18 WordPress Developer interview questions and answers

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How can you improve WordPress security?


WordPress is a secure platform by default, but like any other system, it is susceptible to attacks. To enhance security, you should:

  • Use strong, unique passwords for database and admin access.
  • Keep WordPress, along with its themes and plugins, updated.
  • Choose a secure WordPress hosting provider.
  • Install a security plugin like Wordfence or Sucuri for active security monitoring.
  • Enable SSL to encrypt data transmitted between your server and users’ browsers.
  • Limit login attempts and change the default wp-admin login URL.
  • Regularly back up your WordPress site.


What is WordPress?


WordPress is a free and open-source content management system (CMS) based on PHP and MySQL. It's used widely to create websites, from small personal blogs to large corporate sites. WordPress is highly customizable through themes and plugins, making it adaptable for almost any type of website.

Describe some essential features of WordPress.


Key features of WordPress include:

  • Ease of installation and setup.
  • A user-friendly administrative dashboard.
  • Extensive theme system which allows for the customization of site aesthetics.
  • Plugin architecture that enables adding extra functionality.
  • Strong SEO capabilities, enhanced by plugins like Yoast SEO.
  • Responsive and mobile-friendly design.
  • Robust community support and continuous development.


What are WordPress plugins?


Plugins are pieces of software containing functions that add specific features and extend the functionality of a WordPress website. Plugins integrate seamlessly with WordPress, allowing you to add features like shopping carts, galleries, contact forms, and more without needing to write any code.

How can you create a WordPress plugin?


To create a WordPress plugin, follow these steps:

  • Create a new folder in the wp-content/plugins directory.
  • Inside this folder, create a PHP file with a unique name.
  • Start the file with a PHP comment block that contains the plugin’s metadata (Plugin Name, Plugin URI, Description, Version, Author, License).
  • Write the PHP code to add your desired functionality.
  • Activate the plugin through the WordPress admin panel.


What limitations does WordPress have?


While WordPress is extremely flexible, it has limitations:

  • It can become slow with excessive plugins or custom edits.
  • As it is database-driven, high traffic can lead to performance issues unless properly optimized.
  • Customization often requires knowledge of PHP, HTML, CSS, and JavaScript.
  • Frequent updates are necessary for security and functionality, which can sometimes break existing plugins or themes.


What are the requirements to run WordPress?


To run WordPress, your host needs:

  • PHP version 7.3 or greater.
  • MySQL version 5.6 or greater, or MariaDB version 10.1 or greater.
  • HTTPS support.
  • Apache or Nginx as the most robust server options.


How many tables are there by default in WordPress?


A fresh WordPress installation creates 12 default tables in the database. These tables store everything from posts and pages to comments, users, site options, and more.

How can you change the WordPress database table prefix?


To change the table prefix:

  • Edit the $table_prefix line in the wp-config.php file to something unique.
  • Use a database management tool like phpMyAdmin to rename existing database tables to the new prefix.


What should you do if your WordPress site is hacked?


If your WordPress site is compromised:

  • Immediately change all passwords and user credentials.
  • Update all plugins, themes, and core WordPress files.
  • Scan your site with a security plugin to identify and remove malicious code.
  • Restore from a backup if necessary.
  • Implement stronger security measures to prevent future attacks.


How do you update WordPress?


WordPress can be updated using one of these methods:

  • Automatic updates: For minor releases and security updates.
  • Manual updates: By downloading the latest version from WordPress.org and using FTP to upload it to your server, replacing all files of the previous installation.


Explain the difference between posts and pages.

  • Posts are part of a blog and appear in reverse-chronological order (newest items displayed first). Posts are usually timely or informational updates about a certain topic or event.
  • Pages are static and are not tied to a timeline. A page might include an About Us or Contact Information section. Pages are used for content that is less likely to change frequently.

Can you create custom post types in WordPress?

Yes, custom post types can be created to handle specific content types like products, reviews, or services in a structured way. You can create custom post types by adding code to your theme's functions.php file or by using a plugin like Custom Post Type UI.

Where is WordPress content stored?

WordPress stores content within the MySQL database. For example, posts and pages are stored in the wp_posts table, whereas settings are stored in the wp_options table.

Do deactivated plugins slow down WordPress?

