QUESTION 1

What is returned by the read method when a FileInputStream has reached the end of the file?

		-1
		-2
		0

1 points

QUESTION 2

The two IO classes used for serialization are _______ and ________.

		Reader, Writer
		ObjectInputStream, ObjectOutputStream
		Scanner, PrintWriter
		FileReader, FileWriter

1 points

QUESTION 3

In Java, you use a(n) ____________ object to access a file and move its file pointer.

		Stream
		Serializable
		SequentialAccessFile
		RandomAccessFile

1 points

QUESTION 4

What type is returned from a call to the ObjectInputStream.readObject method when reading a String from an object stream?

		Object
		String
		char
		ObjectStream

1 points

QUESTION 5

If serializing object obj requires 12 bytes, how many bytes are required to serialize obj 3 times?

		12 bytes plus 3 serial numbers of obj
		36 bytes
		12 bytes
		12 bytes plus 2 serial numbers of obj

1 points

QUESTION 6

Which code stores an array buttonArray of JButton objects in a file named buttonFile? We ignore exceptions in this problem.

		ObjectStream os = new ObjectStream(new FileStream("buttonFile"); os.writeObject(buttonArray);
		ObjectOutputStream oos = new ObjectOutputStream( new FileOutputStream("buttonFile"); oos.writeObject(buttonArray);
		ObjectOutputStream oos = new ObjectOutputStream( new FileOutputStream("buttonFile"); oos.writeObject(buttonArray[0]);
		ObjectOutputStream oos = new ObjectOutputStream("buttonFile"); oos.writeObject(buttonArray);

1 points

QUESTION 7

How many bytes does the read method in the InputStream class actually return to the program call?

		1
		2
		4
		8

1 points

QUESTION 8

Which is not a method available in the RandomAccessFile class?

		open
		readInt
		readDouble
		close

1 points

QUESTION 9

Which file storage method stores data in bytes?

		binary
		object
		text
		byte

1 points

QUESTION 10

When constructing a Scanner from a File object, the Scanner automatically constructs a ___________.

		InputStream
		FileInputStream
		FileReader
		PrintWriter

1 points

QUESTION 11

The ______ method returns an integer, either -1 (at the end of the file) or a byte between 0 and 255.

		RandomAccessFile.seek
		InputStream.read
		Scanner.next
		Reader.length

1 points

QUESTION 12

How many bytes does the read method in the FileInputStream class actually return to the program call?

		1
		2
		4
		8

1 points

QUESTION 13

In which package are most classes for file processing found?

		java.file
		java.inputoutput
		java.io
		java.stream

1 points

QUESTION 14

What is the lowest value for a signed (negative and positive) byte?

		-127
		-128
		-255
		-256

1 points

QUESTION 15

Why does FileInputStream override the read method from its superclass InputStream?

		In order to return a char.
		In order to read binary data.
		To read data from a file.
		To check for end of file.

1 points

QUESTION 16

Caesar cipher uses a shift of each character by a key with a value between 1 and 255. An a with a shift equal to 3 becomes a d. A z would become a c, wrapping around the alphabet.Which is the decryption of exmmv for a key = -3?

		cvkkt
		atiir
		bujjs
		happy

1 points

QUESTION 17

Which of the following classes are related through inheritance?

I InputStream

II InputStreamReader

III ObjectInputStream

		I and II
		I and III
		II and III
		I, II and III

1 points

QUESTION 18

Which method in the RandomAccessFile class provides for random access?

		move
		seek
		goto
		offset

1 points

QUESTION 19

Which of the following reads binary data from a disk file?

		PrintWriter text = new PrintWriter("input.bin");
		FileReader text = new FileReader("input.bin");
		FileInputStream inputStream = new FileInputStream("input.bin");
		FileWriter text = new FileWriter("input.bin");

1 points

QUESTION 20

Which interface allows classes to be written to an ObjectOutputStream?

		Objective
		Streaming
		Serializable
		Objectifiable