gs gs108 Classes - Fundamentals of Class - Quiz No.1
gs gs108 CSharp Quiz
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Question 1: What will be the output of the following C# code?
class sample { public int i; public int[] arr = new int[10]; public void fun(int i, int val) { arr[i] = val; } } class Program { static void Main(string[] args) { sample s = new sample(); s.i = 10; sample.fun(1, 5); s.fun(1, 5); Console.ReadLine(); } }
sample.fun(1, 5) will not work correctly
s.i = 10 cannot work as i is ‘public’
sample.fun(1, 5) will set value as 5 in arr[1]
s.fun(1, 5) will work correctly
Question 2: Which of the following is used to define the member of a class externally?
:
::
#
none of the mentioned
Question 4: What is the most specified using class declaration?
type
scope
type & scope
none of the mentioned
Question 5: What will be the output of the following C# code?
class sample { public int i; public int j; public void fun(int i, int j) { this.i = i; this.j = j; } } class Program { static void Main(string[] args) { sample s = new sample(); s.i = 1; s.j = 2; s.fun(s.i, s.j); Console.WriteLine(s.i + " " + s.j); Console.ReadLine(); } }
Error while calling s.fun() due to inaccessible level
Error as ‘this’ reference would not be able to call ‘i’ and ‘j’
1 2
Runs successfully but prints nothing
Question 6: Which of the following statements about objects in “C#” is correct?
Everything you use in C# is an object, including Windows Forms and controls
Objects have methods and events that allow them to perform actions
All objects created from a class will occupy equal number of bytes in memory
All of the mentioned
Question 7: “A mechanism that binds together code and data in manipulates, and keeps both safe from outside interference and misuse. In short it isolates a particular code and data from all other codes and data. A well-defined interface controls access to that particular code and data.”
Abstraction
Polymorphism
Inheritance
Encapsulation
Question 8: What will be the output of the following C# code?
class z { public int X; public int Y; public const int c1 = 5; public const int c2 = c1 * 25; public void set(int a, int b) { X = a; Y = b; } } class Program { static void Main(string[] args) { z s = new z(); s.set(10, 20); Console.WriteLine(s.X + " " + s.Y); Console.WriteLine(z.c1 + " " + z.c2); Console.ReadLine(); } } 10 20 5 2520 10 25 510 20 5 12520 10 125 5
Question 9: Correct way of declaration of object of the following class is?
class name
name n = new name();
n = name();
name n = name();
n = new name();
Question 10: The data members of a class by default are?
protected, public
private, public
private
public
