1- Which of the following will be the correct output for the C#.NET program given below? namespace IndiabixConsoleApplication { struct Sample { public int i; } class MyProgram { static void Main(string[] args) { Sample x = new Sample(); x.i = 10; fun(ref x); Console.Write(x.i + " "); } public static void fun(ref Sample y) { y.i = 20; Console.Write(y.i + " "); } } } A- 20 10 B- 10 20 C- 10 10 D- 20 20 2- Which of the following statements is correct? A- A struct never declares a default constructor. B- All value types in C# inherently derive from ValueType, which inherits from Object. C- A struct never declares a default destructor. D- In C#, classes and structs are semantically same. 3- Which of the following statements are correct about the structure declaration given below? struct Book { private String name; protected int totalpages; public Single price; public void Showdata() { Console.WriteLine(name + " " + totalpages + " " + price); } Book() { name = " "; totalpages = 0; price = 0.0f; } } Book b = new Book(); We cannot declare the access modifier of totalpages as protected. We cannot declare the access modifier of name as private. We cannot define a zero-argument constructor inside a structure. We cannot declare the access modifier of price as public. We can define a Showdata() method inside a structure. A- 1, 2 B- 1, 3, 5 C- 2, 4 D- 3, 4, 5 4- Which of the following are true about classes and struct? A class is a reference type, whereas a struct is a value type. Objects are created using new, whereas structure variables can be created either using new or without using new. A structure variable will always be created slower than an object. A structure variable will die when it goes out of scope. An object will die when it goes out of scope. A- 1, 2, 4 B- 3, 5 C- 2, 4 D- 3, 4, 5 5- Which of the following will be the correct output for the program given below? namespace IndiabixConsoleApplication { struct Sample { public int i; } class MyProgram { static void Main(string[] args) { Sample x = new Sample(); Sample y; x.i = 9; y = x; y.i = 5; Console.WriteLine(x.i + " " + y.i); } } } A- 9 9 B- 9 5 C- 5 5 D- 5 9 6- Which of the following statements are correct about Structures used in C#.NET? A Structure can be declared within a procedure. Structs can implement an interface but they cannot inherit from another struct. struct members cannot be declared as protected. A Structure can be empty. It is an error to initialize an instance field in a struct. A- 1, 2, 4 B- 2, 3, 5 C- 2, 4 D- 1, 3 7- Which of the following statements are correct about an enum used inC#.NET? By default the first enumerator has the value equal to the number of elements present in the list. The value of each successive enumerator is decreased by 1. An enumerator contains white space in its name. A variable cannot be assigned to an enum element. Values of enum elements cannot be populated from a database. A- 1, 2 B- 3, 4 C- 4, 5 D- 1, 4 8- Which of the following statements is correct about the C#.NET code snippet given below? int a = 10; int b = 20; int c = 30; enum color: byte { red = a, green = b, blue = c } A- Variables cannot be assigned to enum elements. B- Variables can be assigned to any one of the enum elements. C- Variables can be assigned only to the first enum element. D- Values assigned to enum elements must always be successive values. 9- Which of the following statements is true about an enum used in C#.NET? A- An implicit cast is needed to convert from enum type to an integral type. B- An enum variable cannot have a public access modifier. C- An enum variable cannot have a private access modifier. D- An enum variable can be defined inside a class or a namespace. 10- Which of the following is the correct output for the C#.NET code snippet given below? enum color { red, green, blue } color c; c = color.red; Console.WriteLine(c); A- 1 B- -1 C- red D- 0
Posted on: Sat, 08 Jun 2013 23:18:22 +0000
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