Microsoft 70-483 Bootcamp 2021

NEW QUESTION 1
You are developing an application that contains a class named TheaterCustomer and a method named ProcessTheaterCustomer. The ProcessTheaterCustomer() method accepts a TheaterCustomer object as the input parameter.
You have the following requirements:
Store the TheaterCustomer objects in a collection.
Ensure that the ProcessTheaterCustomer() method processes the TheaterCustomer objects in the order in which they are placed into the collection.
You need to meet the requirements. What should you do?

• A. Create a System.Collections.Stack collectio
• B. Use the Push() method to add TheaterCustomerobjects to the collection, Use the Peek() method to pass the objects to the ProcessTheaterCustomer() method.
• C. Create a System.Collections.Queue collectio
• D. Use the Enqueue() method to add TheaterCustomer objects to the collectio
• E. Use the Dequeue() method to pass the objects to the ProcessTheaterCustomer() method.
• F. Create a System.Collections.SortedList collectio
• G. Use the Add() method to add TheaterCustomer objects to the collectio
• H. Use the Remove() method to pass the objects to the ProcessTheaterCustomer() method.
• I. Create a System.Collections.ArrayList collectio
• J. Use the Insert() method to add TheaterCustomer objects to the collectio
• K. Use the Remove() method to pass the objects to the ProcessTheaterCustomer() method.

Answer: B

Explanation:
The System.Collections.Queue collection represents a first-in, first-out collection of objects. Reference: https://msdn.microsoft.com/en-us/library/system.collections.queue(v=vs.110).aspx

NEW QUESTION 2
DRAG DROP
You have the following class. (Line numbers are included for reference only.)

You need to complete the doOperation method to meet the following requirements:
If AddNumb is passed as the operationName parameter, the AddNumb function is called. If SubNumb is passed as the operationName parameter, the SubNumb function is called.
Which code should you insert at line 16? Develop the solution by selecting and arranging the required code blocks in the correct order. You may not need all of the code blocks.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Note:
* target 2:
GetType() is a method you call on individual objects, to get the execution-time type of the object. Incorrect: typeof is an operator to obtain a type known at compile-time (or at least a generic type parameter). The operand of typeof is always the name of a type or type parameter - never an expression with a value (e.g. a variable). See the C# language specification for more details. Reference: What is the difference of getting Type by using GetType() and typeof()? http://stackoverflow.com/questions/11312111/when-and-where-to-use-gettype-or-typeof

NEW QUESTION 3
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 4
You are developing an application that includes methods named ConvertAmount and TransferFunds. You need to ensure that the precision and range of the value in the amount variable is not lost when the TransferFunds() method is called.
Which code segment should you use?

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

Answer: C

Explanation:
Simply use float for the TransferFunds parameter. Note:
* The float keyword signifies a simple type that stores 32-bit floating-point values.
* The double keyword signifies a simple type that stores 64-bit floating-point values

NEW QUESTION 5
You are developing an application that will be deployed to multiple computers. You set the assembly name.
You need to create a unique identity for the application assembly.
Which two assembly identity attributes should you include in the source code? (Each correct answer presents part of the solution. Choose two.)

• A. AssemblyDelaySignAttribute
• B. AssemblyCompanyAttribute
• C. AssemblyProductAttribute
• D. AssemblyCultureAttribute
• E. AssemblyVersionAttribute

Answer: DE

Explanation:
The AssemblyName object contains information about an assembly, which you can use to bind to that assembly. An assembly's identity consists of the following:
Simple name. Version number.
Cryptographic key pair. Supported culture.
D: AssemblyCultureAttribute
Specifies which culture the assembly supports.
The attribute is used by compilers to distinguish between a main assembly and a satellite assembly. A main assembly contains code and the neutral culture's resources. A satellite assembly contains only resources for a particular culture, as in [assembly:AssemblyCultureAttribute("de")]
E: AssemblyVersionAttribute
Specifies the version of the assembly being attributed.
The assembly version number is part of an assembly's identity and plays a key part in binding to the assembly and in version policy.

NEW QUESTION 6
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 CalculateInterest() 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.)

