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5. Use the Windows event log to log any conditions where the application causes processor utilization to go above a given threshold. 6. Include assertions throughout your code to ensure that all your assumptions are correct. 7. Enable tracing, and insert copious code to track all instances of exceptions and items that caused them.

1. Correct Answers: B and D A. Incorrect: Zone evidence is based on the location from which the assembly runs. It does not require a strong name. B. Correct: To provide the Strong Name evidence type, an assembly must be signed. C. Incorrect: Hash evidence is based on a unique signature generated using the assembly s binary. It does not require a strong name. D. Correct: To provide the Publisher evidence type, an assembly must be signed. 2. Correct Answer: B A. Incorrect: SocketPermission is related to networking; however, it is required for initiating raw TCP/IP connections rather than HTTP Web connections. B. Correct: You must have WebPermission to initiate HTTP requests to a Web server. C. Incorrect: You need DnsPermission to look up DNS addresses, which is often part of sending a Web request. However, it is not a requirement. D. Incorrect: ServiceControllerPermission controls the ability to start, stop, and pause services. 3. Correct Answer: D A. Incorrect: My_Computer_Zone uses the FullTrust permission set and offers the highest level of privileges. B. Incorrect: LocalIntranet_Zone uses the LocalIntranet permission set, which provides a moderately high level of privileges.

C. Incorrect: Internet_Zone uses the Internet permission set, which provides a very restrictive level of privileges. However, it is not as restrictive as Restricted_Zone. D. Correct: Restricted_Zone uses the Nothing permission set, which grants no privileges. 4. Correct Answer: A A. Correct: You can read the file because both your user account and the assembly s CAS allow reading the file. B. Incorrect: Although the assembly s CAS allows writing to the file, your user permissions restrict you to read access. C. Incorrect: Although the assembly s CAS allows changing the permissions of the file, your user permissions restrict you to read access. D. Incorrect: Although the assembly s CAS allows you to delete the file, your user permissions restrict you to read access.

1. Correct Answer: C A. Incorrect: The Everything permission set is sufficient for the application to run. B. Incorrect: The Everything permission set is sufficient for the application to run. C. Correct: The declarative permissions will not stop the assembly from reading the first line of the C:\boot.ini file. D. Incorrect: A security exception prior to execution would occur only if the administrator were running the assembly with a debugger and the request for UIPermission was removed. 2. Correct Answer: B A. Incorrect: The permissions are sufficient for the first line to be displayed, but the runtime throws an exception when the assembly attempts to access a file in the root of the C:\ drive. B. Correct: The runtime throws an exception when the assembly attempts to access a file in the root of the C:\ drive because the SecurityAction.Request-

Optional FileIOPermissionAttribute declaration refuses access to everything except for the C:\Temp folder. C. Incorrect: The SecurityAction.RequestOptional declarative permission refuses permission to the root of the C:\ drive. D. Incorrect: A security exception prior to execution would occur only if the administrator were running the assembly with a debugger and the request for UIPermission was removed. 3. Correct Answer: C A. Incorrect: There are no SecurityAction.RequestOptional requests. Therefore, the only permissions denied to the assembly are those listed with SecurityAction.RequestRefuse. B. Incorrect: There are no SecurityAction.RequestOptional requests. Therefore, the only permissions denied to the assembly are those listed with SecurityAction.RequestRefuse. C. Correct: The assembly has permission to read a file in the root of the C:\ drive because it has the Everything permission set, and the permission is not explicitly refused. D. Incorrect: A security exception prior to execution would occur only if the administrator were running the assembly with a debugger and the request for UIPermission was removed. 4. Correct Answer: C A. Incorrect: SocketPermission controls access to networking. This is not required for console applications. B. Incorrect: WebPermission controls access to HTTP requests. This is not required for console applications. C. Correct: UIPermission is required for console applications running with a debugger to enable the application to communicate with the debugger. D. Incorrect: FileIOPermission controls access to the file system. This is not required for console applications.