C# Programming Questions and Answers
Correct Declaration of Values to variables ‘a’ and ‘b’?
a) Although,declaration of ‘b’ and ‘a’ are correct but initialization of value to ‘b’ should be ‘int’ datatype not float.
b) Missing declaration type of ‘b’.
c) correctly declared datatypes ‘a’ and ‘b’.
d) ‘b’ can’t be assigned values before declaration.
Select error in the given program :
1.
static Void Main(String[] args)
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{
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constint m =100;
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int n =10;
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constint k = n /5*100* n ;
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Console.WriteLine(m * k);
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Console.ReadLine();
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}
’k’ should be declared as const int k = 10/5 * 100*10 i.e only constant values should be assigned to a constant.
Output :Error 1 – The expression being assigned to ‘k’ must be constant.
Correct output for code is?
1.
staticvoid Main(string[] args)
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{
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float a = 10.553f;
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long b = 12L;
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int c;
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c = Convert.ToInt32(a + b);
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Console.WriteLine(c);
8.
}
The two datatype ‘float’ and ‘long’ after arithmetic operation completely converted to nearest whole number 23.
Output : 23.
How many Bytes are stored by ‘Long’ Datatype in C# .net?
‘Long’ is the datatype keyword used for storing data of unlimited length so by definition its size is always maximum i.e 8.
Which Conversion function of ‘Convert.TOInt32()’ and ‘Int32.Parse()’ is efficient?
1) Int32.Parse() is only used for strings and throws argument exception for null string
2) Convert.Int32() used for datatypes and returns directly ‘0’ for null string
Convenient for every datatype so mostly preferred
