The _______ design pattern defines a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.
- Command
- Observer
- Prototype
- Singleton
The Observer design pattern defines a one-to-many dependency between objects. When the state of one object changes, all its dependents (observers) are notified and updated automatically.
What is the role of a security token in the context of authentication?
- Encrypt communication between client and server
- Generate random numbers
- Store user preferences
- Verify the identity of a user
A security token in authentication is used to verify the identity of a user. It typically contains information such as user credentials or a reference to the user's identity stored on a secure server, ensuring secure access to resources.
What is the purpose of logging in software development?
- Enhance code readability
- Record and analyze program behavior
- Replace debugging
- Speed up program execution
The purpose of logging in software development is to record and analyze program behavior. It helps developers understand how their code is behaving in different scenarios.
In Kubernetes, a _______ is a group of one or more containers, with shared storage/network resources, and a specification for how to run the containers.
- Deployment
- Node
- Pod
- Service
In Kubernetes, a "Pod" is a group of one or more containers that share the same network and storage resources. It provides a way to organize and manage containers within the Kubernetes environment.
Explain the concept of polymorphism in OOP with an example.
- It allows a class to inherit from multiple classes
- It is the process of converting objects into different types
- It is used for encapsulation in OOP
- It refers to the ability of a class to provide different implementations for the same method
Polymorphism in OOP refers to the ability of a class to provide different implementations for the same method. For example, method overloading and method overriding are forms of polymorphism. Method overloading involves defining multiple methods with the same name but different parameters in the same class. Method overriding occurs when a derived class provides a specific implementation for a method already defined in its base class. This flexibility allows for more versatile and readable code.
A global news website wants to reduce load times for its international audience. How would you recommend implementing caching to achieve this goal?
- Client-side caching with local storage
- Database query result caching
- Edge caching with CDN nodes in various geographical locations
- Server-side caching using technologies like Varnish
To reduce load times for international audiences, edge caching with CDN nodes strategically placed globally is effective. It ensures that content is served from a server closer to the user, minimizing latency.
What is the command used to clone a repository from a remote server to your local machine?
- git clone
- git commit
- git pull
- git push
The command used to clone a repository from a remote server to your local machine is git clone. This command creates a copy of the repository on your local system, allowing you to work on the codebase.
What does CSS stand for in the context of responsive design?
- Cascading Style Sheets
- Central Style Sheets
- Computer Style Sheets
- Creative Style Sheets
In the context of responsive design, CSS stands for Cascading Style Sheets. CSS is used to control the presentation and layout of web pages, playing a crucial role in creating responsive designs.
_______ is a method used to traverse a graph or tree data structure.
- Breadth-First Search (BFS)
- Depth-First Search (DFS)
- Dijkstra's Algorithm
- QuickSort
The method used to traverse a graph or tree data structure is Depth-First Search (DFS). It explores as far as possible along each branch before backtracking.
Security _______ involve scanning systems for vulnerabilities and weaknesses.
- Assessments
- Audits
- Breaches
- Incidents
Security assessments involve scanning systems for vulnerabilities and weaknesses. This proactive approach helps identify potential security risks and allows organizations to implement measures to strengthen their overall security posture.