COGNITIVE ASSESSMENT
Which of the following is NOT true about caring for computers and mobile devices?
A. Defragment your computer's hard drive if you notice a decline in performance.
B. Use a special screen cleaner; water is not sufficient.
C. If the air vent is dirty, contact a trained professional to have it cleaned.
D. Use compressed air to free the keyboard from dust and debris.
Answer: B
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Which of the following statements best describes a Trojan?
A. Malicious software that hides into the lower levels of the operating system and opens a backdoor B. Malicious software that records every key stroke and mouse movement C. Malicious software that disguises itself as a legitimate program D. Malicious software that takes the computer data hostage to extort money
What type of value is returned by the overloaded equality and relational operators for strings?
a. int b. bool c. double d. null