19 November, 2019
Programming In C# 70-483 Rapidshare
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Question 1
HOTSPOT
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 dropdown list in the answer area.)
Solution:
switch(letter){ case ‘a’:
case ‘m’: default:
}
Reference: switch (C# Reference)
http://msdn.microsoft.com/en-us/library/06tc147t(v=vs.110).aspx
Does this meet the goal?
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 dropdown list in the answer area.)
Solution:
switch(letter){ case ‘a’:
case ‘m’: default:
}
Reference: switch (C# Reference)
http://msdn.microsoft.com/en-us/library/06tc147t(v=vs.110).aspx
Does this meet the goal?
Question 2
You have a C# application.
The application requires 500 MB of available memory.
You need to identify whether there is enough available memory when the application starts. Which class should you use?
The application requires 500 MB of available memory.
You need to identify whether there is enough available memory when the application starts. Which class should you use?
Question 3
You have a collection of Product objects named products. Each Product has a category. You need to determine the longest name for each category.
You write the following code.
Which keyword should you use for Target 1?
You write the following code.
Which keyword should you use for Target 1?
Question 4
You are developing a C# application named Application1 by using Microsoft Visual Studio 2017. You plan to compare the memory usage between different builds of Application1.
You need to record the memory usage of each build. What should you use from Visual Studio?
You need to record the memory usage of each build. What should you use from Visual Studio?
Question 5
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?
Question 6
You are debugging an application that calculates loan interest. The application includes the following code. (Line numbers are included for reference only.)
You have the following requirements:
The debugger must break execution within the Calculatelnterest() method when the loanAmount variable is less than or equal to zero.
The release version of the code must not be impacted by any changes. You need to meet the requirements.
What should you do?
You have the following requirements:
The debugger must break execution within the Calculatelnterest() method when the loanAmount variable is less than or equal to zero.
The release version of the code must not be impacted by any changes. You need to meet the requirements.
What should you do?
Question 7
DRAG DROP
You are developing an application that implements a set of custom exception types. You declare the custom exception types by using the following code segments:
The application includes a function named DoWork that throws .NET Framework exceptions and custom exceptions. The application contains only the following logging methods:
The application must meet the following requirements:
When ContosoValidationException exceptions are caught, log the information by using the static void Log (ContosoValidationException ex) method.
When ContosoDbException or other ContosoException exceptions are caught, log the information by using the static void Log(ContosoException ex) method.
You need to meet the requirements.
How should you complete the relevant 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.)
Solution:
Catch the most specific exception first.
Does this meet the goal?
You are developing an application that implements a set of custom exception types. You declare the custom exception types by using the following code segments:
The application includes a function named DoWork that throws .NET Framework exceptions and custom exceptions. The application contains only the following logging methods:
The application must meet the following requirements:
When ContosoValidationException exceptions are caught, log the information by using the static void Log (ContosoValidationException ex) method.
When ContosoDbException or other ContosoException exceptions are caught, log the information by using the static void Log(ContosoException ex) method.
You need to meet the requirements.
How should you complete the relevant 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.)
Solution:
Catch the most specific exception first.
Does this meet the goal?
Question 8
DRAG DROP
An application serializes and deserializes XML from streams. The XML streams are in the following format:
The application 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 application preserves the element ordering as provided in the XML stream.
How should you complete the relevant code? (To answer, drag the appropriate attributes to the correct locations in the answer area-Each attribute 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.)
Solution:
Target 1: The DataContractAttribute.Namespace Property gets or sets the namespace for the data contract for the type. Use this property to specify a particular namespace if your type must return data that complies with a specific data contract.
Target2, target3: We put Order=10 on FirstName to ensure that LastName is ordered first. 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 first in the order.
* Next in order are the current type’s data members that do not have the Order property of the DataMemberAttribute attribute set, in alphabetical order.
* Next are any data members that have the Order property of the DataMemberAttribute attribute set. These are ordered by the value of the Order property first and then alphabetically if there is more than one member of a certain Order value. Order values may be skipped.
Reference: Data Member Order
https://msdn.microsoft.com/en-us/library/ms729813(v=vs.110).aspx Reference: DataContractAttribute.Namespace Property https://msdn.microsoft.com/enus/
library/system.runtime.serialization.datacontractattribute.namespace(v=vs.110).aspx
Does this meet the goal?
