70 NOT Answered Yet Test Questions:
(hold
on, will be updated soon)
1. What does the OrElse operator do?
Answers:
•
It
performs a Boolean OR operation, evaluating both operands
•
It
performs a Boolean OR operation, evaluating the left-hand side only
if the right-hand side is false
•
It
performs a Boolean OR operation, evaluating the right-hand side only
if the left-hand side is false
•
It
performs a Boolean OR operation, evaluating the right-hand side only
if the left-hand side is true
•
None
of the above
2. Which of the following is true about VB generics?
Answers:
•
VB
allows non-type template parameters
•
VB
supports explicit specialization
•
VB
allows the type parameter to be used as the base class for the
generic type
•
VB
allows a generic type parameter to itself be a generic
•
VB
enforces that all code is valid for all type parameters
3. Which of the following are true about namespaces and assemblies?
Answers:
•
Namespaces
may be used to control access to contained classes
•
Assemblies
may be used to control access to contained classes
•
Namespaces
may be aliased to provide a shorthand notation for a fully qualified
identifier
•
The
same namespace may be used in multiple assemblies
•
A
single assembly may contain multiple namespaces
4. Which of the following are characteristics of the System.Threading.Timer class?
Answers:
•
The
method provided by the TimerCallback delegate will always be invoked
on the thread which created the timer.
•
The
thread which creates the timer must have a message processing loop
(i.e. be considered a UI thread)
•
The
class contains protection to prevent reentrancy to the method
provided by the TimerCallback delegate
•
You
can receive notification of an instance being Disposed by calling an
overload of the Dispose method.
5. Which of the following are true about declarative attributes?
Answers:
•
They
must be inherited from the System.Attribute.
•
Attributes
are instantiated at the same time as instances of the class to which
they are applied.
•
Attribute
classes may be restricted only to be applied to application element
types.
•
By
default, a given attribute may be applied multiple times to the same
application element.
6. Which of the following are true about BackgroundWorker?
Answers:
•
It
is a member of the System.Threading namespace.
•
It
abstracts away the details of cross-thread marshalling of data.
•
The
BackgroundWorker thread aborts immediately when the CancelAsync
method is called.
•
It
provides mechanisms for reporting progress, reporting completion and
cancelling.
7. Which of the following is not a standard service behavior supported by the System.ServiceProcess.ServiceController class members?
Answers:
•
Start
•
Continue
•
Pause
•
Restart
8. Which of the following are valid mechanisms for adding an event handler for Public Event SomeEvent() on the class Sample?
Answers:
•
AddHandler
Sample.SomeEvent AddressOf MyEventHandler Public Sub MyEventHandler
•
AddHandler
Sample.SomeEvent, AddressOf Sample.SomeEvent<br>
•
Private
WithEvents sample As New Sample Public Sub MyEventHandler(sender As
Object, e As EventArgs) Handles sample.SomeEvent
•
Private
WithEvents sample As New Sample Public Sub MyEventHandler() Handles
sample.SomeEvent
9. Which of the following code samples will cause a compilation error?
Answers:
•
Public
Class Sample End Class Public Class Sample(Of T) End Class
•
Public
Class Sample(Of T) End Class Public Class Sample(Of T, U) End Class
•
Public
Class Sample(Of T As Class) End Class Public Class Sample(Of T As
Structure) End Class
•
Public
Class Sample End Class Public Class Sample(Of T As Class) End Class
10. Which of the following are true about using ADO.NET DataSets and DataTables?
Answers:
•
The
connection to the database must remain valid for the life of the data
objects
•
All
tables in a dataset must come from the same database.
•
A
given instance of a DataTable can be in only one DataSet
•
Changes
made to multiple tables within a DataSet can easily be extracted to a
new DataSet which contains only the changes
•
Content
from multiple DataSets can easily be combined into a single DataSet
that contains the net result of all changes.
