C#, .Net Technology

Question: Which of the following code samples will check if a file is in use?
A
protected virtual bool IsFileLocked(FileInfo file) { FileStream stream = null; try { stream = file.Open(FileMode.Open, FileAccess.ReadWrite, FileShare.None); } catch (IOException) { return true; } finally { if (stream != null) stream.Close(); } return false; }

B
try { using (Stream stream = new FileStream("MyFilename.txt", FileMode.Open)) { } } catch { }

C
internal static bool FileOrDirectoryExists(string name) { return (Directory.Exists(name) || File.Exists(name)) }

D
FileInfo file = new FileInfo("file.txt"); if (file.Exists) { // TO DO }

Note: Not available
1. Report
Question: Which of the following statements is true regarding the code samples below? A: try { // code goes here } catch (Exception e) { throw e; } B: try { // code goes here } catch (Exception e) { throw; }
A
A will lose the call stack trace information. B will preserve the call stack trace information.

B
A will preserve the call stack trace information. B will lose the call stack trace information.

C
Both A and B will preserve the call stack trace information.

D
Both A and B will lose the call stack trace information.

Note: Not available
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Question: Which of the following is the correct way to implement deep copying of an object in C#?
A
By using the System.Runtime.Serialization.Formatters.Binary.BinaryFormatter class.

B
By using the System.Reflection.DeepCopy class.

C
By using the DeepCopy() method of Object class.

D
By using the MemberwiseClone() method of Object class.

Note: Not available
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Question: What will be the output of the following Main program in a C# console application (Assume required namespaces are included)?
static void Main(string[] args) { string Invalid = "$am$it$"; string sResult = Invalid.Trim(new char[]{'$'}); Console.WriteLine(sResult); Console.ReadLine(); }
A
amit

B
am@am$

C
$am$it$

D
am$it

Note: Not available
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Question: Which of the following is the correct way to perform a LINQ query on a DataTable object?
A
var results = from myRow in myDataTable where results.Field("RowNo") == 1 select results;

B
var results = from myRow in myDataTable.AsEnumerable() where myRow.Field("RowNo") == 1 select myRow;

C
var results = from myRow in myDataTable.Rows where myRow.Field<int>("RowNo") == 1 select myRow;

D
var results = from myRow in myDataTable.AsEnumerable() where myRow.Field<int>("RowNo") == 1 select new { IID= myRow.Field<int>("IID"), Date = myRow.Field<DateTime>("Date"), };

Note: Not available
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Question: What is the purpose of the vshost.exe file in Visual Studio?
A
It is used to improve the performance of the Visual Studio debugger.

B
It is used to improve the performance of Visual Studio plugins.

C
It is used to improve the performance of the C# compiler.

D
It is used to load Visual Studio configuration data.

Note: Not available
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Question: Which of the following code snippets for catch shows a better way of handling an exception? 1. catch (Exception exc) { throw exc; } 2. catch (Exception exc) { throw; }
A
1 is better as it maintains the call stack.

B
2 is better as it maintains the call stack.

C
Both are same.

D
None of these.

Note: Not available
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Question: What will be the value of result after these two statements? int num1 = 10, num2 = 9; int result = num1 ^ num2;
A
1

B
8

C
9

D
10

E
109

F
3

Note: Not available
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Question: What will be the output of the following Main program in a C# console application (Assume required namespaces are included)?
static void Main(string[] args) { string sPrint = String.Format("{{ My name is bond. }}"); Console.WriteLine(sPrint); Console.ReadLine(); }
A
{{ My name is bond. }}

B
It will throw a compilation error.

C
{ My name is bond. }

D
It will throw a runtime error.

Note: Not available
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Question: What is the difference between data types "System.String" and "string" in C#?
A
string is a value type, while System.String is a reference type.

B
There is no difference,string is just an alias of the System.String data type.

C
string variable is limited to storing alphabetic characters, while System.String does not have any limit.

D
None of these.

Note: Not available
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Question: Which of the following code samples will check if a file is in use?

Question: Which of the following statements is true regarding the code samples below? A: try { // code goes here } catch (Exception e) { throw e; } B: try { // code goes here } catch (Exception e) { throw; }

Question: Which of the following is the correct way to implement deep copying of an object in C#?

Question: What will be the output of the following Main program in a C# console application (Assume required namespaces are included)?
static void Main(string[] args) { string Invalid = "$am$it$"; string sResult = Invalid.Trim(new char[]{'$'}); Console.WriteLine(sResult); Console.ReadLine(); }

Question: Which of the following is the correct way to perform a LINQ query on a DataTable object?

Question: What is the purpose of the vshost.exe file in Visual Studio?

Question: Which of the following code snippets for catch shows a better way of handling an exception? 1. catch (Exception exc) { throw exc; } 2. catch (Exception exc) { throw; }

Question: What will be the value of result after these two statements? int num1 = 10, num2 = 9; int result = num1 ^ num2;

Question: What will be the output of the following Main program in a C# console application (Assume required namespaces are included)?
static void Main(string[] args) { string sPrint = String.Format("{{ My name is bond. }}"); Console.WriteLine(sPrint); Console.ReadLine(); }

Question: What is the difference between data types "System.String" and "string" in C#?

Question: Which of the following code samples will check if a file is in use?

Question: Which of the following statements is true regarding the code samples below? A: try { // code goes here } catch (Exception e) { throw e; } B: try { // code goes here } catch (Exception e) { throw; }

Question: Which of the following is the correct way to implement deep copying of an object in C#?

Question: What will be the output of the following Main program in a C# console application (Assume required namespaces are included)?static void Main(string[] args) { string Invalid = "$am$it$"; string sResult = Invalid.Trim(new char[]{'$'}); Console.WriteLine(sResult); Console.ReadLine(); }

Question: Which of the following is the correct way to perform a LINQ query on a DataTable object?

Question: What is the purpose of the vshost.exe file in Visual Studio?

Question: Which of the following code snippets for catch shows a better way of handling an exception? 1. catch (Exception exc) { throw exc; } 2. catch (Exception exc) { throw; }

Question: What will be the value of result after these two statements? int num1 = 10, num2 = 9; int result = num1 ^ num2;

Question: What will be the output of the following Main program in a C# console application (Assume required namespaces are included)?static void Main(string[] args) { string sPrint = String.Format("{{ My name is bond. }}"); Console.WriteLine(sPrint); Console.ReadLine(); }

Question: What is the difference between data types "System.String" and "string" in C#?

Question: What will be the output of the following Main program in a C# console application (Assume required namespaces are included)?
static void Main(string[] args) { string Invalid = "$am$it$"; string sResult = Invalid.Trim(new char[]{'$'}); Console.WriteLine(sResult); Console.ReadLine(); }

Question: What will be the output of the following Main program in a C# console application (Assume required namespaces are included)?
static void Main(string[] args) { string sPrint = String.Format("{{ My name is bond. }}"); Console.WriteLine(sPrint); Console.ReadLine(); }