The _______ design pattern is used to define an interface for creating an object, but let subclasses alter the type of objects that will be created.
- Abstract Factory
- Builder
- Factory
- Prototype
The Factory design pattern is used to define an interface for creating an object, but let subclasses alter the type of objects that will be created. It provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.
What does API stand for in RESTful APIs?
- Advanced Programming Interface
- Application Programming Interface
- Application Protocol Interface
- Automated Programming Interface
API stands for Application Programming Interface. It is a set of rules and tools that allows different software applications to communicate with each other. In the context of RESTful APIs, it facilitates communication between clients and servers.
Which factors should be considered during query optimization to improve performance?
- Data encryption and security measures
- Indexing, table structure, and join conditions
- Query length, formatting, and indentation
- Server capacity and network speed
During query optimization, factors like indexing, table structure, and join conditions play a crucial role in improving performance. Optimizing these aspects enhances the efficiency of data retrieval and processing.
What is the difference between authentication and authorization?
- Authentication and authorization are interchangeable terms referring to the same process.
- Authentication confirms user identity, while authorization ensures the confidentiality and integrity of user data.
- Authentication deals with user permissions, whereas authorization deals with user identification.
- Authentication verifies the identity of a user, confirming if they are who they claim to be. Authorization, on the other hand, determines what actions a user is allowed to perform after being authenticated.
Authentication and authorization are distinct processes. Authentication validates the user's identity, while authorization governs the access and actions a user can perform post-authentication.
Vue.js uses a _______ pattern for managing state and data binding.
- Flux
- MVVM
- Observer
- Singleton
Vue.js uses a MVVM (Model-View-ViewModel) pattern for managing state and data binding. This pattern helps in organizing and structuring code in Vue.js applications.
How does Kubernetes handle service discovery and load balancing?
- Manually configuring each service individually
- Relying on external tools not related to Kubernetes
- Through built-in mechanisms like kube-dns and kube-proxy
- Using static IP addresses
Kubernetes handles service discovery and load balancing through built-in mechanisms like kube-dns and kube-proxy. These components automatically manage DNS for the cluster and ensure that traffic is distributed evenly among the available instances of a service.
You have an array of numbers and you need to find the maximum value. How would you accomplish this using JavaScript?
- Math.max(...array)
- array.max()
- Math.maximum(array)
- maxValue(array)
To find the maximum value in an array in JavaScript, you can use the spread operator (...) along with Math.max(). This allows you to find the maximum value easily. The correct option is a concise and common approach.
Which metric is typically used to measure system performance in monitoring tools?
- CPU Utilization
- Disk Space
- Memory Usage
- Network Latency
CPU Utilization is a crucial metric for measuring system performance. It reflects the percentage of time the CPU spends on executing instructions and is a key indicator of system health. Monitoring tools often use this metric to identify potential bottlenecks or performance issues.
Regularly updating software helps protect against known _______ vulnerabilities.
- Database
- Hardware
- Network
- Software
Regularly updating software helps protect against known software vulnerabilities. Software updates often include patches that address security vulnerabilities, reducing the risk of exploitation by malicious entities.
How does the concept of abstraction apply in Object-Oriented Programming?
- Abstraction allows hiding implementation details while showing the essential features of a system.
- Abstraction is not applicable in Object-Oriented Programming.
- Abstraction prevents code from being reused.
- Abstraction simplifies code by removing unnecessary details.
Abstraction in Object-Oriented Programming refers to the concept of simplifying complex systems by hiding unnecessary details while showing only the essential features of objects. It allows for managing complexity by focusing on what an object does rather than how it does it.