Answer & Solution
Answer: Option B
Solution:
In JavaScript, a variable's data type is determined at runtime and can change during execution.
1.
What does it mean that JavaScript is dynamically typed?
2.
What is the result of the following code: let x = 5; x = "hello"; console.log(typeof x);?
3.
Which operator is used to determine the type of a variable in JavaScript?
4.
Given the code: let y = 10; y = true;, what is the type of y after execution?
5.
What will typeof NaN return in JavaScript?
6.
What is the initial type of a variable declared with let a;?
7.
Which type conversion happens automatically in the expression 3 + "5"?
8.
What does the parseInt function do in JavaScript?
9.
What will be the result of the following code: let z = "123"; z = Number(z); console.log(typeof z);?
10.
Which of the following values is considered falsy in JavaScript?