Q12

What is the difference between an input stream and an output stream?

An input stream reads data from a file or console and sends it to a program. An output stream takes data from a program and writes it to a file or console.

What is an exception?

An object that signals the occurrence of an unusual event.

Which Java class is the preferred class to use for writing to a text file?

PrintWriter

Which Java class is the preferred class to use for reading from a text file?

Scanner

What happens if an exception is thrown by a statement inside a try block?

The remainder of the try block is skipped and then the code in the catch block is executed.

A statement opening a text file for reading or writing may generate a FileNotFoundException. T or F?

True

A try block must have a corresponding catch block. T or F?

True

Data in a file remains after program execution ends. T or F?

True

Java provides several predefined exception classes. T or F?

True

Which of the following is the correct way to open a text file called "myfile.txt" for reading?

inputStream = new Scanner(new File("myfile.txt"));

Which of the following statements opens a text file called "myfile.txt" so that new text can be appended to the existing contents of the file?

outputStream = new PrintWriter(new FileOutputStream("myfile.txt", true));

If the statement data.saveToFile() throws a FileNotFoundException, which of the following is the correct way to handle this?

try{ // some code data.saveToFile(); // more code } catch (FileNotFoundException e) { // code to handle FileNotFoundException }