Microsoft 70-483 Exam Dumps 2021

NEW QUESTION 1
You are developing an application that uses a .config file. The relevant portion of the .config file is shown as follows:

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?

• 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 2
HOTSPOT
You are evaluating the following C# method.

The receiver of the data has a copy of the public key.
For each of the following statements, select Yes if the statement is true. Otherwise, select No. NOTE: Each correct selection is worth one point.

Answer:

Explanation: Target 1: No
Target 2: Yes
Target 3: Yes

NEW QUESTION 3
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 4
DRAG DROP
You are creating a method that will split a single input file into two smaller output files. The method must perform the following actions:
Create a file named header.dat that contains the first 20 bytes of the input file. Create a file named body.dat that contains the remainder of the input file. You need to create the method.
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:

Explanation: “offset” and “count” parameters of “Stream.Read” / “Stream.Write” methods ALWAYS refer to the array you are sending in the first parameter.
The position of fsSource advances as you read it, unless you seed on it.

NEW QUESTION 5
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 6
You are developing a C# application named Application1 by using Microsoft Visual Studio 2021. You plan to compare the memory usage between different builds of Application1.
You need to record the memory usage of each build. What should you use from Visual Studio?

• A. IntelliTrace
• B. Memory Usage from Performance Profiler
• C. Performance Wizard from Performance Profiler
• D. Code Analysis

Answer: B

NEW QUESTION 7
You are creating an application that manages information about your company's products. The application includes a class named Product and a method named Save.
The Save() method must be strongly typed. It must allow only types inherited from the Product class that use a constructor that accepts no parameters.
You need to implement the Save() method. Which code segment should you use?

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

Answer: D

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 8
You are developing an application that includes the following code segment. (Line numbers are included for reference only.)

You need to ensure that the DoWork(Widget widget) method runs. With which code segment should you replace line 24?

• A. DoWork((Widget)o);
• B. DoWork(new Widget(o));
• C. DoWork(o is Widget);
• D. DoWork((ItemBase)o);

Answer: A

NEW QUESTION 9
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 'int'. 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 = arrayl[0] is int;
• B. var2 = ((List<int>)arrayl) [0];
• C. var2 = arrayl[0].Equals(typeof(int));
• D. var2 = (int) arrayl [0];

Answer: D

NEW QUESTION 10
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.)

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:

Does this meet the goal?

• A. Yes
• B. No

Answer: B

NEW QUESTION 11
HOTSPOT
You are developing an application in C#. You need to create an anonymous method. You write the following code segment.

How should you complete the code? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.

Answer:

Explanation: Target 1: delegate
Target 2: void
Target 3: delegate References:

NEW QUESTION 12
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.)

Answer:

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 13
You are developing an application that will transmit large amounts of data between a client computer and a server. You need to ensure the validity of the data by using a cryptographic hashing algorithm. Which algorithm should you use?

• A. ECDsa
• B. RNGCryptoServiceProvider
• C. Rfc2898DeriveBytes
• D. HMACSHA512

Answer: D

Explanation: The HMACSHA512 class computes a Hash-based Message Authentication Code (HMAC) using the SHA512 hash function.
Reference: https://msdn.microsoft.com/enus/ library/system.security.cryptography.hmacsha512(v=vs.110).aspx

NEW QUESTION 14
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 csc.exe /target:Library option when building the application.
• C. Use the xsd.exe command-line tool.
• D. Use the EdmGen.exe command-line tool.

Answer: A

Explanation: The Windows Software Development Kit (SDK) provides several ways to sign an assembly with a strong name:
* (A) Using assembly attributes to insert the strong name information in your code. You can use either the AssemblyKeyFileAttribute or the AssemblyKeyNameAttribute, depending on where the key file to be used is located.
* Using the Assembly Linker (Al.exe) provided by the Windows SDK.
* Using compiler options such /keyfile or /delaysign in C# and Visual Basic, or the /KEYFILE or
/DELAYSIGN linker option in C++. (For information on delay signing, see Delay Signing an Assembly.)

NEW QUESTION 15
DRAG DROP
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't instantiated it in the meantime.
First, you check if the inventory is null, if so, you lock it to avoid other threads to change it. Second, you check again for the null, as in the tiny millisecond between check for null and locking could another thread get it.
Finally you create the instance and release the lock.

NEW QUESTION 16
You are developing an application that accepts the input of dates from the user.
Users enter the date in their local format. The date entered by the user is stored in a string variable named inputDate. The valid date value must be placed in a DateTime variable named validatedDate. You need to validate the entered date and convert it to Coordinated Universal Time (UTC). The code must not cause an exception to be thrown.
Which code segment should you use?

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

Answer: A

Explanation: AdjustToUniversal parses s and, if necessary, converts it to UTC.
Note: The DateTime.TryParse method converts the specified string representation of a date and time to its DateTime equivalent using the specified culture-specific format information and formatting style, and returns a value that indicates whether the conversion succeeded.

NEW QUESTION 17
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?

• A. Assembly.Load();
• B. Assembly.GetExecutingAssembly();
• C. This.GetType();
• D. Assembly.LoadFile("car.dll");

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

NEW QUESTION 18
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