This webdemo is just a demo data, only for reference and learning, there is no other purposes.
QUESTION NO: 1 You are creating a class that uses unmanaged resources. This
class maintains references to managed resources on other objects. You need to
ensure that users of this class can explicitly release resources when the class instance
ceases to be needed. Which three actions should you perform? (Each correct answer
presents part of the solution. Choose three.)
A. Define the class such that it inherits from the WeakReference class.
B. Define the class such that it implements the IDisposable interface.
C. Create a class destructor that calls methods on other objects to release the managed
resources.
D. Create a class destructor that releases the unmanaged resources.
E. Create a Dispose method that calls System.GC.Collect to force garbage collection.
F. Create a Dispose method that releases unmanaged resources and calls methods on
other objects to release the managed resources.
Answer: B, D, F
QUESTION NO: 2 You are creating an undo buffer that stores data modifications.
You need to ensure that the undo functionality undoes the most recent data
modifications first. You also need to ensure that the undo buffer permits the
storage of strings only. Which code segment should you use?
A. Stack undoBuffer = new Stack();
B. Stack undoBuffer = new Stack();
C. Queue undoBuffer = new Queue();
D. Queue undoBuffer = new Queue();
Answer: A
QUESTION NO: 3 You need to create a method to clear a Queue named q. Which
code segment should you use?
A. foreach (object e in q) { q.Dequeue();}
B. foreach (object e in q) { Enqueue(null);}
C. q.Clear();
D. q.Dequeue();
Answer: C
QUESTION NO: 4 You are developing an application that stores data about your
company's sales and technical support teams. You need to ensure that the name and
contact information for each person is available as a single collection when a user
queries details about a specific team. You also need to ensure that the data collection
guarantees type safety. Which code segment should you use?
A. Hashtable team = new Hashtable();team.Add(1, "Hance");team.Add(2,
"Jim");team.Add(3, "Hanif");team.Add(4, "Kerim");team.Add(5, "Alex");team.Add(6,
"Mark");team.Add(7, "Roger");team.Add(8, "Tommy");
B. ArrayList team = new ArrayList(); team.Add("1, Hance");team.Add("2,
Jim");team.Add("3, Hanif");team.Add("4, Kerim");team.Add("5, Alex");team.Add("6,
Mark");team.Add("7, Roger");team.Add("8, Tommy");
C. Dictionary team = new Dictionary(); team.Add(1,
"Hance");team.Add(2, "Jim");team.Add(3, "Hanif");team.Add(4,
"Kerim");team.Add(5, "Alex");team.Add(6, "Mark");team.Add(7,
"Roger");team.Add(8, "Tommy");
D. string[] team = new string[] {"1, Hance", "2, Jim", "3, Hanif", "4, Kerim", "5,
Alex", "6, Mark", "7, Roger", "8, Tommy"};
Answer: C
QUESTION NO: 5 You are developing a custom-collection class. You need to
create a method in your class. You need to ensure that the method you create in
your class returns a type that is compatible with the Foreach statement. Which
criterion should the method meet?
A. The method must return a type of either IEnumerator or IEnumerable.
B. The method must return a type of IComparable.
C. The method must explicitly contain a collection.
D. The method must be the only iterator in the class.
Answer: A
QUESTION NO: 6 You are writing a custom dictionary. The custom-dictionary
class is named MyDictionary. You need to ensure that the dictionary is type safe.
Which code segment should you use?
A. class MyDictionary : Dictionary
B. class MyDictionary : HashTable
C. class MyDictionary : IDictionary
D. class MyDictionary { ... } Dictionary t = new Dictionary();MyDictionary dictionary = (MyDictionary)t;
Answer: A
QUESTION NO: 7 You are changing the security settings of a file named
MyData.xml. You need to preserve the existing inherited access rules. You also
need to prevent the access rules from inheriting changes in the future. Which
code segment should you use?
A. FileSecurity security = new FileSecurity("mydata.xml",
AccessControlSections.All);security.SetAccessRuleProtection(true,
true);File.SetAccessControl("mydata.xml", security);
B. FileSecurity security = new
FileSecurity();security.SetAccessRuleProtection(true,
true);File.SetAccessControl("mydata.xml", security);
C. FileSecurity security =
File.GetAccessControl("mydata.xml");security.SetAccessRuleProtection(true, true);
D. FileSecurity security =
File.GetAccessControl("mydata.xml");security.SetAuditRuleProtection(true,
true);File.SetAccessControl("mydata.xml", security);
Answer: A
QUESTION NO: 8 You are developing an application that will deploy by using
ClickOnce. You need to test if the application executes properly. You need to write
a method that returns the object, which prompts the user to install a ClickOnce
application. Which code segment should you use?
A. return ApplicationSecurityManager.ApplicationTrustManager;
B. return AppDomain.CurrentDomain.ApplicationTrust;
C. return new HostSecurityManager();
D. return SecurityManager.PolicyHierarchy();
Answer: A
QUESTION NO: 9 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?
A. AppDomain domain =
AppDomain.CurrentDomain;domain.SetPrincipalPolicy(PrincipalPolic
y.WindowsPrincipal);
B. AppDomain domain =
AppDomain.CurrentDomain;domain.SetThreadPrincipal(new
WindowsPrincipal(null));
C. AppDomain domain = AppDomain.CurrentDomain;
domain.SetAppDomainPolicy( PolicyLevel.CreateAppDomainLevel
());
D. AppDomain domain =
AppDomain.CurrentDomain;domain.SetPrincipalPolicy( Prin
cipalPolicy.UnauthenticatedPrincipal);
Answer: D
QUESTION NO: 10 You are writing code for user authentication and
authorization. The username, password, and roles are stored in your application
data store. You need to establish a user security context that will be used for
authorization checks such as IsInRole. You write the following code segment to
authorize the user.
if (!TestPassword(userName, password))
throw new Exception("could not
authenticate user"); String[]
userRolesArray =
LookupUserRoles(userName);
You need to complete this code so that it establishes the user security
context. Which code segment should you use?
A. GenericIdentity ident = new GenericIdentity(userName);GenericPrincipal
currentUser = new GenericPrincipal(ident,
userRolesArray);Thread.CurrentPrincipal = currentUser;
B. WindowsIdentity ident = new
WindowsIdentity(userName);WindowsPrincipal currentUser = new
WindowsPrincipal(ident);Thread.CurrentPrincipal = currentUser;
C. NTAccount userNTName = new
NTAccount(userName);GenericIdentity ident = new
GenericIdentity(userNTName.Value);GenericPrincipal currentUser= new
GenericPrincipal(ident, userRolesArray);Thread.CurrentPrincipal =
currentUser;
D. IntPtr token = IntPtr.Zero;token = LogonUserUsingInterop(userName,
encryptedPassword);WindowsImpersonationContext ctx =
WindowsIdentity.Impersonate(token);
Answer: A
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