• A. Insert the following code segment at line 01:#region DEBUGInsert the following code segment at line 10:#endregion
• B. Insert the following code segment at line 01: [Conditional("DEBUG")]
• C. Insert the following code segment at line 05:#region DEBUGInsert the following code segment at line 07:#endregion
• D. Insert the following code segment at line 10: [Conditional("DEBUG")]
• E. Insert the following code segment at line 01:#if DEBUGInsert the following code segment at line 10:#endif
• F. Insert the following code segment at line 10: [Conditional("RELEASE")]
• G. Insert the following code segment at line 05:#if DEBUGInsert the following code segment at line 07:#endif

Answer: DG

Explanation:
D: Also, it's worth pointing out that you can use [Conditional("DEBUG")] attribute on methods that return void to have them only executed if a certain symbol is defined. The compiler would remove all calls to those methods if the symbol is not defined:
[Conditional("DEBUG")] void PrintLog() {
Console.WriteLine("Debug info");
}
void Test() { PrintLog();
}
G: When the C# compiler encounters an #if directive, followed eventually by an #endif directive, it will compile the code between the directives only if the specified symbol is defined. Unlike C and C++, you cannot assign a numeric value to a symbol; the #if statement in C# is Boolean and only tests whether the symbol has been defined or not. For example,
#define DEBUG
#if DEBUG
Console.WriteLine("Debug version");
#endif
Reference: http://stackoverflow.com/questions/2104099/c-sharp-if-then-directives-for-debug-vsrelease

NEW QUESTION 7
You are creating a class library that will be used in a web application. You need to ensure that the class library assembly is strongly named. What should you do?

• A. Use assembly attributes.
• B. Use the EdmGen.exe command-line tool.
• C. Set the configuration mode to Release when building the application.
• D. Use the gacutil.exe command-line too

Answer: A

NEW QUESTION 8
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:

The application includes a function named DoWork that throws .NET Framework exceptions and custom exceptions. The application contains only the following logging methods:

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.
When generic exceptions are caught, log the information by using the static void Log(Exception ex) method.
You need to meet the requirements. You have the following code:

Which code segments should you include in Target 1, Target 2 and Target 3 to complete the code? (To answer, drag the appropriate code segments to the correct targets 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 9
You are developing an application by using C#. You provide a public key to the development team during development.
You need to specify that the assembly is not fully signed when it is built.
Which two assembly attributes should you include in the source code? (Each correct answer presents part of the solution. Choose two.)

• A. AssemblyKeyNameAttribute
• B. ObfuscateAssemblyAttribute
• C. AssemblyDelaySignAttribute
• D. AssemblyKeyFileAttribute

Answer: CD

Explanation:
* AssemblyDelaySignAttribute
Specifies that the assembly is not fully signed when created.
* The following code example shows the use of the AssemblyDelaySignAttribute attribute with the AssemblyKeyFileAttribute.
using System;
using System.Refilection; [assembly:AssemblyKeyFileAttribute(“TestPublicKey.snk”)] [assembly:AssemblyDelaySignAttribute(true)]
namespace DelaySign
{
public class Test { }
}
Reference: http://msdn.microsoft.com/en-us/library/t07a3dye(v=vs.110).aspx

NEW QUESTION 10
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.

Which keyword should you use for Target 1?

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

Answer: B

NEW QUESTION 11
DRAG DROP
You are developing a function that takes a parameter named aParam as a string input.
You need to convert aParam to a Double. If the conversion cannot be completed, the function should return 0.

How should you complete the code? To answer, drag the appropriate code elements to the correct targets in the answer area. Each code element 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.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Target 1 : double
Target 2 : Double
Target 3 : out

NEW QUESTION 12
You are developing an application.
The application contains the following code segment (line numbers are included for reference only):

When you run the code, you receive the following error message: "Cannot implicitly convert type 'object'' to 'inf. An explicit conversion exists (are you missing a cast?)."
You need to ensure that the code can be compiled. Which code should you use to replace line 05?

• A. var2 = ((List<int>) array1) [0];
• B. var2 = array1[0].Equals(typeof(int));
• C. var2 = Convert.ToInt32(array1[0]);
• D. var2 = ((int[])array1)[0];

Answer: C

Explanation:
The Convert.ToInt32 method converts a specified value to a 32-bit signed integer. Reference: https://msdn.microsoft.com/en-us/library/system.convert.toint32(v=vs.110).aspx

NEW QUESTION 13
DRAG DROP
You are developing an application that will include a method named GetData. The GetData() method will retrieve several lines of data from a web service by using a System.IO.StreamReader object. You have the following requirements:
The GetData() method must return a string value that contains the entire response from the web service.
The application must remain responsive while the GetData() method runs. You need to implement the GetData() method.
How should you complete the relevant code? (To answer, drag the appropriate objects to the correct locations in the answer area. Each object 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Box 1. async
Box 2. await
Box 3. ReadLineAsync(); Incorrect:
Not Box 3: ReadToEndAsync() is not correct since only the first line of the response is required.

NEW QUESTION 14
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 15
You are developing an application that includes the following code segment. (Line numbers are included for reference only.)

