CMS专题
多选题Which two statements are true regarding B-tree indexs（）AThe leaf blocks in the index are doubly linked.BThe leaf node stores a bitmap for each key value.CThe rows with NULL value in key columns also have entries in the index.DThe deletion of a row from
题目
The leaf blocks in the index are doubly linked.
The leaf node stores a bitmap for each key value.
The rows with NULL value in key columns also have entries in the index.
The deletion of a row from the table causes a logical deletion in index leaf block and the space becomesavailable for the new leaf entry
参考答案和解析
相似问题和答案
第1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2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3题：
A. It cannot generate recommendations that support multiple workload queries.
B. It can recommend partitioning on tables provided that the workloads have some predicates and joins on the columns of the NUMBER or DATE type.
C. It can recommend partitioning only on tables that have at least 10,000 rows.
D. It can recommend only B-tree indexes and not bitmap or function-based indexes
第4题：
Which two statements are true regarding B-tree indexs（）
- A、The leaf blocks in the index are doubly linked.
- B、The leaf node stores a bitmap for each key value.
- C、The rows with NULL value in key columns also have entries in the index.
- D、The deletion of a row from the table causes a logical deletion in index leaf block and the space becomesavailable for the new leaf entry
正确答案:A,D
第5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6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7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8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9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10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