Java/Java Mcq Question Set 5 Sample Test,Sample questions

Question:
What is Collection in Java?

1.A group of classes

2.A group of objects

3.A group of interfaces

4.None


Question:
Which exception is thrown by read() method?

1.SystemInputException

2.SystemException

3.InterruptedException

4.IOException


Question:
Which of the following statement is correct?

1.replace() method replaces last occurrence of a character in invoking string with another character.

2.replace() method replaces first occurrence of a character in invoking string with another character.

3.reverseall() method reverses all characters.

4.reverse() method reverses all characters.


Question:
Which of these class can be used to implement input stream that uses a character array as the source?

1.FileReader

2.CharArrayReader

3.BufferedReader

4.FileArrayReader


Question:
Which of these class contains the methods print() & println()?

1.System.out

2.System

3.PrintStream

4.BUfferedOutputStream


Question:
Which of these class is implemented by FilterInputStream class?

1.BufferedInputStream

2.FileInputStream

3.BufferedFileInputStream

4.InputStream


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

1.Writer

2.String

3.File

4.StringReader


Question:
Which of these class is not related to input and output stream in terms of functioning?

1.File

2.Writer

3.Reader

4.InputStream


Question:
Which of these class is used to create an object whose character sequence is mutable?

1.StringBuffer()

2.String()

3.Both of the mentioned

4.None


Question:
Which of these class is used to read and write bytes in a file?

1.InputStreamReader

2.FileInputStream

3.FileWriter

4.FileReader


Question:
Which of these class is used to read characters and strings in Java from console?

1.StringReader

2.BufferedReader

3.InputStreamReader

4.BufferedStreamReader


Question:
Which of these class is used to read characters in a file?

1.FileWriter

2.FileReader

3.FileInputStream

4.InputStreamReader


Question:
Which of these class is used to read from byte array?

1.BufferedInputStream

2.ArrayInputStream

3.ByteArrayInputStream

4.InputStream


Question:
Which of these classes are used by Byte streams for input and output operation?

1.InputOutputStream

2.InputStream

3.Reader

4.All of the above


Question:
Which of these classes are used by Byte streams for input and output operation?

1.InputStream

2.InputOutputStream

3.Reader

4.All of the above


Question:
Which of these classes are used by character streams for input and output operations?

1.Writer

2.InputStream

3.InputOutputStream

4.ReadStream


Question:
Which of these classes are used by character streams output operations?

1.Writer

2.InputStream

3.ReadStream

4.InputOutputStream


Question:
Which of these classes can return more than one character to be returned to input stream?

1.PushbachReader

2.BufferedReader

3.CharArrayReader

4.Bufferedwriter


Question:
Which of these classes is not part of Java's collection framework?

1.Stack

2.Queue

3.Array

4.Maps


Question:
Which of these classes is used for input and output operation when working with bytes?

1.Reader

2.InputStream

3.Writer

4.All of the above


Question:
Which of these data type is returned by every method of OutputStream?

1.float

2.int

3.byte

4.None of these


Question:
Which of these interface declares core method that all collections will have?

1.Comparator

2.Collection

3.EventListner

4.set


Question:
Which of these interface handle sequences?

1.List

2.Set

3.Collection

4.Comparator


Question:
Which of these interface is not a member of java.io package?

1.ObjectFilter

2.DataInput

3.FileFilter

4.ObjectInput


Question:
Which of these interface is not a part of Java's collection framework?

1.Set

2.List

3.SortedList

4.SortedMap


Question:
Which of these interface is not a part of Java's collection framework?

1.Set

2.List

3.SortedList

4.SortedMap


Question:
Which of these interface must contain a unique element?

1.Set

2.List

3.Collection

4.Array


Question:
Which of these is a method to clear all the data present in output buffers?

1.flush()

2.clear()

3.close()

4.fflush()


Question:
Which of these is a method to clear all the data present in output buffers?

1.close()

2.clear()

3.fflush()

4.flush()


Question:
Which of these is a type of stream in Java?

1.Short stream

2.Integer stream

3.Long stream

4.Byte stream


Question:
Which of these is an incorrect form of using method max() to obtain maximum element?

1.max(Collection c)

2.max(Comparator comp)

3.max(List c)

4.max(Collection c, Comparator comp)


Question:
Which of these is Basic interface that all other interface inherits?

1.Array

2.Set

3.Collection

4.List


Question:
Which of these is method for testing whether the specified element is a file or a directory?

1.Isfile()

2.isfile()

3.IsFile()

4.isFile()


Question:
Which of these is method is used for writing bytes to an outputstream?

1.print()

2.put()

3.printf()

4.write()


Question:
Which of these is specified by a File object?

1.directory path

2.directory in disk

3.a file in disk

4.None


Question:
Which of these is static variable defined in Collections?

1.EMPTY_SET

2.EMPTY_LIST

3.EMPTY_MAP

4.All of the above


Question:
Which of these is true about unmodifiableCollection() method?

1.unmodifiableCollection() method is available only for List and Set.

2.unmodifiableCollection() returns a collection that cannot be modified.

3.unmodifiableCollection() is defined in Collection class.

4.None


Question:
Which of these is used to perform all input & output operations in Java?

1.classes

2.Variables

3.streams

4.Methods


Question:
Which of these is used to read a string from the input stream?

1.readLine()

2.get()

3.getLine()

4.read()


Question:
Which of these method of class StringBuffer is used to reverse sequence of characters?

1.reverseall()

2.Reverse()

3.reverse()

4.reverseAll()


Question:
Which of these method of FileReader class is used to read characters from a file?

1.get()

2.scanf()

3.read()

4.getInteger()


Question:
Which of these method of InputStream is used to read integer representation of next available byte input?

1.scanf()

2.read()

3.get()

4.getInteger()


Question:
Which of these methods can be used to writing console output?

1.print()

2.println()

3.write()

4.All of the above


Question:
Which of these methods can convert an object into a List?

1.ConvertList()

2.singletonList()

3.CopyList()

4.SetList()


Question:
Which of these methods can randomize all elements in a list?

1.randomize()

2.ambigous()

3.rand()

4.shuffle()


Question:
Which of these methods deletes all the elements from invoking collection?

1.delete()

2.refresh()

3.reset()

4.clear()


Question:
Which of these methods sets every element of a List to a specified object?

1.fill()

2.set()

3.add()

4.Complete()


Question:
Which of these packages contain classes and interfaces used for input & output operations of a program

1.java.io

2.java.util

3.java.lang

4.All of the above


Question:
Which of these standard collection classes implements a dynamic array?

1.ArrayList

2.LinkedList

3.AbstractSet

4.AbstractList


Question:
Which of these stream contains the classes which can work on character stream?

1.Character Stream

2.InputStream

3.OutputStream

4.All of the above


More MCQS

  1. Java Mcq Question Set 1
  2. Java Mcq Question Set 2
  3. Java Mcq Question Set 3
  4. Java Mcq Question Set 4
  5. Java Mcq Question Set 5
  6. Java Mcq Question Set 6
  7. Java Mcq Question Set 7
  8. Java Mcq Question Set 8
  9. Java Mcq Question Set 9
  10. Java Multiple Choice Questions
  11. DATA TYPES IN JAVA
  12. Classes ,Constructor ,Methods,Inheritance
  13. Java Multiple Choice Questions.
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