You need to ensure that the application accepts only integer input and prompts the user each time non-integer input is entered.
Which code segment should you add at line 19?

• A. If (!int.TryParse(sLine, out number))
• B. If ((number = Int32.Parse(sLine)) == Single.NaN)
• C. If ((number = int.Parse(sLine)) > Int32.MaxValue)
• D. If (Int32.TryParse(sLine, out number))

Answer: A

Explanation:

Incorrect:
Not B, not C: These will throw exception when user enters non-integer value. Not D: This is exactly the opposite what we want to achieve.
Int32.TryParse - Converts the string representation of a number to its 32-bit signed integer equivalent. A return value indicates whether the conversion succeeded. http://msdn.microsoft.com/en-us/library/f02979c7.aspx

NEW QUESTION 16
You are developing an assembly that will be used by multiple applications. You need to install the assembly in the Global Assembly Cache (GAC).
Which two actions can you perform to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

• A. Use the Assembly Registration tool (regasm.exe) to register the assembly and to copy the assembly to the GAC.
• B. Use the Strong Name tool (sn.exe) to copy the assembly into the GAC.
• C. Use Microsoft Register Server (regsvr32.exe) to add the assembly to the GAC.
• D. Use the Global Assembly Cache tool (gacutil.exe) to add the assembly to the GAC.
• E. Use Windows Installer 2.0 to add the assembly to the GA

Answer: DE

Explanation:
There are two ways to deploy an assembly into the global assembly cache:
* Use an installer designed to work with the global assembly cache. This is the preferred option for installing assemblies into the global assembly cache.
* Use a developer tool called the Global Assembly Cache tool (Gacutil.exe), provided by the Windows
Software Development Kit (SDK). Note:
In deployment scenarios, use Windows Installer 2.0 to install assemblies into the global assembly cache. Use the Global Assembly Cache tool only in development scenarios, because it does not provide assembly reference counting and other features provided when using the Windows Installer. http://msdn.microsoft.com/en-us/library/yf1d93sz%28v=vs.110%29.aspx

NEW QUESTION 17
DRAG DROP
You are developing an application that will include a method named GetData. The GetData() method will retrieve several lines of data from a web service by using a System.IO.StreamReader object. You have the following requirements:
The GetData() method must return a string value that contains the first line of the response from the web service.
The application must remain responsive while the GetData() method runs. You need to implement the GetData() method.
How should you complete the relevant code? (To answer, drag the appropriate objects to the correct locations in the answer area. Each object 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Box 1. async
Box 2. await
Box 3. ReadLineAsync(); Incorrect:
Not Box 3: ReadToEndAsync() is not correct since only the first line of the response is required.

NEW QUESTION 18
You are developing an application that uses several objects. The application includes the following code segment. (Line numbers are included for reference only.)

You need to evaluate whether an object is null. Which code segment should you insert at line 03?

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

Answer: B

Explanation:
Use the == operator to compare values and in this case also use the null literal.

NEW QUESTION 19
You are developing an application by using C#.
The application includes an object that performs a long running process.
You need to ensure that the garbage collector does not release the object's resources until the process completes.
Which garbage collector method should you use?

• A. RemoveMemoryPressure()
• B. ReRegisterForFinalize()
• C. WaitForFullGCComplete()
• D. KeepAlive()

Answer: D

Explanation:
The purpose of the KeepAlive method is to ensure the existence of a reference to an object that is at risk of being prematurely reclaimed by the garbage collector.
Reference: GC.KeepAlive Method (Object)
https://msdn.microsoft.com/en-us/library/system.gc.keepalive(v=vs.110).aspx

NEW QUESTION 20
DRAG DROP
You have the following code.
string MessageString = “This is the original message!”;
You need to store the SHA1 hash value of MessageString in a variable named HashValue. Which code should you use? Develop the solution by selecting and arranging the required code blocks in the correct order. You may not need all of the code blocks.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Reference: Ensuring Data Integrity with Hash Codes https://msdn.microsoft.com/en-us/library/f9ax34y5(v=vs.110).aspx

NEW QUESTION 21
DRAG DROP
You have the following code:

You need to display all of the vehicles that start with the letter “A”.
How should you complete the code? To answer, drag the appropriate code elements to the correct targets. Each code element 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.
NOTE: Each correct selection is worth one point.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 22
You are developing an application by using C#. The application includes the following code segment. (Line numbers are included for reference only.)

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 23
You have the following code:

You need to retrieve all of the numbers from the items variable that are greater than 80. Which code should you use?

