U1. Files and Serialization

U1. Files and Serialization

University

17 Qs

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U1. Files and Serialization

U1. Files and Serialization

Assessment

Quiz

Computers

University

Practice Problem

Easy

Created by

Héctor L

Used 19+ times

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17 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the key difference between text and binary files?

Text files store data as bytes, while binary files store characters.

Text files are human-readable, while binary files are not.

Binary files are faster to read, while text files are less efficient.

Binary files cannot be opened on certain operating systems.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following classes is used to read lines from a text file in Java?

FileWriter

BufferedReader

DataInputStream

ObjectInputStream

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

What will the code in the image do?

Write the string "Hello, world!" to output.txt.

Throw an exception because BufferedWriter cannot be closed before FileWriter.

Write a single character 'H' to output.txt.

Create the file output.txt but not write anything to it.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which method in FileInputStream is used to read a single byte from a binary file?

readLine()

read()

readByte()

getByte()

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Serialization in Java requires which interface to be implemented?

Serializable

Serializate

IOSerializate

IOSerializable

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What exception is thrown if a file does not exist when using FileInputStream?

NullPointerException

FileNotFoundException

IOException

StreamCorruptedException

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the following line of code do?

output.writeObject(object);

Writes a character to the file.

Writes an object to the file after converting it to bytes.

Saves a text representation of the object.

Appends an object to an existing file.

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