In a pull request, the _______ is responsible for reviewing and providing feedback on the proposed changes.
- Developer
- Merger
- Reviewer
- Team Lead
In a pull request, the Reviewer is responsible for reviewing and providing feedback on the proposed changes. This role ensures the quality and adherence to coding standards before merging.
The CSS pseudo-elements allow you to style _______ parts of an element.
- All
- Dynamic
- Specific
- Structural
The CSS pseudo-elements allow you to style Structural parts of an element. They enable you to style specific parts of an element, such as the first line or first letter.
Which tool is commonly used for version control in CI/CD pipelines?
- Docker
- Git
- Jenkins
- Maven
Git is commonly used for version control in CI/CD pipelines. It provides a distributed version control system that allows developers to track changes in their codebase efficiently.
What is an index in a relational database, and how does it improve performance?
- Algorithm for sorting data in a table
- Data structure that provides a quick look-up of rows based on column values
- Function to calculate the average of a column
- Unique constraint on a column
An index in a relational database is a data structure that provides a quick look-up of rows based on column values, improving the speed of data retrieval. It acts as a roadmap to locate specific data efficiently.
Which feature in Browser Developer Tools allows you to inspect and edit network requests and responses?
- Console panel
- Elements panel
- Network panel
- Sources panel
The "Network" panel in Browser Developer Tools enables the inspection and editing of network requests and responses. It's a crucial tool for debugging and optimizing web applications.
Which type of attack involves tricking a user into performing actions they did not intend to do?
- Cross-Site Scripting (XSS)
- Denial-of-Service (DoS)
- Man-in-the-Middle (MitM)
- Social Engineering
Social Engineering involves tricking users into performing actions they did not intend to do. This can include manipulation, deception, or impersonation to gain unauthorized access or information.
What is the primary key in a relational database?
- A key that can be NULL
- A key that is not unique
- A key that is shared among multiple tables
- A unique identifier for a record in a table
The primary key in a relational database is a unique identifier for a record in a table. It ensures the uniqueness of each record and is used for referencing data in other tables.
You're building a form validation script in JavaScript. How would you ensure that an email input field contains a valid email address before submitting the form?
- Using Regular Expressions: /^[^s@]+@[^s@]+.[^s@]+$/
- Checking for '@' and '.' occurrences
- Using a predefined list of valid email addresses
- Using validateEmail() function
To ensure that an email input field contains a valid email address in JavaScript, you can use regular expressions. The provided regex (/^[^s@]+@[^s@]+.[^s@]+$/) validates the basic structure of an email address. The correct option offers a robust and standard approach.
You are reviewing a pull request and notice that a team member has made changes to a critical part of the codebase without any documentation. How would you address this situation?
- Comment on the pull request, requesting documentation before approval
- Approve the pull request without documentation but address it in the team meeting
- Reject the pull request until documentation is provided
- Discuss it privately with the team member
Option c is the most appropriate. Documentation is crucial, especially for critical changes. Rejecting the pull request until documentation is provided ensures comprehensive understanding and accountability.
What is Docker used for in containerization?
- Containerization
- DevOps
- Orchestration
- Virtualization
Docker is primarily used for containerization. It allows developers to package applications and their dependencies into containers, ensuring consistency across different environments and simplifying deployment. Containerization, as facilitated by Docker, enhances scalability, portability, and resource efficiency.
What are some techniques for optimizing frontend performance in a single-page application (SPA) built with frameworks like React or Angular?
- Code Splitting
- Inline Styles
- Monolithic Architecture
- Relational Databases
Techniques for optimizing frontend performance in SPAs include Code Splitting, which involves breaking the code into smaller chunks and loading only what is necessary for a particular view. This reduces initial loading times and improves the overall user experience.
In a software project where you need to ensure that only one instance of a database connection manager is used throughout the application, which design pattern would you employ?
- Decorator
- Factory Method
- Observer
- Singleton
The correct design pattern for ensuring a single instance of a class is the Singleton pattern. This pattern restricts the instantiation of a class to one object and provides a global point of access to that instance. It's commonly used for scenarios like managing database connections to maintain consistency across the application.