70-483 | Actual 70-483 Exam Questions and Answers 2021

NEW QUESTION 1
You are implementing a method named GetValidPhoneNumbers. The GetValidPhoneNumbers() method processes a list of string values that represent phone numbers.
The GetValidPhoneNumbers() method must return only phone numbers that are in a valid format. You need to implement the GetValidPhoneNumbers() method.
Which two code segments can you use to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

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

Answer: AB

Explanation: * Regex.Matches
Searches an input string for all occurrences of a regular expression and returns all the matches.
* MatchCollection
Represents the set of successful matches found by iteratively applying a regular expression pattern to the input string.
The collection is immutable (read-only) and has no public constructor. The Regex.Matches method returns a MatchCollection object.
* List<T>.Add Method
Adds an object to the end of the List<T>.

NEW QUESTION 2
You are developing an application for a bank. The application includes a method named ProcessLoan that processes loan applications. The ProcessLoan() method uses a method named CalculateInterest. The application includes the following code:

You need to declare a delegate to support the ProcessLoan() method. Which code segment should you use?

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

Answer: C

NEW QUESTION 3
You are creating a class named Employee. The class exposes a string property named EmployeeType. The following code segment defines the Employee class. (Line numbers are included for reference only.)

The EmployeeType property value must be accessed and modified only by code within the Employee class or within a class derived from the Employee class.
You need to ensure that the implementation of the EmployeeType property meets the requirements. Which two actions should you perform? (Each correct answer represents part of the complete solution. Choose two.)

• A. Replace line 05 with the following code segment: protected get;
• B. Replace line 06 with the following code segment: private set;
• C. Replace line 03 with the following code segment: public string EmployeeType
• D. Replace line 05 with the following code segment: private get;
• E. Replace line 03 with the following code segment: protected string EmployeeType
• F. Replace line 06 with the following code segment: protected set;

Answer: BE

Explanation: protected string EmpType { get; private set;}
This is a quite common way to work with properties within base classes. Incorrect:
Not D: Cannot be used because of the internal keyword on line 03.

NEW QUESTION 4
You have the following code. (Line numbers are included for reference only).

You need to complete the WriteTextAsync method. The solution must ensure that the code is not blocked while the file is being written.
Which code should you insert at line 12?

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

Answer: D

Explanation: await sourceStream.WriteAsync(encodedText, 0, encodedText.Length);
The following example has the statement await sourceStream.WriteAsync(encodedText, 0, encodedText.Length);, which is a contraction of the following two statements:
Task theTask = sourceStream.WriteAsync(encodedText, 0, encodedText.Length); await theTask;
Example: The following example writes text to a file. At each await statement, the method
immediately exits. When the file I/O is complete, the method resumes at the statement that follows the await statement. Note that the async modifier is in the definition of methods that use the await statement.
public async void ProcessWrite()
{
string filePath = @"temp2.txt"; string text = "Hello Worldrn"; await WriteTextAsync(filePath, text);
}
private async Task WriteTextAsync(string filePath, string text)
{
byte[] encodedText = Encoding.Unicode.GetBytes(text); using (FileStream sourceStream = new FileStream(filePath, FileMode.Append, FileAccess.Write, FileShare.None, bufferSize: 4096, useAsync: true))
{
await sourceStream.WriteAsync(encodedText, 0, encodedText.Length);
};
}
Reference: Using Async for File Access (C# and Visual Basic) https://msdn.microsoft.com/en-us/library/jj155757.aspx

NEW QUESTION 5
HOTSPOT
You are reviewing the following code:

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

Answer:

Explanation: 1) Yes, because Group is enum with FlagAttribute
2) Yes, because only Administrator = 8 and 8 == 8 is true
3) Yes, becaues only Supervisor = 2 and 2 < 8 is true

NEW QUESTION 6
You need to write a console application that meets the following requirements:
If the application is compiled in Debug mode, the console output must display Entering debug mode. If the application is compiled in Release mode, the console output must display Entering release mode.
Which code should you use?

