What is the outcome of console.log(typeof x); if x is declared but not initialized in JavaScript?
A). a. Undefined
B). b. Null
C). c. Error
D). d. Object
Which of the following variable names is valid in JavaScript?
A). a. my variable
B). b. _variable
C). c. 3variable
D). d. variable$
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 happen if you try to reassign a value to a constant declared with const in JavaScript?
A). a. It will throw an error
B). b. It will silently ignore the assignment
C). c. It will convert the variable to let
D). d. It will convert the variable to var
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 variable names is valid in JavaScript?
A). a. my variable
B). b. _variable
C). c. 3variable
D). d. variable$
What keyword is used to declare variables in JavaScript?
A). a. var
B). b. const
C). c. let
D). d. def
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
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 is the outcome of console.log(typeof x); if x is declared but not initialized in JavaScript?
A). a. Undefined
B). b. Null
C). c. Error
D). d. Object