Provakil Technologies Data Analyst Interview Questions and Answers

Design a database for a university with colleges, departments, and students. Write a query to get students with maximum votes.

• Use a relational database like MySQL or PostgreSQL

• Create tables for colleges, departments, students, and elections

• Use foreign keys to establish relationships between tables

• Add columns for election details like candidate names and vote counts

• Write a query to join tables and filter for maximum vot...read more

Design a bit.ly URL shortening service with database choice, table design, and endpoints.

• Use a relational database like MySQL or PostgreSQL for scalability and ACID compliance.

• Create a table with columns for the original URL, shortened URL, and metadata like creation date and click count.

• Endpoints should include URL shortening, redirection, and analytics.

• Implement caching to improve performance and reduce database load...read more

Hooks in WordPress are actions and filters that allow developers to modify or add functionality to WordPress.

• Actions are hooks triggered at specific points in WordPress, such as when a post is published or a user logs in.

• Filters allow developers to modify data before it is displayed, such as changing the content of a post or the title of a page.

• Examples of hooks include 'wp_head', 'wp_footer', 'the_content', and 'the_t...read more

Customizing a child theme involves modifying its CSS and PHP files to override the parent theme's styles and functionality.

• Create a new directory for the child theme in the wp-content/themes/ directory

• Create a style.css file in the child theme directory and add the necessary header information

• Enqueue the parent theme's stylesheet in the child theme's functions.php file

• Override parent theme's styles and functionality by...read more