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#review (9) #AWS (7) #statistics (7) #coding-test (6) #new-grad (5) #networking (3) #Python (3) #cost-optimization (2) #ARM (2) #VPC (2) #aptitude-test (2) #interview (2) #pre-assignment (2) #executive-interview (2) #Samsung (2) #simulation (2) #Java (2) #Baekjoon (2) #codetree (2) #Windows (2) #Linux (2) #PATH (2) #environment-variables (2) #p-value (2) #variance (2) #KAIST (2) #graduate (2) #mechanical-engineering (2) #admission (2) #written-exam (2) #NAT Instance (2) #cost-saving (2) #t-test (2) #mean-test (2) #Graviton (1) #RDS (1) #NAT Gateway (1) #AWSSummit (1) #generative-AI (1) #CMP (1) #multi-cloud (1) #middleware (1) #Nginx (1) #API-Gateway (1) #cloud (1) #Hyundai (1) #CarCloud (1) #aptitude (1) #AI-interview (1) #video-interview (1) #Softeer (1) #APIGateway (1) #WebFlux (1) #encryption (1) #KTDS (1) #KT-Group (1) #SI (1) #korean-job-market (1) #LG (1) #LG-Electronics (1) #HA (1) #RD (1) #english-interview (1) #implementation (1) #algorithm (1) #rotation (1) #BFS (1) #spiral (1) #sort (1) #Samsung-Research (1) #Innovation-Center (1) #Device-Platform (1) #SK (1) #SKAX (1) #SKC&C (1) #SKCT (1) #group-discussion (1) #technical-interview (1) #central-limit-theorem (1) #CLT (1) #normal-distribution (1) #t-distribution (1) #CMD (1) #drive (1) #cd (1) #filesystem (1) #macOS (1) #zsh (1) #command not found (1) #confidence-interval (1) #interval-estimation (1) #Bayesian (1) #degrees-of-freedom (1) #population-variance (1) #estimation (1) #EC2 (1) #SSH (1) #troubleshooting (1) #FastAPI (1) #uvicorn (1) #ASGI (1) #GIL (1) #PyCharm (1) #hypothesis-testing (1) #test-statistic (1) #math (1) #solid-mechanics (1) #dynamics (1) #thermodynamics (1) #fluid-mechanics (1) #eigenvalue (1) #strength-design (1) #NavierStokes (1) #Couette (1) #conference (1) #KSME (1) #neural-network (1) #ANN (1) #PM2.5 (1) #air-quality (1) #Window-Learning (1) #AIC (1) #VIF (1) #environmental-engineering (1) #thesis (1) #MS SQL Server (1) #Oracle (1) #schema (1) #account-management (1) #DBA (1) #iptables (1) #nginx (1) #Ubuntu (1) #CentOS (1) #web-server (1) #python-oracledb (1) #cx_Oracle (1) #DPI-1047 (1) #AWS Graviton (1) #SQLAlchemy (1) #pip (1) #system-design (1) #Snowflake (1) #distributed-systems (1) #unique-ID (1) #concurrency (1) #SciPy (1) #statsmodels (1) #homoscedasticity (1) #normality (1) #uncertainty (1) #variability (1) #probability (1) #performance (1) #curl (1) #web-perf (1) #CWV (1) #LCP (1) #TTFB (1) #page-speed (1) #sips (1) #audit (1) #measurement (1)
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#ARM (2)
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#AWS (7)
- [AWS] NAT Gateway How-To & Setup Guide — Private Subnet Internet & Cost Optimization 2026-02-14
- [AWS] Cutting Infrastructure Costs by 55% — Graviton (ARM) Migration & Fixed-Cost Optimization 2026-02-12
- [AWS] EC2 SSH Error — Fixing UNPROTECTED PRIVATE KEY FILE (.pem chmod 400) 2026-02-08
- Nginx Install Guide — Ubuntu / CentOS (Specific Versions, Config Structure, Firewall) 2026-02-08
- [AWS] Cutting NAT Gateway Costs — Building a NAT Instance with iptables (Part 2) 2024-12-29
- [AWS] Cutting NAT Gateway Costs — Building a NAT Instance from an AMI (Part 1) 2024-12-28
- AWS Summit Seoul 2024 — A Backend Engineer's Field Notes (Generative AI · CMP · Middleware) 2024-06-13
#AWS Graviton (1)
#AWSSummit (1)
#BFS (1)
#Baekjoon (2)
#Bayesian (1)
#CLT (1)
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#Linux (2)
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#NAT Instance (2)
#Nginx (1)
#Oracle (1)
#PATH (2)
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#PyCharm (1)
#Python (3)
- Implementing t-Tests in Python with SciPy — One-Sample, Two-Sample (Student's·Welch's), Paired 2024-11-05
- Getting Started with Python FastAPI — Concepts, Install & Running on PyCharm (feat. uvicorn) 2024-10-20
- Installing Python on Windows + Setting the PATH — When 'python' Is Not Recognized 2024-10-14
#RD (1)
#RDS (1)
#SI (1)
#SK (1)
#SKAX (1)
#SKC&C (1)
#SKCT (1)
#SQLAlchemy (1)
#SSH (1)
#Samsung (2)
#Samsung-Research (1)