An application serializes and deserializes XML from streams. The XML streams are in the following format:
The application 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 application preserves the element ordering as provided in the XML stream.
How should you complete the relevant code? (To answer, drag the appropriate attributes to the correct locations in the answer area-Each attribute 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.)
Solution:
Target 1: The DataContractAttribute.Namespace Property gets or sets the namespace for the data contract for the type. Use this property to specify a particular namespace if your type must return data that complies with a specific data contract.
Target2, target3: We put Order=10 on FirstName to ensure that LastName is ordered first. 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 first in the order.
* Next in order are the current type’s data members that do not have the Order property of the DataMemberAttribute attribute set, in alphabetical order.
* Next are any data members that have the Order property of the DataMemberAttribute attribute set. These are ordered by the value of the Order property first and then alphabetically if there is more than one member of a certain Order value. Order values may be skipped.
Reference: Data Member Order
https://msdn.microsoft.com/en-us/library/ms729813(v=vs.110).aspx Reference: DataContractAttribute.Namespace Property https://msdn.microsoft.com/enus/
library/system.runtime.serialization.datacontractattribute.namespace(v=vs.110).aspx
Does this meet the goal?
Question 9
You are creating a console application named Appl.
App1 retrieves data from the Internet by using JavaScript Object Notation (JSON).
You are developing the following code segment (line numbers are included for reference only):
You need to ensure that the code validates the JSON string. Which code should you insert at line 03?
App1 retrieves data from the Internet by using JavaScript Object Notation (JSON).
You are developing the following code segment (line numbers are included for reference only):
You need to ensure that the code validates the JSON string. Which code should you insert at line 03?
Question 10
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?
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?
Question 11
DRAG DROP
You have an application that uses paging. Each page displays five items from a list. You need to display the second page.
Which three code blocks should you use to develop the solution? To answer, move the appropriate code blocks from the list of code blocks to the answer area and arrange them in the correct order.
Solution:
References: https://stackoverflow.com/questions/2380413/paging-with-linq-for-objects
Does this meet the goal?
You have an application that uses paging. Each page displays five items from a list. You need to display the second page.
Which three code blocks should you use to develop the solution? To answer, move the appropriate code blocks from the list of code blocks to the answer area and arrange them in the correct order.
Solution:
References: https://stackoverflow.com/questions/2380413/paging-with-linq-for-objects
Does this meet the goal?
Question 12
DRAG DROP
You have the following code.
string MessageString = “This is the original message!”;
You need to store the SHA1 hash value of MessageString in a variable named HashValue. Which code should you use? Develop the solution by selecting and arranging the required code blocks in the correct order. You may not need all of the code blocks.
Solution:
Reference: Ensuring Data Integrity with Hash Codes https://msdn.microsoft.com/en-us/library/f9ax34y5(v=vs.110).aspx
Does this meet the goal?
You have the following code.
string MessageString = “This is the original message!”;
You need to store the SHA1 hash value of MessageString in a variable named HashValue. Which code should you use? Develop the solution by selecting and arranging the required code blocks in the correct order. You may not need all of the code blocks.
Solution:
Reference: Ensuring Data Integrity with Hash Codes https://msdn.microsoft.com/en-us/library/f9ax34y5(v=vs.110).aspx
Does this meet the goal?
Question 13
You are developing an application that will manage customer records. The application includes a method named FindCustomer.
Users must be able to locate customer records by using the customer identifier or customer name. You need to implement the FindCustomer() method to meet the requirement.
Which two sets of method signatures can you use to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
Users must be able to locate customer records by using the customer identifier or customer name. You need to implement the FindCustomer() method to meet the requirement.
Which two sets of method signatures can you use to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
Question 14
You are developing an application by using C#. You have the following requirements:
Support 32-bit and 64-bit system configurations.
Include pre-processor directives that are specific to the system configuration. Deploy an application version that includes both system configurations to testers. Ensure that stack traces include accurate line numbers.
You need to configure the project to avoid changing individual configuration settings every time you deploy the application to testers.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)
Support 32-bit and 64-bit system configurations.
