Question 1

A web application server contains 64GB of RAM and two swap partitions on normal hard

disk drives, each with a size of 64 GB. Within the last month, the average number of user

sessions on this server has grown by 20 percent. At the same time, the average usage of

RAM increased from 65 to 75 percent, while the swap space is almost not used at all. It is

expected that the number of user sessions will continue to increase by about 15 to 20

percent each month. Which of the following reactions would be appropriate in response to

these observations? (Choose two.)

Options :

A :

Delay any hardware upgrade until there is a significant consumption of swap space to

ensure an efficient usage of the available hardware

B :

Create a RAID 1 device on the two swap partitions to avoid data loss in case swap

space has to be used in the future

C :

Consider the installation of an additional application server to distribute the load if the

expected growth continues over several months

D : Move the web application’s scripts and content a ram disk in order to ensure fast access and to avoid the need for swap space

E : Update the hardware to increase the amount of available RAM to avoid using swap space

Answer: A,C

Question 2

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 3

When a makefile is included in a source code package, what are commonly defined targets

in the file?

Options :

A : CFLAGS, CPPFLAGS, LIBS, LDFLAGS

B :

clean, install, uninstall

C : PATHS, DESTDIR, LIBS, LDFLAGS

D : prefix, exec_prefix, bindir, mandir

Answer: B

Question 4

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 5

Which single command will simulate a failed device within a RAID 5 array?

Options :

A : mdadm --remove /dev/md0 /dev/sdd1

B : mdadm --zero-superblock /dev/sdf3

C : mdadm --force-fault /dev/md2 /dev/sde2

D : mdadm --fail /dev/md0 /dev/sdc1

E : mdadm /dev/md0 --offline /dev/sdc1

Answer: D

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