Description : Write some code for a for loop
Last Answer : for (int i = 1; i <= 5; i++) Console.WriteLine(i);
Description : Define what is a basic difference between the while loop and do-while loop in C#?
Last Answer : The while loop tests its condition at the beginning, which means that the enclosed set of statements run for zero or more number of times if the condition evaluates to true. The do while loop iterates a set of statements at least once and then checks the condition at the end.
Description : Write some code for do… while.
Last Answer : int x; int y = 0; do { x = y++; Console.WriteLine(x); } while(y < 5);
Description : Can you increment multiple variables in a for loop control?
Last Answer : Yes – e.g. for (int i = 1; j = 2;i
Description : Write some code to declare and use properties.
Last Answer : // instance public string InstancePr { get { return a; } set { a = value; } } //read-only static public static int ClassPr { get { return b; } }
Description : Write some code to implement an indexer.
Last Answer : using System; namespace Console1 { class Class1 { static void Main(string[] args) { MyIndexableClass m = new MyIndexableClass(); Console.WriteLine(m[0]); Console.WriteLine(m[1]); Console.WriteLine(m[2]); Console. ... get { return myData[i]; } set { myData[i] = value; } } } }
Description : Write some code that uses an ArrayList.
Last Answer : ArrayList list = new ArrayList(); list.Add("Hello"); list.Add("World");
Description : Write some code to implement a jagged array.
Last Answer : // Declare the array of two elements: int[][] myArray = new int[2][]; // Initialize the elements: myArray[0] = new int[5] {1,3,5,7,9}; myArray[1] = new int[4] {2,4,6,8};
Description : Write some code to implement a multidimensional array.
Last Answer : int[,] b = {{0, 1}, {2, 3}, {4, 5}, {6, 7}, {8, 9}};
Description : Write some code for a custom collection class.
Last Answer : using System; using System.Collections; public class Items : IEnumerable { private string[] contents; public Items(string[] contents) { this.contents = contents; } public IEnumerator GetEnumerator() { ... (string item in items) { Console.WriteLine(item); } Console.ReadLine(); } }
Description : Write some code that declares an array on ints, assigns the values: 0,1,2,5,7,8,11 to that array and use a foreach to do something with those values.
Last Answer : int x = 0, y = 0; int[] arr = new int [] {0,1,2}; foreach (int i in arr) { if (i%2 == 0) x++; else y++; }
Description : Write some if… else if… code.
Last Answer : int n=4; if (n==1) Console.WriteLine("n=1"); else if (n==2) Console.WriteLine("n=2"); else if (n==3) Console.WriteLine("n=3"); else Console.WriteLine("n>3");
Description : Write some try…catch…finally code.
Last Answer : // try-catch-finally using System; public class TCFClass { public static void Main () { try { throw new NullReferenceException(); } catch(NullReferenceException e) { Console.WriteLine("{0} exception 1 ... ("exception 2."); } finally { Console.WriteLine("finally block."); } } }
Description : Write some code to overload an operator.
Last Answer : class TempleCompare { public int templeCompareID; public int templeValue; public static bool operator == (TempleCompare x, TempleCompare y) { return (x.templeValue == y.templeValue); } ... templeValue); } public override int GetHashCode() { return templeCompareID; } }
Description : Write some code to box and unbox a value type.
Last Answer : // Boxing int i = 4; object o = i; // Unboxing i = (int) o;
Description : Write some code to use a delegate.
Last Answer : Member function with a parameter using System; namespace Console1 { class Class1 { delegate void myDelegate(int parameter1); static void Main(string[] args) { MyClass myInstance = new ... void AMethod(int param1) { Console.WriteLine(param1); } } }
Description : Write some code using interfaces, virtual methods, and an abstract class.
Last Answer : using System; public interface Iexample1 { int MyMethod1(); } public interface Iexample2 { int MyMethod2(); } public abstract class ABSExample : Iexample1, Iexample2 { public ABSExample( ... override void VIRTMethod2() { System.Console.WriteLine("VIRTMethod2 has been overridden"); } }
Description : Write code to use threading and the lock keyword.
Last Answer : using System; using System.Threading; namespace ConsoleApplication4 { class Class1 { [STAThread] static void Main(string[] args) { ThreadClass tc1 = new ThreadClass(1); ThreadClass tc2 = new ThreadClass( ... Console.WriteLine(threadNumber + " working"); Thread.Sleep(1000); } } } } }
Description : Write code to define and use your own custom attribute.
Last Answer : (From MSDN) // cs_attributes_retr.cs using System; [AttributeUsage(AttributeTargets.Class|AttributeTargets.Struct, AllowMultiple=true)] public class Author : Attribute { public Author(string name) { this.name ... double version; string name; public string GetName() { return name; } }
Description : Write code for a case statement.
Last Answer : switch (n) { case 1: x=1; break; case 2: x=2; break; default: goto case 1; }
Description : Write code for an enumeration.
Last Answer : public enum animals {Dog=1,Cat,Bear};
Description : Write code to show how a method can accept a varying number of parameters.
Last Answer : using System; namespace Console1 { class Class1 { static void Main(string[] args) { ParamsMethod(1,"example"); ParamsMethod(1,2,3,4); Console.ReadLine(); } static void ... o in list) { Console.WriteLine(o.ToString()); } } } }
Description : Briefly highlight the differences between imperative and declarative security as they pertain to code access security.
Last Answer : Imperative security is implemented by calling methods of Permission objects in code at run time. Declarative security is configured by attaching attributes representing permissions to classes ... request assembly-wide permissions using the Assembly (assembly) directive with declarative security.
Description : Describe how to use code to retrieve resources at run time.
Last Answer : You must first create an instance of the ResourceManager class that is associated with the assembly that contains the desired resource. You can then use the GetString method to retrieve string resources or the GetObject method to retrieve object resources.
