Full Stack Web Development MASTERY Course - Novice to Expert - Error Handling in JavaScript

The video tutorial covers error handling in JavaScript, focusing on try, catch, throw, and finally statements. It explains various error types like syntax, runtime, type, reference, eval, and range errors. The tutorial demonstrates how to use try-catch to manage errors without stopping code execution and introduces throw and finally keywords for custom error handling and ensuring code execution.

What is the primary purpose of using try-catch statements in JavaScript?

• To stop code execution immediately when an error occurs

• To log errors to the console

• To prevent any errors from occurring

• To handle errors and allow the code to continue executing

Which type of error occurs when there is a mistake in the syntax of the code?

• Runtime Error

• Type Error

• Syntax Error

• Reference Error

What kind of error is thrown when a variable is used without being declared?

• Type Error

• Syntax Error

• Reference Error

• Eval Error

Which error type occurs when a variable or parameter is not of a valid type?

• Reference Error

• Type Error

• Range Error

• Syntax Error

What is the role of the catch block in a try-catch statement?

• To execute code regardless of errors

• To define a custom error

• To stop the execution of the program

• To catch and handle errors that occur in the try block

What does the throw statement allow a programmer to do?

• Log errors to the console

• Catch errors

• Ignore errors

• Define custom errors

What happens if a function is called but not defined in the code?

• Syntax Error

• Reference Error

• Type Error

• Range Error

What is the purpose of the error parameter in the catch block?

• To provide information about the error that occurred

• To log the error to the console

• To stop the code execution

• To define a new error

In a try-catch-finally block, when is the finally block executed?

• Only if an error occurs

• Only if no error occurs

• Regardless of whether an error occurs or not

• Only if the catch block is executed

Which statement is used to ensure that a block of code runs regardless of whether an error occurred?

• catch

• try

• finally

• throw