Mcpd 70-536

Front 1

What method causes settings to be read from an IConfigurationSectionHandler object

Back 1

Create

Create is the only method that needs to be impl'ed in this interface

Front 2

how do you force changes in a StreamWriter to be sent to the stream it is writing to

Back 2

Any of :
- Close
- AutoFlush of StreamWriter to true
- Flush

Front 3

What is MarshelAs attribute for?

Back 3

The purpose of it is type mapping by explicitly defining relationships (although it is not always necessary).

Front 4

Which encoding types support Chinese?

Back 4

UTF-8
UTF-16
UTF-32

Front 5

Can Path.ChangeExtension change file extension to the file system?

Back 5

No. It only deals with the string of a path

Front 6

How to open or create (if not existing) a file stream for writing?

Back 6

- Create a FileStream instance with FileMode.OpenOrCreate

or

- File.Open with FileMode.OpenOrCreate

Front 7

What is necessary to make an assembly visible to a COM component?

Back 7

- Set ComVisible to true for any class members you want visible
- Set ComVisible to true for any classes you want visible
- Set "Register for COM" option under the build configuration
- Set ComVisible to false for any class members you want hidden

Front 8

what types of collection you can make from CollectionUtil

Back 8

- case-insensitive SortedList
- case-insensitive Hashtable

Not

- Culture-invariant Hashtable
- Case-insensitive StringDictinary

Front 9

Which classes or interfaces can be used to provide custom configuration manipulation?

Back 9

Option1.
IConfigurationSectionHandler
example:
public class MyHandler : IConfigurationSectionHandler
{
#region IConfigurationSectionHandler Members

object IConfigurationSectionHandler.Create(
object parent, object configContext, XmlNode section)
{
throw new Exception("The method is not implemented.");
}

#endregion
}

Option2.

ApplicationSettingsBase

example:

//Application settings wrapper class
sealed class FormSettings : ApplicationSettingsBase
{
[UserScopedSettingAttribute()]
public String FormText
{
get { return (String)this["FormText"]; }
set { this["FormText"] = value; }
}

[UserScopedSettingAttribute()]
[DefaultSettingValueAttribute("0, 0")]
public Point FormLocation
{
get { return (Point)(this["FormLocation"]); }
set { this["FormLocation"] = value; }
}

[UserScopedSettingAttribute()]
[DefaultSettingValueAttribute("225, 200")]
public Size FormSize
{
get { return (Size)this["FormSize"]; }
set { this["FormSize"] = value; }
}


[UserScopedSettingAttribute()]
[DefaultSettingValueAttribute("LightGray")]
public Color FormBackColor
{
get { return (Color)this["FormBackColor"]; }
set { this["FormBackColor"] = value; }
}

}

Option 3. ConfigurationSection (see other flashcard)

Front 10

Can ConfigurationValidatorBase or IConfigurationSystem be used to provide custom configuration manipulation?

Back 10

No.

ConfigurationValidatorBase is used to create a custom validator. A custom validator can be used to verify object values.
e.g. CallbackValidator, DefaultValidator, IntegerValidator, LongValidator, StringValidator, etc.

IConfigurationSystem is not intended to be used directly from your code.

Front 11

How do you specify a stream into which to write compressed data with DeflateStream class?

Back 11

when creating the instance of the class with the constructor.

e.g

DeflateStream compressedzipStream = new DeflateStream(theStream , CompressionMode.Compress, bLeaveStreamOpenOrNot);

Front 12

Which method to use to determine if the current assembly has a specific permission without throwing an exception?

Back 12

SecurityManager.IsGranted(permission)

Front 13

Is EventHandler is generic type?

Back 13

Yes.

Example:

public class MyEventArgs : EventArgs
{
private string msg;

public MyEventArgs(string messageData)
{
msg = messageData;
}
public string Message
{
get { return msg; }
set { msg = value; }
}
}

class Program
{
// Declare an event of delegate type EventHandler of
// MyEventArgs.





public static event EventHandler<MyEventArgs> SampleEvent;
public static void Main()
{
ListenEvent le = new ListenEvent();
SampleEvent += new EventHandler<MyEventArgs>(ListenEvent.SampleEventHandler);
OnDemoEvent("Hey there, Bruce!");
OnDemoEvent("How are you today?");
OnDemoEvent("I'm pretty good.");
OnDemoEvent("Thanks for asking!");
}

public static void OnDemoEvent(string val)
{
// Copy to a temporary variable to be thread-safe.
EventHandler<MyEventArgs> temp = SampleEvent;
if (temp != null)
temp(null , new MyEventArgs(val));
}

}

Front 14

What should be done to use a structure for a given P/invoke call?

