Unix vs. Linux
These two terms are always confused and I also was not aware of all the details. In this post, i am sharing the summary of what I learned during my research ...
Posts by Year
2020
SSH, TLS, Mosh, Tmux, Eternal Terminal
I was using iTerm2 and connecting to my devservers through “ssh address_of_server”, however i realized that if i try to open more than one connection for the...
2019
Message Delivery Models in Distributed Systems
Exacly Once Delivery
2018
Java Volatile Keyword vs. Synchronized
This topic is greatly explained in [1], which is a very good Java blog. Here I’ll try to summarize those information in my own words to remember them in the ...
NLP Notes
4 Regular Expressions
Hadoop 101
Hadoop uses MR, structure unstructured semistructured
Apache-Kafka-Airline-Price-Notification-System
Apache Kafka is a distributed messaging system
What’s the difference between a thread and a process?
Xen, an x86 virtual machine monitor which allows multiple commodity operating systems to share conventional hardware in a safe and resource managed fashion, ...
What’s the difference between a thread and a process?
Processes and threads are related to each other but are fundamentally different.
Rules of Thumb of Data Engineering
This paper documents some of the main rules we use in engineering database systems.
NIST Definition of Cloud Computing
In this post I’ll share the official definition of the cloud computing defined by NIST, The National Institute of Standards and Technology.
Distributed Systems Lecture and Book Notes
Chapter 1 Introduction
Bayes Theorem and Naive Bayes Classifier
One of the hardest topics in NLP (Natural Language Processing) is the Sentiment Analysis topic. It is to decide whether the given document, sentence, aspect,...
Java Deque Implementation
The Stack and Queue classes in Java gets a little complex after they are combined in Deque interface, at least for me:) There was a Stack class used for stac...
Ever Wonder Ping TTL Time-to-Live
Have you ever wonder what is the meaning of TTL, that occurs when you ping a website. If you never cared about them, let’s briefly explain what it is.
CAP Theorem
Lately, I came accross with the CAP Theorem a few times so I want to read and learn about it. CAP states for Consistency, Availability, and Partition Toleran...
Java Try with Resources
The try-with-resources statement is a try statement that declares one or more resources. A resource is an object that must be closed after the program is fin...
Networking-101-For-Sofware-Engineers
The networking is always one of the hardest topic for the software engineers. There are too many jargon words around and the whole idea does not quite unders...
Confusing CORS Explained
I have always been confused with the CORS errors and in this post I’ll try to share my understanding of CORS for now.
Deep Learning Notes Convolutional Neural Networks
In this post, I’ll coptinue to share my notes in CS231N course that is thought at Stanford University.
Deep Learning Notes 5 Neural Networks Part 2
In this post, I’ll coptinue to share my notes in CS231N course that is thought at Stanford University.
Deep Learning Notes 2 Linear Classificaiton
In this post, I’ll coptinue to share my notes in CS231N course that is thought at Stanford University.
Deep Learning Notes 1 Classificaiton
In this post, I’ll share my notes in CS231N course that is thought at Stanford University.
Matrix Multiplication With MapReduce
MapReduce is a programming model that Google came up with to handle computation of their huge large scale data. It uses a distributed file system called GFS...
Finding Similar Items Notes From MMDS
In this post, I will share my notes for the Big Data Analytics course chapter three which is Finding Similar Items. A fundamental data-mining problem is to e...
The Must Know Topics from CTCI
I am reading Cracking The Coding Interview book again and there is a table that every one should know at basics. Today I am talking about them in a very basi...
The Good Read Blogs
This is the first post of 2018. I have created a tracker for myself, where I am planning to plan my life in weekly manner. One of my tracker is to write at l...
What is Network Address Translation
I made a list named “post topics”, where I am storing the topics that I would like to first learn and then share with you. Since I am in a PhD break, I will ...
2017
Git filter-branch experience
In our project, two of our collegues mistakenly pushed big files into our repository. One of them was a huge debian package, which was around 750 MB size and...
My First TensorFlow Experience
I am planning to make a PhD in Machine Learning if I will get accepted of course :) Therefore, these days I am planning to be attached to TensorFlow. Firstly...
