单项选择题

Which of the following would be affected by setting NLS_LENGTH_SEMANTICS=CHAR？（）

A. All objects in the database
B. Tables owned by SYS and SYSTEM
C. Data dictionary tables
D. NCHAR columns
E. CHAR columns

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单项选择题

Which NLS parameter can be used to change the default Oracle sort method from binary to linguistic for the SQL SELECT statement？（）

A. NLS_LANG
B. NLS_COMP
C. NLS_SORT
D. None of the above

单项选择题

Which of the following NLS_SORT parameter values would result in case-insensitive and accent-insensitive binary sorts？（）

A. NLS_SORT = BINARY
B. NLS_SORT = BINARY_AI
C. NLS_SORT = BINARY_CI
D. NLS_SORT = BINARY_AI_CI
E. Binary sorts are case insensitive and accent insensitive by default

单项选择题

Automatic data conversion will occur if which of the following happens？（）

A. The client and server have different NLS_LANGUAGE settings
B. The client and server character sets are not the same，and the database character set is not a strict superset of the client character set
C. The client and server are in different time zones
D. The client requests automatic data conversion
E. The AUTO_CONVERT initialization parameter is set to TRUE