Back 14

Step1. Define the structure
Step2. (Optional) use SizeOf of System.Runtime.Marshal
Step3. (Optional) use StructLayout attribute if positioning within the structure is important

Front 15

Size limitation on GZipStream compress?

Back 15

Any data/file no larger than 4GB

Front 16

What permissions required for all console applications running with a debugger

Back 16

UIPermission

Front 17

Give Two ways to run an assembly as if it were located on the Internet

Back 17

Option 1.

//C#
object[] hostE = {new Zone[SecurityZone.Internet]};
Evidence = new Evidence(hostE, null);
AppDomain myDomain = AppDomain.CreateDomain("MyDomain", e);
d.ExecuteAssembly("Assembly.exe");

Option 2.
//C#, use ExecuteAssembly method

Evidence e = new Evidence();
e.AddHost(new Zone(SecurityZone.Internet));
AppDomain ap = AppDomain.CreateAppDomain("MyDomain");
ap.ExecuteAssembly("Assembly.exe", e);

Front 18

What class allow dynamic creation of assembly?

Back 18

AppDomain

(because appdomain returns assembly builder which returns modulebuilder ...)

Front 19

How to easily perform case-insensitive string comparison?

Back 19

Passing CompareOptions.IgnoreCase to Compare method of CompareInfo instance

Front 20

What methods can be used to revert security restrictions?

Back 20

// Causes all previous overrides for the current frame to be removed and no longer in effect.
CodeAccessPermission.RevertAll()
// Prevents callers higher in the call stack from using the code that calls this method to access all resources except for the resource specified by the current instance
CodeAccessPermssion.RevertPermitOnly()

Front 21

Which methods allow COM components to be used in .NET applications

Back 21

1. Ensure that the app is registered using the RegSvr tool if necessary, Then either add a reference to it from the COM tab of the Add Reference dialog box or use TblImp.exe. OR
2. Add a reference to the component thru VS 2005
OR
3. Use the Type Library Import Tool (Tbllmp.exe)

Front 22

What tool is used to create a COM consumable type?

Back 22

TlbExp.exe

Front 23

How do you make sure to isolate trace from one logic operation from the other?

Back 23

use CorrelationManager object to keep each trace isolated

Front 24

What's the requirements for a class to be able to serialize to XML?

Back 24

1. parameterless constructor AND
2. public

Front 25

Is typed declared Nullable reference type?

Back 25

Not necessary.

Example:

Nullable<int> i = null;

Front 26

How to get the current culture of the application

Back 26

Option 1.

Thread.CurrentThread.CurrentCulture OR

Option2.
Create an instance of the CultureInfo class using a specific culture, and check the CurrentCulture property

Front 27

What the .NET Framework 2.0 Configuration tool can do?

Back 27

View all assemblies in GAC, AND
View all configured applications

Front 28

Acceptable ways to open a file for writing?

Back 28

File.Open("some.txt", FileMode.Create); OR
File.Open("some.txt", FileMode.Create. FileAccess.Write); OR
FileInfo file = new FileInfo("some.txt");
file.Open(FileMode.Create);

Front 29

How to open configure file using ConfigurationManager?

Back 29

openExeConfiguration
openMachineConfiguration
openMappedExeConfiguration
openMappedMachineConfiguration

Front 30

What methods can be used to create new IsolatedStorageFile object?

Back 30

GetStore
GetMachineStoreForAssembly
GetUserStoreForAssemly

Front 31

what types to store fractional numbers in .NET?

Back 31

double, float, decimal(128bit or 16bytes)

Front 32

How to start a service?

Back 32

// use ServiceController - instance method
ServiceController sc= new ServiceController("Server");
sc.Start();

Front 33

Given a type, what the ways to get all methods of it? which is the most efficient way?

Back 33

Option 1.
Type myType = Type.GetType("MyTypeName");
MethodInfo[] mis = myType.GetMethods();
foreach(MethodInfo mi in mis) {
// list them ...Name
}

Option 2.

Type myType = Type.GetType("MyTypeName");
MemberInfo[] mis = myType.getMembers();
foreach(MemberInfo mi in mis) {
if (mi.MemberType = MemberTypes.Method) {
// list ....Name
}

Option 1 is the most efficient
}

Front 34

Does StringBuilder allow "+" and "+="?

Back 34

No.

Example:

string s = null;
StringBuilder sb = null;
sb.Append("Hello");
sb.Append(", World!");
s = sb.ToString();

Front 35

How to bind the reference of classes from 3rd party assembly to its diffrent (newer) version?

