Explain how a basic computer virus operates and how it uses other host programs.
What will be an ideal response?
A virus is a program that attaches itself to a file or another program. A virus doesn't stand on its own, so it can't replicate itself or operate without the presence of a host. A virus attaches itself to a host file or program just as the flu attaches itself to a host organism, and then performs whatever the creator designed it to do.
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Answer the following statements true (T) or false (F)
1. To create a Check Changed event handle for a Radio Button or a Check Box, double-click the control in the Designer. 2. A switch statement’s test expression can be any data type. 3. Once you create a List Box control, you add items to its Collection property. 4. When displaying an item from a List Box, you have to call the Selected Item property’s To String method to retrieve the value as a string.
What must you do before you can create a crosstab query that references more than one table?
A) Make sure the relationships have been properly created in the Relationships window. B) Run an append query to combine the records from the various tables. C) Run a make table query and use that as the source for the crosstab query. D) Create a select query which includes the fields from the various tables you want included in the crosstab query.
NAT is defined in RFC ____, which describes methods for connecting private (internal) IP addresses to the Internet.
A. 1022 B. 1133 C. 2145 D. 3022
Case Based Critical ThinkingCase 1Bartolo is the official photographer for a new Italian zombie film, and he has been given the task of snapping some stills for the promotional website. He took all of the pictures he needed, but due to time constraints, the lighting wasn't exactly what he had wanted. When he opened the photos on his desktop, the colors all seemed washed out or too bright. Because it takes the actors several hours to apply the zombie make-up, there is no chance that Bartolo can do another shoot and still stay under budget. He decides to adjust the images using Photoshop. Bartolo knows he can ____ by adding and subtracting tonal values from existing layers.
A. flux space B. profile histograms C. modify curves D. balance colors