题目内容

A supermarket website uses Google maps to display the location of their stores to customers. This is an example of a/an:

A. Crowdsourcing.
B. Social commerce.
C. Mashup.
D. Folksonomy

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The primary purpose of the systems _________ stage of the SDLC is to gather information about the existing system to determine the requirements for an enhanced system or a new system.

A. analysis
B. design
C. investigation
D. operation
E. testing

In a relational database, the primary key of one table is donated to another table as:

A. The title key
B. The entity key
C. The column key
D. The relational key
E. The foreign key

【单选题】 ______操作符在两个操作数中有一个（不是全部）为 True 时返回 True

PHP不允许的注释符号是（）

A. //
B.
C.
D. /*...*/