gs gs108 Data Types, Variables and Operators - Floating and Decimal Data Types - Quiz No.1
gs gs108 CSharp Quiz
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Question 1: Select a convenient declaration and initialization of a floating point number:
float somevariable = 12.502D
float somevariable = (Double) 12.502D
float somevariable = (float) 12.502D
float somevariable = (Decimal)12.502D
Question 2: Number of digits upto which precision value of float data type is valid?
Upto 6 digit
Upto 8 digit
Upto 9 digit
Upto 7 digit
Question 3: Valid Size of float data type is?
10 Bytes
6 Bytes
4 Bytes
8 Bytes
Question 4: Correct way to define a value 6.28 in a variable ‘pi’ where value cannot be modified?
#define pi 6.28F
pi = 6.28F
const float pi = 6.28F
const float pi pi = 6.28F
Question 5: What will be the correct set of C# code to display the value of given variable ‘c’ as ‘25.302’.
float a = (double) 12.502f; float b = 12.80f; float c; c = (float) a + b; Console.Writeline(c); Console.ReadLine(); float a = 12.502D; float b = 12.80f; float c; c = a + b; Console.WriteLine(c); Console.ReadLine(); double a = 12.502; float b = 12.802f; float c; c = (float)a + b; Console.WriteLine(c); Console.ReadLine(); double a = (float) 12.502f; float b = 12.80f; float c; c = a + b; Console.WriteLine(c); Console.ReadLine();
Question 6: Minimum and Maximum range of values supported by ‘float’ data type are?
1.5 * 10-40 to 3.4 * 1038
1.5 * 10-45 to 3.4 * 1030
1.5 * 10-45 to 3.4 * 1038
1.5 * 10-45 to 3.4 * 1037
Question 8: 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; }
Sign and Exponent for ‘16777217’ is same as for ‘16777216’
Mantissa is different for ‘16777216’ and ‘16777217’
Sign and Exponent for ‘16777217’ is different from ‘16777216’
None of the mentioned
Question 10: 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?
ABCD
DCBA
0 * ABCD
Depends on big endian or little endian architecture
