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JavaScript from Zero to Superhero

Quiz for Part II: Intermediate JavaScript

Questions

This quiz is designed to test your understanding of the concepts discussed in Part II: Intermediate JavaScript, covering Advanced Functions, Object-Oriented JavaScript, Web APIs and Interfaces, and Error Handling and Testing. Each question reflects key topics and principles that are essential for mastering Intermediate JavaScript skills.

Question 1: Advanced Functions

What is the primary benefit of using arrow functions in JavaScript?

A) They have their own this context.
B) They cannot contain asynchronous code.
C) They do not have their own this context.
D) They are faster than traditional functions.

Question 2: Object-Oriented JavaScript

Which statement about the prototype chain in JavaScript is true?

A) JavaScript objects directly contain all methods of their prototype.
B) Changes to an object’s prototype affect only that instance.
C) An object’s prototype defines methods that can be shared by all instances of that object.
D) Prototypes are typically used in JavaScript to prevent inheritance.

Question 3: Web APIs and Interfaces

Which API is used to store data that should persist across sessions in a web application?

A) sessionStorage
B) localStorage
C) fetch()
D) XMLHttpRequest

Question 4: Error Handling and Testing

What does the finally block in a try...catch...finally statement do?

A) It is executed if an error occurs in the try block.
B) It is executed after the catch block, but only if no errors were caught.
C) It is executed regardless of whether an error was thrown or caught.
D) It contains the cleanup code that runs depending on the error type.

Question 5: Advanced Functions

In JavaScript, what is a closure?

A) A type of function that can execute asynchronously.
B) A combination of a function bundled together with references to its surrounding state.
C) The process of combining several functions into one.
D) A function that is returned by another function.

Question 6: Object-Oriented JavaScript

Which keyword is used to create a class inheritance in JavaScript?

A) inherits
B) extends
C) prototype
D) super

Question 7: Web APIs and Interfaces

What is the primary use of the fetch() API?

A) To manipulate the browser’s history.
B) To make network requests and handle responses.
C) To store data in the browser that disappears after the session ends.
D) To send data to local storage.

Question 8: Error Handling and Testing

What is the purpose of throwing custom errors in JavaScript?

A) To break the application deliberately.
B) To enhance the debugging process by providing clearer errors.
C) To slow down the execution of functions.
D) To bypass the need for external error handling libraries.

Questions

This quiz is designed to test your understanding of the concepts discussed in Part II: Intermediate JavaScript, covering Advanced Functions, Object-Oriented JavaScript, Web APIs and Interfaces, and Error Handling and Testing. Each question reflects key topics and principles that are essential for mastering Intermediate JavaScript skills.

Question 1: Advanced Functions

What is the primary benefit of using arrow functions in JavaScript?

A) They have their own this context.
B) They cannot contain asynchronous code.
C) They do not have their own this context.
D) They are faster than traditional functions.

Question 2: Object-Oriented JavaScript

Which statement about the prototype chain in JavaScript is true?

A) JavaScript objects directly contain all methods of their prototype.
B) Changes to an object’s prototype affect only that instance.
C) An object’s prototype defines methods that can be shared by all instances of that object.
D) Prototypes are typically used in JavaScript to prevent inheritance.

Question 3: Web APIs and Interfaces

Which API is used to store data that should persist across sessions in a web application?

A) sessionStorage
B) localStorage
C) fetch()
D) XMLHttpRequest

Question 4: Error Handling and Testing

What does the finally block in a try...catch...finally statement do?

A) It is executed if an error occurs in the try block.
B) It is executed after the catch block, but only if no errors were caught.
C) It is executed regardless of whether an error was thrown or caught.
D) It contains the cleanup code that runs depending on the error type.

Question 5: Advanced Functions

In JavaScript, what is a closure?

A) A type of function that can execute asynchronously.
B) A combination of a function bundled together with references to its surrounding state.
C) The process of combining several functions into one.
D) A function that is returned by another function.

Question 6: Object-Oriented JavaScript

Which keyword is used to create a class inheritance in JavaScript?

A) inherits
B) extends
C) prototype
D) super

Question 7: Web APIs and Interfaces

What is the primary use of the fetch() API?

A) To manipulate the browser’s history.
B) To make network requests and handle responses.
C) To store data in the browser that disappears after the session ends.
D) To send data to local storage.

Question 8: Error Handling and Testing

What is the purpose of throwing custom errors in JavaScript?

A) To break the application deliberately.
B) To enhance the debugging process by providing clearer errors.
C) To slow down the execution of functions.
D) To bypass the need for external error handling libraries.

