Which of the following devices would allow a technician to utilize a single mouse, keyboard, and display to control numerous desktop PCs?（）
A、Port replicator
B、Docking station
C、USB hub
D、KVM switch
You are managing the Oracle database. Which of the following choices correctly identifies when Oracle reads the contents of the init.ora file?（）
A、When the instance is started
B、When the database is mounted
C、When the database is opened
D、When the database is closed
You are creating tablespaces in Oracle. Which of the following keywords or clauses permits the datafiles of a database to grow automatically in order to accommodate data growth?（）
A、DEFAULT STORAGE
B、EXTENT MANAGEMENT
C、AUTOEXTEND
D、DATAFILE
Which of the following datatypes are used in situations where you want an ordered set of data elements, where every element is the same datatype, and where you predefine the number of elements that appear in the set?（）
A、REF
B、TABLE
C、CLOB
D、VARRAY
软件商标权的保护对象是指（）。
A、商业软件
B、软件商标
C、软件注册商标
D、已使用的软件商标
Evaluate these two SQL statements: SELECT last_name, salary, hire_dateFROM EMPLOYEES ORDRE BY salary DESC; SELECT last_name, salary, hire_dateFROM EMPOLYEES ORDER BY 2 DESC; What is true about them? （）
A、The two statements produce identical results.
B、The second statement returns a syntax error.
C、There is no need to specify DESC because the results are sorted in descending order by default.
D、The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.
