gs gs108 Data Types, Variables and Operators - Scope and Lifetime of Variables - Quiz No.1
gs gs108 CSharp Quiz
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Question 1: Choose the correct type of variable scope for the following C# defined variables.
class ABC { static int m; int n; void fun (int x , ref int y, out int z, int[] a) { int j = 10; } }
m = static variable, n = local variable, x = output parameter, y = reference parameter, j = instance variable, z = output parameter, a[0] = array element
m = static variable, n = instance variable, x = value parameter, y = reference parameter, j = local variable, z = output parameter , a[0] = array element
m = static variable, n = instance variable, x = reference parameter, y = value parameter, j = local variable, z = output parameter, a[0] = array element
m = local variable, n = instance variable, x = reference parameter, y = value parameter, j = static variable, z = output parameter, a[0] = array element
Question 2: What will be the output of the following C# code?
class Program { static void Main(string[] args) { int i ; for (i = 0; i < 5; i++) { Console.WriteLine(i); } Console.ReadLine(); } }
0, 1, 2, 3, 4, 5
0, 1, 2, 3
0, 1, 2, 3, 4
0, 0, 0, 0, 0
Question 4: What will be the output of the following C# code?
class Program { static void Main(string[] args) { int i ; for ( i = 0; i < 5; i++) { int j = 0; j += i; Console. WriteLine(j); } Console. WriteLine(i); Console. ReadLine(); } }
0, 1, 2, 3, 4, 5, 6
0, 1, 2, 3, 4, 5
0, 1, 2, 3, 4
0, 1, 2, 3
Question 5: What will be the output of the following C# code?
static void Main(string[] args) { int i ; for (i = 0; i < 5; i++) { int j = 0; j += i; Console. WriteLine(j); } Console. WriteLine( i * j); Console. ReadLine(); }
0, 1, 6, 18, 40
0, 1, 5, 20, 30
Compile time error
0, 1, 2, 3, 4, 5
Question 7: What will be the output of the following C# code?
class Program { public static void Main(string[] args) { int i = 100; for (a = 0; a < 5; a++) { int i = 200; Console. WriteLine(a * i); } Console. ReadLine(); } }
5, 10, 15, 20
0, 5, 10, 20
Compile time error
0, 1, 2, 3, 4
Question 8: Syntax for declaration and initialization of data variable is?
<data type><var_name> = <Value>;
<data type><var_name>;
<var_name><data type>;
<var_name> = <value>;
Question 10: Choose effective differences between 'Boxing' and 'Unboxing'.
'Boxing' is the process of converting a value type to the reference type and 'Unboxing' is the process of converting reference to value type
'Boxing' is the process of converting a reference type to value type and 'Unboxing' is the process of converting value type to reference type
In 'Boxing' we need explicit conversion and in 'Unboxing' we need implicit conversion
Both 'Boxing' and 'Unboxing' we need implicit conversion
