gs gs108 Delegates, Generics and LINQ - Introduction of Array Class - Quiz No.1
gs gs108 CSharp Quiz
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Question 1: Select the class which is the base class for all arrays in C#?
Array
Text
arrays
Both Array & Text
Question 2: Select the interfaces implemented by array class.
ICloneable, ICollection
IEnumerable, IStructuralComparable, IStructuralEquatable
ICloneable, ICollection, IList
Only IEnumerable, IStructuralComparable, IStructuralEquatable & ICloneable, ICollection, IList
Question 3: Choose the correct statement about the IComparer interface in C#?
The IComparer interface is in System.Collections
It defines a method called Compare(), which compares the values of two objects
Both The IComparer interface is in System.Collections & It defines a method called Compare(), which compares the values of two objects
None of the mentioned
Question 4: Choose the correct statement about the IComparer<T> interface in C#?
The IComparer<T> is in System.Collections.Generic
It defines a generic form of Compare()
Only The IComparer<T> is in System.Collections.Generic
Both The IComparer is in System.Collections.Generic & It defines a generic form of Compare()
Question 5: What does the following property defined in the array class defines in C#?
public bool IsReadOnly { get; }
a property is read only by nature
property is true if the array object is read only and false otherwise
value is false for arrays
all of the mentioned
Question 6: What does the following property define in C#?
public static int BinarySearch<T>(T[] array, int index, int length, T value)
Searches a portion of the array specified by array for the value specified by value
The search begins at the index specified by index and is restricted to length elements. Returns the index of the first match
If value is not found, returns a zero value
All of the mentioned
Question 7: What will be the output of the following C# code snippet?
static void Main(string[] args) { int[] nums = { 5, 4, 6, 3, 14, 9, 8, 17, 1, 24, -1, 0 }; Array.Sort(nums); int idx = Array.BinarySearch(nums, 14); if (idx == 9) { Console.WriteLine(Convert.ToBoolean(1)); } else { Console.WriteLine(Convert.ToBoolean(0)); } Console.WriteLine("Index of 14 is " + idx); Console.ReadLine(); } True 0
Run time error
True 9
None of the mentioned
Question 8: What will be the output of the following C# code snippet?
static void Main(string[] args) { string[] strings = {"beta", "alpha", "gamma"}; Console.WriteLine("Array elements: "); DisplayArray(strings); Array.Reverse(strings); Console.WriteLine("Array elements now: "); DisplayArray(strings); Console.ReadLine(); } public static void DisplayArray(Array array) { foreach (object o in array) { Console.Write("{0} ", o); } Console.WriteLine(); } Array elements: beta alpha gamma Array elements now: ammag ahpla ateb Array elements: beta alpha gamma Array elements now: gamma beta alpha Array elements: beta alpha gamma Array elements now: gamma alpha beta
None of the mentioned
Question 9: Which among the following is the wrong way to define and initialize 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[4]{25, 30, 40, 5} int[] a a = new int[4] a[0] = 25 a[1] = 30 a[2] = 40 a[3] = 5
Question 10: Which method will be used to copy content from one array to another array?
Copy()
copy()
Both Copy() & copy()
None of the mentioned
