As shown in the accompanying figure, a closed envelope icon appears for an unread message.
Answer the following statement true (T) or false (F)
True
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Match each aggregate function with the value it returns: I. Avg II. Count III. Maximum IV. Minimum V. Sum A. Returns the data item with the highest value B. Returns the data item with the lowest value C. Returns the mean value of a group of numbers D. Returns the total value of a column of numbers E. Returns the number of fields containing data
What will be an ideal response?
?_________ allows online users to exchange messages immediately, even while they are working in another program or application.
Fill in the blank(s) with the appropriate word(s).
Strings are considered ____________ because once you give a string a value; it cannot be modified. Methods that seem to be modifying a string are actually returning a new string containing the modification.
Fill in the blank(s) with the appropriate word(s).
Answer the following statements true (T) or false (F)
1. A logic bomb is the event or condition that determines when the payload is activated or delivered. 2. Many forms of infection can be blocked by denying normal users the right to modify programs on the system. 3. A macro virus infects executable portions of code. 4. E-mail is a common method for spreading macro viruses. 5. In addition to propagating, a worm usually carries some form of payload.