Moved OO and Design Patterns to main need-to-know area. Added notes about networking.

README.md

@@ -13,9 +13,14 @@ There are extra items I added at the bottom that may come up in the interview or
 Steve Yegge's "[Get that job at Google](http://steve-yegge.blogspot.com/2008/03/get-that-job-at-google.html)" and are reflected
 sometimes word-for-word in Google's coaching notes.
 
-I've pared down what you need to know from what Yegge says for new software engineers. If you have many years of experience, expect a harder interview.
+I've pared down what you need to know from what Yegge recommends. I've altered Yegge's requirements 
+from information received from my contact at Google. This is meant for **new software engineers** or those switching from 
+software/web development to software engineering (where computer science knowledge is required). If you have 
+many years of experience and are claiming many years of software engineering experience, expect a harder interview. 
 [Read more here](https://googleyasheck.com/what-you-need-to-know-for-your-google-interview-and-what-you-dont/).
 
+If you want to be a reliability engineer or systems engineer, study more from the optional list (networking, security).
+
 ---
 
 ## Table of Contents
@@ -66,6 +71,8 @@ I've pared down what you need to know from what Yegge says for new software engi
 - [Even More Knowledge](#even-more-knowledge)
     - [Recursion](#recursion)
     - [Dynamic Programming](#dynamic-programming)
+    - [Object-Oriented Programming](#object-oriented-programming)
+    - [Design Patterns](#design-patterns)
     - [Combinatorics (n choose k) & Probability](#combinatorics-n-choose-k--probability)
     - [NP, NP-Complete and Approximation Algorithms](#np-np-complete-and-approximation-algorithms)
     - [Caches](#caches)
@@ -100,11 +107,10 @@ I've pared down what you need to know from what Yegge says for new software engi
     - [Entropy](#entropy)
     - [Cryptography](#cryptography)
     - [Compression](#compression)
-    - [Networking](#networking) (if you have networking experience, expect questions)
+    - [Networking](#networking) (if you have networking experience or want to be a systems engineer, expect questions)
     - [Computer Security](#computer-security)
     - [Garbage collection](#garbage-collection)
     - [Parallel Programming](#parallel-programming)
-    - [Design patterns](#design-patterns)
     - [Messaging, Serialization, and Queueing Systems](#messaging-serialization-and-queueing-systems)
     - [Fast Fourier Transform](#fast-fourier-transform)
     - [Bloom Filter](#bloom-filter)
@@ -843,6 +849,56 @@ You'll get more graph practice in Skiena's book (see Books section below) and th
         - [ ] [Global pairwise sequence alignment (video)](https://www.coursera.org/learn/algorithmic-thinking-2/lecture/UZ7o6/global-pairwise-sequence-alignment)
         - [ ] [Local pairwise sequence alignment (video)](https://www.coursera.org/learn/algorithmic-thinking-2/lecture/WnNau/local-pairwise-sequence-alignment)
 
