What are the drawbacks of using caching in web applications and how can they be mitigated?
- Data inconsistency issues
- Increased load on the database
- Limited storage capacity
- Security vulnerabilities
One drawback of caching is an increased load on the database. Mitigation involves strategies like implementing a cache eviction policy or using distributed caching systems.
The Git command "git stash" is used to temporarily _______ changes in the working directory.
- Remove
- Stash
- Suspend
- Undo
The Git command "git stash" is used to temporarily stash changes in the working directory. It allows developers to save changes without committing them, making it easy to switch to another branch or address an urgent issue.
The try-catch-finally block in Java is used for _______.
- Database Connection
- Exception Handling
- File Input/Output
- Looping
The try-catch-finally block in Java is used for handling exceptions. It allows developers to catch and handle exceptions that may occur during the execution of code in the try block.
In Gitflow, the _______ branch is used for integrating completed features into the main development branch.
- develop
- feature
- hotfix
- release
In Gitflow, the develop branch is used for integrating completed features into the main development branch. It serves as the integration branch where features from individual branches are merged before release.
In the _______ phase, the software is deployed to the production environment for end-users to access and use.
- Deployment
- Development
- Planning
- Testing
In the Deployment phase, the software is deployed to the production environment, making it accessible for end-users. This phase marks the transition from development to the operational phase of the software life cycle.
Cassandra uses a _______ data model.
- Wide-column
- Relational
- Document
- Key-value
Cassandra uses a Wide-column data model. It is designed for handling and querying large amounts of data across distributed commodity servers. The correct option represents the data model used by Cassandra.
What are the main branches in Gitflow?
- Develop and Release
- Feature and Bugfix
- Master and Develop
- Master and Feature
The main branches in Gitflow are "Master" and "Develop." The Master branch represents the stable production version, while the Develop branch is used for ongoing development. Other branches, such as feature and bugfix branches, stem from Develop.
In Git, when does a merge conflict typically occur?
- Only in branches with the same name
- Only in complex projects with many contributors
- Randomly during the merge process
- When there are conflicting changes between the branches being merged
A merge conflict in Git typically occurs when there are conflicting changes in the branches being merged. Conflicts can arise when changes in one branch overlap with changes in another branch.
How does Gitflow handle hotfixes compared to GitHub Flow?
- Dedicated Hotfix Branch, Immediate Deployment, Merge to Master and Develop
- Feature Branch for Hotfix, Pull Requests, Automatic Merging
- Forking for Hotfix, Patch Branch, Manual Merging
- No Hotfix Branch, Continuous Deployment, Direct Merge to Master
Gitflow handles hotfixes by creating a dedicated hotfix branch, allowing for immediate deployment, and merging changes both to the master and develop branches, ensuring consistency.
In pessimistic concurrency control, transactions acquire _______ on data items to prevent other transactions from accessing them simultaneously.
- Indexes
- Locks
- Permissions
- Timestamps
In pessimistic concurrency control, transactions acquire locks on data items to prevent other transactions from accessing them simultaneously. This helps maintain data consistency by allowing only one transaction to modify a data item at a time.