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Questions and Answers
What happens if you assign a value to a variable that has not been declared in JavaScript?
What happens if you assign a value to a variable that has not been declared in JavaScript?
- It becomes a global variable (correct)
- It becomes a function argument
- It becomes a local variable
- It will throw an error
Which keyword in JavaScript does create a property on the global window object?
Which keyword in JavaScript does create a property on the global window object?
- var (correct)
- const
- let
- function
In which mode does all modern browsers support running JavaScript?
In which mode does all modern browsers support running JavaScript?
- Strict mode (correct)
- Global mode
- Local mode
- Window mode
When does the lifetime of a JavaScript variable start?
When does the lifetime of a JavaScript variable start?
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What happens to global variables in a web browser when you close the browser window?
What happens to global variables in a web browser when you close the browser window?
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