Match each I/O stream class to its description.
Drag a concept onto its matching description — or click a concept then click the description.
Reads text from a character-input stream, buffering characters
Reads raw bytes from a file
Writes primitive types and Java objects to an OutputStream
Prints formatted representations of objects to a text-output stream
Reads primitive Java data types from an underlying input stream
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
FileInputStream: Reads bytes from a file
The correct matches are based on the direction (read vs write) and type (byte vs character) of the stream. FileInputStream reads bytes; FileOutputStream writes bytes. BufferedReader reads characters with buffering; BufferedWriter writes characters with buffering.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
FileInputStream: Reads bytes from a file
Why this is correct
FileInputStream is used for reading raw bytes from a file.
FileOutputStream: Writes bytes to a file
Why this is correct
FileOutputStream is used for writing raw bytes to a file.
BufferedReader: Reads text from a character-input stream, buffering characters
Why this is correct
BufferedReader provides efficient reading of characters by buffering.
BufferedWriter: Writes text to a character-output stream, buffering characters
Why this is correct
BufferedWriter provides efficient writing of characters by buffering.
FileInputStream: Writes bytes to a file
Why it's wrong here
Incorrect — this describes FileOutputStream, not FileInputStream.
BufferedReader: Writes text to a character-output stream
Why it's wrong here
Incorrect — this describes BufferedWriter, not BufferedReader.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 1Z0-829 practice question is part of Courseiva's free Oracle certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 1Z0-829 exam.