Include pre-processor directives that are specific to the system configuration. Deploy an application version that includes both system configurations to testers. Ensure that stack traces include accurate line numbers.
You need to configure the project to avoid changing individual configuration settings every time you deploy the application to testers.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)
Question 15
DRAG DROP
You develop an application that displays information from log files when errors occur. The application will prompt the user to create an error report that sends details about the error and the session to
the administrator.
When a user opens a log file by using the application, the application throws an exception and closes. The application must preserve the original stack trace information when an exception occurs during this process.
You need to implement the method that reads the log files.
How should you complete the relevant 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.)
Solution:
StreamReader - Implements a TextReader that reads characters from a byte stream in a particular encoding.
Reference: http://msdn.microsoft.com/en-us/library/system.io.streamreader(v=vs.110).aspx
Once an exception is thrown, part of the information it carries is the stack trace. The stack trace is a list of the method call hierarchy that starts with the method that throws the exception and ends with the method that catches the exception. If an exception is re-thrown by specifying the exception in the throw statement, the stack trace is restarted at the current method and the list of method calls between the original method that threw the exception and the current method is lost. To keep the original stack trace information with the exception, use the throw statement without specifying the exception.
Reference: http://msdn.microsoft.com/en-us/library/ms182363(v=vs.110).aspx Incorrect:
StringReader - Implements a TextReader that reads from a string.
Reference: http://msdn.microsoft.com/en-us/library/system.io.stringreader(v=vs.110).aspx
Does this meet the goal?
You develop an application that displays information from log files when errors occur. The application will prompt the user to create an error report that sends details about the error and the session to
the administrator.
When a user opens a log file by using the application, the application throws an exception and closes. The application must preserve the original stack trace information when an exception occurs during this process.
You need to implement the method that reads the log files.
How should you complete the relevant 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.)
Solution:
StreamReader - Implements a TextReader that reads characters from a byte stream in a particular encoding.
Reference: http://msdn.microsoft.com/en-us/library/system.io.streamreader(v=vs.110).aspx
Once an exception is thrown, part of the information it carries is the stack trace. The stack trace is a list of the method call hierarchy that starts with the method that throws the exception and ends with the method that catches the exception. If an exception is re-thrown by specifying the exception in the throw statement, the stack trace is restarted at the current method and the list of method calls between the original method that threw the exception and the current method is lost. To keep the original stack trace information with the exception, use the throw statement without specifying the exception.
Reference: http://msdn.microsoft.com/en-us/library/ms182363(v=vs.110).aspx Incorrect:
StringReader - Implements a TextReader that reads from a string.
Reference: http://msdn.microsoft.com/en-us/library/system.io.stringreader(v=vs.110).aspx
Does this meet the goal?
Question 16
You are testing an application. The application includes methods named CalculateInterest and LogLine. The CalculateInterest() method calculates loan interest. The LogLine() method sends diagnostic messages to a console window.
The following code implements the methods. (Line numbers are included for reference only.)
You have the following requirements:
The CalculateInterest() method must run for all build configurations. The LogLine() method must run only for debug builds.
You need to ensure that the methods run correctly.
What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
The following code implements the methods. (Line numbers are included for reference only.)
You have the following requirements:
The CalculateInterest() method must run for all build configurations. The LogLine() method must run only for debug builds.
You need to ensure that the methods run correctly.
What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
Question 17
You are modifying an application that processes loans. The following code defines the Loan class. (Line numbers are included for reference only.)
Loans are restricted to a maximum term of 10 years. The application must send a notification message if a loan request exceeds 10 years.
You need to implement the notification mechanism.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)
Loans are restricted to a maximum term of 10 years. The application must send a notification message if a loan request exceeds 10 years.
You need to implement the notification mechanism.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)
Question 18
You are developing a game that allows players to collect from 0 through 1000 coins. You are creating a method that will be used in the game. The method includes the following code. (Line numbers are included for reference only.)
01 public string FormatCoins(string name, int coins) 02 {
03
04 }
The method must meet the following requirements:
Return a string that includes the player name and the number of coins.
Display the number of coins without leading zeros if the number is 1 or greater. Display the number of coins as a single 0 if the number is 0.
