[Updated 2018] 70-483 Dumps - Microsoft Programming in C# Exam Questions.pdf

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Microsoft 70-483 Exam Programming in C#

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Version: 13.0 Queston: 1 You are are develop developing ing an applica applicaon on that that includ includes es a class class named named Order Order.. The The applic applicao aon n will stor store e a collecon of Order objects. The collecon must meet the following requirements: Use strongly typed members. Process Order objects in rst-in-rst-out rst-in-rst-out order. order. Store values for each Order object. Use zero-based indices. You need to use a collecon type that meets the requirements. Which collecon type should you use? A. Queue B. SortedList C. LinkedList LinkedList D. HashTable E. Array

Answer: A Explanaon: Queues Queues are are useful useful for for stori storing ng messages messages in the order order they they were were receive received d for for sequen sequenal al proce processi ssing. ng. Objects stored in a Queue are inserted at one end and removed from the other. Reference: hp://msdn.microso.com/en-us/library/7977ey2c.aspx

Queston: 2 You are developing an applicaon. The applicaon calls a method that returns an array of integers named employeeIds. You dene an integer variable named employeeIdToRemove and assign a value to it. You declare an array named lteredEmployeeIds. 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?



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A. Opon A B. Opon B C. Opon C D. Opon D

Answer: C The Disnct keyword avoids duplicates duplicates,, and OrderByDes OrderByDescendin cending g provides provides the proper proper ordering ordering from from highest to lowest.

Queston: 3 You are developing an applicaon that includes the following code segment. (Line numbers are included for reference only.)

The GetAnimals() method must meet the following requirements: Connect to a Microso SQL Server database.



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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 acons should you perform? (Each correct answer presents part of the soluon. Choose two.) A. Insert the following code segment at line 16: while(sqlDataReader.NextResult()) B. Insert the following code segment at line 13: sqlConnecon.Open(); C. Insert the following code segment at line 13: sqlConnecon.BeginTransacon(); D. Insert the following code segment at line 16: while(sqlDataReader.Read()) E. Insert the following code segment at line 16: while(sqlDataReader.GetValues())

Answer: B, D Explanaon: B: SqlConnecon.Open - Opens a database connecon with the property sengs specied by the ConneconString. Reference: hp://msdn.microso.com/en-us/library/system.dat hp://msdn.microso.com/en-u s/library/system.data.sqlclient.sqlconnecon.open.aspx a.sqlclient.sqlconnecon.open.aspx D: SqlDataReader.Read SqlDataReader.Read - Advances the SqlDataReader to the next record. Reference: hp://msdn.microso.com/en-us/library/system.dat hp://msdn.microso.com/en-u s/library/system.data.sqlclient.sqldatareader a.sqlclient.sqldatareader.read.aspx .read.aspx

Queston: 4 DRAG DROP You are developing a custom collecon named LoanCollecon for a class named Loan class. You need to ensure that you can process each Loan object in the LoanCollecon collecon by using a foreach loop. How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locaons in the answer are a. 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.)



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Answer:



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Queston: 5 You are developing an applicaon that uses the Microso ADO.NET Enty Framework to retrieve order informaon from a Microso SQL Server database. The applicaon includes the following code. (Line numbers are included for reference only.)



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The applicaon 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 specied in the OrderDate property or in a later year. You need to ensure that the applicaon meets the requirements. Which code segment should you insert at line 08? A. Where order.OrderDate.Value != null && order.OrderDate.Value.Year > = year B. Where order.OrderDate.Value = = null && order.OrderDate.Value.Year = = year C. Where order.OrderDate.HasValue && order.OrderDate.Value.Year = = year D. Where order.OrderDate.Value.Year = = year

Answer: A *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

Queston: 6 DRAG DROP You are developing an applicaon by using C#. The applicaon includes an array of decimal values named loanAmounts. You are developing a LINQ query to return the values from the array. The query must return decimal values that are evenly divisible by two. The values must be sorted from the lowest value to the highest value. You need to ensure that the query correctly returns the decimal values. How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locaons in the answer are a. 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.)



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Answer: Box 1: from Box 2: where Box 3: orderby Box 4: ascending Box 5: select Note: In a query expression, the orderby clause causes the returned sequence or subsequence (group) to be sorted in either ascending or descending order. Examples: // Query for ascending sort. IEnumerable sortAscendingQuery = from fruit in fruits orderby fruit //"ascending" is default select fruit; // Query for descending sort. IEnumerable sortDescendingQuery = from w in fruits orderby w descending select w;

Queston: 7 You are developing an applicaon. The applicaon includes a method named ReadFile that reads data from a le. The ReadFile() method must meet the following requirements: It must not make changes to the data le. It must allow other processes to access the data le. It must not throw an excepon if the applicaon aempts to open a data le 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,



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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);

