Neco 2017 Computer Studies Question 50

Practice objective / multiple choice question 50 from the 2017 Neco Computer Studies examination.

Neco 2017 Computer Studies Objective / Multiple Choice Medium Difficulty
Question 50 NECO • 2017 • COMPUTER_STUDIES • objective

A system requires passwords of exactly 8 characters, using uppercase letters (26), lowercase letters (26), and digits (10). No other symbols are allowed. (a) How many possible passwords are there? (b) If an attacker can test \(10^{9}\) passwords per second, what is the minimum time in seconds to guarantee trying all possibilities? Express your answers in scientific notation rounded to two significant figures.

Answer Options

A. 1.8×10^14 passwords, 1.8×10^5 seconds
B. 2.2×10^13 passwords, 2.2×10^4 seconds
Correct Answer C. 2.2×10^14 passwords, 2.2×10^5 seconds
D. 3.0×10^14 passwords, 3.0×10^5 seconds
Correct Answer
C
Correct Option:
2.2×10^14 passwords, 2.2×10^5 seconds

About This Question

This is Neco 2017 Computer Studies Question 50. It is one of the objective questions from the 2017 Neco Computer Studies examination.

Difficulty level: Medium .

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