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

Answer: B

Explanation:
Enumerable.Where<TSource> Method (IEnumerable<TSource>, Func<TSource, Boolean>) Filters a sequence of values based on a predicate.
Example: List<string> fruits =
new List<string> { "apple", "passionfruit", "banana", "mango", "orange", "blueberry", "grape", "strawberry" }; IEnumerable<string> query = fruits.Where(fruit => fruit.Length < 6); foreach (string fruit in query)
{
Console.WriteLine(fruit);
}
/*
This code produces the following output: apple
mango
grape
*/

NEW QUESTION 24
DRAG DROP
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. You have the following code:

Which code segments should you include in Target 1 and Target 2 to complete the 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
* WeakReference influences the garbage collector. Most objects that are referenced must be kept in memory until they are unreachable. But with WeakReference, objects that are referenced can be collected.
* Example: C# program that uses WeakReference using System;
using System.Text; class Program
{
/// <summary>
/// Points to data that can be garbage collected any time.
/// </summary>
static WeakReference _weak; static void Main()
{
// Assign the WeakReference.
_weak = new WeakReference(new StringBuilder("perls")); Reference: http://www.dotnetperls.com/weakreference

NEW QUESTION 25
DRAG DROP
You are developing an application that includes a class named Customer.
The application will output the Customer class as a structured XML document by using the following code segment:

You need to ensure that the Customer class will serialize to XML. You have the following code:

Which code segments should you include in Target 1, Target 2, Target 3 and Target 4 to complete the code? To answer, drag the appropriate code segments to the correct targets. 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.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 26
DRAG DROP
An application serializes and deserializes XML from streams. The XML streams are in the following format:

The application reads the XML streams by using a DataContractSerializer object that is declared by the following code segment:
var ser = new DataContractSerializer(typeof(Name));
You need to ensure that the application preserves the element ordering as provided in the XML stream.
How should you complete the relevant code? (To answer, drag the appropriate attributes to the correct locations in the answer area-Each attribute 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Target 1: The DataContractAttribute.Namespace Property gets or sets the namespace for the data contract for the type. Use this property to specify a particular namespace if your type must return data that complies with a specific data contract.
Target2, target3: We put Order=10 on FirstName to ensure that LastName is ordered first. Note:
The basic rules for data ordering include:
* If a data contract type is a part of an inheritance hierarchy, data members of its base types are always first in the order.
* Next in order are the current type’s data members that do not have the Order property of the DataMemberAttribute attribute set, in alphabetical order.
* Next are any data members that have the Order property of the DataMemberAttribute attribute set. These are ordered by the value of the Order property first and then alphabetically if there is more than one member of a certain Order value. Order values may be skipped.
Reference: Data Member Order
https://msdn.microsoft.com/en-us/library/ms729813(v=vs.110).aspx Reference: DataContractAttribute.Namespace Property https://msdn.microsoft.com/enus/
library/system.runtime.serialization.datacontractattribute.namespace(v=vs.110).aspx

NEW QUESTION 27
You plan to debug an application remotely by using Microsoft Visual Studio 2013. You set a breakpoint in the code.
When you compile the application, you get the following error message: "The breakpoint will not currently be hit. No symbols have been loaded for this document."
You need to ensure that you can debug the application remotely. What should you do?

• A. Modify the Assemblylnfo.es file.
• B. Copy .exe files to the Symbols folder on the local computer.
• C. Copy the .cs files to the remote server.
• D. Use .NET Remote Symbol Loading.

Answer: A

Explanation:
References: https://msdn.microsoft.com/en-us/library/y7f5zaaa.aspx

NEW QUESTION 28
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):

You need to ensure that the code validates the JSON string. Which code should you insert at line 03?

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

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 29
You are debugging a 64-bit C# application.
Users report System.OutOfMemoryException exceptions. The system is attempting to use arrays larger than 2 GB in size.
You need to ensure that the application can use arrays larger than 2 GB. What should you do?

• A. Add the /3GB switch to the boot.ini file for the operating system.
• B. Set the IMAGE_FILE_LARGE_ADDRESS_AWARE flag in the image header for the application executable file.
• C. Set the value of the gcAllowVeryLargeObjects property to true in the application configuration file.
• D. Set the value of the user-mode virtual address space setting for the operating system to MAX.

Answer: C

Explanation:
On 64-bit platforms the gcAllowVeryLargeObjects enables arrays that are greater than 2 gigabytes (GB) in total size.
Reference: <gcAllowVeryLargeObjects> Element https://msdn.microsoft.com/en-us/library/hh285054(v=vs.110).aspx

NEW QUESTION 30
......