Question 1

If we want to write objects to a file, what type of object should be passed to the ObjectOutputStream constructor?

Accepted Answer

A) FileOutputStream 
B) ObjectStream 
C) ObjectInputStream 
D) FileStream 
A) FileOutputStream 
B) ObjectStream 
C) ObjectInputStream 
D) FileStream

Question 2

Which is an advantage of storing numbers in binary format?
i.fast access
II.less storage needed
III.easy to read in a text editor

Accepted Answer

A) I and II only 
B) I only 
C) III only 
D) I and III only 
A) I and II only 
B) I only 
C) III only 
D) I and III only

Question 3

In which of the following modes can a RandomAccessFile be opened?
i.r
II.rw
III.w

Accepted Answer

A) I and III only 
B) I only 
C) I and II only 
D) II only 
A) I and III only 
B) I only 
C) I and II only 
D) II only

Question 4

What type of object describes the location of a file or directory?

Accepted Answer

A) Path 
B) Paths 
C) Files 
D) Directories 
A) Path 
B) Paths 
C) Files 
D) Directories

Question 5

How many methods are required to implement the Serializable interface?

Accepted Answer

A) 3 
B) 1 
C) 0 
D) 2 
A) 3 
B) 1 
C) 0 
D) 2

Question 6

Fill in the blank in the following code snippet to create an object for reading binary data from a disk file, named input.bin?
try (______________________________)
{
Process input
}

Accepted Answer

A) FileReader in = new FileReader("input.bin"); 
B) FileWriter in = new FileWriter("input.bin"); 
C) PrintWriter in = new PrintWriter("input.bin"); 
D) FileInputStream in = new FileInputStream("input.bin"); 
A) FileReader in = new FileReader("input.bin"); 
B) FileWriter in = new FileWriter("input.bin"); 
C) PrintWriter in = new PrintWriter("input.bin"); 
D) FileInputStream in = new FileInputStream("input.bin");

Question 7

Which is not a method available in the RandomAccessFile class?

Accepted Answer

A) readDouble 
B) open 
C) readInt 
D) close 
A) readDouble 
B) open 
C) readInt 
D) close

Question 8

Fill in the blank in the following code snippet that displays the java files in the current directory.

Accepted Answer

A) Stream listing = Files.list(Paths.get("")) B) Stream listing = Files.lines(Paths.get("")) C) Stream listing = Files.list(Paths.get("")) D) Stream listing = Files.list("") A) Stream listing = Files.list(Paths.get("")) B) Stream listing = Files.lines(Paths.get("")) C) Stream listing = Files.list(Paths.get("")) D) Stream listing = Files.list("")

Question 9

What is returned by the read method when a FileInputStream has reached the end of the file?

Accepted Answer

A) 0 
B) -1 
C) -2 
D) '
' 
A) 0 
B) -1 
C) -2 
D) '
'

Question 10

Objects are saved in ___________ format in object streams.

Accepted Answer

A) integer 
B) binary 
C) stream 
D) character 
A) integer 
B) binary 
C) stream 
D) character

If we want to write objects to a file, what type of object should be passed to the ObjectOutputStream constructor?

Which is an advantage of storing numbers in binary format? i.fast access II.less storage needed III.easy to read in a text editor

In which of the following modes can a RandomAccessFile be opened? i.r II.rw III.w

What type of object describes the location of a file or directory?

How many methods are required to implement the Serializable interface?

Fill in the blank in the following code snippet to create an object for reading binary data from a disk file, named input.bin? try (______________________________) { Process input }

Which is not a method available in the RandomAccessFile class?

Fill in the blank in the following code snippet that displays the java files in the current directory.

What is returned by the read method when a FileInputStream has reached the end of the file?

Objects are saved in ___________ format in object streams.

Introduction

Using Objects

Implementing Classes

Fundamental Data Types

Decisions

Loops

Arrays and Array Lists

Designing Classes

Inheritance

Interfaces

Input/Output and Exception Handling

Object-Oriented Design

Recursion

Sorting and Searching

The Java Collections Framework

Basic Data Structures

Tree Structures

Generic Classes

Stream Processing

Graphical User Interfaces

Multithreading

Internet Networking

Relational Databases

XML

Filters

Exam 21: Advanced Input/Output

If we want to write objects to a file, what type of object should be passed to the ObjectOutputStream constructor?

Which is an advantage of storing numbers in binary format? i.fast access II.less storage needed III.easy to read in a text editor

In which of the following modes can a RandomAccessFile be opened? i.r II.rw III.w

What type of object describes the location of a file or directory?

How many methods are required to implement the Serializable interface?

Fill in the blank in the following code snippet to create an object for reading binary data from a disk file, named input.bin? try (______________________________) { Process input }

Which is not a method available in the RandomAccessFile class?

Fill in the blank in the following code snippet that displays the java files in the current directory.

What is returned by the read method when a FileInputStream has reached the end of the file?

Objects are saved in ___________ format in object streams.

Introduction

Using Objects

Implementing Classes

Fundamental Data Types

Decisions

Loops

Arrays and Array Lists

Designing Classes

Inheritance

Interfaces

Input/Output and Exception Handling

Object-Oriented Design

Recursion

Sorting and Searching

The Java Collections Framework

Basic Data Structures

Tree Structures

Generic Classes

Stream Processing

Graphical User Interfaces

Multithreading

Internet Networking

Relational Databases

XML

Filters