phoenix questions

• Are hexadecimal numbers ever negative?
• Why does hashtable have constant access time in average?
• A good hash function to use in interviews for integer numbers, strings?
• How to find the closest element to a given key value in a binary search tree?
• Converting ArrayList of Characters to a String?
• HashSet look-up complexity?
• Java collections convert a string to a list of characters
• Can we write our own iterator in Java?

phoenix answers