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.
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.
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.
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.
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.
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.
How can statistics about data distribution be used in query optimization?
- Data distribution statistics are not relevant for query optimization and are primarily used for reporting purposes.
- Data distribution statistics are only useful for offline analytics and have no impact on real-time query optimization.
- Statistics guide query optimization by determining the order of query execution without impacting performance.
- Statistics help identify anomalies in data distribution, leading to improved query performance by fine-tuning indexing strategies.
Statistics about data distribution play a crucial role in query optimization, aiding in the creation of efficient execution plans for queries.
Which metric is commonly used to measure the success of a CI/CD pipeline?
- Code Churn
- Code Complexity
- Lead Time for Changes
- Lines of Code
Lead Time for Changes is a commonly used metric to measure the success of a CI/CD pipeline. It represents the time taken for a code change to be implemented and deployed into a production environment. Shorter lead times indicate faster and more efficient pipelines.
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.
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.