Back 35

By using .NET Framework 2.0 Configuration tool. The binding redirection or binding policy feature, under MyComputer -> Configured Assemlies (which are under GAC)

Front 36

A class (i.e. impl ISerializable) that supports custom serialization must provide constructor like xxx(SerializationInfo, StreamingContext) for deserialization purpose, where the data for de/serialization from? example?

Back 36

The data is from SerializationInfo's GetValue method. StreamingContext just provides the source that has the serialized data.

Front 37

What's the purpose of SerializationInfo?

Back 37

to store all the data needed to serialize or deserialize an object. This class cannot be inherited. such as name, type and data for each piece of info that serialized/deserialized.

Add/GetValue() // by name/type
Set/GetType() // of current instance

Front 38

What's the purpose of StreamingContext?

Back 38

Describes the source and destination of a given serialized stream, as well as a means for serialization to retain that context.

properties:
State: During serialization, the destination of the transmitted data. During deserialization, the source of the data.

Context: additional context

Front 39

Meaning of FullControl, Modify

Back 39

FullControl/Allow: can modify the file/dir and its permissions

Modify/Allow: can edit but cannot change its permssions (i.e. FullControl/Allow + ChangePermissions/Deny)

Front 40

RegEx -- Groups start from 0 or 1?

Back 40

1

Front 41

DriveInfo:
1. How to get C drive's type?
2. Does it have GetDriveType() static method?
3. DriveInfo.GetDrives example?

Back 41

1.

DriveInfo di = new DriveInfo(@"C");
return di.DriveType == DriveType.Fixed;

2. No

3.

using System;
using System.IO;

class Test
{
public static void Main()
{
DriveInfo[] allDrives = DriveInfo.GetDrives();

foreach (DriveInfo d in allDrives)
{
Console.WriteLine("Drive {0}", d.Name);
Console.WriteLine(" File type: {0}", d.DriveType);
if (d.IsReady == true)
{
Console.WriteLine(" Volume label: {0}", d.VolumeLabel);
Console.WriteLine(" File system: {0}", d.DriveFormat);
Console.WriteLine(
" Available space to current user:{0, 15} bytes",
d.AvailableFreeSpace);

Console.WriteLine(
" Total available space: {0, 15} bytes",
d.TotalFreeSpace);

Console.WriteLine(
" Total size of drive: {0, 15} bytes ",
d.TotalSize);
}
}
}
}
/*
This code produces output similar to the following:

Drive A:\
File type: Removable
Drive C:\
File type: Fixed
Volume label:
File system: FAT32
Available space to current user: 4770430976 bytes
Total available space: 4770430976 bytes
Total size of drive: 10731683840 bytes
Drive D:\
File type: Fixed
Volume label:
File system: NTFS
Available space to current user: 15114977280 bytes
Total available space: 15114977280 bytes
Total size of drive: 25958948864 bytes
Drive E:\
File type: CDRom

The actual output of this code will vary based on machine and the permissions
granted to the user executing it.
*/

Front 42

What's managed classes corresponding to the following unmanaged classes:

HANDLE,
LPSTR,
WORD,
INT/LONG/BOOL,
DOUBLE

Back 42

HANDLE: IntPtr
LPSTR: String
WORD: UInt16
INT/LONG/BOOL: Int32
DOUBLE: Double

Front 43

Why Isolated storage should not be used for high-value secrets? What data is it suitable for?

Back 43

isolated storage is not protected from highly-trusted code, unmanaged code, trusted users of the computer.

It is suitable for per-user or user preference data (not configuration settings because admin does not control them)

Front 44

To create a custom trust manager to determine if a app can be exe'ed and what permissions should be granted, what IF should be impl'ed?

Back 44

IApplicationTrustManager

.DetermineApplicationTrust

Front 45

How to create an custom uninstall?

Back 45

Step1. Create a new AssemblyInstaller or ComponentInstaller
Step2. Specify the name of the assembly or application
Step3. Call the Uninstall method

Front 46

What can/cannot marshaled between managed and unmanaged code?

Back 46

cannot: generic types
can: arrays, booleans, char types, delegates, classes, objects, strings, structures

Front 47

What is IAsyncResult.AsyncState for?
What param a AsyncCallback delegate receive?

Back 47

It is for storing the object for the completed request; it has to be cast to the proper type.

one param: IAsyncResult object.

Front 48

What the difference of comparing object in VB and C#?

Back 48

VB: the value (content) of objects (e.g. string)

C#: the reference of objects (e.g. even the "string comparison" result is true)