What will be the output of the code above?
A). 30
B). 31
C). Error
D). Undefined
What does the const keyword signify in JavaScript?
A). Constant variable
B). Mutable variable
C). Global variable
D). Block-scoped variable
How can you declare a constant named PI with a value of 3.14 in JavaScript using const?
A). const PI = 3.14;
B). PI = 3.14;
C). let PI = 3.14;
D). var PI = 3.14;
Which statement about JavaScript's const is true?
A). const variables can be redeclared
B). const variables are globally scoped
C). const variables are mutable
D). const variables cannot be reassigned
What happens if you try to declare a const variable without initializing it immediately?
A). SyntaxError
B). ReferenceError
C). TypeError
D). No error, the variable remains undefined
Which of the following statements is true about constants declared using const?
A). They can be reassigned multiple times
B). They are hoisted to the top
C). They are mutable
D). They are immutable
Which keyword is used to declare block-scoped variables in JavaScript?
A). var
B). let
C). const
D). block
What will be logged to the console after executing the code above?
A). ['red', 'blue', 'green', 'yellow']
B). ['red', 'blue', 'green']
C). ['yellow']
D). Error
What will be the output of the code above?
A). 30
B). 31
C). TypeError
D). Undefined
Which of the following statements is true about block scope in JavaScript?
A). Variables declared with let have global scope
B). Variables declared with let have function scope
C). Variables declared with let are block-scoped
D). Variables declared with let are hoisted