Query optimization techniques can vary significantly depending on the _______ model used by the database system.

  • Concurrency
  • Data
  • Query language
  • Storage
Query optimization techniques can vary significantly depending on the query language model used by the database system. Different query languages may have distinct optimization strategies, affecting the overall performance of queries.

_______ allows developers to create and maintain documentation for their projects, making it easier for team members to understand the codebase.

  • Code Linting
  • Continuous Integration (CI)
  • Documentation Generator
  • Version Control System (VCS)
Documentation Generator allows developers to create and maintain documentation for their projects, making it easier for team members to understand the codebase. Clear documentation is crucial for code maintainability and knowledge transfer.

What is the purpose of continuous integration in the context of pull requests and code review?

  • Automatically Integrates Code Changes
  • Enhances Collaboration Among Developers
  • Ensures Code Quality through Automated Builds
  • Identifies and Fixes Bugs Early
Continuous Integration ensures code quality by automatically building and testing changes as soon as they are pushed. This helps catch and fix issues early, promoting collaboration and maintaining a reliable codebase.

In a project with a strict release schedule, a merge conflict arises just before a critical deadline. How would you prioritize resolving the conflict while minimizing disruption to the release timeline?

  • Delegate the conflict resolution to another team member.
  • Identify critical changes for the release, prioritize resolving conflicts related to those changes first, and communicate with the team about any potential delays.
  • Ignore the conflict until after the release, focusing on meeting the deadline.
  • Roll back all changes, releasing the previous version without the conflicting updates.
Prioritizing conflicts based on critical changes ensures that essential features are not compromised. Effective communication is crucial to manage expectations regarding potential delays.

In a pull request, you notice that a colleague has introduced a security vulnerability. How would you handle this issue to ensure the security of the codebase?

  • Approve the pull request and fix the vulnerability later
  • Comment on the pull request, highlighting the vulnerability, and suggest a fix
  • Share the concern privately with the colleague
  • Reject the pull request and discuss the issue with the team
Option d is the correct choice. Rejecting the pull request ensures that the vulnerability is not merged. Discussing it with the team promotes awareness and collaboration for a robust solution.

Which sorting algorithm has the best average-case time complexity?

  • BubbleSort
  • InsertionSort
  • QuickSort
  • SelectionSort
QuickSort typically has the best average-case time complexity among the given sorting algorithms. Its average-case performance is O(n log n), making it efficient for a wide range of scenarios. QuickSort utilizes a divide-and-conquer strategy to sort elements.

A critical component of your infrastructure failed unexpectedly. How would you use Infrastructure as Code to quickly recover and restore the system?

  • Manually troubleshoot the component
  • Redeploy the affected component using IaC scripts
  • Rollback to a previous state manually
  • Wait for the issue to resolve itself
In the event of a critical failure, Infrastructure as Code enables quick recovery by redeploying the affected component using pre-defined scripts. This allows for rapid and consistent restoration of the system to a known, stable state.

Which type of relationship is represented by a foreign key in a database?

  • Many-to-Many
  • Many-to-One
  • One-to-Many
  • One-to-One
A foreign key in a database represents a One-to-Many relationship. It signifies that the values in one column (or set of columns) correspond to values in another table's primary key column.

Authorization mechanisms often rely on defining access _______ for different user roles.

  • Keys
  • Permissions
  • Secrets
  • Tokens
Authorization mechanisms often rely on defining access permissions for different user roles. Permissions determine what actions or resources a user with a specific role can access.

What does SQL injection refer to in the context of security vulnerabilities?

  • Exploiting vulnerabilities in the SQL server
  • Forcing a user to reveal their SQL credentials
  • Injecting malicious code into a website's frontend
  • Manipulating a database using Structured Query Language
SQL injection refers to manipulating a database using Structured Query Language. It is a security vulnerability where an attacker inserts malicious SQL statements into input fields, potentially gaining unauthorized access to the database or causing data manipulation.