Computer Basic Information
What is the name of the earliest calculating machine which was based on concepts found in modern computers but was unfortunately never built?

Babbage's Difference Engine
Pascal's Adder
Leibnitz's Multiplier
None of these
Differential Analyser

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Computer Basic Information
Which one of the following would be considered as a way that a computer virus can enter a computer system?

Opening an application previously installed on the computer
None of these
Borrowed an illegal copy of software
Running antivirus programs
Viewing a website without causing any additional transactions

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