Oracle OCP 19c 认证1Z0-083考试(第11题)

Posted 2021-07-09 itsaka

Which two are true about the character sets used in an Oracle database? (Choose two.)

• A. Single-byte character sets provide better performance than multibyte character sets.
• B. Unicode enables information from any language to be stored using a single character set.
• C. Unicode is the only supported character set for Oracle databases created using Database Configuration Assistant (DBCA).
• D. Single-byte character sets always use 7-bit encoding schemes.
• E. Multibyte character sets allow more efficient space utilization than single byte character sets.
• F. Single-byte character sets always use 8-bit encoding schemes.

 

A, B are correct

A > Single-byte character sets result in better performance than multibyte character sets, and they also are the most efficient in terms of space requirements.
Ref: https://docs.oracle.com/en/database/oracle/oracle-database/19/nlspg/choosing-character-set.html#GUID-BF26E01D-AB92-48FC-855A-69A5B3AF9A92

B> Unicode is a universal encoded character set that enables information from any language to be stored using a single character set.

Ref:https://docs.oracle.com/cd/B19306_01/server.102/b14225/ch6unicode.htm#:~:text=Unicode%20is%20a%20universal%20encoded%20character%20set%20that,been%20adopted%20by%20many%20software%20and%20hardware%20vendors.