1 gigabyte in binary system is equivalent to
- A.1000 kilobytes
- B.1024 megabytes
- C.1200 megabytes
- D.10000 kilobytes
Correct answer
Explanation
The correct answer is B, 1024 megabytes. In the binary system every step up the ladder of memory units is a factor of 2 raised to 10, that is 1024, so one gigabyte holds 1024 megabytes.
Computers count in powers of two. A bit is a single 0 or 1 and eight bits make a byte. Then 1024 bytes make a kilobyte, 1024 kilobytes a megabyte, 1024 megabytes a gigabyte and 1024 gigabytes a terabyte. So one gigabyte is 1024 × 1024 kilobytes, or 1,048,576 KB, and 2 raised to 30 bytes. Storage makers often use the decimal value of 1000 instead, which is why a new drive shows slightly less space than its label.
A is wrong because 1000 kilobytes is roughly one megabyte, not a gigabyte. C is wrong because 1200 is not a power of two and matches no standard. D is wrong because 10000 kilobytes is only about 10 megabytes.
Exam tip: bit → byte (×8) → KB → MB → GB → TB → PB, each step ×1024.
Practice Questions
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- A.1 and 2 only
- B.1, 3 and 4
- C.2 and 3 only
- D.1, 2 and 3
Show answer
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- A.1 and 2
- B.1 and 3
- C.2 and 3
- D.2 and 4
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- D.Neither 1 nor 2
Show answer
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Read the full explanation →Consider the following:
1. Small memory
2. Less expensive memory
3. Fast memory
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- A.1 and 2 only
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Show answer
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