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Q31. - (Topic 1) 

You are developing an application that will convert data into multiple output formats. 

The application includes the following code. (Line numbers are included for reference only.) 

You are developing a code segment that will produce tab-delimited output. All output routines implement the following interface: 

You need to minimize the completion time of the GetOutput() method. Which code segment should you insert at line 06? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Explanation: 

A String object concatenation operation always creates a new object from the existing string and the new data. A StringBuilder object maintains a buffer to accommodate the concatenation of new data. New data is appended to the buffer if room is available; otherwise, a new, larger buffer is allocated, data from the original buffer is copied to the new buffer, and the new data is then appended to the new buffer. The performance of a concatenation operation for a String or StringBuilder object depends on the frequency of memory allocations. A String concatenation operation always allocates memory, whereas a StringBuilder concatenation operation allocates memory only if the StringBuilder object buffer is too small to accommodate the new data. Use the String class if you are concatenating a fixed number of String objects. In that case, the compiler may even combine individual concatenation operations into a single operation. Use a StringBuilder object if you are concatenating an arbitrary number of strings; for example, if you're using a loop to concatenate a random number of strings of user input. 

http://msdn.microsoft.com/en-us/library/system.text.stringbuilder(v=vs.110).aspx 


Q32. HOTSPOT - (Topic 2) 

You are building a data access layer in an application that contains the following code: 

For each of the following statements, select Yes if the statement is true. Otherwise, select No. 

Answer: 


Q33. - (Topic 2) 

You need to create a method that can be called by using a varying number of parameters. 

What should you use? 

A. Method overloading 

B. Interface 

C. Named parameters 

D. Lambda expressions 

Answer:

Explanation: 

Member overloading means creating two or more members on the same type that differ only in the number or type of parameters but have the same name. Overloading is one of the most important techniques for improving usability, productivity, and readability of reusable libraries. Overloading on the number of parameters makes it possible to provide simpler versions of constructors and methods. Overloading on the parameter type makes it possible to use the same member name for members performing identical operations on a selected set of different types. 


Q34. - (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. HMACSHA2S6 

C. Aes 

D. RNGCryptoServiceProvider 

Answer:


Q35. - (Topic 2) 

You have an application that accesses a Web server named Server1. 

You need to download an image named Imagel.jpg from Server1 and store the image locally as Filel.jpg. 

Which code should you use? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:


Q36. DRAG DROP - (Topic 2) 

You are creating a class named Data that includes a dictionary object named _data. 

You need to allow the garbage collection process to collect the references of the _data object. 

You have the following code: 

Which code segments should you include in Target 1 and Target 2 to complete the code? (To answer, drag the appropriate code segments to the correct locations in the answer area. 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: 


Q37. - (Topic 2) 

You are developing an application that will parse a large amount of text. 

You need to parse the text into separate lines and minimize memory use while processing data. 

Which object type should you use? 

A. DataContractSerializer 

B. StringBuilder 

C. StringReader 

D. JsonSerializer 

Answer:


Q38. - (Topic 1) 

You are developing an application that includes a class named UserTracker. The application includes the following code segment. (Line numbers are included for reference only.) 

You need to add a user to the UserTracker instance. What should you do? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:


Q39. - (Topic 2) 

You are developing an application for a bank. The application includes a method named ProcessLoan that processes loan applications. The ProcessLoan() method uses a method named CalculateInterest. The application includes the following code: 

You need to declare a delegate to support the ProcessLoan() method. Which code segment should you use? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:


Q40. DRAG DROP - (Topic 1) 

You are developing a class named Temperature. 

You need to ensure that collections of Temperature objects are sortable. 

How should you complete the relevant code segment? (To answer, drag the appropriate code segments to the correct locations in the answer area. 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: