Classes And Objects In C Sharp — Part 2 MCQs with Explanations

4 3 4 is the correct answer to “What will be the output of the following C# code? static void Main(string[] args) { Mul(); m(); Console.ReadLine(); } static void Mul() { Console.WriteLine("4"); } static void m() { Console.WriteLine("3"); Mul(); }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

initialize the objects is the correct answer to “Which among the following is the correct statement: Constructors are used to”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

When the valid range of byte exceeds, the compiler will report an error is the correct answer to “What will be the correct statement of the following C# code? enum color:byte { yellow = 500, green = 1000, pink = 1300 }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

Values of the enum elements cannot be populated from database is the correct answer to “Choose the correct statement about enum used in C#.NET”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

10 15 is the correct answer to “What will be the output of the following C# code? { struct abc { int i; } class Program { static void Main(string[] args) { abc x = new abc(); abc z; x.i = 10; z = x; z.i = 15; console.Writeline(x.i + " " + y.i) } } }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

Runtime Error is the correct answer to “What will be the output of the following C# code snippet? class maths { public int fact(int n) { int result; result = fact(n - 1) * n; return result; } } class Program { static void Main(string[] args) { maths obj = new maths(); Console.WriteLine(obj.fact(4)); Console.ReadLine(); } }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

compile time error is the correct answer to “What will be the output of the following C# code? class A { public int i; private int j; } class B :A { void display() { base.j = base.i + 1; Console.WriteLine(base.i + " " + base.j); } } class Program { static void Main(string[] args) { B obj = new B(); obj.i = 1; obj.j = 2; obj.display(); Console.ReadLine(); } }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

Sealed is the correct answer to “Which of the given modifiers can be used to prevent Method overriding”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

new is the correct answer to “Which of the following keyword is used to change data and behavior of a base class by replacing a member of the base class with a new derived member”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

An interface could not contain signature of the indexer is the correct answer to “Choose the wrong statement about 'INTERFACE' in C#.NET”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

All of the mentioned is the correct answer to “Selecting appropriate method out of number of overloaded methods by matching arguments in terms of number, type and order and binding that selected method to object at compile time is called”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

private is the correct answer to “If no access modifier for a class is specified, then class accessibility is defined as”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

25 125 is the correct answer to “What will be the output of the following C# code? static void Main(string[] args) { int a = 5; int s = 0, c = 0; Mul (a, ref s, ref c); Console.WriteLine(s + "t " +c); Console.ReadLine(); } static void Mul (int x, ref int ss, ref int cc) { ss = x * x; cc = x * x * x; }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

Any number is the correct answer to “Number of constructors a class can define is”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

all of the mentioned is the correct answer to “Correct way to overload +operator”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

private is the correct answer to “The data members of a class by default are”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

10 35.78 is the correct answer to “What will be the output of the following C# code? static void Main(string[] args) { int i = 10; double d = 35.78; fun(i); fun(d); Console.ReadLine(); } static void fun(double d) { Console.WriteLine(d); }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

a b is the correct answer to “What will be the Correct statement in the following C# code? class baseclass { int a; public baseclass(int a1) { a = a1; console.writeline(" a "); } class derivedclass : baseclass { public derivedclass (int a1) : base(a1) { console.writeline(" b "); } } class program { static void main(string[] args) { derivedclass d = new derivedclass(20); } } }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

Method overriding is the correct answer to “The process of defining a method in a subclass having same name & type signature as a method in its superclass is known as”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

An enum can have Single and Double values is the correct answer to “Wrong statement about enum used in C#.NET is”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

none of the mentioned is the correct answer to “What is the return type of destructor”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

1 2 is the correct answer to “What will be the output of the following C# code? class A { public int i; protected int j; } class B : A { public int j; public void display() { base.j = 3; Console.WriteLine(i + " " + j); } } class Program { static void Main(string[] args) { B obj = new B(); obj.i = 1; obj.j = 2; obj.display(); Console.ReadLine(); } }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

Public is the correct answer to “Access specifiers which can be used for an interface are”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

24 bytes is the correct answer to “A class consists of two interfaces with each interface consisting of three methods. The class had no instance data. Which of the following indicates the correct size of object created from this class”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

All of the mentioned is the correct answer to “Choose the correct statements among the following:”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

7 8 is the correct answer to “What will be the output of the following C# code? class overload { public int x; int y; public int add(int a) { x = a + 1; return x; } public int add(int a, int b) { x = a + 2; return x; } } class Program { static void Main(string[] args) { overload obj = new overload(); overload obj1 = new overload(); int a = 0; obj.add(6); obj1.add(6, 2); Console.WriteLine(obj.x); Console.WriteLine(obj1.x); Console.ReadLine(); } }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

ref is the correct answer to “Which reference modifier is used to define reference variable”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

hello bye is the correct answer to “What will be the output of the following C# code? class maths { int i; public maths(int x) { i = x; Console.WriteLine(" hello: "); } } class maths1 : maths { public maths1(int x) :base(x) { Console.WriteLine("bye"); } } class Program { static void Main(string[] args) { maths1 k = new maths1(12); Console.ReadLine(); } }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

Encapsulation is the correct answer to “"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."”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

All of the mentioned is the correct answer to “To override a method in the subclass, the base class method should be defined as”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

12 bytes is the correct answer to “Calculate the number of bytes a structure variable s occupies in the memory if it is defined as follows. class abc { int i; Decimal d; } struct sample { private int x; private Single y; private trial z; } sample s = new sample();”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

Recursion is a process of defining a method that calls itself repeatedly is the correct answer to “What is Recursion in CSharp defined as”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

144, 26, 4 is the correct answer to “What will be the output of the following C# code? class maths { int i; public maths(int ii) { ii = 12; int j = 12; int r = ii * j; Console.WriteLine(r); } } class maths1 : maths { public maths1(int u) :base(u) { u = 13; int h = 13; Console.WriteLine(u + h); } } class maths2 : maths1 { public maths2(int k) :base(k) { k = 24; int o = 6 ; Console.WriteLine(k /o); } } class Program { static void Main(string[] args) { maths2 t = new maths2(10); Console.ReadLine(); } }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

Base is the correct answer to “Which keyword is used to refer baseclass constructor to subclass constructor”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

Syntax error as t is unassigned variable which is never used is the correct answer to “What will be the output of the following C# code? class test { public void print() { Console.WriteLine("Csharp:"); } } class Program { static void Main(string[] args) { test t; t.print(); Console.ReadLine(); } }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

public int cube(int x) { return (x + x); } is the correct answer to “Which return statement correctly returns the output”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

All of the mentioned is the correct answer to “Which statements among following are correct”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

Interfaces is the correct answer to “Which of these can be used to fully abstract a class from its implementation”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

Private, protected, public, internal, protected internal is the correct answer to “Select the class visibility modifiers among the following:”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.

2 is the correct answer to “What will be the output of the following C# code? namespace ConsoleApplication4 { abstract class A { int i; public abstract void display(); } class B: A { public int j; public override void display() { Console.WriteLine(j); } } class Program { static void Main(string[] args) { B obj = new B(); obj.j = 2; obj.display(); Console.ReadLine(); } } }”. This question is standard in competitive examination syllabi for Classes And Objects In C Sharp.