question 10 of 10
which three statements are true about lossless compression?

a. it is used to reduce the size of text documents.

b. it allows all of a file’s original data to be restored from the
compressed data.

c. it sends data to all the devices on a network.

d. it reduces the file size temporarily.

Question

question 10 of 10
which three statements are true about lossless compression?

a. it is used to reduce the size of text documents.

b. it allows all of a file’s original data to be restored from the
compressed data.

c. it sends data to all the devices on a network.

d. it reduces the file size temporarily.

Accepted Answer

# Brief Explanations:
- Option A: Lossless compression can be used for text documents to reduce size while preserving all data, so this is true.
- Option B: By definition, lossless compression enables the original data to be fully restored from the compressed data, so this is true.
- Option C: Sending data to all devices on a network is broadcasting, not related to lossless compression, so this is false.
- Option D: Lossless compression reduces file size (and the reduction is often permanent in terms of the compressed state; the original can be restored, but the compressed file is a smaller representation), but the "temporarily" description is inaccurate. However, among the options, A and B are clearly true, and let's re - evaluate D. Actually, lossless compression is used to create a smaller file size (the compression is a transformation, and the original can be re - created, but the compressed file is a valid, smaller version). But the key is that A (text documents can be losslessly compressed, like ZIP for text files) and B (definition of lossless) are true. Wait, maybe I made a mistake with D. Let's think again: Lossless compression doesn't reduce size temporarily in the sense of "it will go back to original size on its own". But the question is which three are true? Wait, no, the options are four, and we need three. Wait, maybe my initial analysis of D is wrong. Let's re - examine:

Lossless compression:

- A: Text documents (like TXT files) can be losslessly compressed (e.g., using gzip or ZIP), so this is true.
- B: The fundamental property of lossless compression is that the original data can be exactly restored from the compressed data, so this is true.
- D: When you compress a file with lossless compression, the file size is reduced, and when you decompress, you get the original back. But the compressed file is a smaller version, and the reduction is not "temporary" in the sense that the compressed file is a valid, smaller file. However, maybe the question considers that the compression is a way to reduce size for storage/transmission, and when you need the original, you decompress. But the statement "It reduces the file size temporarily" – maybe in the context of using the file, you can compress it to save space, and then decompress when you need to use it, so the size reduction is temporary in terms of the file's usable state? But this is a bit of a stretch. However, let's check the standard definitions:

Lossless compression:

- Preserves all original data.
- Used for data where fidelity is crucial (text, medical images, etc.).
- The compressed file is a smaller representation, and the original can be reconstructed.

Now, let's re - assess each option:

A: True, text documents are commonly losslessly compressed (e.g., PDF can be losslessly compressed, ZIP for text files).

B: True, by definition.

D: If we consider that after compression, you can decompress to get the original size, so the size reduction is "temporary" in the sense that the original size is restored when decompressed. So maybe D is true.

C: False, as it's about broadcasting, not compression.

So then A, B, and D would be the three? Wait, but that seems odd. Wait, maybe I was wrong about D. Let's check a reference: Lossless compression algorithms reduce the size of the file without losing any information. The compressed file can be decompressed to get the original file. So the file size is reduced (the compressed file is smaller), and when you need the original, you decompress. So in terms of the file's existence, the compressed file is a smaller version, but the ability to get the original back means that the "reduction" is a way to store/transmit the file in a smaller size, and then restore it. So maybe D is considered true (the size reduction is temporary because you can get the original size back by decompressing). And C is false (broadcasting is not related to compression). So the three true statements are A, B, D? Wait, but let's check again:

- A: Used to reduce size of text documents – yes, because text has redundancy (e.g., repeated words, spaces) that can be losslessly compressed.
- B: Allows original data to be restored – yes, that's the definition of lossless.
- D: Reduces file size temporarily – if we consider that the compressed file is a temporary smaller version, and when you decompress, you get the original size, then this is true.
- C: Sends data to all devices – no, that's network broadcasting, not compression.

So the three true statements are A, B, D. Wait, but maybe I made a mistake. Alternatively, maybe D is false. Let's check a reliable source: Lossless compression is a method of data compression in which the original data can be perfectly reconstructed from the compressed data. It is used for compressing data where losing information is unacceptable, such as text, executables, and source code. The compressed file size is smaller, and when decompressed, the original file is restored. The "temporarily" in D – the file size reduction is not temporary in the sense that the compressed file is a valid file with smaller size, but the ability to restore the original means that the data's original size is recoverable. So maybe the question considers D as true (the size reduction is temporary because you can get the original size back). So the three true options are A, B, D.
# Answer:
A. It is used to reduce the size of text documents, B. It allows all of a file’s original data to be restored from the compressed data, D. It reduces the file size temporarily

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