Description : Explain how to convert data in legacy code page formats to the Unicode format.
Last Answer : You can use the Encoding.Convert method to convert data between encoding types. This method requires instances of both encoding types and an array of bytes that represents the data to be converted. ... GetBytes method and can convert an array of bytes back to chars with the Encoding.GetChars method.
Description : Describe how to retrieve the ASCII key code from a keystroke. How would you retrieve key combinations for non-ASCII keys?
Last Answer : Keystrokes can be intercepted by handling the KeyPress and KeyDown events. Both of these events relay information to their handling methods in the form of their EventArgs. The KeyPressEventArgs, ... you would handle the KeyDown event and use the properties exposed by the KeyEventArgs instance.
Description : What is unsafe code?
Last Answer : Unsafe code bypasses type safety and memory management.
Description : Why is the virtual keyword used in code?
Last Answer : The Virtual keyword is used in code to define methods and the properties that can be overridden in derived classes.
Description : Define what is a code group?
Last Answer : A code group is a set of assemblies that share a security context.
Description : Write the code given below using ‘for’ loop instead of ‘while’ loop : -Technology
Last Answer : The given code using ‘for’ loop instead of ‘while’ loop :int ifor (i = 1 ; i < = 5 ; i + +){if (1 * i = = 4)jTextFieldl. setText ( “ “ + i) ;}
Description : Can you change the value of a variable while debugging a C# application?
Last Answer : Yes. If you are debugging via Visual Studio.NET, just go to Immediate window.
Description : Can you declare the override method static while the original method is nonstatic?
Last Answer : No, you can’t, the signature of the virtual method must remain the same, only the keyword virtual is changed to keyword override.
Description : Do we get an error while executing the “finally” block in C#?
Last Answer : Yes. We may get an error in finally block.
Description : How would you read and write using the console?
Last Answer : Console.Write, Console.WriteLine, Console.Readline
Description : Write a hello world console application.
Last Answer : using System; namespace Console1 { class Class1 { [STAThread] // No longer needed static void Main(string[] args) { Console.WriteLine("Hello world"); } } }
Description : C# provides a default constructor for me. I write a constructor that takes a string as a parameter, but want to keep the no parameter one. How many constructors should I write?
Last Answer : Two. Once you write at least one constructor, C# cancels the freebie constructor, and now you have to write one yourself, even if there’s no implementation in it.
Description : Rewrite the following code using WHILE loop : -Technology
Last Answer : int x = 100 , i = 2;while (i < = 22){jTextAreal . append(' '+(i + x) ) ;x = x - 2 ;i = i + 4;}
Description : Write a short code using C++ to print out all odd number from 1 to 100 using a for loop
Last Answer : for( unsigned int i = 1; i < = 100; i++ ) if( i & 0x00000001 ) cout
Description : Describe Break mode and some of the available methods for navigating in Break mode.
Last Answer : Break mode allows you to observe program execution on a line-by-line basis. You can navigate program execution in Break mode by using Step Into, Step Over, Step Out, Run To Cursor, and Set Next Statement.
Description : List some compiler directives?
Last Answer : #if #else #elif #endif #define #undef #warning #error #line #region #endregion
Description : List some custom attribute scopes and possible targets.
Last Answer : Assembly – assembly Class – type Delegate - type, return
Description : Can you prevent your class from being inherited and becoming a base class for some other classes?
Last Answer : Yes, that’s what keyword sealed in the class definition is for. The developer trying to derive from your class will get a message: cannot inherit from Sealed class WhateverBaseClassName. It’s the same concept as final class in Java.
Description : List some of the advantages of C#?
Last Answer : Below are the advantages of C# – 1. Easy to learn 2. Object-oriented 3. Component-oriented 4. Part of .NET framework
Description : What si the difference between interface and abstractclass Select Answer: 1. interface contain only methods 2. we can't declare a variable for interface 3. interface contain only events 4. None 5. All
Last Answer : Ans : 2 The only Difference between Interface and Abstract class is we can declare a variable in abstract class but we can't declare in variable interface
Description : What is the lifespan for items stored in ViewState? Select Answer: 1. Item stored in ViewState exist for the life of the current page 2. Item stored in ViewState exist for the life ... of the current Applicaiton 4. Item stored in ViewState exist for the life of the current configuration
Last Answer : 1. Item stored in ViewState exist for the life of the current page AS any web application works on request and response basis ,so on every post backs, The data in control gets lost. To retain page ... control with data. The life cycle of the view state exist for life of current running page only.
Description : Which one of the following tools is used to view the metadata information contained in a .NET assembly? Select Answer: 1. al.exe 2. ilasm.exe 3. vbx.exe 4. csc.exe 5. ildasm.exe
Last Answer : 5. ildasm.exe
Description : How would you ensure that all relevant registry entries were removed in the event that installation of your application failed?
Last Answer : You can ensure that registry entries are removed, as well as perform any other “clean-up” tasks, by creating an Installer class and writing the appropriate code in the Rollback event handler. Then create a new Custom Action and set the InstallerClass, and EntryPoint properties to appropriate values.
Description : Describe a general strategy for creating a setup project that terminates installation if a specific file is not already installed on the target machine.
Last Answer : First, create a file search to search the file system for the specific file. Then create a launch condition to evaluate the results of the search. You can connect the launch condition to ... in the search's Property property in the expression specified by the launch condition's Condition property.
Description : What is the purpose of a bootstrapper application? When do you not need to create one?
Last Answer : A bootstrapper application automatically detects if Windows Installer is installed on the target machine. If Windows Installer is not present, it installs Windows Installer before proceeding with the rest ... Installer 1.5 already installed) or have had Microsoft Installer 1.5 installed previously.