JavaScript Questions and Answers Latest Version Already Graded A

JavaScript Questions and Answers
Latest Version Already Graded A
What will `console.log("5" - 2);` output?


✔✔A) 3


B) "52"

C) 5-2

D) Error




Which of the following is a correct way to declare an arrow function?


✔✔A) const myFunc = () => {};


B) const myFunc = => {};

C) function => myFunc() {};

D) arrow function myFunc() {};




How do you check if an array contains a specific value?

A) array.find(value)


✔✔B) array.includes(value)


C) array.has(value)

1

,D) array.contains(value)




Which operator is used for logical AND in JavaScript?

A) &


✔✔B) &&


C) AND

D) ||




What will `console.log(0 == false);` return?


✔✔A) true


B) false

C) undefined

D) NaN




How do you generate a random number between 0 and 1 in JavaScript?


✔✔A) Math.random()


B) Math.rand()

C) random()


2

, D) generateRandom()




Which method is used to execute a function repeatedly at a fixed time interval?

A) repeat()

B) setTimeout()


✔✔C) setInterval()


D) loopFunction()




What does `JSON.stringify(obj)` do?

A) Parses a JSON string


✔✔B) Converts an object to a JSON string


C) Converts JSON into an array

D) Saves JSON to local storage




What will `console.log(typeof []);` output?

A) array


✔✔B) object


C) list


3