To calculate the expected value of an outcome:A divide the value of each outcome by its probability, then add the results.B divide the value of the desired outcome by the value all possible outcomesC multiply the value of each outcome by its probability,

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Which of the following is not true of Britain.s foreign trade?（）

AThe value of Britain.s exports of goods usually exceeds the value of its imports.

BThe value of Britain.s imports of goods usually exceeds the value of its exports.

CManufactured goods now account for about 85%of British imports and about 80%of its exports.

DMost of the United Kingdom.s trade is with other developed countries,especially other members of the European Union.

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1. public class SimpleCalc {  2. public int value；  3. public void calculate（） { value += 7； }  4. } And：  1. public class MultiCalc extends SimpleCalc {  2. public void calculate（） { value -= 3； }  3. public void calculate（int multiplier） {  4. calculate（）；  5. super.calculate（）；  6. value *=multiplier；  7. }  8. public static void main（String[] args） {  9. MultiCalc calculator = new MultiCalc（）；  10. calculator.calculate（2）；  11. System.out.println（”Value is： “+ calculator.value）；  12. }  13. }  What is the result？（） 

• A、 Value is： 8
• B、 Compilation fails.
• C、 Value is： 12
• D、 Value is： -12
• E、 The code runs with no output.
• F、 An exception is thrown at runtime.

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Given a method that must ensure that its parameter is not null： 11. public void someMethod（Object value） { 12. // check for null value ... 20. System.out.println（value.getClass（））； 21. } What inserted at line 12， is the appropriate way to handle a null value？（）

• A、assert value == null；
• B、assert value != null， "value is null"；
• C、if （value == null） { throw new AssertionException（"value is null"）； }
• D、if （value == null） { throw new IllegalArgumentException（"value is null"）； }

第8题：

You are responsible for managing the database schema for an order entry application in a SQL Server 2005 database. After a design review, a member of the development staff asks you to add a new column named CommissionRate to the Product table. Because the actual commission rates for all products are not known at this time, each product has a default commission rate of 12 percent. The rate can be modified as necessary. You add the new column. You need to configure the table to assign the default value as efficiently as possible. What should you do?（）

• A、 Create an INSERT trigger to assign the default value to each item in the table. 
• B、 Create a CHECK constraint to validate the data and to assign the default value to each item in the table. 
• C、 Create an UPDATE trigger to update the default value for each new item in the table. 
• D、 Create a DEFAULT constraint to assign the default value specifying the WITH VALUES argument.

第9题：

You are creating a Windows Communication Foundation （WCF） service that accepts messages from clients when they are started. The message is defined as follows. [MessageContract] public class Agent { public string CodeName { get； set； }public string SecretHandshake { get； set； } } You have the following requirements： "The CodeName property must be sent in clear text. The service must be able to verify that the property value was not changed after being sent by the client. "The SecretHandshake property must not be sent in clear text and must be readable by the service. What should you do？（） 

• A、 Add a MessageBodyMember attribute to the CodeName property and set the ProtectionLevel to Sign. Add a MessageBodyMember attribute to the SecretHandshake property and set the protectionLevel to EncryptAndSign.
• B、 Add a DataProtectionPermission attribute to the each property and set the ProtectData property to true.
• C、 Add an XmlText attribute to the CodeName property and set the DataType property to Signed. add a PasswordPropertyText attribute to the SecretHandshake property and set its value to true.
• D、 Add an ImmutableObject attribute to the CodeName property and set its value property to true. Add a Browsable attribute to the SecretHandshake property and set its value to false.

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If all OSPF routers in a single area are configured with the same priority value,what value dose a router use for the ODPF router ID in the absence of a loopback interface?（）

• A、the IP address of the first Fast Ethernet interface
• B、the IP address of the console management interface
• C、the highest IP address among its active interfaces
• D、the lowest IP address among its active interfaces
• E、the priority value until a loopback interface is configured

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When a job exceeds the date specified in its END_DATE attribute, which of the following will happen?（）

• A、The job will be dropped automatically if the value of the AUTO_DROP attribute is TRUE
• B、The job will only be disabled if the value of the AUTO_DROP attribute is FALSE
• C、The STATE attribute of the job will be set to COMPLETED if the value of the AUTO_DROP attribute is FALSE
• D、All objects referenced by the job will be dropped if the value of the AUTO_DROP attribute is TRUE and the value of the CASCADE attribute is TRUE
• E、The STATE column of the job table will be set to COMPLETED for the job

第19题：

Your database is started by using the server parameter file （SPFILE）. You issued this command to change the value of the LOG_BUFFER initialization parameter：  ALTER SYSTEM SET LOG_BUFFER=24M SCOPE=BOTH；  What would be the outcome of this command？ （）

• A、The command would return an error because LOG_BUFFER is a static parameter.
• B、The parameter value would be changed and it would come into effect immediately.
• C、You need to restart the database so that parameter changes can come into effect.
• D、The command would succeed only if initialization parameter LOG_ARCHIVE_MAX_PROCESS is set to value 2.

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Windows Communication Foundation （WCF） application uses a data contract that has several data members. You need the application to throw a Serialization Exception if any of the data members are not present when a serialized instance of the data contract is deserialized. What should you do？（）

• A、 Add the Known Type attribute to the data contract.Set a default value in each of the data member declarations.
• B、 Add the Known Type attribute to the data contract.Set the Order property of each data member to unique integer value.
• C、 Set the Emit Default Value property of each data member to false.
• D、 Set the Is Required property of each data member to true.

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