Question 1

BinaryFormatters can be used to serialize and deserialize objects coming in and going out via a stream.

Accepted Answer

A) True 
 B)False  True

Question 2

For variables of reference types,you must check the class declaration to ensure that the type is serializable.

Accepted Answer

A) True 
 B)False  True

Question 3

________ are used for long-term retention of large amounts of data.

Accepted Answer

A)  Memory cards 
B)  Buffers 
C)  Files 
D)  Data structures 
A)  Memory cards 
B)  Buffers 
C)  Files 
D)  Data structures C

Question 4

To create a new file and return a stream that can be used to process the file,use the:

Accepted Answer

A)  CreateFile method of class File 
B)  NewFile method of class File 
C)  Create method of class File 
D)  New method of class File 
A)  CreateFile method of class File 
B)  NewFile method of class File 
C)  Create method of class File 
D)  New method of class File

Question 5

Data stored in a file is considered:

Accepted Answer

A)  temporary data 
B)  persistent data 
C)  recurring data 
D)  there is no need to store data in files 
A)  temporary data 
B)  persistent data 
C)  recurring data 
D)  there is no need to store data in files

Question 6

When a file is opened,a stream object is created and associated with the file.

Accepted Answer

A) True 
 B)False

Question 7

All simple-type variables and strings are serializable.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following attributes is needed to indicate to the CLR that objects of the class can be serialized

Accepted Answer

A) [Serializable] 
B) [DeSerializable] 
C) [Serialize] 
D) both a and b 
A) [Serializable] 
B) [DeSerializable] 
C) [Serialize] 
D) both a and b

Question 9

In a class that's marked with the [Serializable] attribute or that implements inter
face ISerializable,not every instance variable of the class needs to be seri
alizable.

Accepted Answer

A) True 
 B)False

Question 10

A recursive search on a directory is one where:

Accepted Answer

A)  a directory is searched and then all of its sub directories are searched. 
B)  each sub directory is searched and then the main directory is searched. 
C)  a search is done randomly on all directories. 
D)  a and c. 
E)  a and b 
A)  a directory is searched and then all of its sub directories are searched. 
B)  each sub directory is searched and then the main directory is searched. 
C)  a search is done randomly on all directories. 
D)  a and c. 
E)  a and b

Question 11

Deserialize returns a reference of type:

Accepted Answer

A)  object which must be cast to the appropriate type to manipulate the object 
B)  the type that the object was originally 
C)  Deserialized which must be cast to the appropriate type to manipulate the object 
D)  None of the above 
A)  object which must be cast to the appropriate type to manipulate the object 
B)  the type that the object was originally 
C)  Deserialized which must be cast to the appropriate type to manipulate the object 
D)  None of the above

Question 12

When a FileStream object is opened,the file-position pointer is _________.

Accepted Answer

A) set to Null 
B)  set to 0 
C)  needs to be explicitly created 
D)  set to the end of the file 
A) set to Null 
B)  set to 0 
C)  needs to be explicitly created 
D)  set to the end of the file

Question 13

The Console.Error property returns:

Accepted Answer

A)  a standard error stream object 
B)  a new error 
C)  an object of type error 
D)  None of the above 
A)  a standard error stream object 
B)  a new error 
C)  an object of type error 
D)  None of the above

Question 14

Use the _______ method of class OpenFileDialog to show a dialog that allows the user to select a file to be opened.

Accepted Answer

A)  OpenFile 
B)  ChooseFile 
C)  ShowDialog 
D)  OpenFileDialog 
A)  OpenFile 
B)  ChooseFile 
C)  ShowDialog 
D)  OpenFileDialog

Question 15

What kind of exception is thrown if there's a problem opening or creating a StreamWriter

Accepted Answer

A) Exception 
B)  StreamException 
C)  OpenAndCreatingException 
D)  IOException 
A) Exception 
B)  StreamException 
C)  OpenAndCreatingException 
D)  IOException

Question 16

The standard output stream object enables a program to output data to the
screen.

Accepted Answer

A) True 
 B)False

Question 17

The enumeration FileAccess is used to:

Accepted Answer

A)  control user access to a file 
B)  control program access to a file 
C)  control the amount of updating that can be done on a file at once 
D)  FileAccess is a method, not an enumeration 
A)  control user access to a file 
B)  control program access to a file 
C)  control the amount of updating that can be done on a file at once 
D)  FileAccess is a method, not an enumeration

Question 18

Files can be stored in:

Accepted Answer

A)  hard drives 
B)  optical disks 
C)  magnetic tapes 
D)  All of the above 
A)  hard drives 
B)  optical disks 
C)  magnetic tapes 
D)  All of the above

Question 19

Class Directory is used to change directories.

Accepted Answer

A) True 
 B)False

Question 20

A serialized object is an object that includes:

Accepted Answer

A) a sequence of bytes that contain the object's data 
B)  information about the object's type 
C)  information about the types of data stored in the object 
D)  All of the above 
A) a sequence of bytes that contain the object's data 
B)  information about the object's type 
C)  information about the types of data stored in the object 
D)  All of the above

Exam 17: Files and Streams

BinaryFormatters can be used to serialize and deserialize objects coming in and going out via a stream.

For variables of reference types,you must check the class declaration to ensure that the type is serializable.

________ are used for long-term retention of large amounts of data.

To create a new file and return a stream that can be used to process the file,use the:

Data stored in a file is considered:

When a file is opened,a stream object is created and associated with the file.

All simple-type variables and strings are serializable.

Which of the following attributes is needed to indicate to the CLR that objects of the class can be serialized

In a class that's marked with the [Serializable] attribute or that implements inter face ISerializable,not every instance variable of the class needs to be seri alizable.

A recursive search on a directory is one where:

Deserialize returns a reference of type:

When a FileStream object is opened,the file-position pointer is _________.

The Console.Error property returns:

Use the _______ method of class OpenFileDialog to show a dialog that allows the user to select a file to be opened.

What kind of exception is thrown if there's a problem opening or creating a StreamWriter

The standard output stream object enables a program to output data to the screen.

The enumeration FileAccess is used to:

Files can be stored in:

Class Directory is used to change directories.

A serialized object is an object that includes:

Introduction to Computers, the Internet and Visual C#

Dive Into Visual Studio Community

Introduction to C# Apps

Introduction to Classes,Objects,Methods and Strings

Control Statements: Part 1

Control Statements: Part 2

Methods: a Deeper Look

Arrays;Introduction to Exception Handling

Introduction to Linq and Generic Collections

Classes and Objects: A Deeper Look

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling: A Deeper Look

GUI With Windows Forms: Part 1

GUI With Windows Forms: Part 2

Strings,Characters and Regular Expressions

Searching and Sorting

Data Structures

Generics

Collections

Databases and LING

Asynchronous Programming With Async and Await

XML

GUI With Windows Presentation Foundation

Filters