Question 1

Streams that input bytes from and output bytes to files are known as ________.

Accepted Answer

A)  bit-based streams 
B)  byte-based streams 
C)  character-based streams 
D)  Unicode-based streams 
A)  bit-based streams 
B)  byte-based streams 
C)  character-based streams 
D)  Unicode-based streams B

Question 2

The ________ abstract classes are Unicode character-based streams.

Accepted Answer

A)  Reader and Writer 
B)  BufferedReader and BufferedWriter 
C)  CharArrayReader and CharArrayWriter 
D)  UnicodeReader and UnicodeWriter 
A)  Reader and Writer 
B)  BufferedReader and BufferedWriter 
C)  CharArrayReader and CharArrayWriter 
D)  UnicodeReader and UnicodeWriter A

Question 3

Class ________ provides static methods for common file and directory manipulations, including methods for copying files; creating and deleting files and directories; getting information about files and directories; reading the contents of files; getting objects that allow you to manipulate the contents of files and directories; and more.

Accepted Answer

A)  File 
B)  FileAndDirectory 
C)  Files 
D)  FilesAndDirectories 
A)  File 
B)  FileAndDirectory 
C)  Files 
D)  FilesAndDirectories C

Question 4

Which of the following statements is false?

Accepted Answer

A)  Storage of data variables and arrays is temporary. 
B)  Data is lost when a local variable "goes out of scope." 
C)  Files are used for long-term retention of large amounts of data. 
D)  Data maintained in files is often called transient data. 
A)  Storage of data variables and arrays is temporary. 
B)  Data is lost when a local variable "goes out of scope." 
C)  Files are used for long-term retention of large amounts of data. 
D)  Data maintained in files is often called transient data.

Question 5

________ is an I/O-performance-enhancement technique-it reduces the number of I/O operations by combining smaller outputs together in memory; the number of physical I/O operations is much smaller than the number of I/O requests issued by the program.

Accepted Answer

A)  Aggregating 
B)  Accumulating 
C)  Amassing 
D)  Buffering 
A)  Aggregating 
B)  Accumulating 
C)  Amassing 
D)  Buffering

Question 6

Which of the following statements is false?

Accepted Answer

A)  InputStream and OutputStream are abstract classes for performing byte-based I/O. 
B)  Tubes are synchronized communication channels between threads. 
C)  A filter stream provides additional functionality, such as aggregating data bytes into meaningful primitive-type units. FilterInputStream and FilterOutputStream are typically extended, so some of their filtering capabilities are provided by their concrete subclasses. 
D)  A PrintStream performs text output. System.out and System.err are PrintStreams. 
A)  InputStream and OutputStream are abstract classes for performing byte-based I/O. 
B)  Tubes are synchronized communication channels between threads. 
C)  A filter stream provides additional functionality, such as aggregating data bytes into meaningful primitive-type units. FilterInputStream and FilterOutputStream are typically extended, so some of their filtering capabilities are provided by their concrete subclasses. 
D)  A PrintStream performs text output. System.out and System.err are PrintStreams.

Question 7

A(n) ________ path starts from the directory in which the application began executing.

Accepted Answer

A)  absolute 
B)  relative 
C)  parallel 
D)  comparative 
A)  absolute 
B)  relative 
C)  parallel 
D)  comparative

Question 8

Which of the following statements is false?

Accepted Answer

A)  A LineNumberReader is a buffered character stream that tracks the number of lines read. 
B)  Classes FileReader and FileWriter perform character-based file I/O. 
C)  Class PipedReader and class PipedWriter implement piped-character streams for transferring data between threads. 
D)  Class StringReader and StringWriter read characters from and write characters to Streams, respectively. 
A)  A LineNumberReader is a buffered character stream that tracks the number of lines read. 
B)  Classes FileReader and FileWriter perform character-based file I/O. 
C)  Class PipedReader and class PipedWriter implement piped-character streams for transferring data between threads. 
D)  Class StringReader and StringWriter read characters from and write characters to Streams, respectively.

Question 9

Which of the following statements is false?

