A Computer System Requires Users to Have an Access Code

question 25

Multiple Choice

A computer system requires users to have an access code that consists of a three-digit number that is not allowed to start with zero and cannot repeat digits. How many such codes are possible?

• A) 990
• B) 648
• C) 729
• D) 720

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Definitions:

Fear of Elevators

An anxiety disorder where individuals experience fear or panic when thinking about or riding in elevators, also known as lift phobia.

Systematic Desensitization

A behavioral therapy technique used to reduce phobic responses and anxiety through gradual exposure to the feared object or situation combined with relaxation exercises.

Three Step Process

A general sequence of three stages or actions undertaken to achieve a particular outcome or solve a problem.

Psychotherapy

A therapeutic treatment method involving psychological techniques to help people overcome mental health issues, behavioral problems, or emotional difficulties.