Answer: A Explanaon: FileMode.OpenOrCreate - Species that the operang system should open a le if it exists; otherwise, a new le should should be created. If the le is opened with FileAccess.Read, FileAccess.Read, FileIOPermission FileIOPermissionAccess Access.Read .Read permission is required. If the le access is FileAccess.Write, FileIOPermissionAccess.Write permission is requir required. ed. If the le is opened opened with FileAcc FileAccess. ess.Rea ReadW dWrit rite, e, both both FileIOP FileIOPermi ermissi ssionA onAcce ccess. ss.Rea Read d and FileIOPermissionAccess.Write permissions are required. hp://msdn.microso.com/en-us/library/system.io.lemode.aspx FileShare.ReadWrite - Allows subsequent opening of the le for reading or wring.If this ag is not specied, any request to open the le for reading or wring (by this process or another process) will fail unl the le is closed.However, even if this ag is specied, addional permissions might sll be needed to access the le. hp://msdn.microso.com/pl-pl/library/system.io.leshare.aspx

Queston: 8 An applicaon receives JSON data in the following format:

The applicaon 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.ConvertToType(json); B. Return ser.DeserializeObject(json); ser.DeserializeObject(json); C. Return ser.Deserialize(json); ser.Deserialize(json);



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D. Return (Name)ser (Name )ser.Serialize(json); .Serialize(json);

Answer: C Explanaon: JavaScriptSerializer.Deserialize - Converts the specied JSON string to an object of type T. hp://msdn.microso.com/en-us/library/bb355316.aspx

Queston: 9 DRAG DROP An applic applicaon aon serializes serializes and deserializ deserializes es XML from from strea streams. ms. The The XML strea streams ms are in the follow following ing format:

The applicaon reads the XML streams by using a DataContractSerializer object that is declared by the following code segment: var ser = new DataContractSerializer(typeof(Name)); You need to ensure that the applicaon preserves the element ordering as provided in the XML stream. How should you complete the relevant code? (To answer, drag the appropriate aributes to the correct locaons in the answer area-Each aribute 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.)



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Answer:



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Explanaon: Target arget 1: The DataCo DataContr ntract actA Arib ribute ute.Na .Namesp mespace ace Prope Property rty gets or sets the namesp namespace ace for for the data data contract for the type. Use this property to specify a parcular namespace if your type must return data that complies with a specic data contract. Target2, target3: We put Order=10 on FirstName to ensure that LastName is ordered rst. Note: The basic rules for data ordering include: * If a data contract type is a part of an inheritance hierarchy, data members of its base types are always rst in the order. * Next Next in order order are the current current type’s type’s data data members members that do not have have the Order Order prope property rty of the DataMemberAribute aribute set, in alphabecal order. order. * Next are any data members that have the Order property of the DataMemberAribute aribute set. These are ordered by the value of the Order property rst and then alphabecally if there is more than one member of a certain Order value. Order values may be skipped. Reference: Data Member Order hps://msdn.microso.com/en-us/library/ms729813(v=vs.110).aspx Reference: DataContractAribute.Namespace DataContractAribute.Namespace Property hps://msdn.microso.com/enus/library/system.runme.serializaon.datacontract us/library/system.runme.serializaon.datacontractaribute.namespace(v=vs.110).aspx aribute.namespace(v=vs.110).aspx



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Queston: 10 You are developing an applicaon. The applicaon converts a Locaon object to a string by using a method named WriteObject. WriteObject. The WriteObject( WriteObject()) method accepts accepts two parameters parameters,, a Locaon Locaon object and an XmlObjectSerializer object. The applicaon includes the following code. (Line numbers are included for reference only.)

You need to serialize the Locaon object as a JSON object. Which code segment should you insert at line 20? A. New DataContractSerializer(typeof(Locaon)) B. New XmlSerializer(typeof(Locaon)) C. New NetDataContractSenalizer() D. New DataContractJsonSerializer(typeof(Locaon)) DataContractJsonSerializer(typeof(Locaon))

Answer: D Explanaon: The code is using [DataContract] aribute here so need to use DataContractSerializer class. The DataContract DataContractJsonS JsonSerializ erializer er class serializes serializes objects objects to the JavaScrip JavaScriptt Object Notaon Notaon (JSON) (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.

Queston: 11 An applicaon 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 modier should you use for the GetData() method?



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A. Internal B. Protected C. Private D. Protected internal E. Public

Answer: B Explanaon: 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. The protected keyword is a member access modier. A protected member is accessible within its class and by derived class instances. Reference: hp://msdn.microso.com/en-us/library/ms173121.aspx

Queston: 12 You are developing an applicaon by using C#. The applicaon includes the following code segment. (Line numbers are included for reference only.)

The The DoW DoWork( ork()) metho method d must must not not thro throw w any any exce excep pon onss when when con converng verng the the obj obj objec objectt to the 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 Explanaon: As - The as operator is like a cast operaon. However, if the conversion isn't possible, as returns null instead of raising an excepon. hp://msdn.microso.com/en-us/library/cscsdt(v=vs.110).aspx



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Queston: 13 You are creang an applicaon that manages informaon about zoo animals. The applicaon 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?


