All Flashcards
How is casting applied in real-world scenarios?
Converting sensor data (e.g., temperature) from double to int for display or storage.
How are integer ranges applied in real-world scenarios?
Ensuring user input (e.g., age) is within valid bounds.
How is rounding with casting applied in real-world scenarios?
Calculating the number of whole items to produce based on a fractional calculation.
How is data type conversion used in financial calculations?
Converting currency values between different formats (e.g., double to int for cents) for accurate accounting.
How is explicit casting used in embedded systems?
Converting sensor readings (e.g., analog-to-digital converter values) to specific data types required by hardware interfaces.
How are integer ranges used in database management?
Defining the maximum and minimum values for integer fields (e.g., primary keys) to optimize storage and prevent overflow.
How is rounding with casting used in game development?
Converting floating-point coordinates to integer pixel positions for rendering objects on the screen.
What are the steps to round a positive double to the nearest integer using casting?
- Add 0.5 to the double. 2. Cast the result to an int.
What are the steps to round a negative double to the nearest integer using casting?
- Subtract 0.5 from the double. 2. Cast the result to an int.
What are the steps to convert from double to int?
- Use explicit casting: (int) doubleValue.
What are the steps to calculate the average of three doubles and round it to the nearest integer?
- Calculate the average: (num1 + num2 + num3) / 3.0. 2. Add 0.5 to the average. 3. Cast the result to an int.
What are the steps to handle potential integer overflow?
- Check if the result exceeds Integer.MAX_VALUE or Integer.MIN_VALUE. 2. If it does, handle the overflow appropriately (e.g., throw an exception or use a larger data type).
What are the differences between widening and narrowing conversions?
Widening: Automatic, no data loss. Narrowing: Manual, potential data loss.
What are the differences between casting and rounding?
Casting: Truncates the decimal part. Rounding: Adjusts the value to the nearest integer.
What are the differences between explicit and implicit casting?
Explicit: Requires manual cast operator. Implicit: Performed automatically by the compiler.