City Guilds Model Questions Vol1 2020 Information Technology Question 11
Practice objective / multiple choice question 11 from the 2020 City Guilds Model Questions Vol1 Information Technology examination.
A secure system requires passwords that are exactly 8 characters long. Each character can be an uppercase letter (26 choices), a lowercase letter (26 choices), a digit (10 choices) or a symbol (12 choices). The policy mandates that a valid password must contain at least one uppercase letter, one lowercase letter, one digit and one symbol.\n\n(a) How many different passwords satisfy the policy? Express your answer in scientific notation to two decimal places.\n(b) What is the entropy of the password space in bits, rounded to the nearest whole number?\n(c) If an attacker can test \(10^{9}\) passwords per second, approximately how many days would it take to try half of the possible passwords?
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This is City Guilds Model Questions Vol1 2020 Information Technology Question 11. It is one of the objective questions from the 2020 City Guilds Model Questions Vol1 Information Technology examination.
Difficulty level: Hard .
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