MODULE 2: I/O Operations

Question 1

In Java, I/O is based on ______

Answer 1

Streams

Question 2

A _____ is a sequence of data elements that can be written sequentially

Answer 2

Stream

Question 3

Used for reading data from a source

Answer 3

InputStream

Question 4

Used for writing data to a destination

Answer 4

OutputStream

Question 5

Used to read characters from the keyboard or any other standard input device

Answer 5

System.in or Standard Input System

Question 6

Used to produce the result of a program on an output device

Answer 6

System.out or Standard output system

Question 7

This is the easiest of all methods as this is similar to printf in C. It can also take multiple arguments

Answer 7

printf()

Question 8

used to output all the error data that a program might throw

Answer 8

System.err or Standard error stream

Question 9

They are commonly used for reading and writing text files

Answer 9

readers and writers

Question 10

Streams are ______ while readers/writers are _______

Answer 10

byte-oriented, character-oriented

Question 11

The Java API which provides a number of classes that you will use to work with files

Answer 11

import.java.io*;

Question 12

What are the three method of getting an input:

Answer 12

1. BufferedReader Class
2. Scanner Class
3. JOptionPane Class

Question 13

Designed to read input from a source (System.in) and it provides methods that you can use to retrieve the input formatted as primitive values or strings

Answer 13

Scanner Method

Question 14

Retrieves the next line of the data and returns it as a string

Answer 14

nextLine();

Question 15

Allows you to quickly display a dialog box

Answer 15

JOptionPane class