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【单选题】

Click the Exhibit button and examine the data in the EMPLOYEES table.<br /> On the EMPLOYEES table, EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID. The JOB_ID column is a NOT NULL column.<br /> Evaluate this DELETE statement:<br /> DELETE employee_id, salary, job_id<br /> FROM employees<br /> WHERE dept_id = 90;<br /> Why does the DELETE statement fail when you execute it?（）<img src="https://nimg.ppkao.com/2018-08/zhangxu/2018080111434419359.jpg?sign=dbef99a3233a79b4a7fb6cad4bd1b5c7&t=62d7c958" />

A、There is no row with dept_id 90 in the EMPLOYEES table.

B、You cannot delete the JOB_ID column because it is a NOT NULL column.

C、You cannot specify column names in the DELETE clause of the DELETE statement.

D、You cannot delete the EMPLOYEE_ID column because it is the primary key of the table.

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更多“ Click the Exhibit button and examine the data in the EMPLOYEES table.<br /> On the EMPLOYEES table, EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID. The JOB_ID column is a NOT NULL column.<br /> Evaluate this DELETE statement:<br /> DELETE employee_id, salary, job_id<br /> FROM employees<br /> WHERE dept_id = 90;<br /> Why does the DELETE statement fail when you execute it?（）<img src="https://nimg.ppkao.com/2018-08/zhangxu/2018080111434419359.jpg?sign=dbef99a3233a79b4a7fb6cad4bd1b5c7&t=62d7c958" />”相关的问题
第1题
[单选题] Click the Exhibit button. In the exhibit, what is the priority for Router B in VRRP group 100?（）

A、1&nbsp;&nbsp;B、100&nbsp;&nbsp;C、110&nbsp;&nbsp;D、255&nbsp;&nbsp;

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第2题
[] Click the Exhibit button. Given the configuration shown in the exhibit, which configuration object would be used to associate both Nancy and Walter with firewall user authentication within a security policy?（） Click the Exhibit button. Given the configuration shown in the exhibit, which configuration object would be used to associate both Nancy and Walter with firewall user authentication within a security policy?（）

A、A. ftp-group&nbsp;&nbsp;B、B. ftp-users&nbsp;&nbsp;C、C. firewall-user&nbsp;&nbsp;D、D. nancy and walter&nbsp;&nbsp;

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第3题
[] Click the Exhibit button. What is the result? （） Click the Exhibit button. What is the result? （）

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

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第4题
[单选题] Click the Exhibit button. Which type of protection is shown in the exhibit?（）

A、1+0&nbsp;&nbsp;B、1+1&nbsp;&nbsp;C、1：1&nbsp;&nbsp;D、1：N&nbsp;&nbsp;

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第5题
[单选题] Click the Exhibit button. What is the output of the program shown in the exhibit?（）

A、300-100-100-100-100&nbsp;&nbsp;B、300-300-100-100-100&nbsp;&nbsp;C、300-300-300-100-100&nbsp;&nbsp;D、300-300-300-300-100&nbsp;&nbsp;

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第6题
[] Click the Exhibit button. Which statement is true about the classes and interfaces in the exhibit?（） Click the Exhibit button. Which statement is true about the classes and interfaces in the exhibit?（）

A、A.Compilation will succeed for all classes and interfaces.&nbsp;&nbsp;B、B.Compilation of class C will fail because of an error in line 2.&nbsp;&nbsp;C、C.Compilation of class C will fail because of an error in line 6.&nbsp;&nbsp;D、D.Compilation of class AImpl will fail because of an error in line 2&nbsp;&nbsp;

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第7题
[] Click the Exhibit button. Referring to the exhibit, you are not able to telnet to 192.168.10.1 from client PC 192.168.10.10.What is causing the problem?（） Click the Exhibit button. Referring to the exhibit, you are not able to telnet to 192.168.10.1 from client PC 192.168.10.10.What is causing the problem?（）

A、A. Telnet is not being permitted by self policy.&nbsp;&nbsp;B、B. Telnet is not being permitted by security policy.&nbsp;&nbsp;C、C. Telnet is not allowed because it is not considered secure.&nbsp;&nbsp;D、D. Telnet is not enabled as a host-inbound service on the zone&nbsp;&nbsp;

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第8题
[单选题] Click the Exhibit button. In the exhibit, if the link we are measuring is 1.5 Mbps, what is the effective WAN bandwidth?（）

A、0.947 Mbps&nbsp;&nbsp;B、3.000 Mbps&nbsp;&nbsp;C、4.065 Mbps&nbsp;&nbsp;D、282.058 Mbps&nbsp;&nbsp;

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第9题
[单选题] Click the Exhibit button. In the exhibit, if the link we are measuring is 1.5 Mbps, what is the effective WAN bandwidth?（）

A、0.947 Mbps&nbsp;&nbsp;B、3.000 Mbps&nbsp;&nbsp;C、4.065 Mbps&nbsp;&nbsp;D、282.058 Mbps&nbsp;&nbsp;

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第10题
[单选题] Exhibit: You are developing a Web application. The Web application uses a GridView control to display data. You build your Web Forms for the Web application by dragging and dropping tables from the Data Connections tree in Server Explorer. You need to add a connection to your data by using the Add Connection dialog box as shown in the exhibit. During the process, you need to configure the .NET Data Provider that you use to create the data source objects. What should you do?（）

A、Right-click the connection, and click Properties. Modify the Provider property of the data connection.&nbsp;&nbsp;B、Click the Change button, and change the data provider for the selected data source.&nbsp;&nbsp;C、Click the Advanced button, and change the Data Source property to the target provider.&nbsp;&nbsp;D、Click the Advanced button, and change the Application Name property to the target provider.&nbsp;&nbsp;

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