Adobe Research Intern interview questions

1. Expected number of throws to get 5 on a dice. 2. Expected number of loops in a bowl of N spaghetti, where two ends are randomly selected and joined. 3. If one of the eigenvalues of a 3x3 matrix is 0, can we determine an unknown entry in the matrix? 4. https://www.geeksforgeeks.org/rearrange-characters-string-no-two-adjacent/