You are creating a database for a student directory.
The Students table contains the following fields:

Which statement will retrieve only the first name, last name, and telephone number for every student listed in the directory?

• A.Option A
• B.Option B
• C.Option C
• D.Option D

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You have a class named Truck that inherits from a base class named Vehicle. The Vehicle class includes a protected method named brake ().
How should you call the Truck class implementation of the brake () method?

• A.Vehicle. brake ();
• B.This. brake ();
• C.MyBase. brake();
• D.Truck. brake ();

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Simulating the final design of an application in order to ensure that the development is progressing as expected is referred to as:

• A.Software testing
• B.Analyzing requirements
• C.Flowcharting
• D.Prototyping

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You need to develop a C# program that exports the contents of the Customers table to an XML file.
The exported data must be in the following format:
- <Customer CustomerID="ALFKI" ContactName="Maria Anders" Phone="030-007-
4321" />
- <Customer CustomerID="ANATR" ContactName="Ana Trujillo" Phone="(5) 555-
4729" />
Which of the following code segments should you use to export the Customers table to the specified XML format?

• A.foreach(DataColumn c in dataset1.tables["Customers"].Columns) {
• B.ColumnMapping = MappingType.Attribute;
  }
  dataSet1.WriteXml("Customers.xml");
• C.foreach(DataColumn c in dataset1.tables["Customers"].Columns) {
• D.foreach(DataColumn c in dataset1.tables["Customers"].Columns) {
• E.ColumnMapping = MappingType.Element;
  }
  dataSet1.WriteXml("Customers.xml", XmlWriteMode.WriteSchema);
• F.foreach(DataColumn c in dataset1.tables["Customers"].Columns) {
• G.ColumnMapping = MappingType.Attribute;
  }
  dataSet1.WriteXml("Customers.xml", XmlWriteMode.WriteSchema);
• H.ColumnMapping = MappingType.Element;
  }
  dataSet1.WriteXml("Customers.xml");

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You create an object of type ANumber.
The class is defined as follows.

What is the value of _number after the code is executed?

• A.7
• B.3
• C.0
• D.Null

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