70-483 | Microsoft 70-483 Practice Exam 2020

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NEW QUESTION 1
HOTSPOT
You are developing an application in C#.
You need to implement a custom exception for the application. You have the following code.
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How should you complete the code? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.
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  • A. Mastered
  • B. Not Mastered

Answer: A

Explanation:
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NEW QUESTION 2
You are developing an application.
You need to declare a delegate for a method that accepts an integer as a parameter, and then returns an integer. Which type of delegate should you use?

  • A. Action< string, string>
  • B. Func<string, string>
  • C. Func< string>
  • D. Action< string>

Answer: B

NEW QUESTION 3
HOTSPOT
You plan to implement the following interfaces:
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You have the following methods:
getCelsiusFromKelvin returns the temperature in Celsius. getFahrenheitFromKelvin returns the temperature in Fahrenheit.
You need to implement both interfaces within a class named TempControl. The TempControl class must return the Celsius temperature as the default temperature if the following code executes.
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How should you implement the interfaces? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
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  • A. Mastered
  • B. Not Mastered

Answer: A

Explanation:
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NEW QUESTION 4
An application is throwing unhandled NullReferenceException and FormatException errors. The stack trace shows that the exceptions occur in the GetWebResult() method.
The application includes the following code to parse XML data retrieved from a web service. (Line numbers are included for reference only.)
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You need to handle the exceptions without interfering with the existing error-handling infrastructure. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)
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  • A. Option A
  • B. Option B
  • C. Option C
  • D. Option D

Answer: AC

Explanation:
A: The TryParse method is like the Parse method, except the TryParse method does not throw an exception if the conversion fails. It eliminates the need to use exception handling to test for a FormatException in the event that s is invalid and cannot be successfully parsed.
C: UnhandledException event handler
If the UnhandledException event is handled in the default application domain, it is raised there for any unhandled exception in any thread, no matter what application domain the thread started in. If the thread started in an application domain that has an event handler for UnhandledException, the event is raised in that application domain.

NEW QUESTION 5
You are developing an application that includes a class named Customer and a generic list of customers. The following code segment declares the list of customers:
List<Customer> customersList = new List<Customer> () ;
You populate the customersList object with several hundred Customer objects. The application must display the data for five Customer objects at a time.
You need to create a method that will return the correct number of Customer objects. Which code segment should you use?
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  • A. Option A
  • B. Option B
  • C. Option C
  • D. Option D

Answer: A

Explanation:
Note: Something wrong with question as the question is about LINQ, while the answers are about class definitions (and not LINQ method definitions).

NEW QUESTION 6
DRAG DROP
You are developing an application that implements a set of custom exception types. You declare the custom exception types by using the following code segments:
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The application includes a function named DoWork that throws .NET Framework exceptions and custom exceptions.
The application contains only the following logging methods:
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The application must meet the following requirements:
When AdventureWorksValidationException exceptions are caught, log the information by using the static void Log (AdventureWorksValidationException ex) method.
When AdventureWorksDbException or other AdventureWorksException exceptions are caught, log the information by using the static void I oq( AdventureWorksException ex) method.
You need to meet the requirements.
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.)
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  • A. Mastered
  • B. Not Mastered

Answer: A

Explanation:
Go from the most specific exception to the least on. So the order would be:
1. AdventureWorksValidationException – catch this ex
2. AdventureWorksException – catch AdventureWorksDbException and other AdventureWorksExceptions
3. Exception – catch all the rest

NEW QUESTION 7
You need to write a method that retrieves data from a Microsoft Access 2013 database. The method must meet the following requirements:
Be read-only.
Be able to use the data before the entire data set is retrieved.
Minimize the amount of system overhead and the amount of memory usage. Which type of object should you use in the method?

  • A. SqlDataAdapter
  • B. DataContext
  • C. DbDataAdapter
  • D. OleDbDataReader

Answer: D

Explanation:
OleDbDataReader Class
Provides a way of reading a forward-only stream of data rows from a data source. Example:
OleDbConnection cn = new OleDbConnection(); OleDbCommand cmd = new OleDbCommand(); DataTable schemaTable;
OleDbDataReader myReader;
//Open a connection to the SQL Server Northwind database.
cn.ConnectionString = "Provider=SQLOLEDB;Data Source=server;User ID=login; Password=password;Initial Catalog=Northwind";

NEW QUESTION 8
You are creating a console application named App1.
App1 retrieves data from the Internet by using JavaScript Object Notation (JSON).
You are developing the following code segment (line numbers are included for reference only):
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You need to ensure that the code validates the JSON string. Which code should you insert at line 03?

