What is an Aggregate Root in the context of Repository Pattern?
- A boundary object around a group of objects, that ensures the consistency of the data
- A special type of object that implements data access logic
- An object that is the only object that should be accessed directly, while all other objects are accessed through it
- An object that is the parent of all other objects in the aggregate and controls the consistency of all objects in the aggregate
An Aggregate Root in the context of Repository Pattern is a boundary object around a group of objects, which ensures the consistency of the data. It is the parent of all other objects in the aggregate and controls the consistency of all objects in the aggregate.
What is the purpose of the Interpreter pattern?
- To create complex objects step by step, using a builder object to abstract the process of creating the object
- To define a grammatical representation for a language and provide an interpreter to deal with this grammar
- To provide a common interface for a group of related classes
- To provide a way to pass requests along a dynamic chain of receivers until one of them handles the request
The Interpreter pattern defines a grammatical representation for a language and provides an interpreter to deal with this grammar
What are the entities of Service Locator pattern?
- Cache, Client, Service, Service Locator, and InitialContext
- Client, Service Locator, Service, InitialContext, and Cache
- InitialContext, Cache, Client, Service Locator, and Service
- Service, InitialContext, Service Locator, Cache, and Client
The entities of the Service Locator pattern are: Service, InitialContext, Service Locator, Cache, and Client. The Service represents the service being located. The InitialContext is responsible for performing the actual lookup of the service. The Service Locator acts as a cache, keeping track of services that have already been looked up. The Cache stores references to services that have already been looked up. The Client is the entity that requires access to the service.
What is the difference between the Flyweight and Singleton patterns?
- None of the above
- The Flyweight and Singleton patterns are the same
- The Flyweight pattern conserves memory by sharing common data among objects, while the Singleton pattern ensures that only one instance of a class exists in the system
- The Flyweight pattern ensures that only one instance of a class exists in the system, while the Flyweight pattern conserves memory by sharing common data among objects
The Flyweight pattern conserves memory by sharing common data among objects, while the Singleton pattern ensures that only one instance of a class exists in the system
What is State pattern?
- A behavioral design pattern that allows an object to alter its behavior when its internal state changes. The object appears to change its class, but the change is implemented as a state transition within the same object. This allows for a cleaner, more maintainable implementation of state-dependent behavior.
- A creational design pattern that is used to create objects from a common interface or base class, but with different underlying implementations depending on the specific context.
- A design pattern that focuses on managing the flow of control within an application, with the goal of improving modularity and maintainability.
- A structural design pattern that uses inheritance to compose complex objects from simple objects, with the goal of reducing coupling and increasing cohesion between the objects.
The State pattern is a behavioral design pattern that allows an object to alter its behavior when its internal state changes. The change in behavior is implemented as a state transition within the same object, rather than as a change in class. This results in a cleaner, more maintainable implementation of state-dependent behavior.
The component in IoT architecture responsible for gathering data from the environment is:
- Actuator
- Cloud Server
- Gateway
- Sensor
Sensors are the components in IoT architecture responsible for gathering data from the environment. They capture data from the physical world, such as temperature, humidity, or motion, and transmit it to other IoT components for processing and analysis.
In smart cities, ________ sensors help manage and optimize traffic flow.
- Biometric
- Environmental
- Temperature
- Traffic
In smart city applications, traffic sensors play a crucial role in collecting real-time traffic data, which is used to manage and optimize traffic flow, reduce congestion, and enhance overall transportation efficiency.
When an IoT device uses "Wake on Demand" functionality, it means:
- The device never wakes up
- The device wakes up at fixed intervals
- The device wakes up only when it is powered on
- The device wakes up when an external stimulus triggers it
"Wake on Demand" functionality in IoT devices means that the device remains in a low-power or sleep state until an external stimulus or event triggers it to wake up. This approach helps save power and resources by ensuring that the device is only active when necessary, making it an energy-efficient strategy for IoT applications.
RTOS stands for:
- Real-Time Operating System
- Regular Time Operating System
- Reliable Task Operating System
- Robust Text Operating System
RTOS stands for "Real-Time Operating System." It is an operating system designed for real-time applications where tasks have specific timing constraints.
Which of the following is a primary layer of the IoT architecture?
- Application Layer
- Data Link Layer
- Physical Layer
- Transport Layer
The primary layers of IoT architecture typically include the Application Layer, which is responsible for interacting with end-users and applications. It's where data is processed and used for various IoT applications.
A startup is developing a smart wearable device and is looking for a lightweight and efficient programming language. The team is likely to opt for:
- Python
- Java
- C
- Rust
Rust is known for its lightweight and efficient characteristics, making it a suitable choice for resource-constrained devices like smart wearables. While Python, Java, and C are widely used, they may not be as efficient on such devices.
The concept of "Right to be Forgotten," especially in the realm of IoT, is derived from ________.
- European Union (EU) Regulations
- Internet Ethics
- IoT Protocols
- Social Media Trends
The concept of "Right to be Forgotten," especially in the realm of IoT, is derived from "European Union (EU) Regulations." EU regulations emphasize individuals' right to have their personal data erased, which impacts IoT data privacy.