Walstar Technologies Interview Questions and Answers

Semantic HTML elements clearly describe their meaning in a human- and machine-readable way, enhancing accessibility and SEO.

• Examples include <header>, <footer>, <article>, and <section>.

• These elements provide structure and meaning to web pages.

• Using semantic elements improves accessibility for screen readers.

• They help search engines understand the content better.

Two-way data binding in Angular allows automatic synchronization between the model and the view.

• Uses the ngModel directive to bind input fields to component properties.

• Changes in the input field update the model, and vice versa.

• Example: <input [(ngModel)]='username'> binds 'username' property to the input.

• Facilitates easier form handling and validation in Angular applications.

I use Git for version control, enabling collaboration, tracking changes, and managing code efficiently across projects.

• Git: A distributed version control system widely used for tracking changes in source code during software development.

• GitHub: A cloud-based platform that hosts Git repositories, facilitating collaboration and code sharing among developers.

• GitLab: Similar to GitHub, it offers repository hosting along wi...read more

A good website combines usability, design, content, and performance to create an engaging user experience.

• User-Friendly Navigation: Clear menus and intuitive layout help users find information easily. Example: Amazon's categorized navigation.

• Responsive Design: Websites should work well on all devices, from desktops to smartphones. Example: Bootstrap framework.

• Fast Loading Speed: Pages should load quickly to reduce boun...read more

PHP 7 offers significant performance improvements and new features compared to PHP 5, enhancing development efficiency.

• Performance: PHP 7 is up to twice as fast as PHP 5 due to the new Zend Engine.

• Type Declarations: PHP 7 introduced scalar type hints (e.g., int, float) for better type safety.

• Error Handling: PHP 7 uses Throwable interface for better error handling with exceptions.

• Null Coalescing Operator: PHP 7 introduc...read more

Namespaces in PHP help organize code and avoid name collisions in larger applications.

• Namespaces allow grouping of related classes, functions, and constants.

• They prevent naming conflicts when using libraries or frameworks.

• Defined using the 'namespace' keyword at the beginning of a file.

• Example: namespace MyApp\Controllers; defines a namespace for controllers.

• Use 'use' keyword to import classes from a namespace, e.g., u...read more

SEO tools help analyze, optimize, and track website performance to improve search engine rankings.

• Google Analytics: Tracks website traffic and user behavior.

• SEMrush: Offers keyword research, site audits, and competitor analysis.

• Ahrefs: Provides backlink analysis and keyword tracking.

• Moz: Features tools for keyword research and site optimization.

• Yoast SEO: A WordPress plugin that helps optimize content for search engine...read more

Google AdWords is an online advertising platform that allows businesses to create ads for Google search results and display networks.

• AdWords operates on a pay-per-click (PPC) model, meaning advertisers pay only when users click their ads.

• Ads can appear on Google search results pages, as well as on partner websites through the Google Display Network.

• Advertisers can target specific keywords, demographics, and locations t...read more