11. Which of the following types are derived from System.Reflection.MemberInfo?
Answers:
•
System.Reflection.PropertyInfo
•
System.Reflection.EventInfo
•
System.Type
•
System.Reflection.InstanceInfo
12. Elements in a System.Collections.Specialized.OrderedDictionary are:
Answers:
•
sorted
by Key
•
sorted
by Element
•
not
sorted
13. Which of the following are true with respect to the standard implementation of Garbage Collection?
Answers:
•
Objects
must be set to null in order to be eligible for garbage collection
•
Unless
specific steps are taken, an object may be moved in memory
•
Objects
become eligible for garbage collection as soon as it is impossible
for any code to access it
•
Objects
which implement finalizers will always have the finalizer called at
some point
14. Which System.Remoting class is used to transfer information across an AppDomain boundary?
Answers:
•
ObjRef
•
MarshalByRefObject
•
ObjectHandle
•
RemotingServices
15. Which of the following is a primary characteristic of System.Xml.XmlDataDocument?
Answers:
•
It
provides synchronized operations viewing the content either as an
XmlDocument or as a DataSet
•
It
provides the basic abilities for XMLDocument instances to be created
from or exported to DataSets
•
It
provides a limited set of capabilities compared to the
System.Xml.XmlDocument class
•
It
provides the basic abilities to allow DataSets to be loaded from or
exported to XML files.
16. Which of the following are required to be true by objects which are going to be used as keys in a System.Collections.HashTable?
Answers:
•
They
must handle case-sensitivity identically in both the GetHashCode()
and Equals() methods.
•
Key
objects must be immutable for the duration they are used within a
HashTable.
•
Get
HashCode() must be overridden to provide the same result, given the
same parameters, regardless of reference equalityl unless the
HashTable constructor is provided with an IEqualityComparer
parameter.
•
Each
Element in a HashTable is stored as a Key/Value pair of the type
System.Collections.DictionaryElement
•
All
of the above
17. Which of the following are true of parameters?
Answers:
•
Changes
to value parameters always involve making a copy of the original
argument
•
Items
passed as reference parameters must be initialized prior to the call
•
Output
parameters do not need to be assigned inside the method
•
Variable
length argument lists are not supported
18. Which of the following are not valid namespaces in the .NET framework?
Answers:
•
System.Data.OleDb
•
System.Data.SqlServer
•
System.Data.Oracle
•
System.Data.Xml
•
System.Data.SqlClient
19. Which of the following are valid as the underlying type for an enumeration?
Answers:
•
integer
•
sbyte
•
char
•
long
20. Which of the following will be executed without error? Public Class Fruit End Class Public Class Apple Inherits Fruit End Class
Answers:
•
Dim
list As New List(Of Fruit) list.Add(New Apple) list.Add(New Fruit)
Dim apple As Apple = list(0)
•
Dim
list As New List(Of Fruit) list.Add(New Apple) list.Add(New Fruit)
Dim fruit As Fruit = list(0)
•
Dim
list As New List(Of Apple) list.Add(New Apple) list.Add(New Fruit)
Dim apple As Apple = list(0)
•
Dim
list As New List(Of Apple) list.Add(New Apple) list.Add(New Fruit)
Dim fruit As Fruit = list(0)
21. What is the result of Console.WriteLine("{0}:{1}:{2}", CInt(2.5), CInt(1.5), Fix(1.5))?
Answers:
•
2:2:2
•
3:2:2
•
3:2:1
•
2:2:2
•
2:2:1
22. Custom non-fatal exceptions should be derived from:
Answers:
•
ApplicationException
•
DataMisalignedException
•
ExecutionEngineException
•
SystemException
23. The framework provides three different timer classes. Select the answer that properly matches the class with the listed characteristic.
Answers:
•
System.Threading.Timer
A simple timer which requires a delegate to be supplied for execution
when the timer expires. Execution of the method provided by the
delegate will be invoked on a ThreadPool Thread.
•
System.Timers.Timer:
Designed for use with worker threads in a multithreaded environment.
Can move among threads to handle the raised Elapsed event May result
in more accuracy than the System.Windows.Forms.Timer instances.
•
System.Windows.Forms.Timer
A lower resolution timer which requires a UI message pump on the
creating thread.
•
All
of the above
24. Which access limitation does a class member declared Protected Friend have?
Answers:
•
Access
is limited to the containing class plus any classes derived from the
containing class
•
Access
is limited to the current assembly
•
Access
is limited to the containing class plus any classes derived from the
containing class that are also in the current assembly
•
Access
is limited to the containing class plus any classes derived from the
containing class or any other class in the current assembly
25. Of which elements does Generics allow parameterization by type?
Answers:
•
Classes
•
Structs
•
Methods
•
Events
•
Fields
26. Which of the following are true when comparing built in types for equality?
Answers:
•
Integral
types are considered equal if they represent the same value.
•
Object
types are considered equal if they both refer to the same object or
if both are null
•
String
types are considered equal if they have identical lengths and
identical characters in each character position
•
String
types are considered equal if they have identical dimensions and
identical content at each array index
27. When using the Demand method of System.Security.IPermission, which of the following will occur?
Answers:
•
The
permissions of the code which invoked the Demand method will be
evaluated.
