This 1Z0-829 practice question tests your understanding of java i/o api and securing applications. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which class provides a convenient means to read text from a file line by line?
FileReader
Why wrong: Reads characters, no built-in line reading.
Scanner
Why wrong: Has nextLine() but less efficient than BufferedReader.
FileInputStream
Why wrong: Binary stream, not for text.
BufferedReader
Reads text efficiently line by line.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
BufferedReader
BufferedReader (option D) is the correct answer because it provides the `readLine()` method, which reads text from a character-input stream line by line, efficiently buffering characters to avoid frequent disk reads. When wrapped around a FileReader, it enables convenient and performant line-by-line reading of text files.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
FileReader
Why it's wrong here
Reads characters, no built-in line reading.
Scanner
Why it's wrong here
Has nextLine() but less efficient than BufferedReader.
FileInputStream
Why it's wrong here
Binary stream, not for text.
BufferedReader
Why this is correct
Reads text efficiently line by line.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often choose Scanner (option B) because they know it has `nextLine()`, but they overlook that Scanner is not optimized for simple line-by-line file reading and is typically used for parsing structured input, whereas BufferedReader is the dedicated, efficient choice for this task.
Detailed technical explanation
Under the hood, BufferedReader uses an internal buffer (default size 8192 characters) to minimize I/O operations by reading larger chunks from the underlying stream. The `readLine()` method scans the buffer for line terminators (`\n`, `\r`, or `\r\n`) and returns the line content as a String, excluding the terminator. In real-world scenarios, wrapping a FileReader with BufferedReader is the standard pattern for reading large text files line by line, as it reduces the number of system calls and improves performance.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 1Z0-829 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Java I/O API and Securing Applications — This question tests Java I/O API and Securing Applications — Read the scenario before looking for a memorised answer..
The correct answer is: BufferedReader — BufferedReader (option D) is the correct answer because it provides the `readLine()` method, which reads text from a character-input stream line by line, efficiently buffering characters to avoid frequent disk reads. When wrapped around a FileReader, it enables convenient and performant line-by-line reading of text files.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
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.
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