多选题You want to make use of the object features available in the database for the form module you are developing. Which three statements about object types are true? （）AAn object type is a user-defined composite data type.BThe attributes of an object type

题目

多选题

You want to make use of the object features available in the database for the form module you are developing. Which three statements about object types are true? （）

An object type is a user-defined composite data type.

The attributes of an object type can be those of other object types.

A PL/SQL table of records is an example of a nested object type.

An object type must be declared as a type before the actual object itself can be declared.

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相似问题和答案

第1题：

You need to serialize an object of type List<int> in a binary format.The object is named data.Which code segment should you use?()

参考答案：A

第2题：

A management domain typically contains a large amount of management information. Each individual item of（71） information is an instance of a managed object type. The definition of a related set of managed （72）types is contained in a Management Information Base (MIB)module. Many such MIB modules are defined. For each managed object type it describes, a MIB （） defines not only the semantics and syntax of that managed object type, but also the method of identifying an individual instance so that multiple （74） of the same managed object type can be distinguished. Typically, there are many instances of each managed object （75） within a management domain

A.connection
B.window
C.module
D.destination

答案：C

解析：

第3题：

●Which of the following statements about object oriented database is not correct? (72) ．

(72) A．Each object has a unique object identify in the system

B．Encapsulation and inheritance are two important features of object oriented database

C．A subclass can inherit the attributes and methods of all its superclasses

D．A supereloss includes the attributes and methods at all subclasses

正确答案：B
【解析】译文：下列关于面向对象数据库的描述中，哪一个是错误的？
B.封装和继承是面向对象数据库的两个重要特征。

第4题：

The accounting manager wants you to create a form that when queried will display a calculated total of year-to-date actual expenditures for the found code entered. The values needed to generate this summary data are stored in multiple tables. Which data source type can you assign to the data block for this form without having the DBA create a database object?（）

A、database table
B、transactional trigger
C、stored procedure
D、FROM clause query
E、client-side procedure

正确答案:D

第5题：

You work as an application developer at Certkiller .com. You are developing an application that makes use of a Queue class object named MyQueue. This Queue class object will be used to store messages sent by the user during application run time. The application that you are developing provides an interface for administrators and an interface for users to create message reports.You want to ensure that all user messages stored in the MyQueue object are removed when an administrator selects the reset option.What should you do？（）

A、 Use the Enqueue method of the MyQueue object.
B、 Use the Clear method of the MyQueue object.
C、 Use the Dequeue method of the MyQueue object.
D、 Use the TrimToSize method of the MyQueue object.

正确答案:B

第6题：

A management domain typically contains a large amount of management information. Each individual item of（71） information is an instance of a managed object type. The definition of a related set of managed （）types is contained in a Management Information Base (MIB)module. Many such MIB modules are defined. For each managed object type it describes, a MIB （73） defines not only the semantics and syntax of that managed object type, but also the method of identifying an individual instance so that multiple （74） of the same managed object type can be distinguished. Typically, there are many instances of each managed object （75） within a management domain

A.path
B.object
C.route
D.packet

答案：B

解析：

第7题：

You are using Recovery wizard for performing incomplete recovery. Which of the following object types is NOT available in the Perform Recovery ：Type screen？（）

A、 Whole database
B、 Tablespaces
C、 Datafiles
D、 Archive logs
E、 Redo logs

正确答案:E

第8题：

Which of the following statements about object oriented databse is not correct?

A． Each object has a unique object identity in the system.

B．Encapsulation and inheritance are two important features of object oriented databasE.

C．A subclass can inherit the attributes and methods of all its superclasses.

D．A subclass includes the attributes and methods of all its subclasses.

正确答案：D

第9题：

Which three statements concerning the use of the java.io.Serializable interface are true？（）

A、Objects from classes that use aggregation cannot be serialized
B、An object serialized on one JVM can be successfully deserialized on a different JVM
C、The values in fields with the volatile modifier will NOT survive serialization and deserialization
D、The values in fields with the transient modifier will NOT survive serialization and deserialization
E、It is legal to serialize an object of a type that has a supertype that does NOT implement java.io.Serializable

正确答案:B,D,E

第10题：

An administrator wants to delete an account object using the Database Cleanup utility. Which of the following is the correct syntax to perform this task？（）

A、dbclean -object account -type obsolete -db dbname -days daysold
B、dbclean -table account -type obsolete -db dbname -days daysold
C、dbclean -object organization -type account -db dbname -days daysold
D、dbclean -object user -type account -db dbname -days daysold

正确答案:A

多选题You want to make use of the object features available in the database for the form module you are developing. Which three statements about object types are true? （）AAn object type is a user-defined composite data type.BThe attributes of an object type

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