Answer: C Explanaon: The condion new() ensures the empty/default constructor and must be the last condion. When you dene a generic class, you can apply restricons to the kinds of types that client code can use for type arguments when it instanates your class. If client code tries to instanate your class by using a type that is not allowed by a constraint, the result is a compile-me error. These restricons are called constraints. Constraints are specied by using the where contextual keyword. hp://msdn.microso.com/en-us/library/d5x73970.aspx

Queston: 14 DRAG DROP You are developing a class named ExtensionMethods. You need to ensure that the ExtensionMethods class implements the IsEmail() method on string objects.



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How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locaons in the answer are a. 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:



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Explanaon: Extensions must be in a stac class as it kind of a shared source of extension methods. You do not instanate the class. The key word “this” is simply a syntax how you tell the compiler, that your method IsUrl is extension for the String object

Queston: 15 You are developing an applicaon. The applicaon 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 applicaon. 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 soluon. Choose two.)



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Answer: B, D Explanaon: Sealed - When applied to a class, the sealed modier prevents other classes from inhering from it. Reference: hp://msdn.microso.com/en-us/library/88c54tsw(v=vs.110).aspx

Queston: 16 You are developing an applicaon that will convert data into mulple output formats. The applicaon includes the following code. (Line numbers are included for reference only.)

You are are develop developing ing a code code segment segment that that will produ produce ce tab-d tab-delim elimited ited outpu output. t. All output output roun rounes es implement the following interface:



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You need to minimize the compleon me of the GetOutput() method. Which code segment should you insert at line 06?


Answer: B Explanaon: A String object concatenaon operaon always creates a new object from the exisng string and the new data. A StringBuilder object maintains a buer to accommodate the concatenaon of new data. New data is appended to the buer if room is available; otherwise, a new, larger buer is allocated, data from the original buer is copied to the new buer, and the new data is then appended to the new buer. The The perfo performa rmance nce of a concat concatena enaon on opera operaon on for for a String String or StringB StringBuil uilder der object object depend dependss on the frequency of memory allocaons. A String concatenaon operaon always allocates memory, whereas a



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StringBuilder concatenaon operaon allocates memory only if the StringBuilder object buer is too small to accommodate the new data. Use the String class if you are concatenang a xed number of String objects. objects. In that case, the compiler may even combine individual individual concatenaon concatenaon operaons operaons into a single operaon. Use a StringBuilder object if you are concatenang an arbitrary number of strings; for example, if you're using a loop to concatenate a random number of strings of user input. hp://msdn.microso.com/en-us/library/system. hp://msdn.microso.com/en-u s/library/system.text.stringbuilder(v=vs.110).asp text.stringbuilder(v=vs.110).aspxx

Queston: 17 You are developing an applicaon by using C#. The applicaon includes an object that performs a long running process. You need to ensure that the garbage collector does not release release the object's resources resources unl the process process completes. Which garbage collector method should you use? A. ReRegisterForFinalize() B. SuppressFinalize() C. Collect() D. WaitForFullGCApproach() WaitForFullGCApproach()

Answer: B You can use the SuppressF SuppressFinaliz inalize e method method in a resource resource class to prevent prevent a redundan redundantt garbage garbage collecon collecon from being called. Reference: GC.SuppressFinalize Method (Object) hps://msdn.microso.com/en-us/library/system.gc.suppr hps://msdn.microso.com/ en-us/library/system.gc.suppressnalize(v=vs.110).aspx essnalize(v=vs.110).aspx

Queston: 18 You are creang a class named Employee. The class exposes a string property named EmployeeType. The following code segment denes the Employee class. (Line numbers are included for reference only.)

The EmployeeType property value must be accessed and modied only by code within the Employee class or within a class derived from the Employee class. You need to ensure that the implementaon of the EmployeeType property meets the requirements. Which two acons should you perform? (Each correct answer represents part of the complete soluon. Choose two.) A. Replace line 05 with the following code segment: protected get;



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

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

Queston: 19 You are implemenng 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 applicaon does not throw excepons on invalid conversions. Which code segment should you insert at line 04? A. int balance = (int) (oat)amountRef; B. int balance = (int)amountRef; C. int balance = amountRef; D. int balance = (int) (double) amountRef;

Answer: A Explicit cast of object into oat, and then another Explicit cast of oat into int. Reference: explicit (C# Reference) hps://msdn.microso.com/en-us/library/xhbhezf4.aspx

Queston: 20 You are creang a console applicaon by using C#.



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You need to access the applicaon assembly. Which code segment should you use? A. Assembly. A ssembly.GetAssembly(this); GetAssembly(this); B. this.GetType(); this.GetType(); C. Assembly.Load A ssembly.Load(); (); D. Assembly.GetExecungAssembly();

Answer: D Explanaon: Assembly.GetExecungAssembly - Gets the assembly that contains the code that is currently execung. Reference: hp://msdn.microso.com/enus/library/system.reecon.assembly.getexecungassembly(v=vs.110).aspx Incorrect: Not A: Assembl Assembly y.GetAs .GetAssemb sembly ly - Gets Gets the curren currently tly loaded loaded assemb assembly ly in which which the speci specied ed class class is dened. hp://msdn.microso.com/en-us/library/system.reecon.assembly hp://msdn.microso.com/en-u s/library/system.reecon.assembly.getassembly.asp .getassembly.aspxx




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