1. How can you profile an entire Python application?
Answers
·
Use an @profile label
·
Use the guppy module
·
Use Memory Profiler
·
Use a decorator
2. Your application is
having difficulty sending and receiving large packets of data, which are also
delaying other processes when connected to remote computers. Which of the
following will be most effective in improving network traffic for the application?
Answers
·
Running the iftop program
·
Increase storage capacity
·
Increase memory capacity
·
Use traffic shaping
3. What is the term
referring to the amount of time it takes for a request to reach its
destination, usually measured in milliseconds (ms)?
Answers
·
Bandwidth
·
Latency
·
Number of connections
·
Traffic shaping
4. If your computer is
slowing down, what Linux program might we use to determine if we have a memory
leak and what process might be causing it?
Answers
·
top
·
gparted
·
iftop
·
cron
5. Some programs open a
temporary file, and immediately _____ the file before the process finishes,
then the file continues to grow, which can cause slowdown.
Answers
·
open
·
close
·
delete
· write to
6. Using the Eisenhower
Decision Matrix, which of the following is an example of an event or task that
is both Important, and Urgent?
Answers
·
Office gossip
·
Replying to emails
·
Internet connection is
down
·
Follow-up to a recently resolved issue
7. You’re working on a
web server issue that’s preventing all users from accessing the site. You then
receive a call from user to reset their user account password. Which
appropriate action should you take when prioritizing your tasks?
Answers
·
Reset the user’s password
·
Create a script to automate password
resets
·
Ask the user to open a
support ticket.
·
Ignore the user, and troubleshoot web
server.
8. What is it called
when we make more work for ourselves later by taking shortcuts now?
Answers
·
Technical debt
·
Ticket tracking
·
Eisenhower Decision Matrix
·
Automation
9. What is the first
step of prioritizing our time properly?
Answers
·
Work on urgent tasks first
·
Assess the importance of each issue
·
Make a list of all tasks
·
Estimate the time each task will take
10. If an issue isn't
solved within the time estimate that you provided, what should you do? (Select
all that apply)
Answers
·
Explain why
·
Drop everything and perform that task
immediately
·
Give an updated time
estimate
·
Put the task at the end of the list
11. Which proactive
practice can you implement to make troubleshooting issues in a program easier
when they happen again, or face other similar issues?
Answers
·
Create and update
documentation
·
Use a test environment.
·
Automate rollbacks.
·
Set up Unit tests.
12. Which of the
following is a good example of mixing and matching resources on a single server
so that the running services make the best possible use of all resources?
Answers
·
Run two applications that are CPU
intensive between two servers.
·
Run a CPU intensive application on one
server, and an I/O intensive application on another server.
·
Run a RAM intensive
application and a CPU intensive application on a server.
·
Run two applications that are RAM and
I/O intensive on a server.
13. One strategy for
debugging involves explaining the problem to yourself out loud. What is this
technique known as?
Answers
·
Monitoring
·
Rubber Ducking
·
Testing
·
Ticketing
14. When deploying
software, what is a canary?
Answers
·
A test for how components of a program
interact with each other
·
A test of a program’s components
·
A test deployment to a
subset of production hosts
·
A small section of code
15. It is advisable to
collect monitoring information into a central location. Given the importance of
the server handling the centralized collecting, when assessing risks from
outages, this server could be described as what?
Answers
·
A failure domain
·
A problem domain
·
CPU intensive
· I/O intensive
