Answer 1

Exact question asked here ,I highly advise you to use Google first
https://www.google.com/url?sa=t&source=web&rct=j&url=https://stackoverflow.com/questions/39909411/what-is-the-default-value-of-an-array-in-c%23:~:text%3DThere%2520is%2520no%2520default%2520value%2520so%2520it%27s%2520garbage.%26text%3DYou%2520can%27t%2520do%2520what,is%2520cause%2520for%2520undefined%2520behavior.&ved=2ahUKEwihoqyjounsAhWGzTgGHR2eC68QFjABegQIBBAE&usg=AOvVaw1GegxcsHyNhy5xvxrVxfcL