Online Test | Technical MCQ Test

Choose “.NET class” name from which data type “UInt” is derived?

Which Conversion function of ‘Convert.TOInt32()’ and ‘Int32.Parse()’ is efficient?

i) Int32.Parse() is only used for strings and throws argument exception for null string

ii) Convert.Int32() used for data types and returns directly '0' for null string

Correct Declaration of Values to variables ‘a’ and ‘b’?

 How many Bytes are stored by ‘Long’ Data type in C# .net?

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

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

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

static void Main(string[] args)
{
int a = 5;
int b = 10;
int c;
Console.WriteLine(c = a-- - ++b);
Console.WriteLine(b);
Console.ReadLine();
}

The following C# codes are?

i) Myclass class;

Myclass class2 = null;

ii) int i;

int j = 0;

Minimum and Maximum range of values supported by ‘float’ data type are?

Valid Size of float data type is?

Correct way to define a value 6.28 in a variable ‘pi’ where value cannot be modified?

Why does a float variable stop incrementing at number ‘16777216’ in the following C# code?

float a = 0 ;
while (true)
{
a++;
if (a > 16777216)
break;
}

The Default value of Boolean Data Type is?

Default Type of number without decimal is?

Why strings are of reference type in C#.NET?

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();
}

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

class Program
{
public static void Main(string[] args)
{
int i, j;
i = (j = 5) + 10;
Console. WriteLine(i);
Console. WriteLine(j);
Console. ReadLine();
}
}

Select differences between reference type and value type:

i. Memory allocated to ‘Value type’ is from heap and reference type is from ‘System. ValueType’
ii. Memory allocated to ‘Value type’ is from ‘System. ValueType’ and reference type is from ‘Heap’
iii. Structures, enumerated types derived from ‘System. ValueType’ are created on stack, hence known as ValueType and all ‘classes’ are reference type because values are stored on heap

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

public static void Main(string[] args)
{
int i = 123;
object o = i;
i = 456;
System. Console. WriteLine("The value-type value = {0}", i);
System. Console. WriteLine("The object-type value = {0}", o);
Console. ReadLine();
}

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();
}
}

Choose the correct type of variable scope for the following C# defined variables.

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

public static void Main(string[] args)
{
int i = 546;
object o = i;
int n =(int) o;
o = 70;
System. Console. WriteLine("The value-type value = {0}", n);
System. Console. WriteLine("The object-type value = {0}", o);
Console. ReadLine();
}

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

static void Main(string[] args)
{
int x = 1;
float y = 2. 4f;
short z = 1;
Console. WriteLine((float) x + y * z - (x + = (short) y) );
Console. ReadLine();
}

Select a convenient declaration and initialization of a floating point number

A float occupies 4 bytes. If the hexadecimal equivalent of these 4 bytes are A, B, C and D, then when this float is stored in memory in which of the following order do these bytes gets stored?

The Default value of Boolean Data Type is?

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

static void Main(string[] args)
{
float a = 10.553f;
long b = 12L;
int c;
c = Convert.ToInt32(a + b);
Console.WriteLine(c);
}

Which Conversion function of ‘Convert.TOInt32()’ and ‘Int32.Parse()’ is efficient?

i) Int32.Parse() is only used for strings and throws argument exception for null string

ii) Convert.Int32() used for data types and returns directly '0' for null string

What will be the output of the following C# string? (Enter a String : BOMBAY).

static void Main(string[] args)
{
string Str, Revstr = " ";
int Length;
Console.Write("Enter A String : ");
Str = Console.ReadLine();
Length = Str.Length - 1;
while (Length >= 0)
{
Revstr = Revstr + Str[Length];
Length --;
}
Console.WriteLine("Reverse String Is {0}", Revstr);
Console.ReadLine();
}

Correct statement about strings are?