Questions

This quiz is designed to test your understanding of the concepts discussed in Part II: Intermediate JavaScript, covering Advanced Functions, Object-Oriented JavaScript, Web APIs and Interfaces, and Error Handling and Testing. Each question reflects key topics and principles that are essential for mastering Intermediate JavaScript skills.

Question 1: Advanced Functions

What is the primary benefit of using arrow functions in JavaScript?

A) They have their own this context.
B) They cannot contain asynchronous code.
C) They do not have their own this context.
D) They are faster than traditional functions.

Question 2: Object-Oriented JavaScript

Which statement about the prototype chain in JavaScript is true?

A) JavaScript objects directly contain all methods of their prototype.
B) Changes to an object’s prototype affect only that instance.
C) An object’s prototype defines methods that can be shared by all instances of that object.
D) Prototypes are typically used in JavaScript to prevent inheritance.

Question 3: Web APIs and Interfaces

Which API is used to store data that should persist across sessions in a web application?

A) sessionStorage
B) localStorage
C) fetch()
D) XMLHttpRequest

Question 4: Error Handling and Testing

What does the finally block in a try...catch...finally statement do?

A) It is executed if an error occurs in the try block.
B) It is executed after the catch block, but only if no errors were caught.
C) It is executed regardless of whether an error was thrown or caught.
D) It contains the cleanup code that runs depending on the error type.

Question 5: Advanced Functions

In JavaScript, what is a closure?

A) A type of function that can execute asynchronously.
B) A combination of a function bundled together with references to its surrounding state.
C) The process of combining several functions into one.
D) A function that is returned by another function.

Question 6: Object-Oriented JavaScript

Which keyword is used to create a class inheritance in JavaScript?

A) inherits
B) extends
C) prototype
D) super

Question 7: Web APIs and Interfaces

What is the primary use of the fetch() API?

A) To manipulate the browser’s history.
B) To make network requests and handle responses.
C) To store data in the browser that disappears after the session ends.
D) To send data to local storage.

Question 8: Error Handling and Testing

What is the purpose of throwing custom errors in JavaScript?

A) To break the application deliberately.
B) To enhance the debugging process by providing clearer errors.
C) To slow down the execution of functions.
D) To bypass the need for external error handling libraries.

Questions

This quiz is designed to test your understanding of the concepts discussed in Part II: Intermediate JavaScript, covering Advanced Functions, Object-Oriented JavaScript, Web APIs and Interfaces, and Error Handling and Testing. Each question reflects key topics and principles that are essential for mastering Intermediate JavaScript skills.

Question 1: Advanced Functions

What is the primary benefit of using arrow functions in JavaScript?

A) They have their own this context.
B) They cannot contain asynchronous code.
C) They do not have their own this context.
D) They are faster than traditional functions.

Question 2: Object-Oriented JavaScript

Which statement about the prototype chain in JavaScript is true?

A) JavaScript objects directly contain all methods of their prototype.
B) Changes to an object’s prototype affect only that instance.
C) An object’s prototype defines methods that can be shared by all instances of that object.
D) Prototypes are typically used in JavaScript to prevent inheritance.

Question 3: Web APIs and Interfaces

Which API is used to store data that should persist across sessions in a web application?

A) sessionStorage
B) localStorage
C) fetch()
D) XMLHttpRequest

Question 4: Error Handling and Testing

What does the finally block in a try...catch...finally statement do?

A) It is executed if an error occurs in the try block.
B) It is executed after the catch block, but only if no errors were caught.
C) It is executed regardless of whether an error was thrown or caught.
D) It contains the cleanup code that runs depending on the error type.

Question 5: Advanced Functions

In JavaScript, what is a closure?

A) A type of function that can execute asynchronously.
B) A combination of a function bundled together with references to its surrounding state.
C) The process of combining several functions into one.
D) A function that is returned by another function.

Question 6: Object-Oriented JavaScript

Which keyword is used to create a class inheritance in JavaScript?

A) inherits
B) extends
C) prototype
D) super

Question 7: Web APIs and Interfaces

What is the primary use of the fetch() API?

A) To manipulate the browser’s history.
B) To make network requests and handle responses.
C) To store data in the browser that disappears after the session ends.
D) To send data to local storage.

Question 8: Error Handling and Testing

What is the purpose of throwing custom errors in JavaScript?

A) To break the application deliberately.
B) To enhance the debugging process by providing clearer errors.
C) To slow down the execution of functions.
D) To bypass the need for external error handling libraries.