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QUESTION 1
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?
A. Queue
B. SortedList
C. LinkedList
D. HashTable
E. Array
Correct Answer: A

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

QUESTION 2
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. 070-483
You need to create a LINQ query to meet the requirements.
Which code segment should you use?
070-483
A. Option A
B. Option B
C. Option C
D. Option D
Correct Answer: C

QUESTION 3
You are developing an application that includes the following code segment. (Line numbers are included for reference only.)
070-483
The GetAnimals() method must meet the following requirements:
Connect to a Microsoft SQL Server database.    070-483
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())
Correct Answer: BD

Explanation:
SqlConnection.Open – Opens a database connection with the property settings specified by the ConnectionString.

QUESTION 4
An application includes a class named Person. The Person class includes a method named GetData.
You need to ensure that the GetData() from the Person class.
Which access modifier should you use for the GetData() method?
A. Internal
B. Protected
C. Private
D. Protected internal
E. Public
Correct Answer: B

Explanation:
Protected – The type or member can be accessed only by code in the same class or structure, or in a class that is derived from that class.

QUESTION 5
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 TaskCompletionSource object and call the TrySetException() method of the object.
B. Create a task by calling the Task.ContinueWith() method.
C. Examine the Task.Status property immediately after the call to the Task.Run() method.
D. Create a task inside the existing Task.Run() method by using the AttachedToParent option.
Correct Answer: B

QUESTION 6
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?
A. var fs = File.Open(Filename, FileMode.OpenOrCreate, FileAccess.Read, FileShare.ReadWrite);
B. var fs = File.Open(Filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
C. var fs = File.Open(Filename, FileMode.OpenOrCreate, FileAccess.Read, FileShare.Write);
D. var fs = File.ReadAllLines(Filename);
E. 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 070-483 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.

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