Which of the following elements is used to create a hyperlink in HTML?
In a large-scale e-commerce platform, multiple users are trying to purchase the same limited-stock item simultaneously. How would you handle concurrent transactions to ensure fair access and prevent overselling?
- Implementing a Reservation System
- Optimistic Locking
- Rate Limiting Purchases
- Using a Queue for Order Processing
To address concurrent purchases of limited-stock items, implementing a reservation system is effective. This involves temporarily reserving stock for a user during the checkout process, ensuring fair access and preventing overselling by managing stock availability in real-time.
JavaScript _______ are objects that store collections of key-value pairs.
- Arrays
- Maps
- Objects
- Sets
JavaScript Maps are objects that store collections of key-value pairs. Unlike Objects, they allow any data type as a key and provide methods for easy manipulation.
What is the difference between client-side caching and server-side caching?
- Both client-side and server-side caching are the same.
- Client-side caching stores data on the server to improve performance. Server-side caching stores data in the user's browser cache.
- Client-side caching stores data on the user's device, reducing server requests. Server-side caching stores data on the server, reducing database or application server load.
- Neither client-side nor server-side caching exists.
Client-side caching occurs on the user's device, reducing the need for repeated server requests. Server-side caching, on the other hand, involves storing data on the server, alleviating load and enhancing overall system performance.
You're collaborating with a team on a project, and you need to review changes made by another developer before merging them into the main branch. How would you do this in Git?
- git diff HEAD..origin/branch-name
- git fetch and git merge origin/branch-name
- git log origin/branch-name
- git pull origin branch-name
You would use git fetch to retrieve changes from the remote repository and then git merge origin/branch-name to merge the changes locally for review before merging into the main branch.
You're leading a software development team that follows the Agile methodology. How would you ensure effective communication and collaboration among team members?
- Annual Team Retreats
- Daily Standup Meetings
- Email Communication
- Monthly Status Reports
In Agile, daily standup meetings are crucial for effective communication and collaboration. These short, focused meetings help team members discuss progress, challenges, and plans, fostering a collaborative and transparent environment. Email communication and periodic reports may not provide the real-time interaction needed in Agile.
What is the purpose of JWT (JSON Web Token) in authentication?
- Authenticating the server to the client
- Encrypting the user's password
- Securely transmitting information between parties
- Storing sensitive information in the client-side
The purpose of JWT is to securely transmit information between parties. It is a compact, URL-safe means of representing claims to be transferred between two parties.
Which of the following is NOT an authentication factor?
- Geographical location
- Something you are
- Something you have
- Something you know
Geographical location is not a typical authentication factor. Authentication factors include knowledge (passwords), possession (smart cards), and biometrics (fingerprint).
You suspect that a JavaScript function is causing errors on your web page. How would you use Browser Developer Tools to identify and fix the problem?
- Analyze the Sources panel to step through and debug JavaScript code
- Check the Network tab for JavaScript file loading issues
- Inspect the Elements panel for JavaScript-related layout problems
- Use the Console tab to log and debug JavaScript errors
The Sources panel in Browser Developer Tools is used to step through and debug JavaScript code, helping identify and fix errors in functions causing issues on the web page.
_______ is the process of dividing a database into multiple independent databases to distribute load.
- Clustering
- Partitioning
- Replication
- Sharding
Sharding is the process of dividing a database into multiple independent databases to distribute load. It is commonly used in large-scale distributed systems to improve performance and scalability.