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Programming in C#

Question No: 91 – (Topic 1)

You are creating a console application by using C#.

You need to access the assembly found in the file named car.dll. Which code segment should you use?

1. Assembly.Load();

2. Assembly.GetExecutingAssembly();

3. This.GetType();

4. Assembly.LoadFile(quot;car.dllquot;);

Answer: D Explanation:

Assembly.LoadFile – Loads the contents of an assembly file on the specified path. http://msdn.microsoft.com/en-us/library/b61s44e8.aspx

Question No: 92 – (Topic 1)

You are adding a public method named UpdateScore to a public class named ScoreCard.

The code region that updates the score field must meet the following requirements:

-> It must be accessed by only one thread at a time.

-> It must not be vulnerable to a deadlock situation.

You need to implement the UpdateScore() method. What should you do?

1. Option A

2. Option B

3. Option C

4. Option D

Answer: B Explanation:

http://blogs.msdn.com/b/bclteam/archive/2004/01/20/60719.aspx

Question No: 93 – (Topic 1)

You are testing an application. The application includes methods named CalculateInterest and LogLine. The CalculateInterest() method calculates loan interest. The LogLine() method sends diagnostic messages to a console window.

The following code implements the methods. (Line numbers are included for reference only.)

You have the following requirements:

-> The Calculatelnterest() method must run for all build configurations.

-> The LogLine() method must run only for debug builds.

You need to ensure that the methods run correctly.

What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

1. Insert the following code segment at line 01:

   #region DEBUG

   Insert the following code segment at line 10:

   #endregion

2. Insert the following code segment at line 10: [Conditional(MDEBUGquot;)]

3. Insert the following code segment at line 05:

   #region DEBUG

   Insert the following code segment at line 07:

   #endregion

4. Insert the following code segment at line 01:

   #if DE30G

   Insert the following code segment at line 10:

   #endif

5. Insert the following code segment at line 01: [Conditional(MDEBUGquot;)]

6. Insert the following code segment at line 05:

   #if DEBUG

   Insert the following code segment at line 07:

   #endif

7. Insert the following code segment at line 10: [Conditional(quot;RELEASEquot;)]

Answer: B,F Explanation:

#if DEBUG: The code in here won#39;t even reach the IL on release. [Conditional(quot;DEBUGquot;)]: This code will reach the IL, however the calls to the method will not execute unless DEBUG is on.

http://stackoverflow.com/questions/3788605/if-debug-vs-conditionaldebug

Question No: 94 – (Topic 1)

An application receives JSON data in the following format:

The application includes the following code segment. (Line numbers are included for reference only.)

You need to ensure that the ConvertToName() method returns the JSON input string as a Name object.

Which code segment should you insert at line 10?

1. Return ser.ConvertToTypelt;Namegt;(json);

2. Return ser.DeserializeObject(json);

3. Return ser.Deserializelt;Namegt;(json);

4. Return (Name)ser.Serialize(json);

Answer: C Explanation:

JavaScriptSerializer.Deserializelt;Tgt; – Converts the specified JSON string to an object of type T.

http://msdn.microsoft.com/en-us/library/bb355316.aspx

Question No: 95 DRAG DROP – (Topic 1)

You are developing an application by using C#. The application will process several objects per second.

You need to create a performance counter to analyze the object processing.

Which three actions should you perform in sequence? (To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.)

Answer:

Explanation:

Box 1: Create a CounterCreationDataCollection collection. Then create the counters as CounterCreationData object and set necessary properties.

Box 2: Add ConterCreationData to the collection by calling the Add() method of the

collection

Box 3: Call the Create method of the PerformanceCounterCategory and pass the collection to the method

CounterCreationDataCollection counterDataCollection = new CounterCreationDataCollection(); // Box1

// Add the counter. Box 1

CounterCreationData averageCount64 = new CounterCreationData(); averageCount64.CounterType = PerformanceCounterType.AverageCount64; averageCount64.CounterName = quot;AverageCounter64Samplequot;; counterDataCollection.Add(averageCount64);

// Add the base counter.

CounterCreationData averageCount64Base = new CounterCreationData(); averageCount64Base.CounterType = PerformanceCounterType.AverageBase; averageCount64Base.CounterName = quot;AverageCounter64SampleBasequot;; counterDataCollection.Add(averageCount64Base); // Box 2

// Create the category. Box 3 PerformanceCounterCategory.Create(quot;AverageCounter64SampleCategoryquot;, quot;Demonstrates usage of the AverageCounter64 performance counter type.quot;, PerformanceCounterCategoryType.SingleInstance, counterDataCollection);

Question No: 96 DRAG DROP – (Topic 1)

You are developing an application that includes a class named Warehouse. The Warehouse class includes a static property named Inventory- The Warehouse class is defined by the following code segment. (Line numbers are included for reference only.)

You have the following requirements:

-> Initialize the _inventory field to an Inventory instance.

-> Initialize the _inventory field only once.

-> Ensure that the application code acquires a lock only when the _inventory object must be instantiated.

You need to meet the requirements.

Which three code segments should you insert in sequence at line 09? (To answer, move the appropriate code segments from the list of code segments to the answer area and arrange them in the correct order.)

Answer:

Explanation:

After taking a lock you must check once again the _inventory field to be sure that other threads didn#39;t instantiated it in the meantime.

Question No: 97 DRAG DROP – (Topic 1)

You are creating a class named Data that includes a dictionary object named _data.

You need to allow the garbage collection process to collect the references of the _data object.

How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locations in the answer area. Each code segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

Answer:

Question No: 98 – (Topic 1)

You are adding a public method named UpdateGrade to a public class named ReportCard.

The code region that updates the grade field must meet the following requirements:

-> It must be accessed by only one thread at a time.

-> It must not be vulnerable to a deadlock situation.

You need to implement the UpdateGrade() method. What should you do?

1. Option A

2. Option B

3. Option C

4. Option D

Answer: A

Question No: 99 – (Topic 1)

You are developing an application that includes the following code segment. (Line numbers are included for reference only.)

The GetAnimals() method must meet the following requirements:

-> Connect to a Microsoft SQL Server database.

-> Create Animal objects and populate them with data from the database.

-> Return a sequence of populated Animal objects.

You need to meet the requirements.

Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

1. Insert the following code segment at line 16: while(sqlDataReader.NextResult())

2. Insert the following code segment at line 13: sqlConnection.Open();

3. Insert the following code segment at line 13:

   sqlConnection.BeginTransaction();

4. Insert the following code segment at line 16: while(sqlDataReader.Read())

5. Insert the following code segment at line 16: while(sqlDataReader.GetValues())

Answer: B,D Explanation:

SqlConnection.Open – Opens a database connection with the property settings specified by the

ConnectionString.

http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.open.aspx SqlDataReader.Read – Advances the SqlDataReader to the next record. http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldatareader.read.aspx

Question No: 100 DRAG DROP – (Topic 1)

You are developing a class named ExtensionMethods.

You need to ensure that the ExtensionMethods class implements the IsEmail() method on string objects.

How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locations in the answer area. Each code segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

Answer:

Topic 2, Volume B

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