Answer the following statements true (T) or false (F)
1. The data flow diagram graphically characterizes data processes and flows in a business system.
2. The biggest advantage of the data flow approach lies in the conceptual freedom found in the use of the four symbols.
3. The data flow diagram may be used to analyze the proposed system.
4. An arrow is used to depict an external entity that can give and receive data from the system.
1. TRUE
2. TRUE
3. TRUE
4. FALSE
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Answer the following statements true (T) or false (F)
1. Once a field has been specified as a primary key, Visual Basic will not allow that field to contain an empty entry for any record. 2. LINQ can be used in Visual Basic to sort records. 3. A LINQ clause beginning with Join and ending with a phrase of the form On foreign key of tblA Equals primary key of tblB causes two tables to be joined. 4. The Move next button of a navigator toolbar is never disabled. 5. When a navigation toolbar is used with a table from a database, the value of BindingSource1.Position is the index of the current record.
Each time you apply a change to an image, the new ____ of that image is added to the bottom of the History panel.
a. aspect ratio b. dimension c. format d. state
You and a friend decide to watch a movie on your computer. The movie is saved on a second hard drive on your system. When you are ready to watch the movie, you can’t find it on your computer. You try to locate the second hard drive, and it is no longer listed in Windows. What might be the problem with the movie and the hard drive?
A. Video player application has crashed. B. Hard drive has crashed. C. Movie has been deleted. D. Video card has crashed.
Encryption can be applied on a file, a folder, or an entire hard disk.
a. true b. false