Arrays and Strings in C Sharp MCQ question and answer with solution

21

What is the String in C# meant for?

A) Variable B) Character Array C) Object D) Class

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Answer & Solution

Answer: Option C

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22

Which of these operators can be used to concatenate two or more String objects?

A) + B) += C) & D) ||

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Answer & Solution

Answer: Option A

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23

Which of these is used as a default specifier for a member of the class if no access specifier is used for it?

A) private B) public C) public, within its own class D) protected

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Answer & Solution

Answer: Option A

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24

What will be the output of the following C# code?

static void Main(string[] args)
{
    string s1 = " Cshr ";
    string s2 = s1.Insert(3 , " a ");
    string s3 = s2.Insert(5 , " p ");
    for (int i = 0;i < s3.Length; i++)
    Console.WriteLine(s3[i]);
    Console.ReadLine();
}

A) Cshar B) CsharP C) Csharp D) Cshrap

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Answer & Solution

Answer: Option C

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25

What will be the output of the following C# code?

static void Main(string[] args)
{
    string s1 = "Hello I Love Csharp ";
    Console.WriteLine(Convert.ToChar( (s1.IndexOf('I') - s1.IndexOf('l')) * s1.IndexOf('p'));
    Console.ReadLine();
}

A) I B) Hello I C) Love D) H

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Answer & Solution

Answer: Option D

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26

The method in which large or variable number of arguments are handled is known as . . . . . . . .

A) Value parameters B) Output parameters C) Parameter arrays D) None of the mentioned

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Answer & Solution

Answer: Option C

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27

Which among the following is the correct way to find out the index of second 's' in the string "She sold her beauty in one night to someone else"?

A)

String a = "She sold her beauty in one night to someone else";
int i;
i = a.SecondIndexOf("s");

B)

String a = "She sold her beauty in one night to someone else";
int i, j;
i = a.FirstIndexOf("s");
j = a.IndexOf("s", i + 1);

C)

String a = "She sold her beauty in one night to someone else";
int i, j;
i = a.IndexOf("s");
j = a.IndexOf("s", i + 1);

D) None of the mentioned

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Answer & Solution

Answer: Option C

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28

What will be the output of the following C# code?

static void Main(string[] args)
{
    string s1 = "Hello";
    string s2 = "hello";
    if (s1 == s2)
    Console.WriteLine("Equal");
    else
    Console.WriteLine("Unequal");
    if (s1.Equals (s2))
    Console.WriteLine("Equal");
    else
    Console.WriteLine("Unequal");
    Console.ReadLine();
}

A) Equal
Unequal B) Unequal
Equal C) Equal
Equal D) Unequal
Unequal

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Answer & Solution

Answer: Option D

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29

What will be the output of the following C# code snippet?

static void main(String args[])
{
    char chars[] = {'x', 'y', 'z'};
    String s = new String(chars);
    Console.WriteLine(s);
}

A) x B) xy C) z D) xyz

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Answer & Solution

Answer: Option D

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30

Choose the statements which are false in nature?

A) The base class member functions can access public member functions of derived class B) An object of a derived class cannot access private member of the base class C) Private members of the base class cannot be accessed by derived class member functions or objects of derived class D) None of the mentioned

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Answer & Solution

Answer: Option A

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Arrays and Strings in C Sharp MCQ question and answer with solution | C# Program MCQs