Answer & Solution
Answer: Option B
Solution:
In JavaScript, a variable's data type is determined at runtime and can change during execution.
Q
What does it mean that JavaScript is dynamically typed?
Related Questions on Average
What will be the result of the following code: let z = '123'; z = Number(z); console.log(typeof z);?
A). string
B). number
C). undefined
D). boolean
What is the initial type of a variable declared with let a;?
A). null
B). number
C). undefined
D). object
In JavaScript, what will be the type of a variable x after x = 5 + true;?
A). number
B). string
C). boolean
D). undefined
What does the isNaN function do?
A). Checks if a value is not a number
B). Converts a value to a number
C). Checks if a value is a number
D). Converts a value to NaN
What will typeof NaN return in JavaScript?
A). number
B). NaN
C). undefined
D). object
What is the type of the value returned by parseFloat('3.14abc')?
A). number
B). string
C). NaN
D). undefined
What is the result of typeof [] in JavaScript?
A). array
B). object
C). list
D). undefined
What will be the result of typeof function() {} in JavaScript?
A). function
B). object
C). undefined
D). method
Given the code: let y = 10; y = true;, what is the type of y after execution?
A). number
B). boolean
C). string
D). object
What does the parseInt function do in JavaScript?
A). Converts a number to a string
B). Converts a string to an integer
C). Converts a boolean to a number
D). Converts an array to a number