Explore topic-wise MCQs in C Sharp Programming.

This section includes 23 Mcqs, each offering curated multiple-choice questions to sharpen your C Sharp Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

How is a string typically processed?

A. On a character by character basis
B. On a string by string basis
C. Both On a character by character basis & On a string by string basis
D. None of the mentioned
Answer» B. On a string by string basis
Discussion
2.

What is the String in C# meant for?

A. Variable
B. Character Array
C. Object
D. Class
Answer» D. Class
Discussion
3.

The Method use to remove white space from string?

A. Split()
B. Substring()
C. Trim()
D. TrimStart()
Answer» D. TrimStart()
Discussion
4.

Which is the correct way of defining and initializing an array of 3 integers?

A. int[] a={78, 54};
B. int[] a; a = new int[3]; a[1] = 78; a[2] = 9; a[3] = 54;
C. int[] a; a = new int{78, 9, 54};
D. int[] a; a = new int[3]{78, 9, 54};
Answer» E.
Discussion
5.

Correct way to find if contents of two strings are equal ?

A. if (s1 = s2)
B. if (s1 != s2)
C. if (strcmp (s1 ,s2))
D. if ( s1 is s2)
Answer» D. if ( s1 is s2)
Discussion
6.

Choose selective differences between an array in c# and array in other programming languages.

A. Declaring array in C# the square bracket([]) comes after the type but not after identifier
B. It is necessary to declare size of an array with its type
C. No difference between declaration of array in c# as well as as in other programming languages
D. All of the mentioned
Answer» B. It is necessary to declare size of an array with its type
Discussion
7.

Keyword used to define call by reference parameter in C# .NET?

A. &
B. out
C. ref
D. &&
Answer» D. &&
Discussion
8.

Which statement is/are correct?

A. An argument passed to a ref parameter need not to be initialized first
B. Variables passed as out arguments need to be initialized prior to being passed
C. To use a ref parameter, only the calling method must explicitly use the ref keyword
D. None of the mentioned
Answer» E.
Discussion
9.

Select the correct declaration of the defining array of parameters:

A. void func(int[] x) { }
B. void func(int x) { }
C. void func(param int[]) { }
D. void fun(param int[] x) { }
Answer» E.
Discussion
10.

Which of the following is the correct way to obtain the number of elements present in the array given below? int[] intMyArr = {25, 30, 45, 15, 60}; intMyArr.GetMax; intMyArr.Highest(0); intMyArr.GetUpperBound(0); intMyArr.Length; intMyArr.GetMaxElements(0);

A. 1, 2
B. 3, 4
C. 3, 5
D. 1, 5
Answer» C. 3, 5
Discussion
11.

Which of the following statements are correct about arrays used in C#.NET? Arrays can be rectangular or jagged. Rectangular arrays have similar rows stored in adjacent memory locations. Jagged arrays do not have an access to the methods of System.Array Class. Rectangular arrays do not have an access to the methods of System.Array Class. Jagged arrays have dissimilar rows stored in non-adjacent memory locations.

A. 1, 2
B. 1, 3, 5
C. 3, 4
D. 1, 2, 5
Answer» E.
Discussion
12.

Which of the following statements is correct about the array declaration given below? int[][][] intMyArr = new int[2][][];

A. intMyArr refers to a 2-D jagged array containing 2 rows.
B. intMyArr refers to a 2-D jagged array containing 3 rows.
C. intMyArr refers to a 3-D jagged array containing 2 2-D jagged arrays.
D. intMyArr refers to a 3-D jagged array containing three 2-D jagged arrays.
Answer» D. intMyArr refers to a 3-D jagged array containing three 2-D jagged arrays.
Discussion
13.

Which of the following are the correct ways to define an array of 2 rows and 3 columns? int[ , ] a; a = new int[2, 3]{{7, 1, 3},{2, 9, 6}}; int[ , ] a; a = new int[2, 3]{}; int[ , ] a = {{7, 1, 3}, {2, 9,6 }}; int[ , ] a; a = new int[1, 2]; int[ , ] a; a = new int[1, 2]{{7, 1, 3}, {2, 9, 6}};

A. 1, 2 , 3
B. 1, 3
C. 2, 3
D. 2, 4, 5
Answer» C. 2, 3
Discussion
14.

What will be the output of the C#.NET code snippet given below? namespace IndiabixConsoleApplication { class SampleProgram { static void Main(string[ ] args) { int i, j; int[ , ] arr = new int[ 2, 2 ]; for(i = 0; i < 2; ++i) { for(j = 0; j < 2; ++j) { arr[i, j] = i * 17 + i * 17; Console.Write(arr[ i, j ] + " "); } } } } }

