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Serialization in .NET

Q.1 According to given below statements, choose the correct option regarding serialization.

Statement 1: Serialization is the process of converting information into a byte stream that can be

stored or transferred.

Statement 2: Deserialization is the process of converting a serialized sequence of bytes into an

object.

Statement 3: Serialization is the process of converting a serialized sequence of bytes into an

object.

Statement 4: DeSerialization is the process of converting information into a byte stream that can

be stored or transferred.

A) Statement 1 and 2 are correct.

B) Statement 3 and 4 are correct.

C) Statement 1 and 4 are correct.

D) Statement 2 and 3 are correct.

Q.2 What are the steps to serialize an object?

A)

- Create a stream object.

- Create a BinaryFormatter Object.

- Call the BinaryFormatter.Serialize method.

B)

- Create a BinaryFormatter Object.

- Call the BinaryFormatter.Serialize method.

C)

- Create a stream object.

- Create a BinaryFormatter Object.

- Call the BinaryFormatter.Deserialize method.

D) None of the above.

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Q.3 Which of the following attributes should you add to a class to enable it to be serialized?

A) ISerializable

B) Serializable

C) SoapInclude

D) OnDeserialization

Q.4 Which of the following interfaces should you implement to enable you to run a method

after an instance of your class is serialized?

A) IFormatter

B) ISerializable

C) IDeserializationCallback

D) IObjectReference

Q.5 How many types of Serialization .NET supports?

A) Binary Serialization

B) SOAP Serialization

C) XML Serialization

D) All of the above.

Q.6 According to given below statements, choose the correct option regarding XML

serialization.

Statement 1: XML serialization provides the interoperability to communicate with different

platforms.

Statement 2: XML serialization cannot be used to serialize private data.

Statement 3: XML serialization can be used to serialize private data.

Statement 4: XML serialization does not provides the interoperability to communicate with

different platforms.

A) Only statement 1 is correct.

B) Statement 1 and 2 are correct.

C) Statement 3 and 4 are correct.

D) Only statement 4 is correct.

Q.7 Which of the following attributes would you use to cause a member to be serialized as

an attribute, rather than an element?

A) XmlAnyAttribute

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B) XMLType

C) XMLElement

D) XMLAttribute

Q.8 Which of the following attributes should you add to a member to prevent it from being

serialized by BinaryFormatter?

A) NonSerialized

B) Serializable

C) SerializationException

D) SoapIgnore

Ans. A

Q.9 Which of the following attributes should you add to a member to prevent it from being

serialized by XML serialization?

A) XMLType

B) XMLIgnore

C) XMLElement

D) XMLAttribute

Q.10 Which of the following are requirements for a class to be serialized with XML

serialization?

A) The class must be public.

B) The class must be private.

C) The class must have a parameterless constructor.

D) Option A and C are correct.

Q.11 What is/are the advantages of XML serialization? Choose the correct option.

A) Objects serialized by using XML are self-describing and easily processed.

B) An object that is serialized by using XML can be easily processed by an application written

for a different operating system in a different technology.

C) Option A and B both are correct.

D) None of the above.

Q.12 What are the steps to serialize an object by using XML Serialization?

A)

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- Create an XmlSerializer object by passing it the type of object you plan to serialize.

- Call the XmlSerializer.Serialize method to serialize the object.

B)

- Create a stream (TextWriter, or XmlWriter) object to hold the serialized output.

- Create an XmlSerializer object by passing it the type of object you plan to serialize.

- Call the XmlSerializer.Serialize method to serialize the object.

C)

- Create a stream (TextWriter, or XmlWriter) object to hold the serialized output.

- Call the XmlSerializer.Serialize method to serialize the object.

D) None of the above.

Q.13 Trace the output of given below code.

[XmlRoot ("CartItem")]

public class ShoppingCart

{

[XmlAttribute] public Int32 productId;

public decimal price;

public Int32 quantity;

[XmlIgnore] public decimal total;

public ShoppingCart()

{

}

}

Assume that productID=100, price=100.25 quantity=20.

A)

<?xml version="1.0" ?>

<CartItem productId="100">

<price>100.25</price>

<quantity>20</quantity>

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</CartItem>

B)

<?xml version="1.0" ?>

< ShoppingCart productId="100">

<price>100.25</price>

<quantity>20</quantity>

</ ShoppingCart >

C)

<?xml version="1.0" ?>

<CartItem>

< productId="100">

<price>100.25</price>

<quantity>20</quantity>

</CartItem>

D) None of the above.

Answers

1. ANSWER: A

2. ANSWER: A

Example:

using System.IO;

using System.Runtime.Serialization.Formatters.Binary;

class Program

{

static void Main(string[] args)

{

string data = "Welcome to the CareerRide.com .";

// Create file to save the data

FileStream fs = new FileStream("c:\\data.txt", FileMode.Create);

// Create a BinaryFormatter object to perform the serialization process

BinaryFormatter obj = new BinaryFormatter();

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// Use the BinaryFormatter object to serialize the data to the file

obj.Serialize(fs, data);

// Close the file

fs.Close();

}

}

If you run the above code and open the Data.txt file, you will see the contents of the string

you stored surrounded with binary information to describe the data for the deserialization.

3. ANSWER: B

Explanation:

If you apply Serializable attribute to a type, it indicate that instances of this type can

be serialized. If you do not want a field within your class to be serializable, apply the

NonSerializedAttribute attribute.

4. ANSWER: C

5. ANSWER: D

6. ANSWER: B

7. ANSWER: D

8. ANSWER: A

Explanation:

If you want that particular field should not be serialized then use NonSerialized

attribute.

[Serializable]

public class Employee

{

public int EmpID;

[NonSerialized] public int TotalSalary;

public String EmpName;

}

9. ANSWER: B

Explanation:

Use the XMLIgnore attribute to prevent a member from being serialized during

XML serialization.

10. ANSWER: D

11. ANSWER: C

12. ANSWER: B

Explanation:

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using System;

using System.IO;

using System.Xml.Serialization;

class Program

{

static void Main(string[] args)

{

FileStream fs = new FileStream("C:\\Date.XML", FileMode.Create);

// Create an XmlSerializer object to perform the serialization

XmlSerializer XMLObj = new XmlSerializer(typeof(DateTime));

// Use the XmlSerializer object to serialize the data.

XMLObj.Serialize(fs, System.DateTime.Now);

// Close the file

fs.Close();

}

}

13. ANSWER: A