Solution

The correct answer is C, E, B, A, D.

Key Points

• Implicit type conversion, also known as type promotion, occurs automatically by the compiler when a lower data type is converted to a higher data type.
• The hierarchy for type conversion follows the data type size and precision. Smaller data types are promoted to larger data types for compatibility and precision.
• The correct order of data types from lower size to higher size for implicit conversion is: unsigned int → long int → unsigned long int → double → long double.
• This ensures no data loss occurs during the conversion process.

Additional Information

• Details of the data types:
  • unsigned int: A 4-byte data type (on most systems) that stores only positive integers.
  • long int: A 4-byte or 8-byte data type (depending on the system) capable of storing larger integers compared to int.
  • unsigned long int: A 4-byte or 8-byte data type for larger positive integer values.
  • double: An 8-byte floating-point data type used to store decimal numbers with double precision.
  • long double: A 10-byte or 16-byte floating-point data type (depending on the system) used for extended precision decimal numbers.
• Why implicit conversion is necessary:
  • It ensures that operations involving different data types are performed accurately and without data loss.
  • For example, adding an integer to a floating-point number promotes the integer to a floating-point number before the operation.
• Important Points:
  • Implicit conversion follows a strict hierarchy to prevent loss of information.
  • When precision and size differ, the data type with higher precision or size is chosen for promotion.
  • Explicit typecasting can be used if implicit conversion does not meet the desired outcome.