Quick Answer
The correct answer is gigabytes because 100 high-resolution photos, each typically between 5 and 25 megabytes, will total hundreds of megabytes to several gigabytes, making gigabytes the most practical unit for expressing that order of magnitude. This choice reflects the core technical concept of data storage units: you select a unit that keeps the numeric value manageable—using kilobytes or bytes for this volume would produce unwieldy large numbers, while terabytes would be excessive. On the CompTIA ITF+ FC0-U61 exam, this question tests your ability to match real-world file sizes with appropriate units, a common scenario in storage planning. A frequent trap is defaulting to megabytes because individual photos are measured that way, but the total for a collection of 100 pushes the scale into gigabytes. For a quick memory tip, think “100 photos = GB” as a rule of thumb: when you have a hundred or more large files, you’ve likely crossed into gigabyte territory.
This FC0-U61 practice question tests your understanding of it concepts and terminology. Compare every option against the stated constraints before choosing — the best answer satisfies all requirements, not just the most obvious one. 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.
A user wants to store 100 high-resolution photos. Which unit of measurement is MOST appropriate for the total file size?
Kilobytes
Why wrong: Kilobytes are too small; a single high-res photo is often several megabytes.
Bytes
Why wrong: Bytes are too small; a single high-res photo is millions of bytes.
Bits
Why wrong: Bits are too small; files are measured in bytes and larger units.
Gigabytes
100 high-res photos can easily total several gigabytes.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Gigabytes
High-resolution photos typically range from 5 to 25 megabytes each, so 100 such photos would total hundreds of megabytes to several gigabytes. Gigabytes (GB) is the most appropriate unit because it matches the expected order of magnitude for this data volume, whereas smaller units like kilobytes or bytes would require unwieldy large numbers. This aligns with common storage measurements in IT, where GB is standard for large file collections.
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.
Kilobytes
Why it's wrong here
Kilobytes are too small; a single high-res photo is often several megabytes.
Bytes
Why it's wrong here
Bytes are too small; a single high-res photo is millions of bytes.
Bits
Why it's wrong here
Bits are too small; files are measured in bytes and larger units.
Gigabytes
Why this is correct
100 high-res photos can easily total several gigabytes.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse bits with bytes or underestimate the size of high-resolution photos, leading them to pick smaller units like kilobytes or bytes, but the correct unit must match the practical scale of the data.
Detailed technical explanation
Under the hood, file sizes are measured in binary multiples (e.g., 1 GB = 1,073,741,824 bytes) or decimal multiples (e.g., 1 GB = 1,000,000,000 bytes) depending on context, but the unit 'gigabyte' is universally used for large storage capacities. In real-world scenarios, a 24-megapixel JPEG photo might be 10–20 MB, so 100 photos could be 1–2 GB, fitting neatly into the GB range. Understanding the hierarchy—bits, bytes, kilobytes, megabytes, gigabytes—is critical for estimating storage needs and avoiding unit confusion in IT.
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 FC0-U61 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
IT Concepts and Terminology — This question tests IT Concepts and Terminology — Read the scenario before looking for a memorised answer..
The correct answer is: Gigabytes — High-resolution photos typically range from 5 to 25 megabytes each, so 100 such photos would total hundreds of megabytes to several gigabytes. Gigabytes (GB) is the most appropriate unit because it matches the expected order of magnitude for this data volume, whereas smaller units like kilobytes or bytes would require unwieldy large numbers. This aligns with common storage measurements in IT, where GB is standard for large file collections.
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 FC0-U61 practice question is part of Courseiva's free CompTIA 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 FC0-U61 exam.
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