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Error Handling and Debugging
Question 1
What is the purpose of the try...catch block in JavaScript?
- A
To handle asynchronous code
- B
To handle errors during code execution
- C
To stop the execution of a program
- D
To skip specific lines of code
Question 2
Which statement is used to manually throw an error in JavaScript?
- A
throw
- B
raise
- C
error
- D
reject
Question 3
What is the Error object used for?
- A
To create custom error messages
- B
To debug code by printing logs
- C
To represent runtime errors in JavaScript
- D
To pause code execution
Question 4
What is the output of the following code?
try {
console.log(a);
} catch (e) {
console.log(e.message);
}
- A
a is not defined
- B
ReferenceError: a is not defined
- C
Undefined
- D
Throws no error
Question 5
Which console method is used to display a table of data?
- A
console.log()
- B
console.error()
- C
console.data()
- D
console.table()
Question 6
What happens if there is no catch block for a thrown error?
- A
The program continues execution
- B
The error is ignored
- C
The program crashes or stops execution
- D
A warning is displayed in the console
Question 7
Which of the following methods halts the browser's execution to inspect the code?
- A
debugger
- B
console.stop()
- C
break()
- D
console.inspect()
Question 8
What is the purpose of the finally block in error handling?
- A
Executes only if an error occurs
- B
Executes only if no error occurs
- C
Executes after the try and catch blocks, regardless of errors
- D
Stops the error from propagating further
Question 9
Which of the following is NOT a console method?
- A
console.time()
- B
console.warn()
- C
console.info()
- D
console.alert()
Question 10
What is the primary advantage of using a linter like ESLint in debugging?
- A
Automatically fixes all errors in code
- B
Highlights potential errors and enforces coding standards
- C
Pauses execution of the code
- D
Provides runtime debugging tools
There are 10 questions to complete.
