Question 1

Due to extreme system use, a Linux system requires some additional swap space. To

initialize 5GB of additional swap space, which combination of commands should be used?

Options :

A :

dd if=/dev/zero of=/tmp/swapfile bs=1024 count=5120000; mkswap /tmp/swapfile; mount

/tmp/swapfile

B : dd if=/dev/zero of=/tmp/swapfile bs=1024 count=5120000; swapon /tmp/swapfile

C : dd if=/dev/zero of=/tmp/swapfile bs=1024 count=5120000; mkswap /tmp/swapfile; swapon /tmp/swapfile

D : touch -5G /tmp/swapfile; swapon /tmp/swapfile

E : mkswap /tmp/swapfile 512000; swapon /tmp/swapfile

Answer: C

Question 2

In this example output, which descriptions match the purpose of the free, buff and cache

columns? (Choose THREE correct answers.)

# vmstat 1 100

procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----

r b swpd free buff cache si so bi bo in cs us sy id wa

0 0 0 282120 134108 5797012 0 0 0 2 0 0 0 0 100 0

0 0 0 282120 134108 5797012 0 0 0 0 1007 359 0 0 100 0

0 0 0 282120 134108 5797012 0 0 0 0 1117 577 0 0 100 0

0 0 0 282120 134108 5797012 0 0 0 0 1007 366 0 0 100 0

Options :

A : Used swap space

B : RAM available for filesystem buffers

C : Available free RAM

D : RAM used for buffers

E :

RAM used for filesystem cache

Answer: A,C,D

Question 3

After the downloading patch-4.6.4.xz from http://kernel.org, what are the next steps to

prepare the build of a version 4.6.4 Linux kernel? (Choose two.)

Options :

A :

Uncompress the file and move the resulting directory to /usr/src/linux

B : Apply the patch file to the kernel source directory containing kernel version 4.6.0

C : Apply the patch file to the kernel source directory containing kernel version 4.6.3

D : Uncompress the file using xz to get the uncompressed patch file

Answer: A,D

Question 4

On a server running the 3.4.50-11 Linux kernel, which file in the /boot directory contains the

kernel configuration parameters?

Options :

A : config-linux-3.4.50-11

B : config-3.4.50-11

C : system-3.4.50-11

D :

vmlinuz-3.4.50-11

E :

rc.config-3.4.50-11

Answer: B

Question 5

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

Options :

A : It is included with the Linux kernel source code.

B :

The kernel modules are downloaded on demand as they are used during compilation.

C :

The kernel modules have their own release cycle and can be maintained separately

from the Linux kernel source.

D :

It is provided as a separate download alongside the Linux kernel source code of the

same version.

Answer: A

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