Blog

Question 1:  What is the Event Loop mainly responsible for?

(A) Executing CSS rules

(B) Managing call stack and queues

(C) Storing variables

Question 2:  Which queue has the highest execution priority?

(A) Microtask Queue

(B) Callback Queue

(C) Rendering Queue

Question 3:  Which of these goes into the Microtask Queue?

(A) setTimeout callback

(B) Promise.then callback

(C) setInterval callback

Question 4:  When does the Event Loop check the Microtask Queue?

(A) After each task in call stack

(B) Only once at the start

(C) After each rendering cycle

Question 5:  Which queue is used for setTimeout and setInterval callbacks?

(A) Microtask Queue

(B) Callback Queue

(C) Priority Queue

Question 6:  What happens if new microtasks are added while processing existing ones?

(A) They are ignored

(B) They are executed before moving to next queue

(C) They wait for the next cycle

Question 7:  Which feature helps JavaScript handle async operations despite being single-threaded?

(A) Event Loop

(B) DOM

(C) CSSOM

Question 8:  Which runs first if both Promise.then and setTimeout are scheduled?

(A) Promise.then callback

(B) setTimeout callback

(C) Both run at same time

Question 9:  Which queue handles MutationObserver callbacks?

(A) Callback Queue

(B) Microtask Queue

(C) Animation Frame Queue

Question 10:  In which order are tasks executed?

(A) Call stack then Microtask Queue then Callback Queue

(B) Microtask Queue then Call stack then Callback Queue

(C) Callback Queue then Microtask Queue then Call stack