What is the data type of an array in JavaScript?
A). Array
B). Object
C). Collection
D). List
Which of the following is not a primitive data type in JavaScript?
A). String
B). Number
C). Object
D). Boolean
How do you declare a variable with an undefined value?
A). let x;
B). let x = '';
C). let x = 0;
D). let x = null;
Which of the following is a falsy value in JavaScript?
A). 0
B).
C). null
D). All of the above
What is the result of typeof Symbol('id')?
A). symbol
B). object
C). string
D). undefined
What is the result of typeof undefined?
A). undefined
B). null
C). object
D). number
Which function can convert a number to a string in JavaScript?
A). toString()
B). parseInt()
C). String()
D). Number()
What is the output of '5' + 3?
A). 8
B). 53
C). 8
D). Error
What will typeof [1, 2, 3] return?
A). array
B). object
C). number
D). list
Which symbol is used to denote a string template literal?
A). ''
B).
C). ``
D). {}