FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -A password for a computer system requires exactly 6 characters. Each character can be either one of the 26 letters from A to Z or one of the ten digits from 0 to 9.

Detailed explanation-2: -Answer: 6 characters is between 0 words and 2 words with spaces included in the character count. If spaces are not included in the character count, then 6 characters is between 1 words and 2 words.

Detailed explanation-3: -Answer and Explanation: This problem is a case of a permutation with repetition allowed. We are to arrange 26 lowercase letters of the English alphabet to form a 6-character password. There are 308, 915, 776 possible passwords.

Detailed explanation-4: -A six-bit character code is a character encoding designed for use on computers with word lengths a multiple of 6. Six bits can only encode 64 distinct characters, so these codes generally include only the upper-case letters, the numerals, some punctuation characters, and sometimes control characters.

Detailed explanation-5: -A seven-character complex password could be cracked in 31 seconds, while one with six or fewer characters could be cracked instantly. Shorter passwords with only one or two character types, such as only numbers or lowercase letters, or only numbers and letters, would take just minutes to crack.