Quick Answer
The answer is MD5. This is correct because a certificate fingerprint displayed as a 32-character hexadecimal string directly indicates a 128-bit hash, and MD5 is the algorithm that produces exactly a 128-bit (16-byte) output, formatted as 32 hex digits. On the Oracle Certified Professional Java SE 17 Developer 1Z0-829 exam, this concept tests your ability to recognize hash algorithm properties from their output length, often appearing in questions about certificate validation or security APIs. A common trap is confusing MD5 with SHA-1, which produces a 160-bit hash shown as 40 hex characters, or SHA-256 with 64 hex characters. Remember the key identifier: the certificate fingerprint MD5 algorithm length 32 hex is a dead giveaway—think “MD5 = 32 hex digits = 128 bits.” For a quick memory tip, associate “MD5” with “Matching Digits: 5 groups of 32?” No—just recall that 32 hex characters mean 128 bits, and MD5 is the only common algorithm with that exact length.
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.
CLI output of 'keytool -list -keystore mykeystore.jks -storepass changeit': alias: myserver Certificate fingerprint (MD5): 0F:AA:3B:87:1C:3F:BE:21:4D:2E:5F:6A:7B:8C:9D:0E
Refer to the exhibit. Which algorithm was used to generate the certificate fingerprint shown?
CLI output of 'keytool -list -keystore mykeystore.jks -storepass changeit': alias: myserver Certificate fingerprint (MD5): 0F:AA:3B:87:1C:3F:BE:21:4D:2E:5F:6A:7B:8C:9D:0E
SHA-1
Why wrong: The exhibit does not indicate SHA-1; it shows MD5.
MD5
The fingerprint shown is MD5 as indicated in the exhibit.
SHA-384
Why wrong: SHA-384 is not mentioned.
SHA-256
Why wrong: The label says MD5, not SHA-256.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
MD5
The certificate fingerprint shown is a 32-character hexadecimal string, which corresponds to a 128-bit hash. MD5 produces a 128-bit (16-byte) hash, displayed as 32 hex digits. This matches the fingerprint format exactly, confirming that MD5 was used.
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.
SHA-1
Why it's wrong here
The exhibit does not indicate SHA-1; it shows MD5.
MD5
Why this is correct
The fingerprint shown is MD5 as indicated in the exhibit.
Related concept
Read the scenario before looking for a memorised answer.
SHA-384
Why it's wrong here
SHA-384 is not mentioned.
SHA-256
Why it's wrong here
The label says MD5, not SHA-256.
Common exam traps
The trap here is that candidates often confuse the output length of hash algorithms: MD5 (32 hex chars) is frequently mistaken for SHA-1 (40 hex chars) or SHA-256 (64 hex chars), leading them to pick a wrong answer based on familiarity rather than counting the hex digits.
Trap categories for this question
Command / output trap
The exhibit does not indicate SHA-1; it shows MD5.
Detailed technical explanation
MD5 (Message Digest Algorithm 5) is defined in RFC 1321 and produces a 128-bit hash value. While still used for non-cryptographic checksums, it is considered cryptographically broken due to collision vulnerabilities (e.g., the 2004 Wang et al. attack). In Java, MD5 is available via MessageDigest.getInstance("MD5") but is deprecated for security-sensitive contexts in favor of SHA-256 or stronger algorithms.
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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: MD5 — The certificate fingerprint shown is a 32-character hexadecimal string, which corresponds to a 128-bit hash. MD5 produces a 128-bit (16-byte) hash, displayed as 32 hex digits. This matches the fingerprint format exactly, confirming that MD5 was used.
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
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