What is Collection in Java?
1.A group of classes
2.A group of objects
3.A group of interfaces
4.None
Posted Date:-2021-10-25 05:26:59
Which exception is thrown by read() method?
1.SystemInputException
2.SystemException
3.InterruptedException
4.IOException
Posted Date:-2021-10-25 05:26:59
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.
Posted Date:-2021-10-25 05:26:59
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
Posted Date:-2021-10-25 05:26:59
Which of these class contains the methods print() & println()?
1.System.out
2.System
3.PrintStream
4.BUfferedOutputStream
Posted Date:-2021-10-25 05:26:59
Which of these class is implemented by FilterInputStream class?
1.BufferedInputStream
2.FileInputStream
3.BufferedFileInputStream
4.InputStream
Posted Date:-2021-10-25 05:26:59
Which of these class is not a member class of java.io package?
1.Writer
2.String
3.File
4.StringReader
Posted Date:-2021-10-25 05:26:59
Which of these class is not related to input and output stream in terms of functioning?
1.File
2.Writer
3.Reader
4.InputStream
Posted Date:-2021-10-25 05:26:59
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
Posted Date:-2021-10-25 05:26:59
Which of these class is used to read and write bytes in a file?
1.InputStreamReader
2.FileInputStream
3.FileWriter
4.FileReader
Posted Date:-2021-10-25 05:26:59
Which of these class is used to read characters and strings in Java from console?
1.StringReader
2.BufferedReader
3.InputStreamReader
4.BufferedStreamReader
Posted Date:-2021-10-25 05:26:59
Which of these class is used to read characters in a file?
1.FileWriter
2.FileReader
3.FileInputStream
4.InputStreamReader
Posted Date:-2021-10-25 05:26:59
Which of these class is used to read from byte array?
1.BufferedInputStream
2.ArrayInputStream
3.ByteArrayInputStream
4.InputStream
Posted Date:-2021-10-25 05:26:59
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
Posted Date:-2021-10-25 05:26:59
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
Posted Date:-2021-10-25 05:26:59
Which of these classes are used by character streams for input and output operations?
1.Writer
2.InputStream
3.InputOutputStream
4.ReadStream
Posted Date:-2021-10-25 05:26:59
Which of these classes are used by character streams output operations?
1.Writer
2.InputStream
3.ReadStream
4.InputOutputStream
Posted Date:-2021-10-25 05:26:59
Which of these classes can return more than one character to be returned to input stream?
1.PushbachReader
2.BufferedReader
3.CharArrayReader
4.Bufferedwriter
Posted Date:-2021-10-25 05:26:59
Which of these classes is not part of Java's collection framework?
1.Stack
2.Queue
3.Array
4.Maps
Posted Date:-2021-10-25 05:26:59
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
Posted Date:-2021-10-25 05:26:59
Which of these data type is returned by every method of OutputStream?
1.float
2.int
3.byte
4.None of these
Posted Date:-2021-10-25 05:26:59
Which of these interface declares core method that all collections will have?
1.Comparator
2.Collection
3.EventListner
4.set
Posted Date:-2021-10-25 05:26:59
Which of these interface handle sequences?
1.List
2.Set
3.Collection
4.Comparator
Posted Date:-2021-10-25 05:26:59
Which of these interface is not a member of java.io package?
1.ObjectFilter
2.DataInput
3.FileFilter
4.ObjectInput
Posted Date:-2021-10-25 05:26:59
Which of these interface is not a part of Java's collection framework?
1.Set
2.List
3.SortedList
4.SortedMap
Posted Date:-2021-10-25 05:26:59
Which of these interface is not a part of Java's collection framework?
1.Set
2.List
3.SortedList
4.SortedMap
Posted Date:-2021-10-25 05:26:59
Which of these interface must contain a unique element?
1.Set
2.List
3.Collection
4.Array
Posted Date:-2021-10-25 05:26:59
Which of these is a method to clear all the data present in output buffers?
1.flush()
2.clear()
3.close()
4.fflush()
Posted Date:-2021-10-25 05:26:59
Which of these is a method to clear all the data present in output buffers?
1.close()
2.clear()
3.fflush()
4.flush()
Posted Date:-2021-10-25 05:26:59
Which of these is a type of stream in Java?
1.Short stream
2.Integer stream
3.Long stream
4.Byte stream
Posted Date:-2021-10-25 05:26:59
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)
Posted Date:-2021-10-25 05:26:59
Which of these is Basic interface that all other interface inherits?
1.Array
2.Set
3.Collection
4.List
Posted Date:-2021-10-25 05:26:59
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()
Posted Date:-2021-10-25 05:26:59
Which of these is method is used for writing bytes to an outputstream?
1.print()
2.put()
3.printf()
4.write()
Posted Date:-2021-10-25 05:26:59
Which of these is specified by a File object?
1.directory path
2.directory in disk
3.a file in disk
4.None
Posted Date:-2021-10-25 05:26:59
Which of these is static variable defined in Collections?
1.EMPTY_SET
2.EMPTY_LIST
3.EMPTY_MAP
4.All of the above
Posted Date:-2021-10-25 05:26:59
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
Posted Date:-2021-10-25 05:26:59
Which of these is used to perform all input & output operations in Java?
1.classes
2.Variables
3.streams
4.Methods
Posted Date:-2021-10-25 05:26:59
Which of these is used to read a string from the input stream?
1.readLine()
2.get()
3.getLine()
4.read()
Posted Date:-2021-10-25 05:26:59
Which of these method of class StringBuffer is used to reverse sequence of characters?
1.reverseall()
2.Reverse()
3.reverse()
4.reverseAll()
Posted Date:-2021-10-25 05:26:59
Which of these method of FileReader class is used to read characters from a file?
1.get()
2.scanf()
3.read()
4.getInteger()
Posted Date:-2021-10-25 05:26:59
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()
Posted Date:-2021-10-25 05:26:59
Which of these methods can be used to writing console output?
1.print()
2.println()
3.write()
4.All of the above
Posted Date:-2021-10-25 05:26:59
Which of these methods can convert an object into a List?
1.ConvertList()
2.singletonList()
3.CopyList()
4.SetList()
Posted Date:-2021-10-25 05:26:59
Which of these methods can randomize all elements in a list?
1.randomize()
2.ambigous()
3.rand()
4.shuffle()
Posted Date:-2021-10-25 05:26:59
Which of these methods deletes all the elements from invoking collection?
1.delete()
2.refresh()
3.reset()
4.clear()
Posted Date:-2021-10-25 05:26:59
Which of these methods sets every element of a List to a specified object?
1.fill()
2.set()
3.add()
4.Complete()
Posted Date:-2021-10-25 05:26:59
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
Posted Date:-2021-10-25 05:26:59
Which of these standard collection classes implements a dynamic array?
1.ArrayList
2.LinkedList
3.AbstractSet
4.AbstractList
Posted Date:-2021-10-25 05:26:59
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
Posted Date:-2021-10-25 05:26:59