Identify the correct command that will change the cardinality to three.

The Flex ASM instances in your four-node cluster currently have a cardinality of two. Identify the
correct command that will change the cardinality to three.

A.
$ srvctl modify asm –cardinality 3

B.
$ srvctl update asm –count=3

C.
$ srvctl modify asm –count 3

D.
$ srvctl modify flex count = 3

Explanation:
You can modify the Oracle ASM instance count , or cardinality, with the SRVCTL modify asm
command. For example:
$ srvctl modify asm -count 4
$ srvctl modify asm -count ALL
https://docs.oracle.com/database/121/OSTMG/asminst.htm#OSTMG95329

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C –

http://www.oracle.com/technetwork/articles/database/asm-odb12c-enhancements-2206102.html
You choose the “Use Oracle Flex ASM for storage” option for Flex ASM. It is also possible to convert an existing normal ASM instance to Flex ASM. The default number of ASM instances to run on the cluster is 3; so Oracle will choose any three nodes on the cluster to run the instances. The other nodes will become client nodes. The number of nodes where Oracle ASM runs is known as ASM Cardinality. You can check that by the srvctl tool.

$ srvctl config asm

And look for “ASM instance count”. If the ASM instances fail, the Oracle Clusterware automatically starts up enough ASM instances on other nodes to maintain the cardinality. You can also change the cardinality by the same tool:

$ srvctl modify asm -count 2

S. K. DAS

escaflowne

Have someone passed with these questions? Are they reliable ?

Good dump, got 94℅. There are 5 or 6 different questions, I recall 2:
Who is the owner of asm binaries ? – Root/grid/oracle/DBA?
Minimum number of IPs for a 3 node cluster with scan and gns?

max

Good dump, got 94%. Got about seven different questions. Unfortunately not the two DL already mentioned.

max

Remember an easy one: How many Hub nodes can you create in a cluster. One other questions was about backup/recover in RAC (with OCP knowledge solvable). One was about which commands exist for backup/restore for OCR. One about recommendation how may copies you should have for your OCR files.
Have fun and enjoy