You have recently completed the creation of a new application.
Certkiller .com requires you to ensure that this new application creates a file that contains an array of bytes.
What should you do?（）

单项选择题Certkiller .com has asked you to create a file management application to monitor the hosts file. Certkiller .com has instructed you to change the hosts file if it has been changed. You, therefore, need to display the size and whether the hosts file is set to read-only. What should you do?（）

A.
B.
C.
D.

单项选择题Certkiller.com has asked you to create an application to display all of the top directories based on the drive path.You need to ensure that the application displays the number of files within top-level directories.What should you do?（）

A.
B.
C.
D.

单项选择题Certkiller .com has asked you to develop an application that displays the properties for all Certkiller.coms network drives. The information generated by this application will be utilized by Certkiller .coms network administrators to verify client setups. You need to ensure that these requirements are fully satisfied. What should you do?（）

A.
B.
C.
D.

单项选择题You have recently completely creating a new application for Certkiller .com. This new application has to load an instance of the Inventory class from a large file named Inventory.dat. You need to ensure that the application executes the loading process in as little time as possible. What should you do?（）

A.
B.
C.
D.

单项选择题you have recently written the code shown below: Hashtable emailAddresses = new Hashtable (); emailAddresses.Add ( Mia , mia@ Certkiller .com ); emailAddresses.Add ( Andy , andy@ Certkiller .com ); emailAddresses.Add ( Kara , kara@ Certkiller .com ); You need to ensure that these e-mail addresses are stored in the Email.dat file so that you can load them again when the user restarts the application. What should you do?（）

A.
B.
C.
D.