You create Microsoft Windows-based applications. You are creating a method. Your applications will call the method multiple times. You write the following lines of code for the method.

public string BuildSQL(string strFields, string strTable, string strFilterId) {
string sqlInstruction = “SELECT “;
sqlInstruction += strFields;
sqlInstruction += ” FROM “;
sqlInstruction += strTable;
sqlInstruction += ” WHERE id =”;
sqlInstruction += strFilterid;
return sqlInstruction;
}

The method generates performance issues. You need to minimize the performance issues that the multiple string concatenations generate.
What should you do?

You create Microsoft Windows-based applications. You are creating a stock trading application. The application keeps track of stock prices and raises events when the stock prices increase or decrease. The events are raised based on specific thresholds. When the events are raised, users specify whether to buy, sell, or hold the stocks. The stock trading application currently uses the Trace class to log the events raised by the application and the user responses. The raised events and the user responses are then logged to a Windows application log. You change the application logging mechanism to meet the following requirements:

Log entries are saved in a central database.
Log entries are also saved to the local application log.
Other applications are able to use the same logging mechanism.
The application code is changed as little as possible.

You create a central database to store log entries for multiple databases. You need to choose a system-wide logging mechanism that is reused by the application and is a part of the application design structure.
What should you do?

You create Microsoft Windows-based applications. The sales department uses an application that accesses data from a local Microsoft Office Access database. To enable sales representatives to access the application when they are not in the office, you plan to install the application on a terminal server. The application will be accessed by 200 users simultaneously through a terminal services connection. You need to design an appropriate test strategy for the change.
Which two tests should you choose? (Each correct answer presents part of the solution. Choose two.)