Neco 2022 Data Processing Question 26

Practice objective / multiple choice question 26 from the 2022 Neco Data Processing examination.

Neco 2022 Data Processing Objective / Multiple Choice Hard Difficulty

Question 26 NECO • 2022 • DATA_PROCESSING • objective

An organisation requires passwords to be exactly 12 characters long. Each character can be an uppercase letter (26), a lowercase letter (26), a digit (10) or one of 8 special symbols, giving 70 possible symbols. The policy further mandates that a valid password must contain at least one uppercase letter, at least one digit and at least one special symbol. (a) Using the inclusion‑exclusion principle, determine the total number of distinct passwords that satisfy the policy. (b) If an attacker can test \(10^{9}\) passwords per second, estimate how many years, to two significant figures, it would take to exhaust half of the valid password space.

A. ≈ 2.0×10^4 years

B. ≈ 1.5×10^5 years

Correct Answer C. ≈ 2.0×10^5 years

D. ≈ 3.0×10^5 years

Correct Answer

Correct Option:

≈ 2.0×10^5 years

This is Neco 2022 Data Processing Question 26. It is one of the objective questions from the 2022 Neco Data Processing examination.

Difficulty level: Hard .

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