A primary key field is used to ensure that each record is:
A) saved. B) unique. C) duplicated. D) valid.
B
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When an existing file is opened for Output
(A) new data are added at the end of the existing file. (B) the file is erased completely and new data is added at the beginning of the file. (C) Visual Basic generates an error message and stops program execution. (D) data may be read from it.
Answer the following questions true (T) or false (F)
1. Call-by-reference is restricted to void functions. 2. Names of parameters in functions, especially function prototypes, have no meaning, and may be selected quite arbitrarily.
The To box contains the ________ of the recipient
A) e-mail addresses B) street addresses C) phone numbers D) full names
Evolved High-Speed Packet Access (HSPA+) provided theoretical speeds up to __________, although most HSPA+ implementations rarely exceeded 10 Mbps.
A. 16 Mbps B. 128 Mbps C. 168 Mbps D. 256 Mbps