#SciPy (1)
#Snowflake (1)
#Softeer (1)
#TTFB (1)
#Ubuntu (1)
#VIF (1)
#VPC (2)
#WebFlux (1)
#Window-Learning (1)
#Windows (2)
#account-management (1)
#admission (2)
#air-quality (1)
#algorithm (1)
#aptitude (1)
#aptitude-test (2)
#audit (1)
#cd (1)
#central-limit-theorem (1)
#cloud (1)
#codetree (2)
#coding-test (6)
- Samsung Electronics Coding Test — Recurring Implementation Modules (Java) 2024-10-08
- Samsung Electronics Coding Test — 5 Attempts Recap (Samsung Research · Innovation Center · Device Platform) 2024-10-08
- [New Grad] SK AX (formerly SK C&C) — Coding Test + Interview (Final Offer) Recap (2023 H2) 2023-12-05
- [New Grad] Hyundai Motor — CarCloud Role — Coding Test + 1st Interview (Rejected) Recap (2023 H1) 2023-05-12
- [New Grad] LG Electronics — Coding Test + 1st/2nd Interview (Rejected) Recap (2022 H2) 2022-12-15
- [New Grad] KT DS — Coding Test + Interview (Final Offer) Recap (2021 H2) 2021-12-22
#command not found (1)
#concurrency (1)
#conference (1)
#confidence-interval (1)
#cost-optimization (2)
#cost-saving (2)
#curl (1)
#cx_Oracle (1)
#degrees-of-freedom (1)
#distributed-systems (1)
#drive (1)
#dynamics (1)
#eigenvalue (1)
#encryption (1)
#english-interview (1)
#environment-variables (2)
#environmental-engineering (1)
#estimation (1)
#executive-interview (2)
#filesystem (1)
#fluid-mechanics (1)
#generative-AI (1)
#graduate (2)
#group-discussion (1)
#homoscedasticity (1)
#hypothesis-testing (1)
#implementation (1)
#interval-estimation (1)
#interview (2)
#iptables (1)
#korean-job-market (1)
#macOS (1)
#math (1)
#mean-test (2)
#measurement (1)
#mechanical-engineering (2)
#middleware (1)
#multi-cloud (1)
#networking (3)
#neural-network (1)
#new-grad (5)
- Samsung Electronics Coding Test — 5 Attempts Recap (Samsung Research · Innovation Center · Device Platform) 2024-10-08
- [New Grad] SK AX (formerly SK C&C) — Coding Test + Interview (Final Offer) Recap (2023 H2) 2023-12-05
- [New Grad] Hyundai Motor — CarCloud Role — Coding Test + 1st Interview (Rejected) Recap (2023 H1) 2023-05-12
- [New Grad] LG Electronics — Coding Test + 1st/2nd Interview (Rejected) Recap (2022 H2) 2022-12-15
- [New Grad] KT DS — Coding Test + Interview (Final Offer) Recap (2021 H2) 2021-12-22
#nginx (1)
#normal-distribution (1)
#normality (1)
#p-value (2)
#page-speed (1)
#performance (1)
#pip (1)
#population-variance (1)
#pre-assignment (2)
#probability (1)
#python-oracledb (1)
#review (9)
- KSME Conference Review — Neural-Net PM2.5 Prediction (Gold Award, KSME Fluid Mechanics Competition, 2019) 2024-10-09
- Samsung Electronics Coding Test — 5 Attempts Recap (Samsung Research · Innovation Center · Device Platform) 2024-10-08
- AWS Summit Seoul 2024 — A Backend Engineer's Field Notes (Generative AI · CMP · Middleware) 2024-06-13
- KAIST Mechanical Engineering Grad Written Exam — Part 1: Set 1 (5 Problems, 2019) 2024-05-17
- KAIST Mechanical Engineering Grad Written Exam — Part 2: Set 2 (5 Problems, 2019) 2024-05-17
- [New Grad] SK AX (formerly SK C&C) — Coding Test + Interview (Final Offer) Recap (2023 H2) 2023-12-05
- [New Grad] Hyundai Motor — CarCloud Role — Coding Test + 1st Interview (Rejected) Recap (2023 H1) 2023-05-12
- [New Grad] LG Electronics — Coding Test + 1st/2nd Interview (Rejected) Recap (2022 H2) 2022-12-15
- [New Grad] KT DS — Coding Test + Interview (Final Offer) Recap (2021 H2) 2021-12-22
#rotation (1)
#schema (1)
#simulation (2)
#sips (1)
#solid-mechanics (1)
#sort (1)
#spiral (1)
#statistics (7)
- Understanding Hypothesis Testing — Test Statistic, Null/Alternative, p-value, Significance Level, Critical Value 2026-05-27
- Implementing t-Tests in Python with SciPy — One-Sample, Two-Sample (Student's·Welch's), Paired 2024-11-05
- The Central Limit Theorem — Definition, Experiments, and Uses 2024-11-03
- Testing Means — the t-test (One / Two: Student's·Welch's / Paired) 2024-11-03
- Confidence Intervals — Meaning, Intuition, and a Common Misconception 2024-10-13
- What Are Degrees of Freedom — Why We Divide by n-1 to Estimate Variance 2024-09-30
- Uncertainty, Variability & Variance — Understanding the Nature of Probability 2024-09-30