After Matt, a user, enters his username and password at the login screen of a web enabled portal, the following appears on his screen: 'Please only use letters and numbers on these fields' Which of the following is this an example of?

A. Proper error handling
B. Proper input validation
C. Improper input validation
D. Improper error handling


Answer: B. Proper input validation

Computer Science & Information Technology

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If lower is the first subscript in a contiguous portion of an array, and upper is the last subscript, then the array item in the middle of that array portion is at subscript

A) (lower + upper)/2 B) (lower — upper)/2 C) lower + upper/2 D) (upper — lower)/2

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Microsoft PowerPoint is used to create ________

A) newsletters B) presentations C) documents D) databases

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A data table must be built from a(n) ________

Fill in the blank(s) with the appropriate word(s).

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Is it legal for a subclass of an abstract class not to implement all of the methods it inherits? Briefly explain.

What will be an ideal response?

Computer Science & Information Technology