  • A. DataContractSerializer serializer = new DataContractSerializer();
  • B. var serializer = new DataContractSerializer();
  • C. XmlSerlalizer serializer = new XmlSerlalizer();
  • D. var serializer = new JavaScriptSerializer();

Answer: D

Explanation:
The JavaScriptSerializer Class Provides serialization and deserialization functionality for AJAXenabled applications.
The JavaScriptSerializer class is used internally by the asynchronous communication layer to serialize and deserialize the data that is passed between the browser and the Web server. You cannot access that instance of the serializer. However, this class exposes a public API. Therefore, you can use the class when you want to work with JavaScript Object Notation (JSON) in managed code.

NEW QUESTION 9
HOTSPOT
You are implementing a library method that accepts a character parameter and returns a string. If the lookup succeeds, the method must return the corresponding string value. If the lookup fails, the method must return the value "invalid choice."
You need to implement the lookup algorithm.
How should you complete the relevant code? (To answer, select the correct keyword in each dropdown list in the answer area.)
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  • A. Mastered
  • B. Not Mastered

Answer: A

Explanation:

switch(letter){ case ‘a’:
case ‘m’: default:
}
Reference: switch (C# Reference)
http://msdn.microsoft.com/en-us/library/06tc147t(v=vs.110).aspx

NEW QUESTION 10
You are developing an application that uses a .config file. The relevant portion of the .config file is shown as follows:
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You need to ensure that diagnostic data for the application writes to the event log by using the configuration specified in the .config file.
What should you include in the application code?
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  • A. Option A
  • B. Option B
  • C. Option C
  • D. Option D

Answer: C

Explanation:
The Trace.Writeline statements will be included in the Release compilation by default. Incorrect:
Not A: Debug.Writeline() statements will not be included in the Release compilation by default.

NEW QUESTION 11
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You have the following C# code. (Line numbers are included for reference only.)
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You need the foreach loop to display a running total of the array elements, as shown in the following output.
13610
15
Solution: You insert the following code at line 02:
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Does this meet the goal?

  • A. Yes
  • B. No

Answer: B

NEW QUESTION 12
You are developing an application that will use multiple asynchronous tasks to optimize performance.
You create three tasks by using the following code segment. (Line numbers are included for reference only.)
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You need to ensure that the ProcessTasks() method waits until all three tasks complete before continuing.
Which code segment should you insert at line 09?

  • A. Task.WaitFor(3);
  • B. tasks.Yield();
  • C. tasks.WaitForCompletion();
  • D. Task.WaitAll(tasks);

Answer: D

Explanation:
The Task.WaitAll method (Task[]) waits for all of the provided Task objects to complete execution. Example:
// Construct started tasks
Task<int>[] tasks = new Task<int>[n]; for (int i = 0; i < n; i++)
{
tasks[i] = Task<int>.Factory.StartNew(action, i);
}
// Exceptions thrown by tasks will be propagated to the main thread
// while it waits for the tasks. The actual exceptions will be wrapped in AggregateException. try
{
// Wait for all the tasks to finish. Task.WaitAll(tasks);
// We should never get to this point
Console.WriteLine("WaitAll() has not thrown exceptions. THIS WAS NOT EXPECTED.");
}
Reference: Task.WaitAll Method (Task[]) https://msdn.microsoft.com/en-us/library/dd270695(v=vs.110).aspx

NEW QUESTION 13
You have a collection of Product objects named products. Each Product has a category. You need to determine the longest name for each category.
You write the following code.
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Which keyword should you use for Target 1?

  • A. Group
  • B. Where
  • C. Aggregate
  • D. Select

Answer: B

NEW QUESTION 14
HOTSPOT
You define a class by using the following code:
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To answer, complete each statement according to the information presented in the code.
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  • A. Mastered
  • B. Not Mastered

Answer: A

Explanation:
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NEW QUESTION 15
You use the Task.Run() method to launch a long-running data processing operation. The data processing operation often fails in times of heavy network congestion.
If the data processing operation fails, a second operation must clean up any results of the first operation.
You need to ensure that the second operation is invoked only if the data processing operation throws an unhandled exception.
What should you do?

