70-483 Exam
Beginners Guide: exam 70 483
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Q61. - (Topic 1)
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?
A. var dataContainer = (IDataContainer)obj;
B. dynamic dataContainer = obj;
C. var dataContainer = obj is IDataContainer;
D. var dataContainer = obj as IDataContainer;
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. http://msdn.microsoft.com/en-us/library/cscsdfbt(v=vs.110).aspx
Q62. - (Topic 2)
You are developing a C# application. The application references and calls a RESTful web service named EmployeeService. The EmployeeService web service includes a method named GetEmployee, which accepts an employee ID as a parameter. The web service returns the following JSON data from the method.
{"Id":1,"Name":"David Jones">
The following code segment invokes the service and stores the result:
You need to convert the returned JSON data to an Employee object for use in the application.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: C
Q63. HOTSPOT - (Topic 1)
You are implementing a library method that accepts a character parameter and returns a string.
If the lookup succeeds, the method must return the corresponding string value. If the lookup fails, the method must return the value "invalid choice."
You need to implement the lookup algorithm.
How should you complete the relevant code? (To answer, select the correct keyword in each drop-down list in the answer area.)
Answer:
Q64. - (Topic 1)
You are developing an application that will transmit large amounts of data between a client computer and a server. You need to ensure the validity of the data by using a cryptographic hashing algorithm. Which algorithm should you use?
A. RSA
B. Aes
C. HMACSHA256
D. DES
Answer: C
Q65. - (Topic 2)
You are developing an application that will process personnel records.
The application must encrypt highly sensitive data.
You need to ensure that the application uses the strongest available encryption.
Which class should you use?
A. System.Security.Cryptography.DES
B. System.Security.Cryptography.Aes
C. System.Security.Cryptography.TripleDES
D. System.Security.Cryptography.RC2
Answer: B
Q66. - (Topic 2)
You develop an application by using C#. The application counts the number of times a specific word appears within a set of text files. The application includes the following code. (Line numbers are included for reference only.)
You have the following requirements:
. Populate the _wordCounts object with a list of words and the number of occurrences of each word. . Ensure that updates to the ConcurrentDictionary object can happen in parallel.
You need to complete the relevant code.
Which code segment should you insert at line 23?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: A
Q67. - (Topic 1)
You are developing an application that will transmit large amounts of data between a client computer and a server. You need to ensure the validity of the data by using a cryptographic hashing algorithm. Which algorithm should you use?
A. ECDsa
B. RNGCryptoServiceProvider
C. Rfc2898DeriveBytes
D. HMACSHA512
Answer: D
Q68. - (Topic 2)
You need to write a method that combines an unknown number of strings. The solution must minimize the amount of memory used by the method when the method executes.
What should you include in the code?
A. The String.Concat method
B. The StringBuilder.Append method
C. The + operator
D. The += operator
Answer: A
Explanation: A: String.Concat Method Concatenates one or more instances of String, or the String representations of the values of one or more instances of Object.
Q69. HOTSPOT - (Topic 2)
You have an existing order processing system that accepts .xml files,
The following code shows an example of a properly formatted order in XML:
You create the following class that will be serialized:
For each of the following properties, select Yes if the property is serialized according to the defined schema. Otherwise, select No.
Answer:
Q70. - (Topic 2)
You are troubleshooting an application that uses a class named FullName. The class is decorated with the DataContractAttribute attribute. The application includes the following code. (Line numbers are included for reference only.)
You need to ensure that the entire FullName object is serialized to the memory stream object.
Which code segment should you insert at line 09?
A. binary.WriteEndDocument();
B. binary.WriteEndDocumentAsync();
C. binary.WriteEndElementAsync();
D. binary.Flush();
Answer: A
Explanation: * DataContractSerializer.WriteEndObject Method (XmlDictionaryWriter) Writes the closing XML element using an XmlDictionaryWriter.
* Note on line 07: DataContractSerializer.WriteObject Method Writes all the object data (starting XML element, content, and closing element) to an XML document or stream.
XmlDictionaryWriter