Integer types and their ranges in C Sharp (C#) - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of integer overflow in C#

What is the output of the following C# code snippet?

C Sharp (C#)

checked
{
    byte b = 255;
    b = (byte)(b + 1);
    Console.WriteLine(b);
}

A OverflowException

B 255

C 0

D 256

💡 Hint

The checked block throws an exception on overflow.

The byte type can hold values from 0 to 255. Adding 1 causes an overflow. The checked block causes an OverflowException to be thrown.

❓ Predict Output

intermediate

Range of Int16 type

What is the output of this C# code?

C Sharp (C#)

short min = short.MinValue;
short max = short.MaxValue;
Console.WriteLine($"{min} {max}");

A -65536 65535

B -32767 32768

C -32768 32767

D -128 127

💡 Hint

Short is a 16-bit signed integer.

The Int16 (short) type ranges from -32768 to 32767.

❓ Predict Output

advanced

Unsigned integer max value output

What does this C# code print?

C Sharp (C#)

uint max = uint.MaxValue;
Console.WriteLine(max);

A 4294967295

B -1

C 2147483647

D 0

💡 Hint

uint is a 32-bit unsigned integer.

The uint type ranges from 0 to 4294967295. MaxValue is 4294967295.

❓ Predict Output

advanced

Behavior of integer underflow in unchecked context

What is the output of this C# code?

C Sharp (C#)

unchecked
{
    int min = int.MinValue;
    int result = min - 1;
    Console.WriteLine(result);
}

A OverflowException

B -2147483649

C -2147483648

D 2147483647

💡 Hint

Unchecked context allows silent overflow/underflow.

int.MinValue is -2147483648. Subtracting 1 causes underflow and wraps around to 2147483647 in unchecked context.

🧠 Conceptual

expert

Size and range of long type in C#

Which of the following correctly describes the size and range of the C# long type?

A 32-bit signed integer ranging from -2,147,483,648 to 2,147,483,647

B 64-bit signed integer ranging from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807

C 64-bit unsigned integer ranging from 0 to 18,446,744,073,709,551,615

D 16-bit signed integer ranging from -32,768 to 32,767

💡 Hint

long is a 64-bit signed integer in C#.

The long type in C# is a 64-bit signed integer with the specified range.