66 Answered Test Questions:
1. Which of the following are static methods of the System.Reflection Activator class?
Answers:
•
GetInstance
•
All
of the above
2. Which of the following are true about Extension methods?
Answers:
•
They
can be declared either static or instance members
•
They
must be declared in the same assembly (but may be in different source
files)
•
Extension
methods can be used to override existing instance methods
• Extension
methods with the same signature for the same class may be declared in
multiple namespaces without causing compilation errors
3. When using a DataReader to access the results of a Database operation, which of the following are true?
Answers:
•
The
DataReader provides a cursor that can be used to move forward and
backwards through the result.
•
The
DataReader provides random access capabilities on the result.
• The
Application code can reference the first row of a multi-row result
set faster than it can be by loading it directly into a DataTable
4. Which of the following scenarios are applicable to Window Workflow Foundation?
Answers:
•
User-interface
page flows
•
Builtin
support for communications across multiple applications and/or
platforms
5. 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.
• Changes
made to multiple tables within a DataSet can easily be transferred 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.
6. 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 them
7. Which of the following types guarantee atomic reads and writes?
Answers:
•
double
•
string
•
long
8. Which of the following does using Initializer Syntax with a collection as shown below require? CollectionClass numbers = new CollectionClass { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
Answers:
•
The
Collection Class must implement System.Collections.Generic.IList<T>
•
The
items in the initializer will be treated as an IEnumerable<T>
and passed to the collection constructor+K110
9. Which features that are not supported in the System.TimeZone class does the System.TimeZoneInfo class provide?
Answers:
•
It
provides readable names for both regular time and, if appropriate,
daylight savings time
•
It
provides the period the time zone was in effect for. For example:
From 1986 to 2006, it was observed from the first Sunday in April to
the last Sunday in October, but since 2007, it is being observed from
the second Sunday in March to the first Sunday in November
10. Within Windows Workflow Foundation, Compensating Actions are used for:
Answers:
•
provide
a means to rollback a failed transaction
•
provide
a means to terminate an in process transaction
•
achieve
load balancing by adapting to the current activity
11. Of which elements does Generics allow parameterization by type?
Answers:
•
Classes
•
Methods
•
Events
•
Fields
12. Which of the following do the advantages of Lambda Expressions over Anonymous methods include?
Answers:
•
More
concise syntax
•
The
types for a Lambda Expression may be omitted
•
The
body of an anonymous method can not be an expression
•
Lambda
Expressions permit deferred type interference, that anonymous methods
do not
13. In which of the following types of applications can Windows Workflow Foundation be used?
Answers:
•
Console
Applications
•
Windows
Forms based Applications
•
Windows
Presentation Foundation based Applications
•
ASP.NET
based applications
14. Which of the following items are recommended when using XML comments to generate documentation?
Answers:
•
<exception>
•
<code>
•
<events>
15. 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.CultureInfo
16. Which of the following are true regarding the System.Collections.Generic.HashSet<T> class?
Answers:
•
HashSet
is an unordered collection.
• HashSet
requires that each element be unique as determined by either a
supplied EqualityComparer or the default EqualityComparer
•
Operations
on sets (Union, Intersection, etc) always create new result sets
•
HashSet
provides functionality for "conceptual sets" where the
rules for membership can be specified without actually creating all
of the items.
17. Which of the following are true regarding System.Threading.ReaderWriterLockSlim?
Answers:
•
It
is optimized for single processor/core operations
•
It
is optimized for usage where writes from multiple sources are common
•
By
default, a thread which has a read lock on a resource and attempts to
get another read lock on the same resource will throw an exception
18. The framework provides three different timer classes. Select the answer that properly matches the class with the listed characteristic.
Answers:
•
System.Threading.Timer
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 System.Windows.Forms.Timer instances.
•
System.Windows.Forms.Timer
Lower Resolution timer which requires a UI message pump on the
creating thread.
•
All
of the above
19. Which of the following advantages does System.Collections.IDictionaryEnumerator provide over System.Collections.IEnumerator?
Answers:
•
It
is optimized to handle the structure of a Dictionary.
•
It
provides properties to determine if the Dictionary is enumerated in
Key or Value order
•
It
provides reverse lookup methods to distinguish a Key from a specific
Value
20. While using the capabilities supplied by the System.Messaging classes, which of the following are true?
Answers:
•
Information
must be explicitly converted to/from a byte stream before it uses the
MessageQueue class
•
Invoking
the MessageQueue.Send member defaults to using the
System.Messaging.XmlMessageFormatter to serialize the object.
•
Objects
must be XMLSerializable in order to be transferred over a
MessageQueue instance.
• The
first entry in a MessageQueue must be removed from the queue before
the next entry can be accessed
•
Entries
removed from a MessageQueue within the scope of a transaction, will
be pushed back into the front of the queue if the transaction fails.
21. What impact will using implicitly typed local variables as in the following example have? var sample = "Hello World";
Answers:
•
The
actual type is determined at runtime, and late binding takes effect
•
The
actual type is based on the native VARIANT concept, and no binding to
a specific type takes place.
•
"var"
itself is a specific type defined by the framework, and no special
binding takes place
22. Which of the following are true about System.GC under version 3.5 of the Framework?
Answers:
• You
can request that the garbage collector process a generation if it
determines that it is appropriate at specific points in your code
•
You
can control the intrusiveness of the garbage collector (i.e. how
often it performs collections) while your program is running
•
You
can control the intrusiveness of the garbage collector (i.e. how
often it performs collections) only during application initialization
•
You
should specify LowLatency when using Concurrent Server Garbage
Collection to improve memory utilization
23. Which of the following operators can be overloaded?
Answers:
•
Assignment
(=)
•
Conditional
(&&,||)
•
Shift
(<<, >>)
24. Which of the following does the System.IO.Pipes namespace provide?
Answers:
•
Interprocess
communication through anonymous and/or named pipes.
•
Access
to named pipes using System.IO.Stream
•
Access
to system level pipe security implemented as discretionary access
control lists (DACL) and/or system access control lists (SACL),
•
Asynchronous
read and write operations
25. Which of the following statements do Expression Trees fit best?
Answers:
•
Expression
trees are a data structure which can be initially composed using
language syntax.
•
Expression
trees are dynamically generated code which is executed to perform the
desired function.
•
Expression
trees can only be created from Lambda Expressions
•
Expression
trees can be modified once they are created
26. By which contract are the ws-addressing action and replyaction elements of the soap envelop controllable when Windows Communication Foundation is used?
Answers:
•
ServiceContract
•
OperationContract
•
DataContract
27. Which of the following are true when comparing ADO.NET with Microsoft DNA (Distributed interNet Applications)?
Answers:
•
ADO.NET
is better suited for communications between disparate
systems/applications.
•
ADO.NET
can eliminate the need for COM components in the communication layer.
•
DNA
makes it easier to communicate across firewalled boundaries.
28. 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.
29. 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
30. Which of the following are goals of Windows Communication Foundation?
Answers:
•
Bringing
various existing communication technologies into a unified
environment.
•
Cross
vendor/platform communication.
•
Support
for asynchronous communications.
•
Support
for distributed applications based on technologies such as MSMQ
and/or COM+
31. Which access limitation is found in a class member declared protected internal?
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
32. When Windows Communication Foundation is used to develop a Web Service, which of the following are supported?
Answers:
•
WS-Addressing
•
WS-MetadataExchange
•
WS-Security
•
WS-Atomic
Transaction
33. To which contract is the SessionMode property to disallow, require, or permit applied when Windows Communication Foundation is used?
Answers:
•
OperationContract
•
DataContract
•
MessageContract
34. Which of the following is not supported by remoting object types?
Answers:
•
well-known
singleton
•
well-known
single call
•
context-agile
35. The default number of threads per processor in the System.Threading.ThreadPool class under version 3.5 of the Framework is:
Answers:
•
1
•
25
•
100
•
500
36. 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
37. When using an automatic property, which of the following statements is true?
Answers:
•
The
compiler generates a backing field that is completely inaccessible
from the application code.
