What should you conclude?
You create Microsoft Windows-based applications. You are creating a mathematics educational application. The application will be used to teach students about numeric series. One of the methods in the application is used to calculate a given member of the Fibonacci series. The method uses recursive calls to perform its calculation. The application calls the method synchronously, and only one instance of the application can be running at a given time. The application requirements state that the method must take less than 5 seconds to process when calculating any of the first 30 members of the Fibonacci series. You profile the application by using instrumentation. During profiling, you perform a call on the method that is used for calculating the 30th member of the Fibonacci series. The profiling report, which shows elapsed time in milliseconds, is shown in the exhibit. (Click the Exhibit button.) You need to evaluate the performance of the application based on the established requirements.
What should you conclude?
What should you do?
You are an enterprise application developer. You are creating a component to process geospatial data. The component retrieves large sets of data from a Microsoft SQL Server database. Each data point consists of two decimal values: one value represents longitude and the other value represents latitude. You need to design a data format that minimizes the managed heap memory allocation needed for each data point within the component.
What should you do?
Which method should you use on the DirectorySecurity object?
You create a DirectorySecurity object for the working directory. You need to identify the user accounts and groups that have read and write permissions. Which method should you use on the DirectorySecurity object?
What should you conclude?
You create Microsoft Windows-based applications. You create a sales management application. The application stores sales data on a Microsoft SQL Server 2005 database that is maintained on a local server. The application retrieves data for analysis and permits users to make changes to the sales data. After the application is deployed, users report that the application takes too long to start. You run the application on your local computer to verify the performance and network usage. The performance chart is shown in the Performance exhibit and the network usage chart is shown in the Networking exhibit. (Click the Exhibit button.) You need to analyze the application code and evaluate the problem. What should you conclude?
What should you do?
You are an enterprise application developer. You create a component that exposes a static method. The static method performs a complex business algorithm and the method must support concurrent callers. You use asynchronous processing to implement the method. You need to ensure that the client application is notified about the completion of the method. What should you do?
Which code segment should you use?
You are developing an application that will use custom authentication and role-based security. You need to write a code segment to make the runtime assign an unauthenticated principal object to each running thread. Which code segment should you use?
should you conclude?
You create Microsoft Windows-based applications. You are creating a sales management application. The application will consume Web services to retrieve and save data to a database server. These Web services will be exposed to a partner extranet so that partners can write applications that will access the same data. The deployment diagram for the entire solution is as shown in the following exhibit. (Click the Exhibit button.) After deploying the solution, local users and partners report that they are not able to retrieve any data. You find that the client computers are able to access Web applications and Web services hosted by the Web server. You also find that the local applications are able to access other databases on the database server. You need to troubleshoot the issue. What
should you conclude?
Which action should you recommend?
You are an enterprise application developer. You are creating a financial application that includes a data access component. This component executes queries against a Microsoft SQL Server database. Application performance deteriorates as the volume of data in the database increases. You need to identify which database queries require the greatest time to execute. You need to minimize the impact on application performance while gathering this information. Which action should you recommend?
Which code segment should you use?
You are developing a method to hash data with the Secure Hash Algorithm. The data is passed to your method as a byte array named message. You need to compute the hash of the incoming parameter by using SHA1. You also need to place the result into a byte array named hash.
Which code segment should you use?
What should you recommend?
You create Microsoft Windows-based applications. You are responsible for evaluating the deployment of a product-pricing application. This application will be deployed on portable computers that are used by a team of sales personnel.
The application must meet the following requirements:
The application must run successfully on a dial-up connection.
Users need to run the application locally.
New features are added to the application on a monthly basis.
You need to provide a deployment solution that will ensure your users always have the latest version of the application when they connect to the corporate network. What should you recommend?