You need to ensure that the method meets the requirements. Which code segment should you insert at line 03?
01 public string FormatCoins(string name, int coins) 02 {
03
04 }
The method must meet the following requirements:
Return a string that includes the player name and the number of coins.
Display the number of coins without leading zeros if the number is 1 or greater. Display the number of coins as a single 0 if the number is 0.
You need to ensure that the method meets the requirements. Which code segment should you insert at line 03?
Question 19
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You have the following C# code. (Line numbers are included for reference only.)
You need the foreach loop to display a running total of the array elements, as shown in the following output.
13610
15
Solution: You insert the following code at line 02:
Does this meet the goal?
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You have the following C# code. (Line numbers are included for reference only.)
You need the foreach loop to display a running total of the array elements, as shown in the following output.
13610
15
Solution: You insert the following code at line 02:
Does this meet the goal?
Question 20
You are implementing a method named ProcessReports that performs a long-running task. The ProcessReports() method has the following method signature:
public void ProcessReports(List values,CancellationTokenSource cts, CancellationToken ct) If the calling code requests cancellation, the method must perform the following actions:
Cancel the long-running task.
Set the task status to TaskStatus.Canceled.
You need to ensure that the ProcessReports() method performs the required actions. Which code segment should you use in the method body?
public void ProcessReports(List
Cancel the long-running task.
Set the task status to TaskStatus.Canceled.
You need to ensure that the ProcessReports() method performs the required actions. Which code segment should you use in the method body?
Question 21
You are developing an application that includes a class named Customer and a generic list of customers. The following code segment declares the list of customers:
List customersList = new List () ;
You populate the customersList object with several hundred Customer objects. The application must display the data for five Customer objects at a time.
You need to create a method that will return the correct number of Customer objects. Which code segment should you use?
List
You populate the customersList object with several hundred Customer objects. The application must display the data for five Customer objects at a time.
You need to create a method that will return the correct number of Customer objects. Which code segment should you use?
Question 22
HOTSPOT
You are developing an application in C#.
You need to implement a custom exception for the application. You have the following code.
How should you complete the code? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.
Solution:
Does this meet the goal?
You are developing an application in C#.
You need to implement a custom exception for the application. You have the following code.
How should you complete the code? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.
Solution:
Does this meet the goal?
Question 23
You are developing an application.
You need to declare a delegate for a method that accepts an integer as a parameter, and then returns an integer.
Which type of delegate should you use?
You need to declare a delegate for a method that accepts an integer as a parameter, and then returns an integer.
Which type of delegate should you use?
Question 24
You are developing an application that includes a method named SendMessage.
You need to ensure that the SendMessage() method is called with the required parameters. Which two code segments can you use to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
You need to ensure that the SendMessage() method is called with the required parameters. Which two code segments can you use to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
Question 25
You have an application that will send confidential information to a Web server. You need to ensure that the data is encrypted when it is sent across the network. Which class should you use?
Question 26
DRAG DROP
You have the following code.
You need to return all of the products and their associated categories.
How should you complete the code? To answer, drag the appropriate code elements to the correct targets in the answer area. Each code element 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.
Solution:
Example: Join operations create associations between sequences that are not explicitly modeled in the data sources. For example you can perform a join to find all the customers and distributors who have the same location. In LINQ the join clause always works against object collections instead of database tables directly.
C#
var innerJoinQuery = from cust in customers
join dist in distributors on cust.City equals dist.City
select new { CustomerName = cust.Name, DistributorName = dist.Name }; Reference: https://msdn.microsoft.com/en-us/library/bb397927.aspx https://msdn.microsoft.com/en-us/library/bb397927.aspx
Does this meet the goal?
You have the following code.
You need to return all of the products and their associated categories.
How should you complete the code? To answer, drag the appropriate code elements to the correct targets in the answer area. Each code element 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.
Solution:
Example: Join operations create associations between sequences that are not explicitly modeled in the data sources. For example you can perform a join to find all the customers and distributors who have the same location. In LINQ the join clause always works against object collections instead of database tables directly.