• The
compiler generates a backing field that is a private instance member
with a leading underscore that can be programmatically referenced.
•
The
compiler generates a backing field that is accessible via reflection
•
The
compiler generates a code that will store the information separately
from the instance to ensure its security.
38. When using an implicitly typed array, which of the following is most appropriate?
Answers:
•
All
elements in the initializer list must be of the same type.
• All
elements in the initializer list must be implicitly convertible to a
known type which is the actual type of at least one member in the
initializer list
•
All
elements in the initializer list must be implicitly convertible to
the common type which is the base type of the items actually in the
list
•
There
are no restrictions on the items in the initializer list as the array
is not declared to be a specific type.
39. Which of the following characteristics is present 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
40. Which of the following code samples show a valid static constructor?
Answers:
•
class
Sample { public static Sample() { } }
•
class
Sample { static Sample(int value) { } }
•
class
Sample { static void Sample() { } }
41. Which of the following are true regarding System.Web.Mail and System.Net.Mail namespaces?
Answers:
•
System.Web.Mail
is not supported under version 3.5 of the Framework
•
System.Web.Mail
is deprecated under version 3.5 of the Framework, and it is
officially recommended that System.Net.Mail be used.
•
System.Web.Mail
is the preferred solution when using IIS hosted applications
•
There
are no functional differences; the items were moved to a new
namespace to reflect their applicability in a better way
42. In which of the following ways do structs differ from classes?
Answers:
•
Structs
can not implement interfaces
•
Structs
cannot inherit from a base struct
•
Structs
cannot have events interfaces
43. To which of the following do automatic properties refer?
Answers:
• You
declare (explicitly or implicitly) the accessibility of the property
and get and set accessors but do not provide any implementation or
backing field
•
You
attribute a member field so that the compiler will generate get and
set accessors
•
The
compiler creates properties for your class based on class level
attributes
•
They
are properties which are automatically invoked as part of the object
construction process
44. Given the code below, which of the following items will cause a compilation error? static void F1(params int [] y) { } static void Sample() { int [] j = new Int32[3]; List k = new List(); // ANSWER GOES HERE }
Answers:
•
F1(j);
•
F1(1,
2, 3);
•
F1(new
[] {1,2,3})
•
None
of the above
45. Which of the following are true about Nullable types?
Answers:
•
A
Nullable type is a reference type.
•
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
46. For which of the following scenarios does Reflection.Emit provide support?
Answers:
•
Defining
methods dynamically.
•
Defining
types dynamically
•
Defining
Instances dynamically
•
Exporting
an executable code to a disk based assembly
47. Which of the following are true about System.Security.Cryptography under version 3.5 of the framework
Answers:
•
Support
is provided for the "Suite B" set of cryptographic
algorithms as specified by the National Security Agency (NSA) .
•
Cryptography
Next Generation (CNG) classes are supported on XP and Vista systems
•
The
System.Security.Cryptography.AesManaged class allows custom block
size, iteration counts and feedback modes to support any the Rijndael
based encryption.
48. Custom non-fatal exceptions should be derived from:
Answers:
•
DataMisalignedException
•
ExecutionEngineException
•
SystemException
49. class Sample { public Sample(int x) { } } In the above code, which of the following other class constructors can directly access the provided constructor?
Answers:
•
public
Sample() : Sample(1) {}
•
Both
of the above
•
One
class constructor can not directly access another constructor
50. 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.
51. Which of the following is not an unboxing conversion?
Answers:
•
void
Sample1(object o) { int i = (int)o; }
•
void
Sample1(ValueType vt) { int i = (int)vt; }
•
enum
E { Hello, World} void Sample1(System.Enum et) { E e = (E) et; }
•
interface
I { int Value { get; set; } } void Sample1(I vt) { int i = vt.Value;
}
52. Which of the following regarding the System.DateTimeOffset structure are true?
Answers:
•
It
combines a DateTime structure with a TimeZone structure
•
It
provides arithmetical operations using values with different offsets
from the UTC
•
It
can be used to determine the specific TimeZone for a local time
53. 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
54. When using version 3.5 of the framework in applications which emit a dynamic code, which of the following are true?
Answers:
•
The
generated code has no more permissions than the assembly which
emitted it.
