PHP Developer commands a yearly average of $114K.
  • For entry-level specialists, they charge $490 a month, and intermediate to senior developers charge between $1300-$1400.
  • Communicate with and work alongside other development teams and company management to solve conflicts, establish priorities, select the best solutions, or develop criteria for new content.

For the entry-level positions, the salary starts at $50,000 per year and for the most experienced developers, the salary starts at $97,500 per year. Full-stack WordPress developer salary is $84,583 a year in the United States, which comes up to about $40.66 an hour. On the other hand, according to, the average base salary for a full-stack developer is $100,400. These developers also reportedly get a $5,000 cash bonus per year. Quite simply, a PHP developer is a professional who develops applications, programs, and websites, using the dynamic scripting language called PHP. Sometimes, PHP developers are referred to by more generic titles like “software developer” or “web developer.” However, PHP developers are just a specialized subset of the developer position.

Read on, and discover the best approach to PHP development mastery. If you’re going to be a full-stack developer, then you need to know JavaScript, CSS, and HTML. Keep up with the latest programming practices and web technologies via reading, continuing education opportunities, and participating in relevant professional workshops, groups, and conferences. Based on 40 responses, the job of PHP Developer has received a job satisfaction rating of 3.92 out of 5.

The server executes the PHP code, and then the client receives the generated HTML. That simplicity doesn’t preclude an impressive number of advanced features that any experienced professional programmer will appreciate. PHP is a flexible and powerful scripting language that computer programmers use, especially in the development of web-related tools, applications, and services.

For entry-level specialists, they charge $490 a month, and intermediate to senior developers charge between $1300-$1400. WordPress developer salary based on job role and experience as the key parameters. WordPress development hourly rate or freelance WordPress web developer charges for general and specialized freelance marketplaces. WordPress developer’s salary depends on your project needs, the kind of work expected, the industry, and the kind of specialized skills they are bringing to the table.

The PHP Training Course for PHP Development Suite and the Advanced PHP Development Training will teach you how to make dynamic web applications using PHP. This certification is a comprehensive training course that teaches complete PHP and MySQL fundamentals, CodeIgniter, Laravel 4, and much more. The more you play around with PHP, the more comfortable you’ll become with it. Start small, creating something in pure code, then work your way to more involved programming as you get more familiar with the language. There are many PHP learning resources online as well as classes offered by colleges, adult education programs, or online learning institutes.

As you can see, the highest reported average salary for a WordPress developer is ₹3,47,978 per year which comes from Ahmedabad, Gujarat. Specialized freelance marketplaces require WordPress developers to take tests and undergo a vetting process to prove their skills literally. WordPress developer’s salary depends on various stages of the developer’s career.

What Is Php?

Bear in mind; there’s not just a single PHP course; there are Basic and Advanced courses to consider. For starters, you should have a Bachelor’s degree in a relevant subject, especially something like computer science, software engineering, or programming. Bear in mind, and this degree isn’t mandatory; sometimes, verifiable work experience in one of the above fields will be taken into consideration instead. 79% of all websites whose server-side programming language is everyday knowledge use PHP. The language is everywhere, favored by popular sites such as Etsy, Facebook, Pinterest, Tumblr, Wikipedia, and WordPress.

How much do PHP developers earn

In order to keep up with the rising expectations of web browsers, web developers need to continually enhance their skill set with better and more versatile web development tools. These responsibilities may vary from business to business, depending on things like staff size. A small company may hire a PHP developer to handle anything programming related, while a larger organization may have a full IT/programming department.

Learn Php

If you are on a shoestring budget, it doesn’t make business or logical sense to hire WordPress developers from the United States or Canada. The senior WordPress developer’s salary at an entry-level is $80,000 per year, whereas, for the most experienced developers, it can come up to an impressive $126,750 per year. Remote WordPress developer’s average salary in India ranges from ₹1 Lac to ₹6 Lacs. Average WordPress developer salary can help you to compare your offer against the industry benchmark so that you get access to high-quality talent at an affordable cost. In the Latin America region, Brazil and Argentina offer high-quality WordPress developers at lucrative prices.

Two, comparing the salaries will also help you to understand whether you need the services of a junior WordPress developer or a senior WordPress specialist. According to DAXX, there were over 5,000,000 PHP developers worldwide in 2013, a figure which rose to 5,500,000 by September 2018. PHP developer jobs pay well and offer great opportunities for growth.

There is a large number of programming languages out there, with each one offering its own set of advantages and disadvantages. Data by Indeed also suggests that around 50% of the WordPress developers in the United States think their salaries are enough for the cost of living in their area. WordPress developer salary at $126,750 per year, which comes up to $65 per hour. These theme developers can either be independent contributors or full-time employees , allowing users to buy and sell themes. Four, you can hire a fine-tune and pre-vetted talent with more experience in 40% less salary if you know of the salaries paid to them in other countries. This corporate training solution provides a blended learning delivery model, an Enterprise-grade Learning Management System, 24×7 learner assistance and support.

Through 37 different web development courses, you will acquire all of the necessary tools of web development, culminating in certification, once you’ve completed the requirements. Finally, aspiring PHP professionals should get certified, accomplished by taking a course and passing the certification exam. With that certification under your belt, you show future employers that you are well-versed in PHP programming. Communicate with and work alongside other development teams and company management to solve conflicts, establish priorities, select the best solutions, or develop criteria for new content. Research and explore various architectural considerations relating to the system design process, including web usability, the website’s performance, and database design.

In Asia, you can hire seasoned WordPress developers from India and Pakistan, which should cost you anywhere between $280 to $700. In Southeast Asia, the Philippines offers affordable WordPress developers with junior specialists quoting $560, middle-level developers quoting $700, and senior developers quoting $1000. Similarly, for Payscale, the average salary for a senior WordPress developer is $88,030. Glassdoor estimates that the average base pay for senior developers is $1,03,069/yr, whereas, for Indeed, the average base pay is $99,654. You compare salaries and arm yourself with the requisite knowledge.

Enum In C: Understanding The Concept Of Enumeration

According to Glassdoor, a PHP Developer salary in the US averages $74,126 annually, while a PHP Developer in India earns an average salary of Rs 265,507 per year, according to Payscale. According to the Glassdoor article, Junior PHP Developers can pull in an average of $74K annually, while a Senior PHP Developer commands a yearly average of $114K. Provide detailed descriptions of website specifications such as product features, budget, programming languages, communication protocols, functionalities, structure, and deadlines.