February 2024 Flashcards

1
Q

SCMS

A

Secure Credential Management System

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2
Q

CONOPS

A

Concept of Operations

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3
Q

NGINX (4 common uses)

A

A web server, commonly used as…
reverse proxy
load balancer
mail proxy
HTTP cache

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4
Q

gunicorn

A

Green Unicorn is a Python Web Server Gateway Interface (WSGI) HTTP Server. Often paired with NGINX.

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5
Q

AWS IAM Groups Gotcha

A

Groups cannot contain groups

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6
Q

SCP (AWS Context)

A

Service Control Policies (only inside AWS Organizations, there are other perm-management control elsewhere)

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7
Q

Protocols supported by the Application Load Balancer (AWS)

A

HTTP, HTTPS, WebSocket

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8
Q

Protocols supported by the Network Load Balancer (AWS)

A

TCP, TLS (secureTCP), UDP

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9
Q

AWS IAM Advanced Policies (6)

A

aws:SourceIp
aws:RequestedRegion
ec2:ResourceTag/Project
aws:PrincipalTag/Department
aws:MultiFactorAuthPresent
aws:PrincipalOrdID

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10
Q

AWS IAM Advanced Policy Gotcha with S3 actions

A

Targeting buckets bucket-name-path
Targeting objects bucket-name-path/*

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11
Q

HDF5 (5 “things”)

A

Hierarchical Data Format
HDF5 is the latest version
B-tree indexing
resources are accessed POSIX style
faster than a RDB

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12
Q

AWS Route53 Health checks (3 kinds)

A

Health Checks
Calculated Health Checks (aggregate of health checks)
Cloudwatch Health Checks

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13
Q

AWS Draining

A

Concept of when an EC2 instance is going down. It must first serve all pending requests.

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14
Q

AWS Dynamic Scaling Policies (4)

A

Target Tracking Scaling
Simple/Step Scaling
Scheduled Actions
Predictive Scaling (ML based)

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15
Q

AWS Good Typical metrics to use to drive Scaling (4)

A

CPU utilization
Request Count Per Target
Avg. Network In/Out
Custom Cloud Watch

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16
Q

AWS Scaling Cooldown (and default)

A

Default is 300 s (5 mins). Cool off after a scaling event, so you don’t get cascading scaling. (don’t be too fast)

17
Q

Delete old branch (Git, 3 steps, first in English, then Git commands)

A

Checkout main
push delete command to remote/origin
fetch prune

git checkout main
git push origin –delete branch
git fetch -p

18
Q

Best way to pull in changes from main (if you are the only one using the branch)

A

git checkout branch
git rebase main

deal with conflicts

19
Q

Merge a branch into main

A

git checkout main
git merge branch

20
Q

Difference between git revert & git reset

A

git reset just pushes the HEAD pointer to the requested spot. This is OK to do when working in your private branch.
git revert just undoes a particular changeset and creates a new change to track those undo changes. This is the preferred method.

21
Q

GPS Radio Frequencies (names & MHz)

A

L1 - 1575.42 MHz L2 - 1227.60 MHz

22
Q

M.2

A

The next gen SATA replacement (primarily for SSDs)

23
Q

CATARC

A

China Automotive Technology and Research Center

24
Q

KATRI

A

Korea Automobile Testing & Research Institute

25
Q
A