+- ### Object-Oriented Programming
+    - [ ] [Optional: UML 2.0 Series (video)](https://www.youtube.com/watch?v=OkC7HKtiZC0&list=PLGLfVvz_LVvQ5G-LdJ8RLqe-ndo7QITYc)
+    - [ ] Object-Oriented Software Engineering: Software Dev Using UML and Java (21 videos):
+        - Can skip this if you have a great grasp of OO and OO design practices.
+        - [OOSE: Software Dev Using UML and Java](https://www.youtube.com/playlist?list=PLJ9pm_Rc9HesnkwKlal_buSIHA-jTZMpO)
+    - [ ] SOLID OOP Principles:
+        - [ ] [Bob Martin SOLID Principles of Object Oriented and Agile Design (video)](https://www.youtube.com/watch?v=TMuno5RZNeE)
+        - [ ] [SOLID Design Patterns in C# (video)](https://www.youtube.com/playlist?list=PL8m4NUhTQU48oiGCSgCP1FiJEcg_xJzyQ)
+        - [ ] [SOLID Principles (video)](https://www.youtube.com/playlist?list=PL4CE9F710017EA77A)
+        - [ ] S - [Single Responsibility Principle](http://www.oodesign.com/single-responsibility-principle.html) | [Single responsibility to each Object](http://www.javacodegeeks.com/2011/11/solid-single-responsibility-principle.html)
+            - [more flavor](https://docs.google.com/open?id=0ByOwmqah_nuGNHEtcU5OekdDMkk)
+        - [ ] O - [Open/Closed Principal](http://www.oodesign.com/open-close-principle.html)  | [On production level Objects are ready for extension for not for modification](https://en.wikipedia.org/wiki/Open/closed_principle)
+            - [more flavor](http://docs.google.com/a/cleancoder.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BwhCYaYDn8EgN2M5MTkwM2EtNWFkZC00ZTI3LWFjZTUtNTFhZGZiYmUzODc1&hl=en)
+        - [ ] L - [Liskov Substitution Principal](http://www.oodesign.com/liskov-s-substitution-principle.html) | [Base Class and Derived class follow ‘IS A’ principal](http://stackoverflow.com/questions/56860/what-is-the-liskov-substitution-principle)
+            - [more flavor](http://docs.google.com/a/cleancoder.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BwhCYaYDn8EgNzAzZjA5ZmItNjU3NS00MzQ5LTkwYjMtMDJhNDU5ZTM0MTlh&hl=en)
+        - [ ] I - [Interface segregation principle](http://www.oodesign.com/interface-segregation-principle.html) | clients should not be forced to implement interfaces they don't use
+            - [Interface Segregation Principle in 5 minutes (video)](https://www.youtube.com/watch?v=3CtAfl7aXAQ)
+            - [more flavor](http://docs.google.com/a/cleancoder.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BwhCYaYDn8EgOTViYjJhYzMtMzYxMC00MzFjLWJjMzYtOGJiMDc5N2JkYmJi&hl=en)
+        - [ ] D -[Dependency Inversion principle](http://www.oodesign.com/dependency-inversion-principle.html) | Reduce the dependency In composition of objects.
+            - [Why Is The Dependency Inversion Principle And Why Is It Important](http://stackoverflow.com/questions/62539/what-is-the-dependency-inversion-principle-and-why-is-it-important)
+            - [more flavor](http://docs.google.com/a/cleancoder.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BwhCYaYDn8EgMjdlMWIzNGUtZTQ0NC00ZjQ5LTkwYzQtZjRhMDRlNTQ3ZGMz&hl=en)
+
+- ### Design patterns
+    - [ ] [Quick UML review (video)](https://www.youtube.com/watch?v=3cmzqZzwNDM&list=PLGLfVvz_LVvQ5G-LdJ8RLqe-ndo7QITYc&index=3)
+    - [ ] Learn these patterns:
+        - [ ] strategy
+        - [ ] singleton
+        - [ ] adapter
+        - [ ] prototype
+        - [ ] decorator
+        - [ ] visitor
+        - [ ] factory, abstract factory
+        - [ ] facade
+        - [ ] observer
+        - [ ] proxy
+        - [ ] delegate
+        - [ ] command
+        - [ ] state
+        - [ ] memento
+        - [ ] iterator
+        - [ ] composite
+        - [ ] flyweight
+    - [ ] [Chapter 6 (Part 1) - Patterns (video)](https://youtu.be/LAP2A80Ajrg?list=PLJ9pm_Rc9HesnkwKlal_buSIHA-jTZMpO&t=3344)
+    - [ ] [Chapter 6 (Part 2) - Abstraction-Occurrence, General Hierarchy, Player-Role, Singleton, Observer, Delegation (video)](https://www.youtube.com/watch?v=U8-PGsjvZc4&index=12&list=PLJ9pm_Rc9HesnkwKlal_buSIHA-jTZMpO)
+    - [ ] [Chapter 6 (Part 3) - Adapter, Facade, Immutable, Read-Only Interface, Proxy (video)](https://www.youtube.com/watch?v=7sduBHuex4c&index=13&list=PLJ9pm_Rc9HesnkwKlal_buSIHA-jTZMpO)
+    - [ ] [Series of videos (27 videos)](https://www.youtube.com/playlist?list=PLF206E906175C7E07)