A Gradle Challenge
At work we had a situation that some of our used shared project should be in the artifactory, but we do not have any artifactory yet :) So what we were doin...
Java Generics
Generics occured in https://www.hackerrank.com/challenges/30-generics/problem this challenge, so that I quickly want to remember that. Generic Types Generics...
Introduction to RabbitMQ
Let’s temper into RabbitMQ. Installation: Firstly, Erlang is required to install RabbitMQ server. Link is here: http://www.erlang.org/downloads. After su...
Sorting: Bubble Sort
Today’s Cracking the Coding Interview Challenge is Sorting: Bubble Sort. Sorting is one of the most important topics in SE. Bubble sort is the easiest sort...
Remember Heaps
Today’s Cracking the Coding Interview Challenge is Heaps: Find the Running Median. Heaps have always been a confusion for me. Today is the day to end this!...
Review Binary Trees and Binary Search Trees
Hi guys, In this post I will review the BT and BST topics. I’ve seen this problem in the Cracking the Coding Interview Trees: Is This a Binary Search Tree?...
Implementing a Queue from Two Stacks Algorithm
Hi guys, In this post I will talk about the implementing a queue data sturcture from existing data structures called stacks and I need to use two of them. I...
Java Cycle Detection Algorithm
Hi guys, In this post I will talk about the cycle detection in linked lists. I’ve seen this problem in the Cracking the Coding Interview Linked Lists: Det...
Java HashMap vs. HashTable
When I was solving the third challenge in Cracking the Coding Interview tasks in hackerrank, I’ve come accross with HashTables. Then I realized that I forge...
Java Anagram Making Algorithm
I’ve started to work on 30 days of coding challange in hackerrank. The 2nd challange I’ve solved was is “Given two strings, and , that may or may not be of t...
Array Left Rotation Algorithm in Java
While I was working in Hackerrank, today I’ve started to solve “Cracking the Coding Interview Challenges”. The first challenge is left rotating an array, he...
Quick Sort Algorithm in Java
Quick sort algorithm is a kind of divide and conquer algoritm. Quick sort is also known as Partition-exchange sort. There are three important elements in th...
Cracking the Coding Interview Study
Currently, I am re-thinking about working in Google or Amanzon like companies. Therefore, I am planning to study this great book. In the future, I will shar...
Insertion Sort Algorithm in Java
Average and worst complexity is O(N^2), so this algorthm is not suitable for large data sets. In this algorithm, elements are sorted one at a time. In real w...
Inner Class Nested Class Confusion in Java
Hello everyone, For a very long time, I could not really figure out the inner class or nested class stuff. In this post I’ll try to understand and write abo...
Next Permutation Algorithm in Java
In this post, I will tell you how to write the next permutation algorithm in Java. I’ve encountered this problem in one of the hackerrank challenge.. Java i...
Introduction to Data Structures and Algorithms
In this post, I’ll talk about the DS and Algorithms topic in general. These topics are the core of the “Computer Science”, so they need to be learn carefully...
BigInteger Recursive Combination Method
Hello guys, This post will be small. I just encounter a problem where I need to find combination of a number and results would be big that cannot be even st...
How to sort Java Map Collection
Today, I was dealing with another question, and I needed to sort a HashMap in Java. I realized that I’ve niether tried nor needed sorting a map in Java!. The...
MySQL Procedure vs. Function
One of the most mixed topics in sql word is the difference between procedure (also called stored procedures, because they are stored in the db :) ) and funct...
Remember SQL Function Creation
In this post, I will go over the SQL Function creation process, for this MySQL data types must also be revised. The mostly used MySQL data types are:
Finding K-complementary pairs in an integer array, Java
Hi, This is the second post today, it is again related with the interview question that I’ve received. The question is “Write an efficient algorithm to find...
Analysis of Java Palindrome Checking Algorithms
Today I’ve received a task from a company to get a remote job. One of the questions was, “Write an efficient algorithm to check if a string is palindrome, if...
M. Oğuz Özcan, Software Engineer, Launches His Personal Website
Finally I am creating my personal website and blog. I am planning to post things about new Java technologies. Powered by Jekyll