What does hoisting refer to in JavaScript variable declarations?
A). a. Declaring a variable multiple times
B). b. Initializing a variable before declaring
C). c. Moving variable declarations to the top
D). d. Using undeclared variables
What will console.log(a); output if a is declared outside a function but inside a block using let in JavaScript?
A). a. It will output the value of a
B). b. It will throw an error
C). c. It will output undefined
D). d. It
What keyword is used to declare variables in JavaScript?
A). a. var
B). b. const
C). c. let
D). d. def
What keyword is used to declare variables in JavaScript?
A). a. var
B). b. const
C). c. let
D). d. def
Which of the following variable names is valid in JavaScript?
A). a. my variable
B). b. _variable
C). c. 3variable
D). d. variable$
20 MCQ on Declaring (Creating) JavaScript Variables in 2000 words with example. in excel format with Question in Col A, Option A in Col B, Option B in col C, Option C in col D, Option D in col e, Right Answer in col f, Solution with explanation in col g without sno and options a,b,c,d and put all html tags in special container
A).
B).
C).
D).
What does hoisting refer to in JavaScript variable declarations?
A). a. Declaring a variable multiple times
B). b. Initializing a variable before declaring
C). c. Moving variable declarations to the top
D). d. Using undeclared variables
Which keyword is used to declare a variable that cannot be reassigned in JavaScript?
A). a. var
B). b. let
C). c. const
D). d. mutable
What is the purpose of using the const keyword in JavaScript?
A). a. To declare variables with function scope
B). b. To declare variables with block scope
C). c. To declare constants with immutable values
D). d. To declare objects in JavaScript
Which of the following statements is true about the let keyword in JavaScript?
A). a. Variables declared with let have global scope
B). b. Variables declared with let are block-scoped
C). c. let is used to declare constants
D). d. let is used to declare functions