C#
var innerJoinQuery = from cust in customers
join dist in distributors on cust.City equals dist.City
select new { CustomerName = cust.Name, DistributorName = dist.Name }; Reference: https://msdn.microsoft.com/en-us/library/bb397927.aspx https://msdn.microsoft.com/en-us/library/bb397927.aspx
Does this meet the goal?
Question 27
DRAG DROP
You are developing a class named Temperature.
You need to ensure that collections of Temperature objects are sortable. You have the following code:
Which code segments should you include in Target 1, Target 2 and Target 3 to complete the code? (To answer, drag the appropriate code segments to the correct targets 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.)
Solution:
Note: Target 1:
The role of IComparable is to provide a method of comparing two objects of a particular type. This is necessary if you want to provide any ordering capability for your object.
Incorrect: The role of IComparer is to provide additional comparison mechanisms. For example, you may want to provide ordering of your class on several fields or properties, ascending and descending order on the same field, or both.
Target 2, Target 3: Example:
// Implement IComparable CompareTo method - provide default sort order. int IComparable.CompareTo(object obj)
{
car c=(car)obj;
return String.Compare(this.make,c.make);
}
Reference: How to use the IComparable and IComparer interfaces in Visual C# https://support.microsoft.com/en-us/kb/320727
Does this meet the goal?
You are developing a class named Temperature.
You need to ensure that collections of Temperature objects are sortable. You have the following code:
Which code segments should you include in Target 1, Target 2 and Target 3 to complete the code? (To answer, drag the appropriate code segments to the correct targets 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.)
Solution:
Note: Target 1:
The role of IComparable is to provide a method of comparing two objects of a particular type. This is necessary if you want to provide any ordering capability for your object.
Incorrect: The role of IComparer is to provide additional comparison mechanisms. For example, you may want to provide ordering of your class on several fields or properties, ascending and descending order on the same field, or both.
Target 2, Target 3: Example:
// Implement IComparable CompareTo method - provide default sort order. int IComparable.CompareTo(object obj)
{
car c=(car)obj;
return String.Compare(this.make,c.make);
}
Reference: How to use the IComparable and IComparer interfaces in Visual C# https://support.microsoft.com/en-us/kb/320727
Does this meet the goal?
Question 28
You are creating an application that reads from a database.
You need to use different databases during the development phase and the testing phase by using conditional compilation techniques.
What should you do?
You need to use different databases during the development phase and the testing phase by using conditional compilation techniques.
What should you do?
Question 29
DRAG DROP
You are testing an application. The application includes methods named CalculateInterest and LogLine. The CalculateInterest() method calculates loan interest. The LogLine() method sends diagnostic messages to a console window.
You have the following requirements:
The CalculateInterest() method must run for all build configurations. The LogLine() method must be called only for debug builds.
You need to ensure that the methods run correctly.
How should you complete the relevant 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.)
Solution:
When the C# compiler encounters an #if directive, followed eventually by an #endif directive, it will compile the code between the directives only if the specified symbol is defined. Unlike C and C++, you cannot assign a numeric value to a symbol; the #if statement in C# is Boolean and only tests whether the symbol has been defined or not. For example,
#define DEBUG
#if DEBUG
Console.WriteLine("Debug version");
#endif
Reference: http://stackoverflow.com/questions/2104099/c-sharp-if-then-directives-for-debug-vsrelease
Does this meet the goal?
You are testing an application. The application includes methods named CalculateInterest and LogLine. The CalculateInterest() method calculates loan interest. The LogLine() method sends diagnostic messages to a console window.
You have the following requirements:
The CalculateInterest() method must run for all build configurations. The LogLine() method must be called only for debug builds.
You need to ensure that the methods run correctly.
How should you complete the relevant 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.)
Solution:
When the C# compiler encounters an #if directive, followed eventually by an #endif directive, it will compile the code between the directives only if the specified symbol is defined. Unlike C and C++, you cannot assign a numeric value to a symbol; the #if statement in C# is Boolean and only tests whether the symbol has been defined or not. For example,
#define DEBUG
#if DEBUG
Console.WriteLine("Debug version");
#endif
Reference: http://stackoverflow.com/questions/2104099/c-sharp-if-then-directives-for-debug-vsrelease
Does this meet the goal?