Answer & Solution
Answer: Option C
Solution:
Hoisting is the behavior where variable and function declarations are moved to the top of their containing scope during the compile phase.
Q
What is hoisting in JavaScript?
Related Questions on Average
Which of the following is NOT a valid variable name in JavaScript?
A). myVar
B). $myVar
C). _myVar
D). 123myVar
Which of the following is correct about variable scope in JavaScript?
A). var is block-scoped
B). let is function-scoped
C). const is block-scoped
D). All variables are global
Which of the following is a valid variable name in JavaScript?
A). 2name
B). _name
C). #name
D).
Which of the following is true about variable naming conventions in JavaScript?
A). Variable names can start with a number
B). Variable names are case-insensitive
C). Variable names can include spaces
D). Variable names are case-sensitive
Which keyword is used to declare a variable in JavaScript?
A). var
B). let
C). const
D). All of the above
What will be the output of the following code?
const a = 10; a = 20; console.log(a);
A). 10
B). 20
C). Error
D). undefined
Which of the following is true about 'const' variables in JavaScript?
A). They can be redeclared
B). They cannot be reassigned
C). They can be reassigned
D). They are always undefined
Which keyword should be used to declare a block-scoped variable?
A). var
B). let
C). const
D). Both let and const
Which of the following will cause an error?
A). let a = 10; a = 20;
B). const a = 10; a = 20;
C). var a = 10; a = 20;
D). None of the above
Can you reassign a value to a variable declared with let?
A). Yes
B). No
C). Only in strict mode
D). Only inside a block