The JavaScript function for receiving input is ____.
A. Declare
B. prompt()
C. var
D. document.write()
Answer: B
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A(n) ____ key is a field or collection of fields that could function as the primary key, but was not chosen to do so.
A. candidate B. artificial C. surrogate D. foreign
Which of the following are the classes in JavaFX for representing an event?
a. ActionEvent b. MouseEvent c. KeyEvent d. WindowEvent
Suppose that only 80% of the STUDENT records from Exercise 17.28 have a value for PHONE, 85% for MAJORDEPTCODE, 15% for MINORDEPTCODE, and 90% for DEGREEPROGRAM, and we use a variable-length record file. Each record has a 1-byte field type for each field occurring in the record, plus the 1-byte deletion marker and a 1-byte end-of-record marker. Suppose we use a spanned record organization, where each block has a 5-byte pointer to the next block (this space is not used for record storage).
(a) Calculate the average record length R in bytes. (b) Calculate the number of blocks needed for the file.
There are two major types of wireless networks that are popular today among users. One of these networks is Wi-Fi; what is the other?
A. 4G LTE B. Bluetooth C. 3G D. GSM