201-450 Free Practice Test

What is a key difference between a zImage and bzImage kernel image?

1. A. zImage is compressed using gzip, bzImage is compressed using bzip2.
2. B. zImage is for 2.6 series kernels, bzImage is for 3.x series kernels.
3. C. zImage is limited to 64k, bzImage has no such restriction.
4. D. zImage gets loaded completely into low memor
5. E. bzImage will load into high memory once low memory is full.

Correct Answer: D

What keyword is missing in the following line from /etc/fstab in order to make a USB flash device writeable by the user fred when mounted:
/dev/sda1 /mnt/usbflash vfat defaults,users, _____ =fred,umask=022, 0 0 (Provide the option name only without any settings)
Solution:
uid

Does this meet the goal?

1. A. Yes
2. B. No

Correct Answer: A

How is the source code for the main Linux kernel modules distributed?

1. A. It is included with the Linux kernel source code.
2. B. The kernel modules are downloaded on demand as they are used during compilation.
3. C. The kernel modules have their own release cycle and can be maintained separately from the Linux kernel source.
4. D. It is provided as a separate download alongside the Linux kernel source code of the same version.

Correct Answer: A

After installing a compiled kernel, it can not find any modules that are needed to be loaded. What make target was likely missed while installing the kernel?
Solution:
make modules_install, modules_install

Does this meet the goal?

1. A. Yes
2. B. No

Correct Answer: A

In the following output from top, which processes contribute to the percentage of time that the CPU spends in the state of wa?
Tasks: 193 total, 1 running, 190 sleeping, 2 stopped, 0 zombie
Cpu(s): 0.5%us, 0.3%sy, 0.0%ni, 98.2%id, 1.0%wa, 0.0%hi, 0.0%si, 0.0%st

1. A. Processes waiting for user interaction.
2. B. Processes that were already closed and are waiting to be launched again.
3. C. Processes that have not been scheduled yet because they haven't been fully loaded into RAM or are in swap.
4. D. Processes waiting for IO operations to complete.

Correct Answer: D