You're tasked with deploying a new version of an application without downtime. Explain how you would accomplish this using Kubernetes' rolling updates feature.
- Gradually replace old pods with new ones
- Manually update each pod individually
- Rollback to the previous version in case of issues
- Stop all old pods and start the new ones simultaneously
Kubernetes' rolling updates feature allows for the seamless deployment of a new version without downtime. It achieves this by gradually replacing the old pods with the new ones, ensuring a smooth transition and enabling easy rollback in case of issues.
What is a Git rebase used for?
- Combining or integrating branches
- Creating a new branch
- Inspecting changes made in a branch
- Undoing changes in the working directory
Git rebase is used for combining or integrating branches. It allows you to apply a sequence of commits from one branch onto another, helping to maintain a linear project history. This is particularly useful for keeping feature branches up to date with the latest changes in the main branch.
Which tool is often used to automate the building and testing stages in CI/CD pipelines?
- Docker
- Gradle
- Jenkins
- Travis CI
Jenkins is often used to automate the building and testing stages in CI/CD pipelines. It is an open-source automation server that supports building, deploying, and automating any project.
A well-designed logging system should provide _______.
- Log Rotation
- Encryption
- Anonymization
- All of the above
A well-designed logging system should provide log rotation to manage log file sizes, encryption for securing sensitive information, and anonymization to protect user privacy. Hence, all the options are essential features of a robust logging system.
A web application you're working on is vulnerable to SQL injection attacks. How would you mitigate this risk?
- All of the above
- Escaping user input
- Implement input validation
- Use parameterized queries
Mitigating SQL injection risks requires best practices like using parameterized queries, escaping user input, and implementing input validation. Parameterized queries are particularly effective in preventing SQL injection by separating data from SQL code.
What is the purpose of the HTTP PATCH method in RESTful APIs?
- Creates a new resource
- Deletes a resource
- Partially updates a resource
- Retrieves a resource
The HTTP PATCH method in RESTful APIs is used to partially update a resource. It applies partial modifications to a resource, making it suitable for updating specific fields.
Database _______ is the process of ensuring that data in a database remains accurate and consistent over time.
- Maintenance
- Normalization
- Optimization
- Security
Database maintenance is the process of ensuring that data in a database remains accurate and consistent over time. It involves tasks such as backups, performance monitoring, and data integrity checks.
In AWS, _______ is a service for scalable storage in the cloud.
- Amazon S3
- EC2
- Elastic Beanstalk
- Lambda
In AWS, Amazon S3 (Simple Storage Service) is a scalable storage service in the cloud. It allows users to store and retrieve any amount of data at any time. S3 is commonly used for backup, archiving, content distribution, and data storage for web applications.
What is the purpose of containerization in software development?
- All of the above
- Isolation
- Portability
- Standardization
Containerization in software development serves multiple purposes, including isolation of applications, standardization of deployment environments, and enhancing portability. Containers encapsulate applications and dependencies, making them consistent across various environments and easing the deployment process.
Which design pattern is used to define a family of algorithms, encapsulate each algorithm, and make them interchangeable?
- Command
- Decorator
- Observer
- Strategy
The Strategy design pattern is used to define a family of algorithms, encapsulate each algorithm, and make them interchangeable. It allows the client to choose the appropriate algorithm at runtime.