Accepted Answer

A)  A Path represents the location of a file or directory. 
B)  Path objects open files and provide file-processing capabilities. 
C)  Class Paths is used to get a Path object representing a file or directory location. 
D)  The static method get of class Paths converts a String representing a file's or directory's location into a Path object. 
A)  A Path represents the location of a file or directory. 
B)  Path objects open files and provide file-processing capabilities. 
C)  Class Paths is used to get a Path object representing a file or directory location. 
D)  The static method get of class Paths converts a String representing a file's or directory's location into a Path object.

Question 10

Which of the following is false?

Accepted Answer

A)  JAXB works with POJOs (plain old Java objects)-no special superclasses or interfaces are required for XML-serialization support. 
B)  JAXB serializes only an object's public instance variables and public read-write properties. 
C)  A class must provide a public default or no-argument constructor to recreate the objects when they're read from the file. 
D)  JAXB requires you to implement special superclasses and interfaces for XML-serialization support. 
A)  JAXB works with POJOs (plain old Java objects)-no special superclasses or interfaces are required for XML-serialization support. 
B)  JAXB serializes only an object's public instance variables and public read-write properties. 
C)  A class must provide a public default or no-argument constructor to recreate the objects when they're read from the file. 
D)  JAXB requires you to implement special superclasses and interfaces for XML-serialization support.

Question 11

Which of the following statements is false?

Accepted Answer

A)  Path method isAbsolute returns a boolean indicating whether a Path represents an absolute path to a file or directory. 
B)  Files static method getLastModifiedTime receives a Path and returns a FileTime (package java.nio.file.attribute) indicating when the file was last modified. 
C)  Files static method size receives a Path and returns a long representing the number of bytes in the file or directory. For directories, the value returned is platform specific. 
D)  All of the above are true. 
A)  Path method isAbsolute returns a boolean indicating whether a Path represents an absolute path to a file or directory. 
B)  Files static method getLastModifiedTime receives a Path and returns a FileTime (package java.nio.file.attribute) indicating when the file was last modified. 
C)  Files static method size receives a Path and returns a long representing the number of bytes in the file or directory. For directories, the value returned is platform specific. 
D)  All of the above are true.

Question 12

What does the following statement do?
 Scanner scanner = new Scanner(Paths.get("test.txt"));

Accepted Answer

A)  Opens a binary file for input. 
B)  Opens a binary file for output. 
C)  Opens a text file for input. 
D)  Opens a text file for output. 
A)  Opens a binary file for input. 
B)  Opens a binary file for output. 
C)  Opens a text file for input. 
D)  Opens a text file for output.

Question 13

Which of the following is false?

Accepted Answer

A)  JAXB (Java Architecture for XML Binding) enables you to perform XML serialization. 
B)  Marshaling is the process of deserializing an object. 
C)  A serialized object is represented by XML that includes the object's data. 
D)  XML (eXtensible Markup Language) is a widely used language for describing data. 
A)  JAXB (Java Architecture for XML Binding) enables you to perform XML serialization. 
B)  Marshaling is the process of deserializing an object. 
C)  A serialized object is represented by XML that includes the object's data. 
D)  XML (eXtensible Markup Language) is a widely used language for describing data.

Question 14

Which DirectoryChooser method returns the folder the user selected?

Accepted Answer

A)  getSelectedfolder. 
B)  showDialog. 
C)  getOpenDialog. 
D)  showOpenDialog. 
A)  getSelectedfolder. 
B)  showDialog. 
C)  getOpenDialog. 
D)  showOpenDialog.

Question 15

Path method ________ returns the String name of a file or directory without any location information.

Accepted Answer

A)  getStringName 
B)  getFileOrDirectoryName 
C)  getDirectoryName 
D)  getFileName 
A)  getStringName 
B)  getFileOrDirectoryName 
C)  getDirectoryName 
D)  getFileName

Question 16

Records in a sequential file are not usually updated in place. Instead ________.

