You're tasked with implementing a many-to-many relationship between two tables in a database. How would you achieve this using SQL?
Difficulty level
Create a Junction Table
Use Foreign Keys and Triggers
Implement Subqueries
Utilize Views and Stored Procedures
To implement a many-to-many relationship in a database, creating a Junction Table is a common approach. This involves creating a separate table to represent the relationship between the two entities. The correct option suggests using a Junction Table.
When considering data migration, what is the significance of data mapping?
Difficulty level
Defining migration tools
Estimating migration time
Matching source and target data structures
Verifying data integrity
Data mapping in data migration is significant for matching source and target data structures. It involves defining how data from the source system maps to the target system, ensuring a smooth and accurate migration process.
In Git, a merge conflict occurs when two branches have made changes to the _______ lines of code in a file.
Difficulty level
Different
Important
Same
Specific
A merge conflict in Git arises when two branches have made changes to the same lines of code in a file. Git cannot automatically merge these changes, requiring manual resolution.
In a CI/CD pipeline, a developer pushes a code change to the repository. Describe the steps involved in the CI/CD pipeline until the change is deployed to production.
Code Review, Unit Testing, Deployment to QA, User Acceptance Testing, Production Deployment, Rollback
In a typical CI/CD pipeline, after a developer pushes code, the process involves automated code review, unit testing, continuous integration, continuous deployment, monitoring, and the possibility of rollback if issues are detected. This ensures a streamlined and automated path from code change to production.
Enabling _______ compression can reduce the size of files transferred over the network, improving overall performance.
Difficulty level
Gzip
RAR
Tar
ZIP
Enabling Gzip compression is a common practice to reduce the size of files transferred over the network. Gzip compresses files before sending them, reducing bandwidth usage and improving overall performance.
In a web application, you want to fetch data from an external API asynchronously. Which JavaScript feature would you use for this purpose?
Difficulty level
Promise
Callback functions
Async/Await
Observables
To fetch data from an external API asynchronously in a web application using JavaScript, you would use the Async/Await feature. It simplifies the asynchronous code and makes it more readable. The correct option reflects modern asynchronous programming practices.
What is the purpose of the Git command "git merge"?
Difficulty level
To combine changes from different branches
To create a new branch
To delete a branch
To rename a branch
The purpose of the Git command git merge is to combine changes from different branches. It integrates changes from the specified branch into the current branch, facilitating collaboration and code integration.
MongoDB is a document-oriented database, making option 1 the correct answer. It is designed for storing, querying, and processing large amounts of unstructured data in a JSON-like format known as BSON.
Azure _______ is used for monitoring and diagnostics of applications deployed on Azure.
Difficulty level
Application Insights
Azure Blob Storage
Azure DevOps
Azure Monitor
Azure Monitor is used for monitoring and diagnostics of applications deployed on Azure. It provides insights into the performance and availability of applications and infrastructure, helping to identify and troubleshoot issues.