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- Question
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?
Options- 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.
- Correct Answer
- Generate a registry file for the assembly by using the Assembly Registration tool (Regasm.exe) Register the file on the client computer.
ExplanationThe 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. - 1. You create an assembly by using Visual Studio .NET. The assembly is responsible for writing and reading order entry information to and from an XML data file. The assembly also writes and reads values to and from the Windows registry while it is being consumed. The assembly will be distributed to client computers by using your company, XYZ, intranet. All client computers are configured to implement the default .NET security policy. You need to implement security in the assembly. What should you do?
Options- A. Implement declarative security and execute the permission demand to allow access to the file system and Windows registry.
- B. Implement declarative security and execute the minimum permission request to allow access to the file system and Windows registry.
- C. Implement imperative security and execute the permission demand to allow access to the file system and Windows registry.
- D. Implement imperative security and execute the minimum permission request to allow access to the file system and Windows registry. Discuss
- 2. You use Visual Studio .NET to create a Windows-based application. The application includes a form named XYZProcedures (EXP). EXP allows users to enter very lengthy text into a database. When users click the Print button located on EXP, this text must be printed by the default printer. You implement the printing functionality by using the native .NET System Class Libraries with all default settings. Users report that only the first page of the text is being printed. How should you correct this problem?
Options- A. In the BeginPrint event, set the HasMorePages property of the PrintEventArgs object to True.
- B. In the EndPrint event, set the HasMorePages property of the PrintEventArgs object to True.
- C. In the PrintPage event, set the HasMorePages property of the PrintPageEventArgs object to True.
- D. In the QueryPageSettings event, set the HasMorePages property of the QueryPageSettingEventArgs object to True. Discuss
- 3. You responsible for maintaining an application that was written by a former colleague at XYZ. The application reads from and writes to log files located on the local network. The original author included the following debugging code to facilitate maintenance: try { Debug.WriteLine(?Inside Try?); throw(new IOException());} catch (IOException e) { Debug.WriteLine (?IOException Caught?);} catch (Exception e) { Debug.WriteLine(?Exception Caught?);}. finally { Debug.WriteLine (?Inside Finally?);} Debug.WriteLine (?After End Try?); Which output is produced by thus code?
Options- A. Inside Try Exception Caught IOException Caught Inside Finally After End Try
- B. Inside Try Exception Caught Inside Finally After End Try
- C. Inside Try IOException Caught Inside Finally After End Try
- D. Inside Try IOException Caught Inside Finally Discuss
- 4. You develop a Windows-based application that enables to enter product sales. You add a subroutine named XYZ. You discover that XYZ sometimes raises an IOException during execution. To address this problem you create two additional subroutines named LogError and CleanUp. These subroutines are governed by the following rules: ? LogError must be called only when XYZ raises an exception. ? CleanUp must be called whenever XYZ is complete. You must ensure that your application adheres to these rules. Which code segment should you use?
Options- A. try { XYZ(); LogError(); } catch (Exception e) { CleanUp(e); }
- B. try { XYZ(); } catch (Exception e) { LogError(e); CleanUp(); }
- C. try { XYZ(); } catch (Exception e) { LogError(e); } finally { CleanUp(); }
- D. try { XYZ(); } catch (Exception e) { CleanUp(e); } finally { LogError(); } Discuss
- 5. You work as software developer at XYZ inc. You need to develop a Windows form that provides online help for users. You want the help functionality to be available when users press the F1 key. Help text will be displayed in a pop-up window for the text box that has focus. To implement this functionality, you need to call a method of the HelpProvider control and pass the text box and the help text. What should you do?
Options- A. SetShowHelp
- B. SetHelpString
- C. SetHelpKeyword
- D. ToString Discuss
- 6. 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?
Options- A. tr = cn.BeginTransaction(?ReadCommitted?);
- B. tr = cn.BeginTransaction(IsolationLevel.ReadCommitted);
- C. tr = cn.BeginTransaction(IsolationLevel.Serializable);
- D. tr = cn.BeginTransaction(?Serializable?); Discuss
- 7. 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; cnn.Open(); cmd.ExecuteNonQuery(); Now you must write additional code to access the output parameter. Which code segment should you use?
Options- 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? Discuss
- 8. You have a computer named Computer1 that runs Windows 7. You need to ensure that Computer1 can connect to File Transfer Protocol (FTP) servers only while it is connected to a private network. What should you do?
Options- A. From Windows Firewall with Advanced Security, create a new rule.
- B. From the local Group Policy, modify the application control policies.
- C. From Windows Firewall, modify the Allowed Programs and Features list.
