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QUESTION 260
You are creating a console application named App1.
App1 will validate user input for order entries.
You are developing the following code segment (line numbers are included for reference only):
You need to complete the code segment.
The solution must ensure that prices are positive and have two decimal places.
Which code should you insert at line 03?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: D
Explanation:
Regex.IsMatch Method (String, String)
Indicates whether the specified regular expression finds a match in the specified input string.
QUESTION 261
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?
A. IntelliTrace
B. Memory Usage from Performance Profiler
C. Performance Wizard from Performance Profiler
D. Code Analysis
Answer: B
Explanation:
https://msdn.microsoft.com/en-US/library/dn645469(VS.140).aspx
QUESTION 262
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.
1
3
6
10
15
Solution: You insert the following code at line 02:
Does this mee
t the goal?
A. Yes
B. No
Answer: B
QUESTION 263
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.
1
3
6
10
15
Solution: You insert the following code at line 02:
Does this meet the goal?
A. Yes
B. No
Answer: B
QUESTION 264
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.
1
3
6
10
15
Solution: You insert the following code at line 02:
Does this meet the goal?
A. Yes
B. No
Answer: B
Explanation:
x += y is equivalent to x = x + y
References: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/operators/addition-assignment-operator
QUESTION 265
You are developing a C# application. The application includes the following code segment. (Line numbers are included for reference only.)
The application fails at line 17 with the following error message: “An item with the same key has already been added.”
You need to resolve the error.
Which code segment should you insert at line 16?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: B
Explanation:
Use if statement with ContainsKey method to check if dictionary already contains the specified key.
https://msdn.microsoft.com/en-us/library/kw5aaea4(v=vs.110).aspx
https://www.c-sharpcorner.com/UploadFile/mahesh/how-to-find-a-key-in-a-dictionary-with-C-Sharp/
QUESTION 266
You have two assemblies named Assembly1 and Assembly2 that are written in C#. Assembly1 loads Assembly2 by executing the following code.
You create a new project in Microsoft Visual Studio to build a new assembly that will replace Assembly2. The new assembly has the same name and version as the original Assembly2 assembly.
When you execute the code, Assembly1 cannot load Assembly2.
What should you do to ensure that Assembly1 can load Assembly2?
A. Modify the project properties. Click Sign the assembly and select a new key file.
B. Run the sn.exe command to create a new key file.
Run the al.exe command to sign Assembly2 by using the generated key file.
C. Use the sn.exe command to create a new key file.
Set the attribute to the new key file.
assembly:AssemblyKeyFileAttribute
D. Run the al.exe command to sign Assembly2.
Use the same key file used for the original assembly.
Assembly2
Answer: B
Explanation:
https://docs.microsoft.com/en-us/dotnet/framework/app-domains/how-to-sign-an-assembly-with-a-strong-name
QUESTION 267
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.
1
3
6
10
15
Solution: You insert the following code at line 02:
Does this meet the goal?
A. Yes
B. No
Answer: B
QUESTION 268
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?
A. 
B. 
C. 
D. 
Answer: C
QUESTION 269
You have two assemblies named Assembly1 and Assembly2 that are written in C#. Assembly1 loads Assembly2 by executing the following code.
You create a new project in Microsoft Visual Studio to build a new assembly that will replace Assembly2. The new assembly has the same name and version as the original Assembly2 assembly.
When you execute the code, Assembly1 cannot load Assembly2.
What should you do to ensure that Assembly1 can load Assembly2?
A. Modify the project properties. Click Delay sign only.
B. Change the version of new Assembly2 assembly to 1.0.2.5.
C. Use the sn.exe command to create a new key file. Set the attribute to the new key file.
assembly:AssemblyKeyFileAttribute
D. Run the al.exe command to sign Assembly2. Use the same key file used for the original assembly.
Assembly2
Answer: C
QUESTION 270
You have the following C# code that manipulates a string.
What is the value of result after the code executes?
A. This is a sentence.
B. Thrandom random a random sentence.
C. This is a is sentence.
D. This random sentence.
Answer: D
Explanation:
https://docs.microsoft.com/en-us/dotnet/api/system.string.substring?view=netframework-4.7.2
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