Advanced associate SDE

You are given a positive integer 'N'. Your task is to return all the prime numbers less than or equal to the 'N'.

Note:

1) A prime number is a number that has only two factors: 1 and the number itself.

2) 1 is not a prime number.

You have been given an array/list 'ARR' of integers. Your task is to find the second largest element present in the 'ARR'.

Note:

a) Duplicate elements may be present.

b) If no such element is present return -1.

Example:

Input: Given a sequence of five numbers 2, 4, 5, 6, 8.

Output:  6

Explanation:
In the given sequence of numbers, number 8 is the largest element, followed by number 6 which is the second-largest element. Hence we return number 6 which is the second-largest element in the sequence.

Give a short introduction.

What is your favourite subject in college?

Tell me something about your project (as I mentioned about the project in the introduction).

What are some kinds of challenges, problems faced during your project and how did you deal with them?

Do you want to continue this project or do you want to leave it here?

Do you have any questions for me?