+    - [ ] [Head First Design Patterns](https://www.amazon.com/Head-First-Design-Patterns-Freeman/dp/0596007124)
+        - I know the canonical book is "Design Patterns: Elements of Reusable Object-Oriented Software", but Head First is great for beginners to OO.
+    - [ ] [Handy reference: 101 Design Patterns & Tips for Developers](https://sourcemaking.com/design-patterns-and-tips)
+
 - ### Combinatorics (n choose k) & Probability
     - [ ] [Math Skills: How to find Factorial, Permutation and Combination (Choose) (video)](https://www.youtube.com/watch?v=8RRo6Ti9d0U)
     - [ ] [Make School: Probability (video)](https://www.youtube.com/watch?v=sZkAAk9Wwa4)
@@ -1019,26 +1075,6 @@ You'll get more graph practice in Skiena's book (see Books section below) and th
     - [paper](http://research.microsoft.com/en-us/um/people/lamport/pubs/paxos-simple.pdf)
 - [ ] [Consistent Hashing](http://www.tom-e-white.com/2007/11/consistent-hashing.html)
 - [ ] [NoSQL Patterns](http://horicky.blogspot.com/2009/11/nosql-patterns.html)
-- [ ] [Optional: UML 2.0 Series (vido)](https://www.youtube.com/watch?v=OkC7HKtiZC0&list=PLGLfVvz_LVvQ5G-LdJ8RLqe-ndo7QITYc)
-- [ ] OOSE: Software Dev Using UML and Java (21 videos):
-    - Can skip this if you have a great grasp of OO and OO design practices.
-    - [OOSE: Software Dev Using UML and Java](https://www.youtube.com/playlist?list=PLJ9pm_Rc9HesnkwKlal_buSIHA-jTZMpO)
-- [ ] SOLID OOP Principles:
-    - [ ] [Bob Martin SOLID Principles of Object Oriented and Agile Design (video)](https://www.youtube.com/watch?v=TMuno5RZNeE)
-    - [ ] [SOLID Design Patterns in C# (video)](https://www.youtube.com/playlist?list=PL8m4NUhTQU48oiGCSgCP1FiJEcg_xJzyQ)
-    - [ ] [SOLID Principles (video)](https://www.youtube.com/playlist?list=PL4CE9F710017EA77A)
-    - [ ] S - [Single Responsibility Principle](http://www.oodesign.com/single-responsibility-principle.html) | [Single responsibility to each Object](http://www.javacodegeeks.com/2011/11/solid-single-responsibility-principle.html)
-        - [more flavor](https://docs.google.com/open?id=0ByOwmqah_nuGNHEtcU5OekdDMkk)
-    - [ ] O - [Open/Closed Principal](http://www.oodesign.com/open-close-principle.html)  | [On production level Objects are ready for extension for not for modification](https://en.wikipedia.org/wiki/Open/closed_principle)
-        - [more flavor](http://docs.google.com/a/cleancoder.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BwhCYaYDn8EgN2M5MTkwM2EtNWFkZC00ZTI3LWFjZTUtNTFhZGZiYmUzODc1&hl=en)
-    - [ ] L - [Liskov Substitution Principal](http://www.oodesign.com/liskov-s-substitution-principle.html) | [Base Class and Derived class follow ‘IS A’ principal](http://stackoverflow.com/questions/56860/what-is-the-liskov-substitution-principle)
-        - [more flavor](http://docs.google.com/a/cleancoder.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BwhCYaYDn8EgNzAzZjA5ZmItNjU3NS00MzQ5LTkwYjMtMDJhNDU5ZTM0MTlh&hl=en)
-    - [ ] I - [Interface segregation principle](http://www.oodesign.com/interface-segregation-principle.html) | clients should not be forced to implement interfaces they don't use
-        - [Interface Segregation Principle in 5 minutes (video)](https://www.youtube.com/watch?v=3CtAfl7aXAQ)
-        - [more flavor](http://docs.google.com/a/cleancoder.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BwhCYaYDn8EgOTViYjJhYzMtMzYxMC00MzFjLWJjMzYtOGJiMDc5N2JkYmJi&hl=en)
-    - [ ] D -[Dependency Inversion principle](http://www.oodesign.com/dependency-inversion-principle.html) | Reduce the dependency In composition of objects.
-        - [Why Is The Dependency Inversion Principle And Why Is It Important](http://stackoverflow.com/questions/62539/what-is-the-dependency-inversion-principle-and-why-is-it-important)
-        - [more flavor](http://docs.google.com/a/cleancoder.com/viewer?a=v&pid=explorer&chrome=true&srcid=0BwhCYaYDn8EgMjdlMWIzNGUtZTQ0NC00ZjQ5LTkwYzQtZjRhMDRlNTQ3ZGMz&hl=en)
 - [ ] Scalability:
     - [ ] [Great overview (video)](https://www.youtube.com/watch?v=-W9F__D3oY4)
     - [ ] Short series:
@@ -1478,7 +1514,9 @@ You're never really done.
     - [ ] [Compressor Head videos](https://www.youtube.com/playlist?list=PLOU2XLYxmsIJGErt5rrCqaSGTMyyqNt2H)
     - [ ] [(optional) Google Developers Live: GZIP is not enough!](https://www.youtube.com/watch?v=whGwm0Lky2s)
 
