CMS专题
多选题Which two statements are true regarding transactions in an Oracle database（）AMultiple transactions can use the same undo segment.BA transaction is assigned an undo segment when it is started.CMore than one transaction cannot share the same extent in th
题目
Multiple transactions can use the same undo segment.
A transaction is assigned an undo segment when it is started.
More than one transaction cannot share the same extent in the undo tablespace.
The transactions use system undo segment to store undo data if all the segments in the undo tablespaceare used.
相似问题和答案
第1题：
Which two statements regarding firewall user authentication client groups are true?（） (Choose two.)
- A、A client group is a list of clients associated with a group.
- B、A client group is a list of groups associated with a client.
- C、Client groups are referenced in security policy in the same manner in which individual clients are referenced.
- D、Client groups are used to simplify configuration by enabling firewall user authentication without security policy.
正确答案:B,C
第2题：
Which two statements are true regarding high-availability chassis clustering？（）
- A、A chassis cluster consists of two devices.
- B、A chassis cluster consists of two or more devices.
- C、Devices participating in a chassis cluster can be different models.
- D、Devices participating in a chassis cluster must be the same models
正确答案:A,D
第3题：
A. The same key is used for encryption and decryption.
B. It is commonly used to create digital certificate signatures.
C. It uses two keys: one for encryption and a different key for decryption.
D. An attacker can decrypt data if the attacker captures the key used for encryption.
第4题：
Which two statements are TRUE regarding Coherence Indexes ？ （）
- A、 indexes are maintained by cache entry ownes
- B、 an application should not suggest an index that another aplication had suggested
- C、 indexes cannot be sorted
- D、 each application using Coherence may suggest the same set of indexes when it starts
正确答案:A,D
第5题：
Which two statements regarding asymmetric key encryption are true？（）
- A、The same key is used for encryption and decryption.
- B、It is commonly used to create digital certificate signatures.
- C、It uses two keys： one for encryption and a different key for decryption.
- D、An attacker can decrypt data if the attacker captures the key used for encryption
正确答案:A,B
第6题：
Which two statements are true regarding the role of the Routing Engine (RE)?（）
- A、The RE controls and monitors the chassis.
- B、The RE manages the Packet Forwarding Engine (PFE).
- C、The RE receives a copy of the forwarding table from the forwarding plane.
- D、The RE implements class of service (COS).
正确答案:A,B
第7题：
Which two statements are true regarding L2TP? （）(Choose two.)
- A、Tunnels are initiated by the LAC
- B、Tunnels are initiated by the LNS
- C、By default, subscriber authentication occurs on the LNS
- D、By default, subscriber authentication occurs on the LAC
正确答案:A,C
第8题：
A. Tunnels are initiated by the LAC
B. Tunnels are initiated by the LNS
C. By default, subscriber authentication occurs on the LNS
D. By default, subscriber authentication occurs on the LAC
第9题：
Which two statements are true regarding undo tablespaces（）
- A、The database can have more than one undo tablespace.
- B、The UNDO_TABLESPACE parameter is valid in both automatic andmanualundo management.
- C、Undo segments automatically grow and shrink as needed， acting as circular storage buffer for their assigned transactions.
- D、An undotablespaceis automatically created if the UNDO_TABLESPACEparameter is not set and the UNDO_MANAGEMENT parameter is set to AUTO during the database instance start up.
正确答案:A,C
第10题：
Which two statements are true regarding subqueries? （）
- A、A subquery can retrieve zero or more rows
- B、Only two subqueries can be placed atone level
- C、A subquery can be used only in SQL query statements
- D、A subquery can appear on either side of a comparison operator
- E、There is no limit on the number of subquery levels in the WHERE clause of a SELECT statement
正确答案:A,D