70-483: Programming in C# - Free download from Exam Hub

You are developing an application that includes a class named Order. The application will store a collection of Order objects.

The collection must meet the following requirements:

Use strongly typed members.
Process Order objects in first-in-first-out order.
Store values for each Order object.
Use zero-based indices.

You need to use a collection type that meets the requirements.

Which collection type should you use?

Queue<T>
SortedList
LinkedList<T>
HashTable
Array<T>

Correct answer: A

Explanation:

Queues are useful for storing messages in the order they were received for sequential processing. Objects stored in a Queue<T> are inserted at one end and removed from the other. References: http://msdn.microsoft.com/en-us/library/7977ey2c.aspx

Queues are useful for storing messages in the order they were received for sequential processing. Objects stored in a Queue<T> are inserted at one end and removed from the other.

References: http://msdn.microsoft.com/en-us/library/7977ey2c.aspx

You are developing an application. The application calls a method that returns an array of integers named employeeIds. You define an integer variable named employeeIdToRemove and assign a value to it. You declare an array named filteredEmployeeIds.

You have the following requirements:

Remove duplicate integers from the employeeIds array.
Sort the array in order from the highest value to the lowest value.
Remove the integer value stored in the employeeIdToRemove variable from the employeeIds array.

You need to create a LINQ query to meet the requirements.

Which code segment should you use?

Option A
Option B
Option C
Option D

Correct answer: C

You are developing an application. The application includes a method named ReadFile that reads data from a file.

The ReadFile() method must meet the following requirements:

It must not make changes to the data file.
It must allow other processes to access the data file.
It must not throw an exception if the application attempts to open a data file that does not exist.

You need to implement the ReadFile() method.

Which code segment should you use?

var fs = File.Open(Filename, FileMode.OpenOrCreate, FileAccess.Read,FileShare.ReadWrite);
var fs = File.Open(Filename, FileMode.Open, FileAccess.Read,FileShare.ReadWrite);
var fs = File.Open(Filename, FileMode.OpenOrCreate, FileAccess.Read,FileShare.Write);
var fs = File.ReadAllLines(Filename);
var fs = File.ReadAllBytes(Filename);

Correct answer: A

Explanation:

FileMode.OpenOrCreate - Specifies that the operating system should open a file if it exists; otherwise, a new file should be created. If the file is opened with FileAccess.Read, FileIOPermissionAccess.Read permission is required. If the file access is FileAccess.Write, FileIOPermissionAccess.Write permission is required. If the file is opened with FileAccess.ReadWrite, both FileIOPermissionAccess.Read and FileIOPermissionAccess.Write permissions are required. FileShare.ReadWrite - Allows subsequent opening of the file for reading or writing. If this flag is not specified, any request to open the file for reading or writing (by this process or another process) will fail until the file is closed. However, even if this flag is specified, additional permissions might still be needed to access the file. References: http://msdn.microsoft.com/pl-pl/library/system.io.fileshare.aspxhttp://msdn.microsoft.com/en-us/library/system.io.filemode.aspx

FileMode.OpenOrCreate - Specifies that the operating system should open a file if it exists; otherwise, a new file should be created. If the file is opened with FileAccess.Read, FileIOPermissionAccess.Read permission is required. If the file access is FileAccess.Write, FileIOPermissionAccess.Write permission is required. If the file is opened with FileAccess.ReadWrite, both FileIOPermissionAccess.Read and FileIOPermissionAccess.Write permissions are required.

FileShare.ReadWrite - Allows subsequent opening of the file for reading or writing. If this flag is not specified, any request to open the file for reading or writing (by this process or another process) will fail until the file is closed. However, even if this flag is specified, additional permissions might still be needed to access the file.

References:

http://msdn.microsoft.com/pl-pl/library/system.io.fileshare.aspx

http://msdn.microsoft.com/en-us/library/system.io.filemode.aspx

Vendor:	Microsoft
Exam Code:	70-483
Exam Name:	Programming in C#
Date:	Sep 20, 2019
File Size:	19 MB

Download Programming in C.70-483.Pass4Sure.2019-09-20.169q.tqb

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