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 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
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$
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
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 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
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
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