What does the const keyword signify in JavaScript?
A). Constant variable
B). Mutable variable
C). Global variable
D). Block-scoped variable
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
What will happen when you try to execute this code?
A). 14 will be logged to the console
B). 14159 will be logged to the console
C). SyntaxError will occur
D). TypeError will occur
In JavaScript, const variables are not hoiste What does this mean?
A). They are hoisted to the top of the block
B). They cannot be used before declaration
C). They are accessible in nested scopes
D). They are block-scoped variables
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
Which of the following is NOT an example of a block in JavaScript?
A). Function body
B). if statement body
C). while loop body
D). Object literal
What is the benefit of using const over var in JavaScript?
A). const variables have function scope
B). const variables are hoisted to the top
C). const variables prevent accidental reassignments
D). const variables can be used anywhere
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 happens if you try to reassign a value to a constant declared using const?
A). SyntaxError
B). TypeError
C). ReferenceError
D). No error, value is 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