A. 0 0 34 34
B. 0 0 17 17
C. 0 0 0 0
D. 17 17 0 0
Answer» B. 0 0 17 17
Discussion
15.

Which of the following is the correct output of the C#.NET code snippet given below? int[][] a = new int[2][]; a[0] = new int[4]{6, 1, 4, 3}; a[1] = new int[3]{9, 2, 7}; Console.WriteLine(a[1].GetUpperBound(0));

A. 3
B. 4
C. 7
D. 9
Answer» E.
Discussion
16.

Which of the following is the correct way to define and initialise an array of 4 integers? int[] a = {25, 30, 40, 5}; int[] a; a = new int[3]; a[0] = 25; a[1] = 30; a[2] = 40; a[3] = 5; int[] a; a = new int{25, 30, 40, 5}; int[] a; a = new int[4]{25, 30, 40, 5}; int[] a; a = new int[4]; a[0] = 25; a[1] = 30; a[2] = 40; a[3] = 5;

A. 1, 2
B. 3, 4
C. 1, 4, 5
D. 2, 4, 5
Answer» D. 2, 4, 5
Discussion
17.

Which of the following statements are correct about the C#.NET code snippet given below? int[][]intMyArr = new int[2][]; intMyArr[0] = new int[4]{6, 1, 4, 3}; intMyArr[1] = new int[3]{9, 2, 7};

A. intMyArr is a reference to a 2-D jagged array.
B. The two rows of the jagged array intMyArr are stored in adjacent memory locations.
C. intMyArr[0] refers to the zeroth 1-D array and intMyArr[1] refers to the first 1-D array.
D. intMyArr refers to intMyArr[0] and intMyArr[1].
Answer» D. intMyArr refers to intMyArr[0] and intMyArr[1].
Discussion
18.

Which of the following statements are correct about the C#.NET code snippet given below? int[] a = {11, 3, 5, 9, 4}; The array elements are created on the stack. Refernce a is created on the stack. The array elements are created on the heap. On declaring the array a new array class is created which is derived from System.Array Class. Whether the array elements are stored in the stack or heap depends upon the size of the array.

A. 1, 2
B. 2, 3, 4
C. 2, 3, 5
D. 4, 5
Answer» C. 2, 3, 5
Discussion
19.

Which of the following statements is correct about the C#.NET code snippet given below? int[] intMyArr = {11, 3, 5, 9, 4};

A. intMyArr is a reference to an object of System.Array Class.
B. intMyArr is a reference to an object of a class that the compiler derives from System.Array Class.
C. intMyArr is a reference to an array of integers.
D. intMyArr is a reference to an object created on the stack.
Answer» C. intMyArr is a reference to an array of integers.
Discussion
20.

Which of the following is the correct output of the C#.NET code snippet given below? int[ , , ] a = new int[ 3, 2, 3 ]; Console.WriteLine(a.Length);

A. 20
B. 4
C. 18
D. 10
Answer» D. 10
Discussion
21.

If a is an array of 5 integers then which of the following is the correct way to increase its size to 10 elements?

A. int[] a = new int[5]; int[] a = new int[10];
B. int[] a = int[5]; int[] a = int[10];
C. int[] a = new int[5]; a.Length = 10 ;
D. int[] a = new int[5]; a = new int[10];
Answer» E.
Discussion
22.

How will you complete the foreach loop in the C#.NET code snippet given below such that it correctly prints all elements of the array a? int[][]a = new int[2][]; a[0] = new int[4]{6, 1 ,4, 3}; a[1] = new int[3]{9, 2, 7}; foreach (int[ ] i in a) { /* Add loop here */ Console.Write(j + " "); Console.WriteLine(); }

A. foreach (int j = 1; j < a(0).GetUpperBound; j++)
B. foreach (int j = 1; j < a.GetUpperBound (0); j++)
C. foreach (int j in a.Length)
D. foreach (int j in i)
Answer» E.
Discussion
23.

Which of the following statements are correct about the C#.NET code snippet given below? int[ , ] intMyArr = {{7, 1, 3}, {2, 9, 6}}; intMyArr represents rectangular array of 2 rows and 3 columns. intMyArr.GetUpperBound(1) will yield 2. intMyArr.Length will yield 24. intMyArr represents 1-D array of 5 integers. intMyArr.GetUpperBound(0) will yield 2.

A. 1, 2
B. 2, 3
C. 2, 5
D. 1, 4
Answer» B. 2, 3
Discussion