•
It
can be executed by calling System.Reflection.Emit.DynamicMethod(
string name, Type returnType, Type[] parameterTypes ) without any
special permissions
•
None
of the above
55. Which of the following characteristics are found in a query expression?
Answers:
•
It
must begin with a select clause
•
It
can end with a group clause
•
An
orderby clause may optionally follow a select clause
56. 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.
57. Which of the following characteristics do classes in the System.Drawing namespace such as Brush,Font,Pen, and Icon share?
Answers:
• They
encapsulate native resource 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.
58. Which of the following are true regarding event declaration in the code below? class Sample { event MyEventHandlerType MyEvent; }
Answers:
•
MyEventHandlerType
must be derived from System.EventHandler or
System.EventHandler<TEventArgs>
•
MyEventHandlerType
must take two parameters, the first of the type Object, and the
second of a class derived from System.EventArgs
•
MyEventHandlerType
may have a non-void return type
•
If
MyEventHandlerType is a generic type, event declaration must use a
specialization of that type.
•
MyEventHandlerType
cannot be declared static
59. Which of the following statements apply to developing .NET code, using .NET utilities that are available with the SDK or Visual Studio?
Answers:
•
Developers
can create assemblies directly from the MSIL Source Code.
•
Developers
can examine PE header information in an assembly.
•
Developers
can strip all meta-data from managed assemblies.
•
Developers
can split an assembly into multiple assemblies.
60. Which of the following is true about C# generics?
Answers:
•
C#
allows non-type template parameters
•
C#
supports explicit specialization
•
C#
allows the type parameter to be used as the base class for the
generic type
•
C#
allows a generic type parameter itself to be a generic
61. The output generated by the following code will be: string t = "This Is a Test"; t.Replace("T", "?"); Console.WriteLine(t);
Answers:
•
?his
Is a ?est
•
?his
Is a ?es?
•
?his
Is a Test
62. Which of the following are true about anonymous types?
Answers:
•
They
can be derived from any reference type.
• Two
anonymous types with the same named parameters in the same order
declared in different classes have the same type.
•
Anonymous
types can have methods
•
All
properties of an anonymous type are read/write
63. Which of the following are true regarding multiple versions of an assembly?
Answers:
• When
multiple versions of an assembly are available on the search path
(AKA private assemblies), the runtime will use the first matching
assembly with a version number equal to or higher than the assembly
version that was originally linked against.
•
When
assemblies are resolving in the GAC (AKA shared assemblies), both the
originator and the version are considered in determining the
appropriate assembly.
•
Configuration
files can be used to override the version specified at build time.
•
Strong
Names are not required to utilize .NET's versioning capabilities
64. Which of the following are true about declarative attributes?
Answers:
•
Attributes
are instantiated at the same time as instances of the class to which
they are applied.
•
Attribute
classes may be restricted to be applied only to application element
types.
•
By
default, a given attribute may be applied multiple times to the same
application element.
65. Which of the following statements are applicable to LINQ to SQL?
Answers:
•
It
is a set of enhancements to the DataSet and DataTable classes.
•
It
requires the use of the SQLServer as the database
•
Because
LINQ is based on Queries, it can not be used to modify the data in
the database.
•
None
of the above
66. When Implementing System.EnterpriseServices.ServicedComponent derived classes, which of the following statements are true?
Answers:
•
Enabling
object pooling requires an attribute on the class and the enabling of
pooling in the COM+ catalog.
• Methods
can be configured to automatically mark a transaction as complete by
the use of attributes.
•
You
can configure authentication using the AuthenticationOption when the
ActivationMode is set to Library.
• You
can control the lifecycle policy of an individual instance using the
SetLifetimeService method.
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