•
For
permissions which do a stack walk, an exception will occur only if
NONE of the calling codes has the required permission
•
For
permissions which do a stack walk, an exception will occur if ANY of
the calling codes does not have the required permission
•
The
permission levels of individual stack frames are always checked
regardless of the permission type.
28. Which of the following mechanisms are not suitable for returning a single row from a DataTable containing a large number of records?
Answers:
•
DataTable.Rows.Find
•
DataTable.Rows.Select
•
DataTable.Select
•
Enumerating
across DataTable.Rows
29. Which of the following characteristics is found in The DateTime type?
Answers:
•
It
always references the UTC (GMT) time
•
It
always references the Local time
•
It
contains a member indicating which time zone it refers to
•
It
contains a member indicating whether it is UTC, Local, or Unspecified
30. What does the AndAlso operator do?
Answers:
•
It
performs a Boolean AND operation, evaluating both operands
•
It
performs a Boolean AND operation, evaluating the left-hand side only
if the right-hand side is false
•
It
performs a Boolean AND operation, evaluating the right-hand side only
if the left-hand side is false
•
It
performs a Boolean AND operation, evaluating the right-hand side only
if the left-hand side is true
•
None
of the above
31. Which of the following does NOT apply to XCOPY deployment?
Answers:
•
The
appropriate version of the .NET framework must be installed.
•
All
application components must be in the application directory, or a
subdirectory.
•
Shared
components can be installed as part of the XCOPY.
•
XCOPY
deployment to a non-empty target directory may have unintended
side-effects
32. Which of the following operators can be overloaded?
Answers:
•
Assignment
(=)
•
Conditional
(AndAlso,OrElse)
•
Logical
(And, Or, Xor)
•
Shift
(<<, >>)
33. With which class is the task of mapping a specific point in time into units, such as weeks, months, and years accomplished?
Answers:
•
System.DateTime
•
System.TimeSpan
•
System.Globalization.Calender
•
System.Globalization.CultureInfo
34. Which of the following are true about statements?
Answers:
•
A
while statement will always execute its body at least once.
•
A
for loop will always execute its body at least once.
•
A
try statement must always include at least one catch block
•
A
case clause within a switch statement may not fall through to the
next case clause
35. What will be the output generated by the following code? Dim t As String = "This Is a Test" t.Replace("T", "?") Console.WriteLine(t)
Answers:
•
?his
Is a ?est
•
?his
Is a ?es?
•
This
Is a Test
•
?his
Is a Test
36. Which of the following encodings are NOT supported by classes in the System.Text namespace?
Answers:
•
ASCII
•
Unicode
•
UTF-7
•
UTF-8
•
EBCDIC
37. Which of the following is not a valid attribute for impacting serialization?
Answers:
•
DataContract
•
DataMember
•
EnumMember
•
CollectionDataContract
•
DataObject
38. Determining the availability of sufficient memory for an operation can be accomplished by:
Answers:
•
There
is no supported application level means to determine if a specific
amount of memory is available.
•
using
static methods of System.Runtime.MemoryFailPoint and checking the
return value
•
creating
an instance of System.Runtime.MemoryFailPoint and monitoring for an
InsufficientMemoryException
•
creating
an instance of System.Runtime.MemoryFailPoint and monitoring for an
OutOfMemoryException
39. Which of the following characteristics is found in overloaded methods?
Answers:
•
They
must have the same name
•
They
must have the same parameter signature
•
They
must have the same return type
•
They
must have the same access level
•
None
of the above
40. Which of the following conditions are true regarding System.Diagnostics.Trace
Answers:
•
Trace
is enabled for both Release and Debug initial configurations
•
Trace
can be controlled both by preprocessor directives, and compiler
directives
•
To
change the severity levels which generate output, you must recompile
your program
•
You
can create enhanced capabilities by inheriting from the
System.Diagnostics.Trace class
41. Which of the following are true about event handling?
Answers:
•
One
method may handle events from different sources
•
A
single event can be handled by multiple methods
•
Event
handlers must be members of the same class as raised the event
•
Event
handlers can be dynamically added and removed at runtime
•
It
is impossible to determine the order in which event handlers will be
invoked
42. Which of the following are true about Nullable types?
Answers:
•
A
Nullable type is a reference type.
•
A
Nullable type is a structure.
•
An
implicit conversion exists from any non-nullable value type to a
nullable form of that type.
