C# Data Types Test - Sanfoundry

1. Which data type should be more preferred for storing a simple number like 35 to improve execution speed of a program?

sbyte

long

short

int

2. 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

None of the mentioned

Both i, ii

3. How many Bytes are stored by 'Long' Data type in C# .net?

4. What will be Correct Set of C# Code for given data 'a' and 'b' to print output for 'c' as 74?

    int a = 12;
    float b = 6.2f;
    int c;
    c = convert.ToInt32(a / b + a * b);
    Console.WriteLine(c);

   int a = 12;
   float b = 6.2f;
   int c;
   c = a / b + a * b;
   Console.WriteLine(c);

   int a = 12;
   float b = 6.2f;
   int c;
   c = a / convert.ToInt32(b) + a * convert.ToInt32(b);
   Console.WriteLine(c);

   int a = 12;
   float b = 6.2f;
   int c;
   c = a / convert.ToInt32(b) + a * b;
   Console.WriteLine(c);

5. What will be the error in the following C# code?

 Static Void Main(String[] args)
 {
     const int m = 100;
     int n = 10;
     const int k = n / 5 * 100 * n ;
     Console.WriteLine(m * k);
     Console.ReadLine();
 }

Expression (m * k) is invalid

'm ' is declared in invalid format

Expression assigned to 'k' should be constant in nature

'k' should not be declared constant

6. Does the output remain same or different for both cases?
i)

  char l ='k';
  float b = 19.0f;
  int c;
  c = (l / convert.ToInt32(b));
  Console.Writeline(c);

ii)

   char l ='k';
   float b = 19.0f;
   int c;
   c = Convert.ToInt32(l / b);
   console.writeline(c);

Yes

7. Correct way to assign values to variable 'c' when int a=12, float b=3.5, int c;

c = a + convert.ToInt32(b);

c = a + b;

c = int(a + b);

c = a + int(float(b));

8. Correct Declaration of Values to variables 'a' and 'b'?

int a = 42; b = 40;

int a = 32; int b = 40;

int a = b = 42;

int a = 32, b = 40.6;

9. Default Type of number without decimal is?

Int

Unsigned Long

Unsigned Int

Long Int

10. Choose ".NET class" name from which data type "UInt" is derived?

System.UInt64

System.UInt32

System.Int16

System.UInt16

11. Arrange the following data type in order of increasing magnitude sbyte, short, long, int.

short < sbyte < int < long

long < short < int < sbyte

sbyte < short < int < long

short < int < sbyte < long

12. 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);
 }

22.453

23.453