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Q21. You need an application that updates the inventory every morning when you log in to the workstation. If an error occurs during update, the application needs to log messages to a text file. The application doesn’t need any user interaction. You want to automate the process that launches the application. You want to minimize the efforts for developing, installing, and updating the application. Which type of application should you create?
A. Windows Service
B. Windows Form
C. Web Form
D. console application
Answer: D
Q22. You are invoking a Web service method that returns an ArrayList object. The client application is written is C#, whereas the Web service is written in Visual Basic. The Web service is outside your corporate firewall. You receive an "object not found" error when you call the method that returns the ArrayList object but can call other methods successfully from the same Web service. What could be the problem?
A. The client and the Web service are not written in the same programming language.
B. The firewall is blocking all SOAP calls.
C. The client project does not contain a reference to the System.Collection namespace.
D. The ArrayList class cannot be serialized.
Answer: C
Q23. Suppose that you defined a class Scenario that defines functionality for running customized pivot transform on large data sets. You do not want the functionality of this class to be inherited into derived classes. What keyword should you use to define the Scenario class?
A. sealed
B. abstract
C. private
D. internal
Answer: A
Q24. You have completed developing several major features of a new software application. You plan to provide an early look at the product to important customers to gather some early feedback. Your application still misses features and you haven’t yet optimized the application for performance and security. Which kind of testing should you perform with a limited number of important customers?
A. white-box testing
B. black-box testing
C. alpha testing
D. beta testing
Answer: C
Q25. You need a Windows Form similar to the W_RecForm form that is being already used by the application. However, you need a couple of extra controls on your form that are not available on W_RecForm. You need to make sure that you accomplish this requirement with the least coding effort. In future, if the W_RecForm is enhanced, you need to make sure that those enhancements are available in your form as well. What should you do?
A. Copy the code for W_RecForm to a new form. Modify the code for the new form.
B. Use visual inheritance to inherit the new form from W_RecForm. Add the new functionality to the newcontrol.
C. Modify the code for W_RecForm. Copy the code to create a new form.
D. Convert the code in the W_RecForm to a custom control. Use the new custom control in all places.
Answer: B
Q26. You need to provide complex multi-way branching in your C# program. You need to make sure that your code is easy to read and understand. Which of the following C# statements should you use?
A. case
B. break
C. if-else
D. switch
Answer: D
Q27. You have developed a Windows Forms application that stockbrokers will use. The stockbrokers need to view data for multiple stocks at the same time. You need to change the display and behavior of a Windows Form so that it can contain multiple child windows. What should you do?
A. Set the IsMdiChild property of the form.
B. Set the MdiParent property for all the child windows.
C. Set the MdiChild property of the form.
D. Set the IsMdiContainer property of the form to true.
Answer: D
Q28. You are developing an application that stores data in SQL Server 2005 database. You need to write a query that retrieves all orders in the orders table that were placed on January 1, 2011. You write the following query:
SELECT * FROM Orders
WHERE OrderDate = 01/01/2011
The statement executes without any error but does not return any data. You are certain that the database contains order from this date. How should you correct the SQL statement?
A. SELECT * FROM Orders
WHERE OrderDate = #01/01/2011#
B. SELECT * FROM Orders
WHERE OrderDate = %01/01/2011%
C. SELECT * FROM Orders
WHERE OrderDate = '01/01/2011'
D. SELECT * FROM Orders
WHERE OrderDate = "01/01/2011"
Answer: C
Q29. Suppose that you are writing code for a class named Product. You need to make sure that the data members of the class are initialized to their correct values as soon as you create an object of the Product class. The initialization code should always be executed. What should you do?
A. Create a static method in the Product class to initialize data members.
B. Create a constructor in the Product class to initialize data members.
C. Create a static property in the Product class to initialize data members.
D. Create an event in the Product class to initialize data members.
Answer: B
Q30. You are writing a C# program that needs to iterate a fixed number of times. You need to make sure that your code is easy to understand and maintain even when the loop body contains complex code. Which of the following C# statements provide the best solution for this requirement?
A. while
B. for
C. for each
D. do-while
Answer: B
