What is the result of null === undefined?
A). 1
B). 0
C). Error
D). NaN
Which operator checks both value and type for equality in JavaScript?
A). ==
B). !=
C). ===
D). !==
Which method can be used to convert a string to a number in JavaScript?
A). parseInt()
B). toString()
C). toNumber()
D). parseStr()
What is the output of '5' - 3?
A). 2
B). 2
C). 53
D). Error
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;
What is the data type of 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Object
What is the result of null == undefined?
A). 1
B). 0
C). Error
D). NaN
Which of the following is a falsy value in JavaScript?
A). 0
B).
C). null
D). All of the above
What is the data type of an array in JavaScript?
A). Array
B). Object
C). Collection
D). List