AOOP UNIT-5 Test

A Collection is a group of individual objects represented as a _________unit

• Single

• Multiple

• Combined

• Divided

Which of these is an Interface

• ArrayList

• vector

• List

• LinkedList

Which of these packages contain all the collection classes?

• java.lang

• java.util

• java.net

• java.awt

If your frequent operation is ________ who is the worst choice

• HashMap

• HashSet

• ArrayList

• LinkedList

Which of the following class is not related to input and output stream in terms of functioning?

• File

• FileReader

• FileWriter

• InputStream

Which of these values is returned by read() method is end of file (EOF) is encountered?

• 0

• 1

• -1

• Null

Which of these methods is used to write() into a file?

• put()

• putFile()

• write()

• writeFile()

Which of the following packages contain classes and interfaces used for input & output operations of file?

• 
  java.util

•  java.io

• java.lang

• java.net

What will be the output of the following code?

import java.io.*; class demoFile { public static void main(String args[]) { File f = new File("C:/java/xyz"); System.out.print(f.getName()); } }

• java

• java/xyz

• xyz

• C:/java/xyz

Which of these class is not a member class of java.io package?

• FileReader

• FileWriter

• File

• String