Modern JavaScript from the Beginning - Second Edition - Section Introduction-Variables, Data Types and More

This video tutorial introduces the basics of JavaScript, starting with console usage and variable setting. It delves into data types, distinguishing between primitive and reference types, and covers type conversion and coercion. The tutorial also explores operators, math and date objects, and methods for strings and numbers. Finally, it provides an overview of the JavaScript sandbox resources for the course.

What is the primary difference between 'let' and 'const' in JavaScript?

• 'let' is block-scoped, 'const' is function-scoped

• 'let' is a newer version of 'var', 'const' is not

• 'let' can be reassigned, 'const' cannot be reassigned

• 'let' is used for constants, 'const' is used for variables

Which of the following is a primitive data type in JavaScript?

• Function

• String

• Object

• Array

What is type coercion in JavaScript?

• Manually converting a value from one type to another

• Forcing a variable to change its type

• Automatically converting a value from one type to another

• Preventing a variable from changing its type

Which operator is used to concatenate strings in JavaScript?

• +

• -

• /

• *

What is the purpose of the Math object in JavaScript?

• To perform mathematical operations

• To handle date and time

• To perform string operations

• To manage arrays