  • A. Create a task within the operation, and set the Task.StartOnError property to true.
  • B. Create a TaskFactory object and call the ContinueWhenAll() method of the object.
  • C. Create a task by calling the Task.ContinueWith() method.
  • D. Use the TaskScheduler class to create a task and call the TryExecuteTask() method on the clas

Answer: C

Explanation:
Task.ContinueWith - Creates a continuation that executes asynchronously when the target Task completes.The returned Task will not be scheduled for execution until the current task has completed, whether it completes due to running to completion successfully, faulting due to an unhandled exception, or exiting out early due to being canceled.
http://msdn.microsoft.com/en-us/library/dd270696.aspx

NEW QUESTION 16
HOTSPOT
You are building an application in Microsoft Visual Studio 2013. You have the following code.
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For each of the following statements, select Yes if the statement is true. Otherwise, select No.
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  • A. Mastered
  • B. Not Mastered

Answer: A

Explanation:
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NEW QUESTION 17
You have the following code. (Line numbers are included for reference only.)
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What is the output of line 04?

  • A. Error
  • B. null
  • C. NaN

Answer: B

NEW QUESTION 18
You plan to create a list of customers named customers. Each customer will have a name and a key. The name and the key will be strings.
You will use the following code to retrieve customers from the list. customers[aKey].toString();
You need to identify which class must be used to declare the customers list. The solution must ensure that each key is unique. Which class should you identify?

  • A. ArrayList
  • B. Dictionary
  • C. List
  • D. Array

Answer: B

NEW QUESTION 19
You are creating a console application named Appl.
App1 retrieves data from the Internet by using JavaScript Object Notation (JSON).
You are developing the following code segment (line numbers are included for reference only):
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You need to ensure that the code validates the JSON string. Which code should you insert at line 03?
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  • A. Option A
  • B. Option B
  • C. Option C
  • D. Option D

Answer: B

Explanation:
JavaScriptSerializer().Deserialize
Converts the specified JSON string to an object of type T. Example:
string json = File.ReadAllText(Environment.CurrentDirectory + @"\JSON.txt"); Company company = new System.Web.Script.Serialization.JavaScriptSerializer().Deserialize<Company>(
Reference: C# - serialize object to JSON format using JavaScriptSerializer http://matijabozicevic.com/blog/csharp-net-development/csharp-serialize-object-to-json-formatusing- javascriptserialization

NEW QUESTION 20
You are developing an application by using C#. The application includes the following code segment. (Line numbers are included for reference only.)
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The DoWork() method must not throw any exceptions when converting the obj object to the IDataContainer interface or when accessing the Data property.
You need to meet the requirements. Which code segment should you insert at line 07?

  • A. var dataContainer = (IDataContainer)obj;
  • B. dynamic dataContainer = obj;
  • C. var dataContainer = obj is IDataContainer;
  • D. var dataContainer = obj as IDataContainer;

Answer: D

Explanation:
As - The as operator is like a cast operation. However, if the conversion isn't possible, as returns null instead of raising an exception.
http://msdn.microsoft.com/en-us/library/cscsdfbt(v=vs.110).aspx

NEW QUESTION 21
You are developing an assembly.
You plan to sign the assembly when the assembly is developed. You need to reserve space in the assembly for the signature.
What should you do?

  • A. Run the Assembly Linker tool from the Windows Software Development Kit (Windows SDK).
  • B. Run the Strong Name tool from the Windows Software Development Kit (Windows SDK).
  • C. Add the AssemblySignatureKeyAttribute attribute the assembly.
  • D. Add the AssemblyDelaySignAttribute attribute to the assembly.

Answer: D

Explanation:
The AssemblyDelaySignAttribute class specifies that the assembly is not fully signed when created. Reference: https://msdn.microsoft.com/enus/ library/system.refilection.assemblydelaysignattribute(v=vs.110).aspx

NEW QUESTION 22
DRAG DROP
You are developing an application by using C#. The application will output the text string "First Line" followed by the text string "Second Line".
You need to ensure that an empty line separates the text strings.
Which four code segments should you use in sequence? (To answer, move the appropriate code segments to the answer area and arrange them in the correct order.)
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  • A. Mastered
  • B. Not Mastered

Answer: A

Explanation:
Box 1:
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First we create the variable.
Box 2:
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We create the first text line.
Box 3:
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We add a blank line.
The StringBuilder.AppendLine method appends the default line terminator to the end of the current StringBuilder object.
Box 4:
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Finally we add the second line.

NEW QUESTION 23
DRAG DROP
You are developing an application that implements a set of custom exception types. You declare the custom exception types by using the following code segments:
70-483 dumps exhibit
The application includes a function named DoWork that throws .NET Framework exceptions and custom exceptions. The application contains only the following logging methods:
70-483 dumps exhibit
The application must meet the following requirements:
When ContosoValidationException exceptions are caught, log the information by using the static void Log (ContosoValidationException ex) method.
When ContosoDbException or other ContosoException exceptions are caught, log the information by using the static void Log(ContosoException ex) method.
You need to meet the requirements.
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.)
70-483 dumps exhibit

  • A. Mastered
  • B. Not Mastered

Answer: A

Explanation:
Catch the most specific exception first.

