GrapplTech Software Developer 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

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

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

Spring MVC is a framework for building web applications using the Model-View-Controller architecture.

• Spring MVC separates the application into three components: Model, View, and Controller.

• The Model represents the data and business logic, the View is responsible for rendering the UI, and the Controller handles user input and manages the flow of data between the Model and View.

• Spring MVC provides a variety of features s...read more

Object-oriented programming is a programming paradigm based on the concept of objects.

• Objects are instances of classes that encapsulate data and behavior

• Inheritance allows classes to inherit properties and methods from parent classes

• Polymorphism allows objects to take on multiple forms and behave differently based on context

Exception handling is the process of handling runtime errors in a program.

• It is used to prevent the program from crashing due to unexpected errors.

• It involves catching and handling exceptions using try-catch blocks.

• The catch block contains code to handle the exception and prevent the program from terminating.

• Examples of exceptions include null pointer exceptions, arithmetic exceptions, and array index out of bounds exc