Description : Can multiple catch blocks be executed for a single try statement?
Last Answer : No. Once the proper catch block processed, control is transferred to the finally block (if there are any).
Description : Can we have only “try” block without “catch” block in C#?
Last Answer : Yes, we can have only try block without catch block.
Description : Write the syntax of try-catch-finally blocks.
Last Answer : try{ //Statements to be monitored for any exception } catch(ThrowableInstance1 obj) { //Statements to execute if this type of exception occurs } catch(ThrowableInstance2 obj2) { //Statements }finally{ //Statements which should be executed even if any exception happens }
Description : I am present on a winter's day, Surprise me and I am taken away. The faster you run, the harder I am to catch, Try all you can, I am not easy to snatch. I am always with you, somewhere in the ... a sound. Keep your head cool and you will finally see, That I am inside you. What could I be? -Riddles
Last Answer : Your breath.
Description : The Keywords - try, catch, and finally are typically used in the sequence: a) Finally, Try and Catch b) Try, Finally and Catch c) Try, Catch and Finally d) Catch, Try and Finally e) None of The Above
Last Answer : c) Try, Catch and Finally
Description : Will the finally block get executed if an exception has not occurred?
Last Answer : Yes.
Description : Can Continue exit a finally block?
Last Answer : No
Description : Can break exit a finally block?
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 : Define what is the difference between “finalize” and “finally” methods in C#?
Last Answer : Finalize – This method is used for garbage collection. So before destroying an object, this method is called as part of the cleanup activity. Finally – This method is used for executing the code irrespective of exception occurred or not.
Description : Why use “finally” block in C#?
Last Answer : Finally block will be executed irrespective of exception. So while executing the code in try block when an exception occurs, control is returned to catch block and at last finally block will be ... the closing connection to database / releasing the file handlers can be kept in finally block.
Description : Can multiple catch blocks be executed?
Last Answer : No, once the proper catch code fires off, the control is transferred to the finally block (if there are any), and then whatever follows the finally block.
Description : What’s the C# syntax to catch any possible exception?
Last Answer : A catch block that catches the exception of type System.Exception. You can also omit the parameter data type in this case and just write catch {}.
Description : Can C# have multiple catch blocks?
Last Answer : Yes
Description : Can we execute multiple catch blocks in C#?
Last Answer : No. Once an exception has occurred it executes specific exception catch block and the control comes out.
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 code for do… while.
Last Answer : int x; int y = 0; do { x = y++; Console.WriteLine(x); } while(y < 5);
Description : Write some code for a while loop.
Last Answer : int n = 1; while (n < 6) { Console.WriteLine("Current value of n is {0}", n); n++; }
Description : Write some code for a for loop
Last Answer : for (int i = 1; i <= 5; i++) Console.WriteLine(i);
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 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 : 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 : A man took a walk in the park. While on his walk, he came across a stray dog who began growling at him and nipped at his heels. The man pulled a crooked stick from his knapsack, told the dog to, 'Fetch ... ----- bit the man on the leg. What was going on here that so infuriated the dog to -Riddles
Last Answer : The man had tormented the dog in the park in the past by telling the dog to fetch the crooked stick (wooden boomerang) he carried with him in his knapsack. The dog could never catch the boomerang, ... who only wanted to play. What goes around comes around, as they say, with boomerangs and in life.
Description : Early success: What are practical examples that show it's better to do your best early, rather than try to catch up in the middle or end?
Last Answer : Well, this isn't really a real life example, But the story of the Tortoise and the Hare seems to teach this lesson pretty well. But if your entertaining college students, You might want to go with ... frat guy who both had to study for the same statistics exam. and well you can see the parallels.