-- ### Networking (videos)
+- ### Networking
+    - **if you have networking experience or want to be a systems engineer, expect questions**
+    - otherwise, this is just good to know
     - [ ] [Khan Academy](https://www.khanacademy.org/computing/computer-science/internet-intro)
     - [ ] [UDP and TCP: Comparison of Transport Protocols](https://www.youtube.com/watch?v=Vdc8TCESIg8)
     - [ ] [TCP/IP and the OSI Model Explained!](https://www.youtube.com/watch?v=e5DEVa9eSN0)
@@ -1516,34 +1554,6 @@ You're never really done.
     - [ ] [Coursera (Scala)](https://www.coursera.org/learn/parprog1/home/week/1)
     - [ ] [Efficient Python for High Performance Parallel Computing (video)](https://www.youtube.com/watch?v=uY85GkaYzBk)
 
-- ### Design patterns
-    - [ ] [Quick UML review (video)](https://www.youtube.com/watch?v=3cmzqZzwNDM&list=PLGLfVvz_LVvQ5G-LdJ8RLqe-ndo7QITYc&index=3)
-    - [ ] Learn these patterns:
-        - [ ] strategy
-        - [ ] singleton
-        - [ ] adapter
-        - [ ] prototype
-        - [ ] decorator
-        - [ ] visitor
-        - [ ] factory, abstract factory
-        - [ ] facade
-        - [ ] observer
-        - [ ] proxy
-        - [ ] delegate
-        - [ ] command
-        - [ ] state
-        - [ ] memento
-        - [ ] iterator
-        - [ ] composite
-        - [ ] flyweight
-    - [ ] [Chapter 6 (Part 1) - Patterns (video)](https://youtu.be/LAP2A80Ajrg?list=PLJ9pm_Rc9HesnkwKlal_buSIHA-jTZMpO&t=3344)
-    - [ ] [Chapter 6 (Part 2) - Abstraction-Occurrence, General Hierarchy, Player-Role, Singleton, Observer, Delegation (video)](https://www.youtube.com/watch?v=U8-PGsjvZc4&index=12&list=PLJ9pm_Rc9HesnkwKlal_buSIHA-jTZMpO)
-    - [ ] [Chapter 6 (Part 3) - Adapter, Facade, Immutable, Read-Only Interface, Proxy (video)](https://www.youtube.com/watch?v=7sduBHuex4c&index=13&list=PLJ9pm_Rc9HesnkwKlal_buSIHA-jTZMpO)
-    - [ ] [Series of videos (27 videos)](https://www.youtube.com/playlist?list=PLF206E906175C7E07)
-    - [ ] [Head First Design Patterns](https://www.amazon.com/Head-First-Design-Patterns-Freeman/dp/0596007124)
-        - I know the canonical book is "Design Patterns: Elements of Reusable Object-Oriented Software", but Head First is great for beginners to OO.
-    - [ ] [Handy reference: 101 Design Patterns & Tips for Developers](https://sourcemaking.com/design-patterns-and-tips)
-
 - ### Messaging, Serialization, and Queueing Systems
     - [ ] [Thrift](https://thrift.apache.org/)
         - [Tutorial](http://thrift-tutorial.readthedocs.io/en/latest/intro.html)