Which of the following is a common method to prevent Cross-Site Scripting (XSS) attacks?
- Cross-Site Request Forgery (CSRF)
- Input validation
- Output encoding
- Session hijacking
Output encoding is a common method to prevent Cross-Site Scripting (XSS) attacks. By encoding user-input before displaying it in a web page, potential malicious scripts are neutralized, reducing the risk of XSS vulnerabilities.
Implementing _______ loading allows resources like images and scripts to be loaded asynchronously, improving overall performance.
- Asynchronous
- Parallel
- Sequential
- Synchronous
Asynchronous loading enables resources to load independently of the main page, preventing them from blocking other page elements. This contributes to faster page rendering and improved performance.
What is the purpose of hash tables in data structures?
- Creating a linked list of data elements.
- Efficient data retrieval and storage by mapping keys to array indices using a hash function.
- Sorting elements based on their hash values.
- Storing data in a random order for quick access.
Hash tables are data structures that use a hash function to map keys to array indices, allowing for efficient data retrieval and storage. This structure enables constant-time average-case complexity for common operations like insertions, deletions, and searches.
You're tasked with developing a real-time chat application. Considering scalability and event-driven architecture, which server-side language would you choose and why?
- Java
- Node.js
- Python
- Ruby
For a real-time chat application requiring scalability and event-driven architecture, Node.js is a suitable choice. Its non-blocking, asynchronous nature makes it well-suited for handling numerous concurrent connections in a real-time scenario.
You're working on a project where rapid prototyping is crucial. Which framework would be most suitable and why?
- Express.js
- Flask
- Ruby on Rails
- Spring Boot
Flask, a lightweight Python web framework, is ideal for rapid prototyping. Its simplicity and flexibility allow developers to quickly build and iterate on prototypes, making it a preferred choice for projects with tight timelines.
What is the difference between BFS (Breadth-First Search) and DFS (Depth-First Search)?
- BFS always finds the shortest path, while DFS may not
- BFS explores graph by depth, while DFS explores breadth-wise
- BFS explores graph level by level, while DFS explores as far as possible along each branch before backtracking
- BFS is recursive, while DFS is iterative
BFS (Breadth-First Search) explores a graph level by level, while DFS (Depth-First Search) explores as far as possible along each branch before backtracking. Understanding these differences is crucial for choosing the right algorithm for a specific problem.
Which AWS service is used for container orchestration?
- AWS Lambda
- Amazon ECS
- Amazon RDS
- Amazon S3
Amazon ECS (Elastic Container Service) is the AWS service used for container orchestration. It allows users to run, stop, and manage Docker containers on a cluster, making it easier to deploy and scale containerized applications.
_______ is a principle in OOP that promotes the idea of coding to an interface rather than an implementation.
- Dependency Injection
- Encapsulation
- Interface Segregation
- Inversion of Control
Interface Segregation is a principle in OOP that encourages coding to an interface rather than an implementation. It emphasizes creating small, client-specific interfaces to prevent unnecessary dependencies.
In JavaScript, the console.log() method is commonly used for _______.
- Creating variables
- Mathematical calculations
- Printing output to the console
- Styling HTML elements
The console.log() method in JavaScript is commonly used for printing output to the console. It is helpful for debugging and monitoring the flow of the program.
In responsive design, a grid system helps in organizing content into _______.
- Columns
- Grids
- Modules
- Rows
In responsive design, a grid system helps in organizing content into modules. It provides a structured layout for arranging elements on a webpage, facilitating a responsive and visually appealing design.