CMS专题

单选题Which of the following constraint types can be used to ensure the value of an INTEGER column references only positive values?（）A UniqueB CheckC ReferentialD Informational

题目
单选题
Which of the following constraint types can be used to ensure the value of an INTEGER column references only positive values?（）
A

Unique

B

Check

C

Referential

D

Informational

参考答案和解析
正确答案： C
解析： 暂无解析
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相似问题和答案

第1题：

Which of the following constraint types can be used to ensure the value of an INTEGER column references only positive values?()

A.Unique

B.Check

C.Referential

D.Informational


参考答案：B

第2题：

Which of the following correctly describe characteristics of PPP?()

A. Encapsulates several different types of routing protocols.

B. Supports only IP.

C. Can be used over analog circuits.

D. Is proprietary to Cisco

E. Supports error correction.


参考答案：A, C, E

第3题：

You need to describe the various types of flow control to your co-workers. Which of the following are types of flow control that can be used in a network? (Choose three)

A. Congestion avoidance

B. Windowing

C. Cut-through

D. Buffering

E. Load Balacing

F. Fast Forward


正确答案：ABD
A,B,D

第4题：

Which of the following correctly describe characteristics of PPP?（）

  • A、Encapsulates several different types of routing protocols.
  • B、Supports only IP.
  • C、Can be used over analog circuits.
  • D、Is proprietary to Cisco
  • E、Supports error correction.

正确答案:A,C,E

第5题：

Which of the following management types can be used to deploy appropriate quality-of-servicesolutions to make the most efficient use of bandwidth？（）

  • A、Fault management
  • B、Accounting management
  • C、Operations management
  • D、Performance management
  • E、Security management
  • F、Configuration management

正确答案:D

第6题：

Which of the following database objects can be used to raise an error if a table is updated?()

A.Package

B.Trigger

C.Stored Procedure

D.Informational Constraint


参考答案：B

第7题：

Which two statements are true regarding the USING clause in table joins?（）

  • A、It can be used to join a maximum of three tables 
  • B、It can be used to restrict the number of columns used in a NATURAL join 
  • C、It can be used to access data from tables through equijoins as well as nonequijoins 
  • D、It can be used to join tables that have columns with the same name and compatible data types

正确答案:B,D

第8题：

Which of the following connector types is used for coax cable?()

A.BNC

B.ST

C.LC

D.SC


参考答案：A

第9题：

In a RSTP implementation, which of the following two link types are used? （）(Choose two.)

  • A、Shared
  • B、Point-to-Point
  • C、Designated
  • D、Multiaccess non-broadcast

正确答案:A,B

第10题：

When configured. MPLS can increase routing redundancy by providing which of the following network topology types?（）

  • A、Bus
  • B、Mesh
  • C、Multipath
  • D、Ring

正确答案:B

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