•
An
implicit conversion exists from any nullable value type to a
non-nullable form of that type.
•
A
predefined conversion from the nullable type S? to the nullable type
T? exists if there is a predefined conversion from the non-nullable
type S to the non nullable type T
43. Which of the following are true of ADO.NET?
Answers:
•
It
uses a connected provider model
•
It
uses a disconnected provider model
•
It
includes a DataAdapter class, which provides a high-performance
mechanism for retrieving data
•
System.Data.Common
provides classes that are database agnostic
44. When Deleting a DataRow from the DataRowCollection of a DataTable, you can:
Answers:
•
use
the DataRowCollection.Remove method to immediately delete the row.
•
use
the DataRowCollection.Remove method to mark the row for deletion when
DataRow.AcceptChanges is called.
•
use
the DataRow.Delete method to immediately delete the row.
•
use
the DataRow.Delete method to mark the row for deletion when
DataRowAcceptChanges is called.
45. Which of the following can Interfaces contain?
Answers:
•
Methods
•
Properties
•
Fields
•
Conversion
operators
•
Events
46. Which of the following are valid assignments?
Answers:
•
Dim
i As Int32 = Int16.MaxValue
•
Dim
s As Single = Double.MaxValue
•
Dim
s2 As String = Int64.MaxValue
•
Dim
i2 As Int32 = Int64.MaxValue
47. What output will be generated by the following code? Dim sb As New StringBuilder(10) sb.AppendFormat("1234567890123") Console.WriteLine(sb.Capacity)
Answers:
•
10
•
13
•
Some
value equal to or larger than 13
•
Int32.MaxValue
48. Which of the following characteristics do classes in the System.Drawing namespace such as Brush,Font,Pen, and Icon share?
Answers:
•
They
encapsulate native resources and must be properly Disposed to prevent
potential exhausting of resources.
•
They
are all MarshalByRef derived classes, but functionality across
AppDomains has specific limitations.
•
You
can inherit from these classes to provide enhanced or customized
functionality
•
They
are Value Type objects.
49. Which of the following is NOT a requirement for an application to be certified in the "Certified for Windows Program"
Answers:
•
Usage
of system settings for size, color, and font
•
Support
for Windows "High Contrast" option
•
Usage
of sound to notify of critical information
•
Keyboard
only access to all features including menus, and controls
50. Which of the following is not a valid value for DataRowState?
Answers:
•
Added
•
Deleted
•
Dirty
•
Detached
51. Which of the following is NOT part of an assembly?
Answers:
•
Manifest
•
MetaData
•
Intermediate
Language Code
•
Resources
•
Native
Executable Code
52. Given the following code, which calls will be valid ways to add the elements of a string array to a List(Of String)? Dim values() As String = {"1", "2", "3", "4"} Dim valueList As New List(Of String)
Answers:
•
valueList.Insert(values)
•
valueList
= values
•
valueList.Add(values)
•
valueList.AddRange(values)
53. Which method calls will compile the following? Private Sub Sample(ByVal number As Integer, Optional ByVal bool As Boolean = True) End Sub
Answers:
•
Sample(1,
True)
•
Sample(1)
•
Sample(bool:=False)
•
Sample(bool:=False,
number:=1)
•
Sample(bool:=False,
1)
54. Which of the following operations can NOT be performed inside a catch block?
Answers:
•
Prevention
of the caught exception from leaving the catch block
•
Allowing
the original exception to propagate after it has been caught, with
all of the information (including context) intact
•
Wrapping
the caught exception inside a newly created exception of a different
type
•
Generating
a new exception with no information about the original exception
•
Altering
the Message , TargetSite and/or StackTrace, of the existing exception
before re-throwing
55. Which of the following are true of the System.Text.StringBuilder class?
Answers:
•
It
is less efficient than string concatenation when many concatenations
are performed.
•
There
is a method which formats the string being appended to the
StringBuilder, much like the String.Format.
•
The
StringBuilder is most efficient when initialized using the
parameterless constructor.
•
All
of the above
•
None
of the above
56. An executable code that will be dynamically created within a running application__________.
Answers:
•
is
not possible with VB
•
should
be done using the Microsoft.VisualBasic.Compiler class
•
should
be done using the Microsoft.VisualBasic.VBCodeProvider class
•
should
be done by explicitly creating a process and running vbc.exe
•
requires
that Visual Studio is installed and automated to create the new code
57. In which of the following ways do structures differ from classes?
Answers:
•
Structures
cannot implement interfaces
•
Structures
cannot inherit from a base structure
•
Structures
cannot have events
•
Structures
cannot have overrideable methods
58. Transactions initiated in which of the following are supported by System.Transactions infrastructure?
Answers:
•
SQL
Server
•
ADO.NET
•
MSMQ
•
Microsoft
Distributed Transaction Coordinator (MSDTC).
