How many bytes are in 1 megabyte?

Study for the IGCSE Computer Science Test. Enhance your skills with flashcards and multiple choice questions. Each question provides hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

How many bytes are in 1 megabyte?

Explanation:
The correct answer identifies that 1 megabyte is equivalent to 2 to the 20 bytes. This is based on the binary definition of a megabyte, which is commonly used in computing. In binary terms, a kilobyte is defined as 1024 bytes (2 to the 10), so when we calculate a megabyte, we are essentially multiplying 1024 bytes by itself or, more precisely, raising 2 to the power of 20 (since 1 megabyte = 1024 kilobytes, and 1 kilobyte = 1024 bytes). This results in: \[ 1024 \text{ KB} = 1024 \times 1024 = 2^{20} \text{ bytes.} \] Thus, recognizing that 1 megabyte corresponds to 2 to the 20 bytes aligns with the common binary standard used in computer science and data storage to measure quantities. The other options do not accurately reflect the conventional definition of a megabyte in computing. For instance, 1000 bytes is far less than a megabyte, and both 1024 bytes and 2048 bytes do not represent a complete megabyte. Instead, they are part of the overall

The correct answer identifies that 1 megabyte is equivalent to 2 to the 20 bytes. This is based on the binary definition of a megabyte, which is commonly used in computing. In binary terms, a kilobyte is defined as 1024 bytes (2 to the 10), so when we calculate a megabyte, we are essentially multiplying 1024 bytes by itself or, more precisely, raising 2 to the power of 20 (since 1 megabyte = 1024 kilobytes, and 1 kilobyte = 1024 bytes).

This results in:

[

1024 \text{ KB} = 1024 \times 1024 = 2^{20} \text{ bytes.}

]

Thus, recognizing that 1 megabyte corresponds to 2 to the 20 bytes aligns with the common binary standard used in computer science and data storage to measure quantities.

The other options do not accurately reflect the conventional definition of a megabyte in computing. For instance, 1000 bytes is far less than a megabyte, and both 1024 bytes and 2048 bytes do not represent a complete megabyte. Instead, they are part of the overall

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