Wonderla Holidays Interview Questions and Answers

The WHERE condition in Oracle allows filtering of data based on specified criteria.

• The WHERE condition is used in SQL queries to filter rows based on specified conditions.

• It can be used with various operators such as =, <>, >, <, >=, <=, LIKE, IN, BETWEEN, etc.

• Multiple conditions can be combined using logical operators such as AND, OR, and NOT.

• The WHERE condition can be used to filter data based on specific values, ranges, patterns, or combinations of conditions.

• For example, ...read more

To handle scale and latency issues, we use design patterns like load balancing, caching, and asynchronous processing.

• Load balancing distributes traffic across multiple servers to prevent overload.

• Caching stores frequently accessed data in memory to reduce latency.

• Asynchronous processing allows tasks to be executed in the background, freeing up resources for other tasks.

• We also use horizontal scaling, sharding, and partitioning to handle large amounts of data.

• Examples of tools...read more

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine, providing an event-driven, non-blocking I/O model.

• Node.js uses an event-driven architecture, allowing for asynchronous programming.

• It utilizes the V8 JavaScript engine to execute JavaScript code.

• Node.js uses a single-threaded event loop to handle multiple concurrent requests efficiently.

• It provides a rich set of built-in modules and libraries for various functionalities.

• Node.js can be used to build scalab...read more

Designing for blind users requires a focus on accessibility and usability through non-visual means.

• Consider using tactile elements for navigation and interaction

• Provide audio feedback for important actions and information

• Ensure compatibility with screen readers and other assistive technologies

• Use high contrast colors and clear typography for readability

• Include alternative text for images and graphics