Accepted Answer

A)  the updated data is placed in a "surrogate" file 
B)  the entire file is usually rewritten 
C)  the file is truncated 
D)  The above statement is false-records in sequential files are usually updated in place. 
A)  the updated data is placed in a "surrogate" file 
B)  the entire file is usually rewritten 
C)  the file is truncated 
D)  The above statement is false-records in sequential files are usually updated in place.

Question 17

JAXB's static method ________ deserializes objects from XML.

Accepted Answer

A)  fromXML 
B)  deserialize 
C)  unmarshal 
D)  None of the above 
A)  fromXML 
B)  deserialize 
C)  unmarshal 
D)  None of the above

Question 18

Which of the following statements is true?

Accepted Answer

A)  Class Scanner provides the ability to reposition to the beginning of a file with method seek. 
B)  Class Scanner provides the ability to reposition to the beginning of a file with method reposition. 
C)  Class Scanner does not provide the ability to reposition to the beginning of the file. 
D)  If it is necessary to read a sequential file again, the program can simply keep reading-when the end of the file is reached, the Scanner is automatically set to point back to the beginning of the file. 
A)  Class Scanner provides the ability to reposition to the beginning of a file with method seek. 
B)  Class Scanner provides the ability to reposition to the beginning of a file with method reposition. 
C)  Class Scanner does not provide the ability to reposition to the beginning of the file. 
D)  If it is necessary to read a sequential file again, the program can simply keep reading-when the end of the file is reached, the Scanner is automatically set to point back to the beginning of the file.

Question 19

When all the contents of a file are truncated, this means that ________.

Accepted Answer

A)  the data in the file is saved to a backup file 
B)  the file is deleted 
C)  a FileNotFoundException occurs 
D)  all the data in the file is discarded 
A)  the data in the file is saved to a backup file 
B)  the file is deleted 
C)  a FileNotFoundException occurs 
D)  all the data in the file is discarded

Question 20

Which FileChooser method returns the file the user selected?

Accepted Answer

A)  getSelectedFile. 
B)  getFile. 
C)  getOpenDialog. 
D)  showOpenDialog. 
A)  getSelectedFile. 
B)  getFile. 
C)  getOpenDialog. 
D)  showOpenDialog.

Exam 15: Files, Inputoutput Streams, Nio and Xml Serialization

Streams that input bytes from and output bytes to files are known as ________.

The ________ abstract classes are Unicode character-based streams.

Which of the following statements is false?

________ is an I/O-performance-enhancement technique-it reduces the number of I/O operations by combining smaller outputs together in memory; the number of physical I/O operations is much smaller than the number of I/O requests issued by the program.

Which of the following statements is false?

A(n) ________ path starts from the directory in which the application began executing.

Which of the following statements is false?

Which of the following statements is false?

Which of the following is false?

Which of the following statements is false?

What does the following statement do? Scanner scanner = new Scanner(Paths.get("test.txt"));

Which of the following is false?

Which DirectoryChooser method returns the folder the user selected?

Path method ________ returns the String name of a file or directory without any location information.

Records in a sequential file are not usually updated in place. Instead ________.

JAXB's static method ________ deserializes objects from XML.

Which of the following statements is true?

When all the contents of a file are truncated, this means that ________.

Which FileChooser method returns the file the user selected?

Introduction to Computers, the Internet and Java

Introduction to Java Applications; Inputoutput and Operators

Introduction to Classes, Objects, Methods and Strings

Control Statements: Assignment, and Operators

Control Statements: Logical Operators

Methods: a Deeper Look

Arrays and Arraylists

Classes and Objects: a Deeper Look

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism and Interfaces

Exception Handling: a Deeper Look

Javafx Graphical User Interfaces

Javafx Gui

Strings, Characters and Regular Expressions

Generic Collections

Lambdas and Streams

Recursion

Searching, Sorting and Big O

Generic Classes and Methods: a Deeper Look

Custom Generic Data Structures

Concurrency

Accessing Databases With Jdbc

Swing Gui Components

Graphics and Java 2d

Networking

Java Persistence Api Jpa

Javaserver Faces Web Apps

Javaserver Faces Web Apps

Swing Gui Components

Filters