Is relational DBMS physical data model suitable for spatial data?如果不适合,有哪两类解决途径?

题目

Is relational DBMS physical data model suitable for spatial data?如果不适合,有哪两类解决途径?

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第1题:

The relational database model requires the data be(110)through programs that don't rely on the position of the data in the database. This is in direct(111)to the other database mode, where the program has to follow a series of pointers to the data it seeks. A program(112)a relational database simply asks for the data it seeks; the DBMS performs the necessary searches and(113)the information. The(114)on how the search is done are specific to the DBMS and vary from product to product.

A.accessed

B.moved

C.read

D.wrote


正确答案:A

第2题:

(73) is a query language for manipulating data in a relational database.A.Assemble SX

(73) is a query language for manipulating data in a relational database.

A.Assemble

B.SQL

C.C++

D.Fortran


正确答案:B
SQL是一个操作关系数据库中数据的查询语言。

第3题:

The X.25 standard specifies three layers of functionality.Which layers of the OSI model correspond to the X.25 layers?

A.the Physical, Network, and Session Layers

B.the Physical, Data Link, and Network Layers

C.the Physical, Data Link, and Transport Layers

D.the Physical, Session, and Presentation layers


正确答案:B

第4题:

Which layer of the OSI reference model uses flow control, sequencing, and acknowledgements to ensure that reliable networking occurs?()

A. data link

B. network

C. transport

D. presentation

E. physical


参考答案:C

第5题:

Which three of the following OSI model layers also belong to the TCP/IP model?()

A. The application layer

B. The session layer

C. The data link layer

D. The transport layer

E. The network interface layer

F. The physical layer


参考答案:A, D, E

第6题:

Which layer in the OSI model is responsible for translating frames into bits?()

A. Application Layer

B. Presentation Layer

C. Data Link Layer

D. Physical Layer


参考答案:C

第7题:

The TCP/IP stack is a complete set of networking protocols. The OSI Model was meant

to be a standardized way of connecting devices together. and most protocols have some direct

correlation to the OSI Model. The OSI Model has 7 layers. the foruth layer is called(75)

A. physical layer

B. data link Iayer

C.application layer

D.transport layer


正确答案:D
TCP/IP协议栈是一种网络协议实现。OSI模型是用来进行设备间连接标准化的一种模型。OSI模型包含7层,第四层是传输层。

第8题:

(73)is a query language for manipulating data in a relational database.

A.Assemble

B.SQL

C.C++

D.Fortran


正确答案:B
SQL是一个操作关系数据库中数据的查询语言。

第9题:

The TCP/IP network model differs from the more popular OSI model. Which of the layers below belong to the TCP/IP model?()

A. application layer

B. session layer

C. transport layer

D. internet layer

E. network layer

F. data link layer

G. physical layer


参考答案:A, C, D

第10题:

cloud storage is a model of computer of computer data storage in which the digital data is stored in logical pools.The physical storage spans multiple servers(somentimes in multiple locations),and the physical environment is typically owned and managed by a hosting company.As for the cloud concepet,the cloud storage service is one kind of( ).

A.、laaS
B.PaaS
C.SaaS
D.DaaS

答案:A
解析:

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