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 is best suited for reading integer tokens from a string containing space-separated integers?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
InputStreamReader
Why wrong: InputStreamReader is for reading bytes as characters, not for parsing tokens.
BufferedReader
Why wrong: BufferedReader reads entire lines; it does not parse tokens.
DataInputStream
Why wrong: DataInputStream reads binary data, not text.
Scanner
Scanner has nextInt() and can parse integers from a string directly.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Scanner
Scanner is best suited because it provides built-in methods like nextInt() that can parse space-separated integer tokens directly from a string, handling whitespace delimiters automatically. It is designed for parsing formatted input, making it the ideal choice for this task.
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.
InputStreamReader
Why it's wrong here
InputStreamReader is for reading bytes as characters, not for parsing tokens.
BufferedReader
Why it's wrong here
BufferedReader reads entire lines; it does not parse tokens.
DataInputStream
Why it's wrong here
DataInputStream reads binary data, not text.
Scanner
Why this is correct
Scanner has nextInt() and can parse integers from a string directly.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often choose BufferedReader because it is familiar for reading text, but they overlook that Scanner provides direct tokenization and parsing methods, making it the more appropriate and efficient choice for this specific task.
Detailed technical explanation
Under the hood, Scanner uses a delimiter pattern (default is whitespace) to break the input into tokens, and nextInt() internally parses the token using Integer.parseInt() after verifying it matches an integer pattern. A subtle behavior is that Scanner can be constructed directly from a String, making it convenient for in-memory parsing, but it can throw InputMismatchException if the token is not a valid integer. In real-world scenarios, this is commonly used for reading configuration files or user input where integers are space-separated.
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: Scanner — Scanner is best suited because it provides built-in methods like nextInt() that can parse space-separated integer tokens directly from a string, handling whitespace delimiters automatically. It is designed for parsing formatted input, making it the ideal choice for this task.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
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