Following code will result in: int a1 = 5; double a2 = (float)a1;
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Compilation error
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Runtime error
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Runtime exception
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No error
Casting an int value to float and then assigning it to a double is fully legal. The widening conversions (int to float, float to double) occur implicitly or explicitly without data loss, resulting in no compilation or runtime errors.
To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) Compilation error - This option is incorrect. The given code will not result in a compilation error because it follows valid syntax. The code initializes an integer variable a1 with the value 5 and then assigns its value to a double variable a2 after performing a type cast.
Option B) Runtime error - This option is incorrect. The given code will not result in a runtime error because there is no invalid operation or division by zero involved. The code simply performs a type cast from an integer to a double.
Option C) Runtime exception - This option is incorrect. The given code will not result in a runtime exception because there is no exceptional condition or error that would cause the program to terminate abruptly.
Option D) No error - This option is correct. The given code will execute without any error. It initializes an integer variable a1 with the value 5 and then assigns its value to a double variable a2 after performing a type cast.
The correct answer is D. No error. This option is correct because the code will compile and execute without any errors or exceptions.