Event Management React Router

1. Write the correct answer from the following options and give an explanation (2-5 lines). answer:B: ReferenceError: greetign is not defined Explanation: The code contains a typo in the variable name. It should be greeting, but it is written as greetign. Therefore, a ReferenceError will be thrown because greetign is not defined.

2. Write the correct answer from the following options and give an explanation (2-5 lines).

Answer: C

Explanation: The + operator in JavaScript can be used for both addition and string concatenation. In this case, 1 is a number, and "2" is a string. When you use + with a string and a number, JavaScript converts the number to a string and performs string concatenation. So, the result is "12" as a string.

3. Write the correct answer from the following options and give an explanation (2-5 lines). Answer: A

Explanation: The info.favoriteFood property is initially set to the first element of the food array, which is "🍕". Later, it is reassigned to "🍝". However, this reassignment does not affect the food array. Therefore, when you log food, it remains ['🍕', '🍫', '🥑', '🍔'].

4. Write the correct answer from the following options and give an explanation (2-5 lines). Answer: B

Explanation: The sayHi function expects an argument name. When you call sayHi() without passing an argument, it will still execute, but name inside the function will be undefined. Therefore, the returned string will be "Hi there, undefined".

5. Write the correct answer from the following options and give an explanation (2-5 lines). Answer: A

Explanation: The forEach loop iterates over the nums array and increments the count variable whenever a truthy value (non-zero) is encountered. In this case, only the number 1 is truthy in the array, so it increments count once. Therefore, count is equal to 1 after the loop, and the console.log(count) statement will output 1.