Download Programming in C#.70-483.ActualTests.2019-02-06.181q.vcex

Vendor: Microsoft
Exam Code: 70-483
Exam Name: Programming in C#
Date: Feb 06, 2019
File Size: 18 MB
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Demo Questions

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? 
  1. Queue<T>
  2. SortedList
  3. LinkedList<T>
  4. HashTable
  5. 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
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. 
You need to create a LINQ query to meet the requirements. 
Which code segment should you use? 
  
  1. Option A
  2. Option B
  3. Option C
  4. Option D
Correct answer: C
Question 3
You are developing an application that uses the Microsoft ADO.NET Entity Framework to retrieve order information from a Microsoft SQL Server database. The application includes the following code. (Line numbers are included for reference only.) 
  
The application must meet the following requirements:
  • Return only orders that have an OrderDate value other than null. 
  • Return only orders that were placed in the year specified in the OrderDate property or in a later year. 
You need to ensure that the application meets the requirements. 
Which code segment should you insert at line 08?
  1. Where order.OrderDate.Value != null && order.OrderDate.Value.Year >= year
  2. Where order.OrderDate.Value == null && order.OrderDate.Value.Year == year
  3. Where order.OrderDate.HasValue && order.OrderDate.Value.Year == year
  4. Where order.OrderDate.Value.Year == year
Correct answer: A
Explanation:
* For the requirement to use an OrderDate value other than null use:OrderDate.Value != null  * For the requirement to use an OrderDate value for this year or a later year use:OrderDate.Value>= year
* For the requirement to use an OrderDate value other than null use:
OrderDate.Value != null 
* For the requirement to use an OrderDate value for this year or a later year use:
OrderDate.Value>= year
Question 4
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?
  1. var fs = File.Open(Filename, FileMode.OpenOrCreate, FileAccess.Read,FileShare.ReadWrite);
  2. var fs = File.Open(Filename, FileMode.Open, FileAccess.Read,FileShare.ReadWrite);
  3. var fs = File.Open(Filename, FileMode.OpenOrCreate, FileAccess.Read,FileShare.Write);
  4. var fs = File.ReadAllLines(Filename);
  5. 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
Question 5
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?
  1. Return ser.ConvertToType<Name>(json);
  2. Return ser.DeserializeObject(json);
  3. Return ser.Deserialize<Name>(json);
  4. Return (Name)ser.Serialize(json);
Correct answer: C
Explanation:
JavaScriptSerializer.Deserialize<T> - Converts the specified JSON string to an object of type T. References: http://msdn.microsoft.com/en-us/library/bb355316.aspx
JavaScriptSerializer.Deserialize<T> - Converts the specified JSON string to an object of type T. 
References: http://msdn.microsoft.com/en-us/library/bb355316.aspx
Question 6
You are developing an application. The application converts a Location object to a string by using a method named WriteObject. The WriteObject() method accepts two parameters, a Location object and an XmlObjectSerializer object. 
The application includes the following code. (Line numbers are included for reference only.) 
  
You need to serialize the Location object as a JSON object. 
Which code segment should you insert at line 20?
  1. New DataContractSerializer(typeof(Location))
  2. New XmlSerializer(typeof(Location))
  3. New NetDataContractSerializer()
  4. New DataContractJsonSerializer(typeof(Location))
Correct answer: D
Explanation:
The DataContractJsonSerializer class serializes objects to the JavaScript Object Notation (JSON) and deserializes JSON data to objects. Use the DataContractJsonSerializer class to serialize instances of a type into a JSON document and to deserialize a JSON document into an instance of a type.
The DataContractJsonSerializer class serializes objects to the JavaScript Object Notation (JSON) and deserializes JSON data to objects. 
Use the DataContractJsonSerializer class to serialize instances of a type into a JSON document and to deserialize a JSON document into an instance of a type.
Question 7
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?
  1. var dataContainer = (IDataContainer)obj;
  2. dynamic dataContainer = obj;
  3. var dataContainer = obj is IDataContainer;
  4. var dataContainer = obj as IDataContainer;
Correct 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. References: http://msdn.microsoft.com/en-us/library/cscsdfbt(v=vs.110).aspx
As - The as operator is like a cast operation. However, if the conversion isn't possible, as returns null instead of raising an exception. 
References: http://msdn.microsoft.com/en-us/library/cscsdfbt(v=vs.110).aspx
Question 8
You are creating an application that manages information about zoo animals. The application includes a class named Animal and a method named Save. 
The Save() method must be strongly typed. It must allow only types inherited from the Animal class that uses a constructor that accepts no parameters. 
You need to implement the Save() method. 
Which code segment should you use? 
  
  1. Option A
  2. Option B
  3. Option C
  4. Option D
Correct answer: C
Explanation:
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. References: http://msdn.microsoft.com/en-us/library/d5x73970.aspx
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. 
References: http://msdn.microsoft.com/en-us/library/d5x73970.aspx
Question 9
You are developing an application. The application includes classes named Employee and Person and an interface named IPerson. 
The Employee class must meet the following requirements:
  • It must either inherit from the Person class or implement the IPerson interface. 
  • It must be inheritable by other classes in the application. 
You need to ensure that the Employee class meets the requirements. 
Which two code segments can you use to achieve this goal? (Each correct answer presents a complete solution. Choose two.) 
  
  1. Option A
  2. Option B
  3. Option C
  4. Option D
Correct answer: BD
Explanation:
Sealed - When applied to a class, the sealed modifier prevents other classes from inheriting from it. References: http://msdn.microsoft.com/en-us/library/88c54tsw(v=vs.110).aspx
Sealed - When applied to a class, the sealed modifier prevents other classes from inheriting from it. 
References: http://msdn.microsoft.com/en-us/library/88c54tsw(v=vs.110).aspx
Question 10
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?
  1. ReRegisterForFinalize()
  2. SuppressFinalize()
  3. Collect()
  4. WaitForFullGCApproach()
Correct answer: B
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