Create and Use Types

Question 1

Which two classes could you use to retrieve

information on all folders on a local system?

Answer 1

the Directory and DirectoryInfo classes

Question 2

Which two interfaces should be implemented to use

the foreach construct with a class?

Answer 2

the IEnumerator and IEnumerable interfaces

Question 3

What is the syntax used to declare a method that has

a generic type parameter?

Answer 3

public void GenericMethod ( T

param )

Question 4

Which element indicates the CLR versions supported

by an application?

Answer 4

the supportedRuntime element

Question 5

Which method of the Queue class should you invoke
to retrieve and remove the first item?

Answer 5

the Dequeue method

Question 6

Which interface should you implement for a class to
release managed or unmanaged resources?

Answer 6

the IDisposable interface

Question 7

Which method of the LinkedList class should be
invoked to add an object to the beginning?

Answer 7

the AddFirst method

Question 8

Which method should be implemented when creating
a class that implements the IEnumerable interface?

Answer 8

the GetEnumerator method

Question 9

Which method should you invoke to release the

resources held by an object?

Answer 9

the Dispose method

Question 10

Which interface should you implement to enable

sorting in a class?

Answer 10

the IComparable interface

Question 11

Which method of the Queue class should you invoke
to add an item to the end?

Answer 11

the Enqueue method

Question 12

Which class should you use to invoke a method of
dynamically loaded type at runtime?

Answer 12

the MethodInfo class

Question 13

Which method of the FileStream class should you
invoke to write an array of bytes to a file?

Answer 13

the Write method

Question 14

Which class represents a collection of performance
counter settings?

Answer 14

the CounterCreationDataCollection class

Question 15

Which property of the IEnumerator class will return
the object available in the current iteration?

Answer 15

the Current property

Question 16

Which method of the Stack class should you invoke to
add an item to the beginning?

Answer 16

the Push method

Question 17

Which method of the LinkedList class should be
invoked to add an object to the beginning?

Answer 17

the AddFirst method

Question 18

Which statement automatically disposes of and dereferences a specified object after the code block
concludes?

Answer 18

the using statement

Question 19

Which class should you use to retrieve methods of a
dynamically loaded type at runtime?

Answer 19

the MemberInfo class

Question 20

Which class should you use to dynamically
impersonate a user at runtime?

Answer 20

the WindowsImpersonationContext class

Question 21

Which permission class controls access to managed
types at runtime?

Answer 21

the ReflectionPermission class

Question 22

Which method of the StreamReader class returns a positive value indicating another character is available
but does not reposition the cursor?

Answer 22

the Peek method

Question 23

Which method of the StreamWriter class creates text
content and adds line terminator to the end?

Answer 23

the WriteLine method

Question 24

Which class should you use to compare strings from
different languages based on a particular culture?

Answer 24

the CompareInfo class

Question 25

Which two methods should be implemented when
creating a class that implements the IEnumerator
interface?

Answer 25

the MoveNext and Reset methods

Question 26

Which method is used to compare the current object to

another object?

Answer 26

the CompareTo method

Question 27

Which method of the Stack class should you invoke to
retrieve and remove the last item?

Answer 27

the Pop method

Question 28

Which method of the FileStream class should you
invoke to read data from a file into an array of bytes?

Answer 28

the Read method

Question 29

Which permission class controls access based upon
the Global Assembly Cache (GAC) instance from
which a method call originates?

Answer 29

the GacIdentityPermission class

Question 30

Which class should you use to read lines from a
standard text file?

Answer 30

the StreamReader class

Question 31

Which property of the DriveInfo class will indicate
whether a drive is a fixed, removable, or network
drive?

Answer 31

the DriveType property