You have one primary HMaster and one standby. Your primary HMaster Falls fails and your client
application needs to make a metadata change. Which of the following is the effect on your client
application?

You have an “Employees” table in HBase. The Row Keys are the employees’ IDs. You would like
to retrieve all employees who have an employee ID between ‘user_100’ and ‘user_110’. The shell
command you would use to complete this is:

The cells in a given row have versions that range from 1000 to 2000. You execute a delete
specifying the value 3000 for the version. What is the outcome?

You have an average key-value pair size of 100 bytes. Your primary access is random needs on
the table. Which of the following actions will speed up random reading performance on your
cluster?

You have a table with the following rowkeys:
r1, r2, r3, r10, r15, r20, r25, r30, r35
In which order will these rows be retrieved from a scan?

Data is written to the HLog in which of the following orders?

You have two standbys and one primary HMaster. Your primary HMaster fails. Which of the
remaining HMasters becomes the new primary?

Under default settings, which feature of HBase ensures that data won’t be lost in the event of a
RegionServer failure?

You need to create a “WebLogs” table in HBase. The table will consist of a single Column Family
called “Errors” and two column qualifiers, “IP” and “URL”. The shell command you should use to
create the table is:

Given that following is your entire dataset:

How many sets of physical files will be read during a scan of the entire dataset immediately
following a major compaction?