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

static void Main(string[] args)
{
string s1 = "Delhi";
string s2;
s2 = s1.Insert (6, "Jaipur");
Console.WriteLine(s2);
}

Given is the code of days(example:”MTWTFSS”) which I need to split and hence create a list of days of week in strings( example:”Monday”, “Tuesday”, “Wednesday”, “Thursday”, “Friday”, “Saturday”, “Sunday”). A set of code is given for this purpose but there is the error occurring in that set of code related to the conversion of char to strings. Hence, Select a C# code to solve the given error.

static void Main(string[] args)
{
var days = "MTWTFSS";
var daysArray = days.ToCharArray().Cast<string>().ToArray();
for (var i = 0; i < daysArray.Length; i++)
{
switch (daysArray[i])
{
case "M":
daysArray[i] = "Monday";
break;
case "T":
daysArray[i] = "Tuesday";
break;
case "W":
daysArray[i] = "Wednesday";
break;
case "R":
daysArray[i] = "Thursday";
break;
case "F":
daysArray[i] = "Friday";
break;
case "S":
daysArray[i] = "Saturday";
break;
case "U":
daysArray[i] = "Sunday";
break;
}
}
daysArray[daysArray.Length - 1] = "and " + daysArray[daysArray.Length - 1];
Console.WriteLine(string.Join(", ", daysArray));
}

What is the Size of ‘Char’ datatype?

For two strings s1 and s2 to be equal, which is the correct way to find if the contents of two strings are equal?

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

static void Main(string[] args)
{
int a = 5;
int b = 10;
int c;
Console.WriteLine(c = a-- - ++b);
Console.WriteLine(b);
Console.ReadLine();
}

DIFFERENCE BETWEEN KEYWORDS ‘VAR’ AND ‘DYNAMIC’?

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

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

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

static void Main(string[] args)
{
String name = "Dr.Gupta";
Console.WriteLine("Good Morning" + name);
}

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

int a,b;

a = (b = 10) + 5;

What will be the output of the following C# string? (Enter a String : BOMBAY).

static void Main(string[] args)
{
string Str, Revstr = " ";
int Length;
Console.Write("Enter A String : ");
Str = Console.ReadLine();
Length = Str.Length - 1;
while (Length >= 0)
{
Revstr = Revstr + Str[Length];
Length --;
}
Console.WriteLine("Reverse String Is {0}", Revstr);
Console.ReadLine();
}

Verbatim string literal is better used for?

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

static void Main(string[] args)
{
string s1 = "Delhi";
string s2;
s2 = s1.Insert (6, "Jaipur");
Console.WriteLine(s2);
}

Which is the String method used to compare two strings with each other?

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

static void Main(string[] args)
{
char c = 'g';
string s = c.ToString();
string s1 = "I am a human being" + c;
Console.WriteLine(s1);
Console.ReadLine();
}

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

string s1 = " I AM BEST ";
string s2;
s2 = s1.substring (5, 4);
Console.WriteLine (s2);

Storage location used by computer memory to store data for usage by an application is?

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

static void Main(string[] args)
{
int a = 5;
int b = 10;
int c;
Console.WriteLine(c = a-- - ++b);
Console.WriteLine(b);
Console.ReadLine();
}

A float occupies 4 bytes. If the hexadecimal equivalent of these 4 bytes are A, B, C and D, then when this float is stored in memory in which of the following order do these bytes gets stored?

Select a convenient declaration and initialization of a floating point number

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

static void Main(string[] args)
{
int x = 1;
float y = 2. 4f;
short z = 1;
Console. WriteLine((float) x + y * z - (x + = (short) y) );
Console. ReadLine();
}

The Default value of Boolean Data Type is?

Select differences between reference type and value type:

i. Memory allocated to ‘Value type’ is from heap and reference type is from ‘System. ValueType’
ii. Memory allocated to ‘Value type’ is from ‘System. ValueType’ and reference type is from ‘Heap’
iii. Structures, enumerated types derived from ‘System. ValueType’ are created on stack, hence known as ValueType and all ‘classes’ are reference type because values are stored on heap

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();
}
}

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();
}
}

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();
}

Choose effective differences between ‘Boxing’ and ‘Unboxing’.

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

public static void Main(string[] args)
{
int i = 123;
object o = i;
i = 456;
System. Console. WriteLine("The value-type value = {0}", i);
System. Console. WriteLine("The object-type value = {0}", o);
Console. ReadLine();
}

Choose “.NET class” name from which data type “UInt” is derived?

Correct Declaration of Values to variables ‘a’ and ‘b’?