Linux Foundation LFCS Exam - Topic 1 Question 57 Discussion

Actual exam question for Linux Foundation's LFCS exam

Question #: 57
Topic #: 1

[All LFCS Questions]

Which of the following commands overwrites the bootloader located on /dev/sda without overwriting the partition table or any data following it?

Add if=/dev/zero of=/dev/sda bs=512

Bdd if=/dev/zero of=/dev/sda bs=512 count=1

Cdd if=/dev/zero of=/dev/sda bs=440 count=1

Ddd if=/dev/zero of=/dev/sda bs=440

Show Suggested Answer

Suggested Answer: C

by Cyril at Apr 19, 2023, 03:26 PM

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Dominga

4 months ago

C is interesting, but I’d stick with B for clarity.

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Karl

5 months ago

Count 1 is key here, right? Seems too simple.

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Caitlin

5 months ago

Wait, are you sure? I thought it was A.

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Marion

5 months ago

Definitely B, that’s the safest option!

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Adell

5 months ago

I think it's B, only overwrites the bootloader.

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Norah

5 months ago

I think it’s definitely between C and D, but I can't recall if the bootloader is 440 bytes or if it needs the extra space.

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Carlene

5 months ago

I’m a bit confused; I thought the bootloader was always at the start of the disk, so wouldn’t A overwrite more than just the bootloader?

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Henriette

5 months ago

I remember practicing with dd commands, and I feel like option C is the right one since it specifies the bootloader size.

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Tamra

5 months ago

I think the command that only affects the bootloader is the one with a count of 1, but I'm not sure if it's the one with bs=512 or bs=440.

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I feel pretty confident about this one. The scenario states that Delilah consented to the collection and use of her personal data, which would include her business contact info. As long as it was used internally and not shared externally, I think that's allowed.

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Lizette

6 months ago

Hmm, I think the key here is identifying the project interfaces and their potential impact on the budget. That should help guide the discussion with stakeholders.

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Jeff

11 months ago

Wait, are we trying to fix the bootloader or just play a prank on the computer? Cause I know a few 'creative' options that might be more fun...

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Crista

10 months ago

C) dd if=/dev/zero of=/dev/sda bs=440 count=1

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Denny

10 months ago

B) dd if=/dev/zero of=/dev/sda bs=512

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Cassie

10 months ago

A) dd if=/dev/zero of=/dev/sda bs=512 count=1

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Dyan

11 months ago

Option A looks like it'll do the trick. Gotta love the good ol' zero-fill method. Simple and effective!

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Merilyn

9 months ago

User 4: Let's go with option A then.

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Burma

9 months ago

User 3: I agree, it's a simple and effective solution.

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Fatima

9 months ago

User 2: Yeah, zero-fill method is always reliable.

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Francine

9 months ago

User 1: I think option A is the way to go.

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Quentin

10 months ago

User 4: Let's go with option A then.

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Tambra

10 months ago

User 3: I agree, it's simple and effective.

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Hildegarde

10 months ago

User 2: Yeah, zero-fill method is always reliable.

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Carole

10 months ago

User 1: I think option A is the way to go.

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Virgilio

11 months ago

Hmm, I'm leaning towards Option D. Why go for a specific count when you can just wipe the whole bootloader, right? Get the job done in one fell swoop!

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