Deactivated plugins do not slow down WordPress because they are not loaded by the system. However, for security reasons and to keep your site clean, it is recommended to delete any deactivated plugins that are not intended for future use.

What is a WordPress Loop?


The Loop is a PHP code used by WordPress to display posts through a repeated process. It checks for posts, and as long as posts are available, it displays these posts according to how it is called in the theme.

How can comments be disabled on WordPress?

  • Go to the Discussion settings in WordPress and uncheck "Allow people to submit comments on new posts".
  • Disable comments on existing posts individually through the Quick Edit option for each post in the dashboard.

What are WordPress configuration files?

The primary configuration file in WordPress is wp-config.php. It contains settings related to database connections, security keys, and WordPress salts. Editing this file allows you to enable/disable certain features and behaviors of WordPress.

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    Eyamin H.
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    • 5.0
    • (191 jobs)
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    Hi. Thank you so much for coming here. I'm WordPress developer. I have been working with WordPress last 6 years. I have developed a wide range web development project. Experience ================= *** html5 , css , css3 , sass , bootstrap , Custom Responsive , JavaScript , jQuery , jQuery Ui , Ajax , Gulp Automation , php , WordPress , WordPress Theme And Plugin Development , Git , Bit-bucket , GitHub ****** #Squarespace Website Builder is my new crush. :) Provide Services =============== ** Full Functionality WordPress theme development with Woo-commerce Support. ** Custom WordPress Plugin Development ** Psd to WordPress. ** Pixel Perfect WordPress Website using page Builder. * Elementor Builder * Divi Builder * Visual Composer * SiteOrigin * Beaver Builder * Fushion Builder ** WordPress Theme Customization any kind of theme. ** Woo-commerce for eCommerce website . * Have Very good knowledge about product feature and attribute ** Psd to html. ** Psd to html with Bootstrap. ** Any Kind of WordPress problem. ** 100% responsive Website. ** Any kind of JQuery, JavaScript Problem. ** Site page Speed. (gtmetrix) , )( Google PageSpeed Insights). My aim is to give you back your project within your right time. and to work in a standard way where clients will be "SATISFIED" of my work .
  • $80 hourly
    Eric G.
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    • 4.7
    • (87 jobs)
    Metz, GES
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    WordPress Malware Removal
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    I am a problem-solver, If you're facing any issues with your wordpress or woocommerce, I'm probably able to fix it for you. As a Top Rated Plus WordPress and WooCommerce expert, I specialize in solving website issues and providing technical solutions with a focus on core functions. With over 10 years of experience, I can help you with Bugs, features, custom code, fixtures, customization, security, accessibility, and speed enhancement. ✔️ Technical approach of core functions (less plugin for best results) ✔️ SEO, Security, and Accessibility ✔️ Speed enhancement (GT metric / Page speed) ✔️ Images and media optimization (photoshop batch again no plugin) ✔️ Fast and efficient support for your business When it comes to Crocoblocks and Jet Engine, I have extensive experience in building dynamic websites with custom post types, dynamic fields, and dynamic templates. I can help you create advanced search and filter options, custom WooCommerce templates, and much more. At the same time, I understand the importance of website performance and user experience. That's why I use my skills to optimize your website for speed and accessibility, so your visitors can enjoy a seamless experience while browsing your website. ★ Having a Nice Website is great, but a Website that converts visitors into leads is better! I believe that having a nice website is great, but a website that converts visitors into leads is better. With my experience in eCommerce, I can help you transform as many visitors as possible into customers. I have worked with the Woodmart theme for several years, which allows me to deliver various websites and meet all specific requests. I use Elementor and Crocoblocks to create outstanding websites with eye-catching pages and an excellent user experience. 