Which two statements are true about setting the per-thread buffers higher than required?（） More memory per thread is beneficial in all scenarios。 It causes increased overhead due to initial memory allocation。 It can affect system stability during peak load times, due to swapping。 It requires increasing the thread_cache_size variable。
基站空调室外机一年要进行至少（）次的清洗工作。 1。 2。 3。 4。
Which of the following best describes why a customer would choose x86 server solutions over mid-range or mainframe solutions？（） x86 servers are more reliable than mid-range and Mainframe servers.。 x86 servers require less support personnel.。 Microsoft Operating Systems require less maintenance than mid-range and Mainframe Operating Systems.。 x86 solutions cost less.。
You execute this command to drop the ITEM table， which has the primary key referred in the ORDERtable： SQL> DROP TABLE scott.item CASCADE CONSTRAINTS PURGE； Which two statements are true about the effect of the command（） No flashback is possible to bring back the ITEM table.。 The ORDER table is dropped along with the ITEM table.。 The dependent referential integrity constraints in the ORDER table are disabled.。 The dependent referential integrity constraints in the ORDER table are removed.。 The table definition of the ITEM table and associated indexes are placed in the recycle bin.。
下列各项中，属于一个分项工程的是（）。 地基与基础工程。 主体结构。 钢筋安装工程。 屋面工程。
Evaluate the following command：
SQL> CREATE TABLE design_data （id NUMBER， doc CLOB）
LOB（doc） STORE AS SECUREFILE（DEDUPLICATE）；
Which statement is true regarding the above command？（）