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

Answer: D

Explanation: * Programmatically detecting Release/Debug mode (.NET) Boolean isDebugMode = false;
#if DEBUG
isDebugMode = true;
* #elif
#elif lets you create a compound conditional directive. Example:
#define VC7
//…
#if debug Console.Writeline(“Debug build”);
#elif VC7
Console.Writeline(“Visual Studio 7”);
#endif
Reference: http://stackoverflow.com/questions/654450/programmatically-detecting-release-debugmode- net

NEW QUESTION 7
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.
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:

NEW QUESTION 8
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 9
DRAG DROP
You have the following class:

You need to implement IEquatable. The Equals method must return true if both ID and Name are set to the identical values. Otherwise, the method must return false. Equals must not throw an exception.
What should you do? (Develop the solution by selecting and ordering the required code snippets. You may not need all of the code snippets.)

Answer:

Explanation: In Box 3 we must use Name.Equals, not Object.Equals, to properly compare two strings. Incorrect:
Not Box 3: Object.Equals (obj, obj) compares the REFERENCE (true if they point to same object). Two strings, even having the same value will never have the same reference. So it is not applicable here.

NEW QUESTION 10
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. 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 11
HOTSPOT
You have the following code (line numbers are included for reference only):

To answer, complete each statement according to the information presented in the code.

Answer:

Explanation:

NEW QUESTION 12
DRAG DROP
You have a class named Customer and a class named Order.
The customer class has a property named Orders that contains a list of Order objects. The Order class has a property named OrderDate that contains the date of the Order.
You need to create a LINQ query that returns all of the customers who had at least one order during the year 2005.
You write the following code.

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.

Answer:

Explanation: Target 1 : Where
Target 2 : Join
Target 3 : =>
Target 4 : ==

NEW QUESTION 13
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?

• A. Return ser.Desenalize (json, typeof(Name));
• B. Return ser.ConvertToType<Name>(json);
• C. Return ser.Deserialize<Name>(json);
• D. Return ser.ConvertToType (json, typeof (Name));

Answer: C

Explanation: JavaScriptSerializer.Deserialize<T> - Converts the specified JSON string to an object of type T. http://msdn.microsoft.com/en-us/library/bb355316.aspx

NEW QUESTION 14
You are developing an application that uses multiple asynchronous tasks to optimize performance. The application will be deployed in a distributed environment.
You need to retrieve the result of an asynchronous task that retrieves data from a web service. The data will later be parsed by a separate task.
Which code segment should you use?

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

Answer: B

Explanation: Example:
// Signature specifies Task<TResult>
async Task<int> TaskOfTResult_MethodAsync()
{
int hours;
// . . .
// Return statement specifies an integer result. return hours;
}
// Calls to TaskOfTResult_MethodAsync
Task<int> returnedTaskTResult = TaskOfTResult_MethodAsync(); int intResult = await returnedTaskTResult;
// or, in a single statement
int intResult = await TaskOfTResult_MethodAsync();
// Signature specifies Task
async Task Task_MethodAsync()
{
// . . .
// The method has no return statement.
}
// Calls to Task_MethodAsync
Task returnedTask = Task_MethodAsync(); await returnedTask;
// or, in a single statement await Task_MethodAsync();
Reference: Asynchronous Programming with Async and Await (C# and Visual Basic) https://msdn.microsoft.com/en-us/library/hh191443.aspx

NEW QUESTION 15
You need to store the values in a collection.
The solution must meet the following requirements:
The values must be stored in the order that they were added to the collection. The values must be accessed in a first-in, first-out order.
Which type of collection should you use?

• A. SortedList
• B. Queue
• C. ArrayList
• D. Hashtable

Answer: B

Explanation: The Queue class implements a queue as a circular array. Objects stored in a Queue are inserted at one end and removed from the other.
Queues and stacks are useful when you need temporary storage for information; that is, when you might want to discard an element after retrieving its value. Use Queue if you need to access the information in the same order that it is stored in the collection.
Reference: https://msdn.microsoft.com/en-us/library/system.collections.queue(v=vs.110).aspx

NEW QUESTION 16
You are implementing a method named Calculate that performs conversions between value types and reference types. The following code segment implements the method. (Line numbers are included for reference only.)

You need to ensure that the application does not throw exceptions on invalid conversions. Which code segment should you insert at line 04?

• A. int balance = (int) (float)amountRef;
• B. int balance = (int)amountRef;
• C. int balance = amountRef;
• D. int balance = (int) (double) amountRef;

Answer: A

Explanation: Explicit cast of object into float, and then another Explicit cast of float into int. Reference: explicit (C# Reference)
https://msdn.microsoft.com/en-us/library/xhbhezf4.aspx