•
All
of the above
59. To which of the following can System.IO.IsolatedStorage not be scoped?
Answers:
•
Restricted
to a Specific Application
•
Restricted
to a Specific AppDomain
•
Restricted
to a Specific User
•
Restricted
to a specific Physical Media
60. The term Encapsulation is most commonly used to mean:
Answers:
•
separating
an item's public interface from the actual implementation
•
embedding
content as a resource into an executable program
•
providing
a short summary description of complex operations
•
a
technique using base and derived classes
61. Public Class Sample Public Sub New(ByVal x As Integer) End Sub End Class In the above code, which of the following other class constructors can directly access the provided constructor?
Answers:
•
Public
Sub New() Me.New(1) End Sub
•
Public
Sub New() New(1) End Sub
•
Both
the the above.
•
One
class constructor cannot directly access another constructor
62. Which of the following can one perform to create a System.Type instance for a given specialization of a generic?
Answers:
•
Call
the Type.MakeGenericType(...)method on an instance of System.Type
which represents the Generic, specifying the types of the generic
parameters.
•
Call
the static Type.MakeGenericType(...) method specifying both the base
type and the types of the generic parameters.
•
Call
the GetType() method on an instance of the specialization
•
Call
Reflection.Emit(...)
•
Call
the Type.GetGenericTypeDefinition() method
63. Which of the following types guarantee atomic reads and writes?
Answers:
•
int
•
double
•
string
•
long
•
float
64. Which of the following is true about exceptions?
Answers:
•
Exceptions
should be derived from the System.Exception, but are not required to
do so.
•
If
no catch block is found for an exception, and the source is not a
static constructor, a System.ThreadException will be thrown
•
Mathematical
errors such as divide by zero, or numeric overflow will generate an
exception that is derived from System.Exception
•
Every
throw statement must have at least one catch block
65. What is the value of b3 after the following code is executed? Dim b1 As Boolean? = True Dim b2 As Boolean? = Nothing Dim b3 As Boolean? = IIf(b1 AndAlso b2, b1, b2)
Answers:
•
System.DbNull.Value
•
TRUE
•
FALSE
•
Nothing
•
None
of the above (An InvalidCastException is thrown)
66. Which of the following are true about using the System.Messaging.MessageQueue class?
Answers:
•
It
provides communication across heterogeneous networks
•
It
provides communication when one of the endpoints may be off-line
•
It
may behave differently depending on the current operating system
•
A
new system level queue may be created simply by creating an instance
of MessageQueue.
67. Which of the following are valid means of reading all data from a file into a string?
Answers:
•
Dim
sr As New System.IO.StreamReader("C:\temp\myfile.txt") Dim
s As String = sr.ReadLine
•
Dim
sr As New System.IO.StreamReader("C:\temp\myfile.txt") Dim
s As String = sr.Read
•
Dim
sr As New System.IO.StreamReader("C:\temp\myfile.txt") Dim
s As String = sr.ReadAll
•
Dim
s As String =
My.Computer.FileSystem.ReadAllText("C:\temp\myfile.txt")
68. Which of the following is not an unboxing conversion?
Answers:
•
Public
Sub Sample1(ByVal o As Object) Dim i As Integer = CInt(o) End Sub
•
Public
Sub Sample1(ByVal vT As ValueType) Dim i As InTeger = CInT(vT) End
Sub
•
Enum
E Hello World End Enum Public Sub Sample1(ByVal et As System.Enum)
Dim e As E = CType(et, E) End Sub
•
Public
Interface I Property Value() As Integer End Interface Public Sub
Sample1(ByVal vt As I) Dim i As Integer = vt.Value End Sub
•
Public
Class C Private _value As Integer Public Property Value() As Integer
Get Return _value End Get Set(ByVal value As Integer) _value = value
End Set
69. Parameterized Properties in VB are__________.
Answers:
•
not
supported except for implementing and indexer.
•
properties
which take one or more parameters (e.g. to retrieve one element from
a member collection)
•
properies
which use one or more attributes to control their behavior
•
properties
which can be passed as Method Parameters so they can be invoked by
the called method.
70. Which of the following can an interface NOT contain?
Answers:
•
Methods
•
Events
•
Fields
• Indexers
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