NEW QUESTION 24
You are developing an application. The application calls a method that returns an array of integers named customerIds. You define an integer variable named customerIdToRemove and assign a value to it. You declare an array named filteredCustomerIds.
You have the following requirements.
Remove duplicate integers from the customerIds array.
Sort the array in order from the highest value to the lowest value.
Remove the integer value stored in the customerIdToRemove variable from the customerIds array. You need to create a LINQ query to meet the requirements.
Which code segment should you use?
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  • A. Option A
  • B. Option B
  • C. Option C
  • D. Option D

Answer: C

Explanation:
The Distinct keyword avoids duplicates, and OrderByDescending provides the proper ordering from highest to lowest.

NEW QUESTION 25
You are developing an application that includes the following code segment. (Line numbers are included for reference only.)
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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.)

  • A. Insert the following code segment at line 16: while(sqlDataReader.NextResult())
  • B. Insert the following code segment at line 13: sqlConnection.Open();
  • C. Insert the following code segment at line 13: sqlConnection.BeginTransaction();
  • D. Insert the following code segment at line 16: while(sqlDataReader.Read())
  • E. Insert the following code segment at line 16: while(sqlDataReader.GetValues())

Answer: BD

Explanation:
B: SqlConnection.Open - Opens a database connection with the property settings specified by the ConnectionString.
Reference: http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.open.aspx D: SqlDataReader.Read - Advances the SqlDataReader to the next record. Reference: http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldatareader.read.aspx

NEW QUESTION 26
You are developing an application that uses a .config file. The relevant portion of the .config file is shown as follows:
70-483 dumps exhibit
You need to ensure that diagnostic data for the application writes to the event tog by using the configuration specified in the .config file.
What should you include in the application code?
70-483 dumps exhibit

  • A. Option A
  • B. Option B
  • C. Option C
  • D. Option D

Answer: D

Explanation:
Incorrect:
Not B: There is only a “TraceListener” defined in the config file. In fact, there is no “eventlogDebugListener” class.

NEW QUESTION 27
You are developing an application. The application includes classes named Mammal and Animal and an interface named IAnimal.
The Mammal class must meet the following requirements:
It must either inherit from the Animal class or implement the IAnimal interface. It must be inheritable by other classes in the application.
You need to ensure that the Mammal class meets the requirements.
Which two code segments can you use to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
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  • A. Option A
  • B. Option B
  • C. Option C
  • D. Option D

Answer: AC

Explanation:
When applied to a class, the sealed modifier prevents other classes from inheriting from it. Reference: http://msdn.microsoft.com/en-us/library/88c54tsw(v=vs.110).aspx

NEW QUESTION 28
You are creating an application that manages information about zoo animals. The application includes a class named Animal and a method named Save.
The Save() method must be strongly typed. It must allow only types inherited from the Animal class that uses a constructor that accepts no parameters.
You need to implement the Save() method. Which code segment should you use?
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  • A. Option A
  • B. Option B
  • C. Option C
  • D. Option D

Answer: C

Explanation:
The condition new() ensures the empty/default constructor and must be the last condition.
When you define a generic class, you can apply restrictions to the kinds of types that client code can use for type arguments when it instantiates your class. If client code tries to instantiate your class by
using a type that is not allowed by a constraint, the result is a compile-time error. These restrictions are called constraints. Constraints are specified by using the where contextual keyword. http://msdn.microsoft.com/en-us/library/d5x73970.aspx

NEW QUESTION 29
A public class named Message has a method named SendMessage. The SendMessage() method is leaking memory.
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  • A. Add a finally statement and implement the gc.collect() method.
  • B. Modify the Message class to use the IDisposable interface.
  • C. Remove the try…catch block and allow the errors to propagate.
  • D. Replace the try…catch block with a using statement.

Answer: A

Explanation:
Reference: https://docs.microsoft.com/enus/ dotnet/api/system.gc.collect?redirectedfrom=MSDN&view=netframework- 4.7.2#System_GC_Collect

NEW QUESTION 30
DRAG DROP
You are developing a class named ExtensionMethods.
You need to ensure that the ExtensionMethods class implements the IsEmail() extension 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.)
70-483 dumps exhibit

  • A. Mastered
  • B. Not Mastered

Answer: A

Explanation:
Extensions must be in a static class as it kind of a shared source of extension methods. You do not instantiate the class.
The key word “this” is simply a syntax how you tell the compiler, that your method IsUrl is extension for the String object

NEW QUESTION 31
......

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