In Cassandra, what is a partition key used for?
- Defines the primary key of a table
- Determines the node responsible for storing data
- Provides high availability
- Sorts data within a partition
In Cassandra, the partition key is used to determine the node responsible for storing data. It plays a crucial role in the distribution and retrieval of data in a distributed database.
What tool is commonly used to analyze website performance metrics like load time and resource utilization?
- Git
- Google PageSpeed Insights
- Sublime Text
- Wireshark
Google PageSpeed Insights is commonly used to analyze website performance metrics like load time and resource utilization. It provides insights and recommendations for optimizing web pages to enhance user experience and search engine rankings.
Which collaboration tool allows developers to create and maintain their own repositories, as well as contribute to open-source projects hosted by others?
- GitHub
- Bitbucket
- GitLab
- SourceForge
GitHub is the correct option. GitHub is a widely-used platform that allows developers to create and manage their repositories. Moreover, it serves as a hub for collaborative development, enabling contributions to open-source projects hosted by others.
What is GitHub Flow?
- A Git branching model
- A Git command
- A feature in Git
- A workflow for using GitHub
GitHub Flow is a lightweight, branch-based workflow for using GitHub. It emphasizes frequent, small releases and incorporates continuous delivery principles. It involves creating branches for new features or fixes, opening pull requests, and deploying after the code is reviewed and tested.
The process of rearranging the elements of an array such that all the elements less than the pivot are on its left and all the elements greater than the pivot are on its right is called _______.
- Indexing
- Partitioning
- Shuffling
- Sorting
The process described is called partitioning. It is a fundamental step in various sorting algorithms like QuickSort, where a pivot is chosen, and elements are rearranged based on their relation to the pivot.
The process of improving code without changing its behavior is known as _______.
- Debugging
- Enhancing
- Optimizing
- Refactoring
The process of improving code without changing its behavior is known as refactoring. Refactoring involves restructuring existing code to make it more readable, maintainable, and efficient, without altering its external functionality.
Ruby's support for microservices architecture and frameworks like _______ has led to its popularity in building scalable web applications.
- Cubism
- Rails
- Roda
- Sinatra
Ruby's support for microservices architecture and frameworks like Rails (Ruby on Rails) has led to its popularity in building scalable web applications.
What is denormalization in database design, and when might it be appropriate to use?
- Adding Redundancy
- Increasing Normalization
- Reducing Normalization
- Removing Data Duplication
Denormalization in database design involves introducing redundancy by adding redundant data. It may be appropriate when read performance is a priority, and the cost of increased storage and potential update anomalies can be justified.
_______ caching stores copies of frequently accessed data on the client-side.
- Browser
- Client
- Frontend
- Local
Client caching involves storing copies of frequently accessed data on the client-side. This reduces the need to fetch the data from the server, improving performance.
You're working on a project and need to add a new feature. How would you approach it using TDD?
- Implement the feature directly and then write tests to validate it
- Skip testing for new features as they might not have a significant impact
- Write a failing test for the new feature, implement the feature to pass the test, refactor if needed
- Write tests after implementing the feature to ensure its correctness
The TDD (Test-Driven Development) approach involves writing a failing test first, then implementing the feature to make the test pass, and finally refactoring if necessary. This process helps ensure that the feature works as expected and catches regressions early.
Ruby is frequently used for server-side scripting in web development, particularly with frameworks like _______ on Rails.
- Django
- Laravel
- Ruby
- Ruby
Ruby is frequently used for server-side scripting in web development, particularly with frameworks like Ruby on Rails. Ruby on Rails is a popular web development framework.
What does merging in Git involve?
- Combining changes from one branch to another
- Creating a new repository
- Deleting branches in a repository
- Rewriting commit history
Merging in Git involves combining changes from one branch to another. It allows developers to integrate changes made in one branch into another branch, typically merging feature branches into the main development branch.