You use Visual Studio .NET to create an assembly, called XYZAssembly, that will be used by other applications, including a standard COM client application.

You must deploy your assembly on the COM application to a client computer. You must ensure that the COM application can instantiate components within the assembly as COM components.

What should you do?

A) Create a strong name of the assembly by using the Strong Name tool (Sn.exe). B) Generate a type library for the assembly by using the Type Library Importer (Tlbimp.exe). Register the file on the client computer.
C) Generate a registry file for the assembly by using the Assembly Registration tool (Regasm.exe) Register the file on the client computer. D) Deploy the assembly to the global assembly cache on the client computer. Add a reference to the assembly in the COM client application.

Answer:   C) Generate a registry file for the assembly by using the Assembly Registration tool (Regasm.exe) Register the file on the client computer.


The Assembly Registration tool reads the metadata within an assembly and adds the necessary entries to the registry, which allows COM clients to create .NET Framework classes transparently. Once a class is registered, any COM client can use it as though the class were a COM class..


Incorrect Answers:

Option A:
The Strong Name tool helps sign assemblies with strong names.

Option B:
The Type Library Importer, tlbimp.exe, converts the type definitions found within a COM type library into equivalent definitions in a common language runtime assembly. It would not be useful in this scenario however.

Option D:
This would not allow the COM application to use the class.


Programs from the same developer, sold bundled together, that provide better integration and share common features, toolbars and menus are known as_________ ?

A) integrated software packages B) personal information managers
C) software processing packages D) software suites
Answer & Explanation Answer: D) software suites

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What do you mean by APM ?


APM is abbreviated as Advanced Power Management, which was developed by Microsoft and Intel as an API. This API is mainly utilised for power management, and is very useful especially to those using Windows on their laptops or desktops.

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Both Joyel and Susy share a Windows 10 tablet with different user accounts. Joyel needs to access some files in Susy’s Documents folder. How can he do this ?

A) Joyel can access the files only if he has administrative rights B) Susy must choose to make the Documents folder Public for Joyel to see them
C) Joyel can, by default, see and access the files in any Documents folder on this computer D) Joyel cannot access those files without Susy moving them to another folder
Answer & Explanation Answer: A) Joyel can access the files only if he has administrative rights

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You develop an inventory management application called XYZManagement that will call a Microsoft SQL Server stored procedure named sp_GetDailyXYZSales. The stored procedure will run a query that returns your daily sales total as an output parameter. This total will be displayed to users in a message box.

Your application uses a SqlCommand object to run sp_GetDailyXYZSales. You write the
following code to call sp_GetDailyXYZSales:
SqlConnection cnn = new SqlConnection(myConnString);
SqlCommand cmd = new SqlCommand(“sp_GetDaily XYZ Sales”, cnn);
cmd.CommandType = CommandType.StoredProcedure;
SqlParameter prm = cmd.Parameters.Add(“@ItemTotal”,SqlDbType.Int);
prm.Direction = ParameterDirection.Output;

Now you must write additional code to access the output parameter. Which code segment should you use?

A) MessageBox.Show(?Total is: ? + cmd.Parameters[?@Output?].Value.ToString()); B) MessageBox.Show(?Total is: ? + cmd.Parameters[?@Output?].ToString());
C) MessageBox.Show(?Total is: ? + cmd.Parameters[?@ItemTotal? D) MessageBox.Show(?Total is: ? + cmd.Parameters[?@ItemTotal?
Answer & Explanation Answer: C) MessageBox.Show(?Total is: ? + cmd.Parameters[?@ItemTotal?


The @ItemTotal parameter is declared as an output parameter with SQL Server data type INT.We use the Value property of the SQLParameter class to retrieve the value of this parameter. We must also convert the INT value to a string value with the ToString method. We then supply this string to the MessageBox.Show method. 


Incorrect Answers

Option A, B:
The @ItemTotal parameter is the output parameter. Using @Output this way is incorrect. Output is a keyword and no variable named @Output has been declared.

Option D:
We must use the Value method to retrieve the value of the parameter..

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You develop an enterprise application, called XYZApplication that includes a Windows Form presentation layer, middle-tier components for business logic and data access, and a Microsoft SQL Server database.

You are in the process of creating a middle-tier component that will execute the data access routines in your application. When data is passed to this component, the component will call several SQL Server stored procedures to perform database updates. All of these procedure calls run under the control of a single transaction.

The code for the middle-tier component will implement the following objects:
SqlConnection cn = new SqlConnection();
SqlTransaction tr;

If two users try to update the same data concurrently, inconsistencies such as phantom reads will occur. You must now add code to your component to specify the highest possible level of protection against such inconsistencies.
Which code segment should you use?

A) tr = cn.BeginTransaction(?ReadCommitted?); B) tr = cn.BeginTransaction(IsolationLevel.ReadCommitted);
C) tr = cn.BeginTransaction(IsolationLevel.Serializable); D) tr = cn.BeginTransaction(?Serializable?);
Answer & Explanation Answer: C) tr = cn.BeginTransaction(IsolationLevel.Serializable);


Serializable is the highest isolation transaction level. It provide the highest possible level of protection against concurrent data errors. The correct syntax to begin a transaction with this transaction isolation level is: cn.BeginTransaction(IsolationLevel.Serializable)

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