Quiz 10

In Express.js, what does the "app.set" function allow you to do?

• a) Set up a new route

• b) Define a middleware

• c) Configure application settings

• d) Create a new instance of the Express framework

What is the "EventEmitter" class used for in Node.js?

• a) Handling user interface events

• b) Emitting and listening to events

• c) Creating event-driven widgets

• d) Defining HTTP routes

In Flutter, what is a "PageRoute"?

• a) A widget for creating routes

• b) A class for defining navigation routes

• c) A package for handling HTTP requests

• d) A built-in layout component

Which component of a CPU is responsible for managing memory operations?

• a) Arithmetic Logic Unit (ALU)

• b) Control Unit (CU)

• c) Memory Unit

• d) Input/Output Unit (IOU)

What is the role of a "system bus" in computer architecture?

• a) To connect the CPU to peripheral devices

• b) To manage data storage

• c) To control the clock speed

• d) To execute instructions

In Express.js, what does the "next" argument in a middleware function do?

• a) It passes control to the next middleware in line

• b) It sends a response to the client

• c) It terminates the request-response cycle

• d) It triggers an error

In React, what is the "virtual DOM"?

• a) A virtual representation of the CPU's processing unit

• b) A component that simulates network connections

• c) An in-memory representation of the actual DOM

• d) A module for managing user authentication

How can you update the state of a component in React?

• a) By directly modifying the state object

• b) By using the "setState" method

• c) By using the "props" object

• d) By reassigning values to state variables

In React, what is the purpose of the "useMemo" hook?

• a) To define the initial state of a component

• b) To optimize the performance of expensive calculations

• c) To handle user input events

• d) To manage component lifecycles

What is the purpose of the "propTypes" property in React?

• a) To specify the type of HTTP request to be used

• b) To define the required props for a component

• c) To manage state transitions

• d) To configure CSS styles for a component