- D. From Network and Sharing Center, modify the Advanced Sharing settings. Discuss
- 9. How many-shares of market value RS.25 each can be purchased for Rs.12750, brokerage being 2% ?
Options- A. Rs.450
- B. Rs.500
- C. Rs.550
- D. Rs.600 Discuss
- 10. You are the database administrator for a financial services company. Employees enter data 24 hours a day into a SQL Server 2000 database. These employees report slower response times when new account information is gathered from branch offices and added to the database. You currently use the following BULK INSERT statement to add the account information.BULK INSERT finance.dbo.customersFROM 'd:bulkaccts143_10142000.txt'WITH DATAFILETYPE = 'char', FIELDTERMINATOR = 't', ROWTERMINATOR = 'n', TABLOCK You want to ensure that response times do not slow when new account information is added to the database. What should you do?
Options- A. Add the BATCHSIZE option to the BULK INSERT statement, and then set the option equal to 10 percent of the number of rows to be loaded.
- B. Add the ROWS_PER_BATCH option to the BULK INSERT statement, and then set the option equal to 10 percent of the number of rows to be loaded.
- C. Drop the indexes for the Customers table before the data load, and then re-create the indexes after the data load is complete.
- D. Remove the TABLOCK option from the BULK INSERT statement. Discuss
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Correct Answer: Implement declarative security and execute the minimum permission request to allow access to the file system and Windows registry.
Explanation:
You can use declarative code access security to request permissions for the entire assembly. SecurityAction flags that can be specified in an assembly-wide directive. When SecurityAction.RequestMinimum is specified, it makes a request to the common language runtime to be granted the requested permission. If the requested permission is not granted by the security policy, the assembly will not execute. A Security Action.RequestOptional is similar, but the assembly will still run even if the requested permission is not granted. Specifying security Action. RequestRefuse requests that the assembly be denied the specified permission.
You must use the Assembly (assembly) directive when specifying these actions as follows:
Option A:
There are only three Security actionAttributes targets for an assembly: RequestMinimumAssembly, RequestOptionalAssembly, and RequestRefuseAssembly.
Option C, D:
Imperative security does not work well to configure security for an entire assembly. In imperative security, permission to execute is demanded at run time.
Correct Answer: In the PrintPage event, set the HasMorePages property of the PrintPageEventArgs object to True.
Explanation:
PrintDocument.PrintPage Event occurs when the output to print for the current page is needed. This event has the HasMorePages property which gets or sets a value indicating whether an additional page should be printed.
Correct Answer: Inside Try IOException Caught Inside Finally After End Try
Explanation:
First the try code runs. Then one single exception, the IOException occurs, not two exceptions.Then the Finally code segments executes. After Finally code bas been executed normal application resumes at the next line after the line that called the error. In this case, the After End Try code runs.
Correct Answer: try { XYZ(); } catch (Exception e) { LogError(e); } finally { CleanUp(); }
Explanation:
We must use a try?catch?finally construct. First we run the Comapany() code in the try block.Then we use the LogError() subroutine in the catch statement since all exceptions are handled here. Lastly we put the CleanUp() subroutine in the finally statement since this code will be executed regardless of whether an exception is thrown or not.
Correct Answer: SetHelpString
Explanation:
To associate a specific Help string with another control, use the SetHelpString method. The string that you associate with a control using this method is displayed in a pop-up window when the user presses the F1 key while the control has focus.
Correct Answer: tr = cn.BeginTransaction(IsolationLevel.Serializable);
Explanation:
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)
Correct Answer: MessageBox.Show(?Total is: ? + cmd.Parameters[?@ItemTotal?
Explanation:
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..
Correct Answer: From Windows Firewall with Advanced Security, create a new rule.
Correct Answer: Rs.500
Explanation:
CP. of each share= Rs.(25 + 2% of 25) = Rs.25.50.
Number of shares= = 500
Correct Answer: Remove the TABLOCK option from the BULK INSERT statement.
Explanation:
The TABLOCK hint increases the number of locks during the adding process. This is the reason why response time are slows down during this process. By removing the TABLOCK hint the default more granular row-level lock will be used. This would decrease the scope of the locks which would result in less waiting jobs and performance would improve.
Note: The BULK INSERT statement is used to copy a data file into a database table or view in a format specified by the user. The BULK INSERT statement accepts the TABLOCK hint, which allows the user to specify the locking behavior that the BULK INSERT statement should use. TABLOCK specifies that a bulk update table-level lock is taken for the duration of the bulk copy. If TABLOCK is not specified, the default uses row-level locks.
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