Question 1

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 2

Which of the following statements is false?

Accepted Answer

A) With a BufferedOutputStream each output operation is directed to a buffer large enough to hold the data of many output operations.Transfer to the output device is performed in one large physical output operation when the buffer fills. 
B) With a BufferedOutputStream,a partially filled buffer can be forced out to the device at any time by invoking the stream object's force method. 
C) With a BufferedInputStream,many "logical" chunks of data from a file are read as one large physical input operation into a memory buffer. 
D) With a BufferedInputStream,as a program requests data,it's taken from the buffer.When the buffer is empty,the next actual physical input operation is performed. 
A) With a BufferedOutputStream each output operation is directed to a buffer large enough to hold the data of many output operations.Transfer to the output device is performed in one large physical output operation when the buffer fills. 
B) With a BufferedOutputStream,a partially filled buffer can be forced out to the device at any time by invoking the stream object's force method. 
C) With a BufferedInputStream,many "logical" chunks of data from a file are read as one large physical input operation into a memory buffer. 
D) With a BufferedInputStream,as a program requests data,it's taken from the buffer.When the buffer is empty,the next actual physical input operation is performed.

Question 3

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 4

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 5

Which of the following statements is false?

Accepted Answer

A) A DirectoryStream enables a program to iterate through the contents of a directory. 
B) Character-based input and output can be performed with classes Scanner and Formatter. 
C) A relative path contains all the directories,starting with the root directory,that lead to a specific file or directory. 
D) Every file or directory on a disk drive has the same root directory in its path. 
A) A DirectoryStream enables a program to iterate through the contents of a directory. 
B) Character-based input and output can be performed with classes Scanner and Formatter. 
C) A relative path contains all the directories,starting with the root directory,that lead to a specific file or directory. 
D) Every file or directory on a disk drive has the same root directory in its path.

Question 6

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 7

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 8

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 9

________ 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

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

Which of the following statements is false?

Which of the following statements is false?

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

Which of the following statements is false?

Which of the following statements is false?

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

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

________ 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.

Introduction to Computers and Java

Introduction to Java Applications

Introduction to Classes and Objects

Control Statements: Part 1

Control Statements: Part 2

Methods: a Deeper Look

Arrays and Arraylists

Classes and Objects: a Deeper Look

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Gui Components: Part 1

Graphics and Java 2D

Strings

Generic Collections

Lambdas

Recursion

Searching, Sorting and Big O

Generic Classes and Methods

Custom Generic Data Structures

Concurrency

Accessing Databases With Jdbc

JavaFX

Filters

Exam 15: Files,streams and Object Serialization

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

Which of the following statements is false?

Which of the following statements is false?

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

Which of the following statements is false?

Which of the following statements is false?

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

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

________ 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.

Introduction to Computers and Java

Introduction to Java Applications

Introduction to Classes and Objects

Control Statements: Part 1

Control Statements: Part 2

Methods: a Deeper Look

Arrays and Arraylists

Classes and Objects: a Deeper Look

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Gui Components: Part 1

Graphics and Java 2D

Strings

Generic Collections

Lambdas

Recursion

Searching, Sorting and Big O

Generic Classes and Methods

Custom Generic Data Structures

Concurrency

Accessing Databases With Jdbc

JavaFX

Filters