💻 During my experiences, I was able to observe the evolution of e-commerce and use my expertise to transform as many visitors as possible into customers. I can support you throughout your go-to-market process by configuring Google Ads/Analytics, implementing customized tracking, setting up a product catalog for shopping flow, optimizing attribute management, creating topic clusters, and developing custom features. Nothing escapes my attention as I am a perfectionist who delivers tasks on time. ✔️ Configuration of google ads / analytics ✔️ Implementation of customised tracking ✔️ Product catalog for shopping flow ✔️ Optimized attribute management ✔️ Topic cluster ✔️ Custom features I pride myself on delivering high-quality work and excellent customer service. If you choose to work with me, you can expect fast and responsive communication, fast turnaround times, and a dedication to ensuring that your website meets all of your needs and expectations. In short, whether you need help with WordPress, WooCommerce, Elementor, or Crocoblocks Jet Engine, I have the expertise to help you achieve your goals. So why not get in touch today to discuss your project and see how I can help take your online business to the next level? I have worked with national leaders and international companies, and I would be happy to help you too. With my expertise in WordPress, WooCommerce, Elementor, and Crocoblocks Jet Engine, I can help take your online business to the next level. ☞ Do not hesitate to contact me and check my profil my references.
  • $35 hourly
    Hannah C.
    WordPress Developer
    • 5.0
    • (22 jobs)
    Valencia City, BUKIDNON
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    Jack-of-all-Trades Virtual Assistant | Expert in YouTube Channel Optimization, WordPress & Shopify, eCommerce Product Management With OVER 16,000+ HOURS OF WORK here in Upwork, a 100% 🔥 client satisfaction rate, and a 100% 🔥 Job Success Score! Hi! I'm Hannah C., a full-time virtual assistant with a wide range of skills and an all-rounder experience with YouTube SEO and Account Management, WordPress Website Development, Design, and Administrative Management, General Dropshipping, Woocommerce, Corecommerce, and eCommerce Product Management, Digital Marketing, Business Marketing Management, TradeShow Marketing Product SEO, Shopify Product Management, Data Entry Specialist, and Social Media Management. A Graduate of a 4-year Course in Bachelor of Science in Information Technology. Former Transcriptionist and Data Entry Specialist in an online Note Taking Express Company. I'm a certified YouTube Management Expert that is capable of growing your YouTube channel and increasing video views with the latest YouTube Algorithm and SEO strategy for massive results. I have optimized over 4,000 videos and grown a channel from 100k subscribers to over 9 million subscribers in a span of 3-4 years. ✅YouTube Channel Set Up ✅YouTube Keyword Research (using vidIQ & TubeBuddy) ✅Title, Description, Tags, Thumbnail A/B Testing ✅Channel audit & YouTube analytics ✅Overall Channel Management ✅ Competitors' research and market analysis ✅Video optimization (Description, Tags, Endscreen Elements, Playlist, Product Links) ✅YouTube SEO ✅Video Rank on YouTube ✅Video Rank on Google ✅Video Topic Keyword Research ✅YouTube channel customization (Full Profile) ✅ Generating YouTube video daily ideas accurate to your Channel ✅Monetization eligibility ✅YouTube copyright claim protection and remove ✅YouTube display ads ✅ Scheduling videos for daily publish Aside from working with YouTube SEO and account management, I am also an expert in Product management both in WordPress and eCommerce websites like Shopify. ☑ Creating eCommerce Stores from scratch ☑ Optimizing website theme and products ☑ Optimizing and Adding Products from provided product catalogs ☑ Modifying product prices, descriptions, and templates ☑ Uploading High definition high-quality product images ☑ Updating a LARGE amount of product inventory in a WooCommerce website ☑ Finding inventory numbers in a Google doc by referring to the product SKU ☑ Updating product sheet and indicating items that have been updated ☑ Updating inventory numbers of simple and variable products in WooCommerce for WordPress ☑ Adding WordPress Tags to products ☑ Adding an Attribute to products (not used for product variations) ☑ Optimizing formatting issues in the Product Description SKILLS: Virtual Assistant Digital Marketing Web Development and Web Design Content Management YouTube Account Manager Project Management Amazon Product SEO Shopify Product Management General Dropshipping using Oberlo, Aliexpress, Alibaba, Shopify WordPress Website Management Build Shopify Websites Publishing Blog Post Lead Marketing for Specific Businesses Social Media Business Marketing Management Social Media Management Data Entry Specialist | Data Mining | Data Scraping Web Research | Marketing Research Managing YouTube Account (General YouTube Optimization) STRENGTHS: ☆ ATTENTION TO DETAIL ☆ EFFICIENT ☆ TRUSTWORTHY ☆ FUN TO WORK WITH ☆ KIND-HEARTED Looking forward to working with you in the future. HC.✨
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