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Question 1:  What is a callback function in JavaScript?

(A) A function that is called immediately

(B) A function passed into another function as an argument

(C) A function that returns another function

Question 2:  Which method is commonly used to handle asynchronous operations in JavaScript?

(A) loop()

(B) callback()

(C) setTimeout()

Question 3:  What does asynchronous programming allow in JavaScript?

(A) Blocking the main thread

(B) Executing code sequentially

(C) Running tasks without blocking the main thread

Question 4:  In JavaScript, which of the following is asynchronous by nature?

(A) for loop

(B) setInterval

(C) if-else statement

Question 5:  What is the purpose of the setTimeout() function in JavaScript?

(A) Execute code repeatedly

(B) Delay code execution

(C) Stop the execution

Question 6:  Which keyword is used to define an asynchronous function in JavaScript?

(A) await

(B) async

(C) defer

Question 7:  What will happen if a callback is not handled properly?

(A) Program runs faster

(B) Callback hell or pyramid of doom

(C) It gives a syntax error

Question 8:  What does the ‘await’ keyword do in an async function?

(A) Returns a callback

(B) Pauses the function execution until the promise is resolved

(C) Calls the function again

Question 9:  What is a common use of callbacks in JavaScript?

(A) Error handling

(B) Declaring variables

(C) Looping

Question 10:  Which of the following is an example of an asynchronous operation?

(A) console.log()

(B) reading a file using fs.readFile()

(C) variable assignment