Java Developer

1) We initialize a hash map ‘freqOfElements’ to store the frequency of each element and vector ‘ans’ to store the final non-duplicate elements.

2) We will iterate over all the elements of the array, i.e., i = 0 to i = N - 1:

• We will store the frequency of an element arr[i] in ‘freqOfElements’.
• If the element already exists in ‘m’ then increment freqOfElements[arr[I]].

3) We will iterate over all the elements of the array, i.e., i = 0 to i = N - 1:

• If freqOfElements[arr[i]] is not -1 then we store the value of arr[i] in ‘ans’.
• We change the value of freqOfElements[arr[i]] to -1.

4) We will return ‘ans’ as the final answer.

That's it done!

Normally use while loop and reverse a number

Print spaces and then normally print a triangle

Tip 1 : The cross questioning can go intense some time, think before you speak.

Tip 2 : Be open minded and answer whatever you are thinking, in these rounds I feel it is important to have opinion.

Tip 3 : Context of questions can be switched, pay attention to the details. It is okay to ask questions in these round, like what are the projects currently the company is investing, which team you are mentoring. How all is the work environment etc.