Time complexity of sorting algorithms Selection Sort – Youtube Link From the beginning of an array, it finds minimum element in ...

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# P vs. NP

NP – Complete A problem p in NP is NP-complete if every other problem in NP can be transformed (or reduced) into p in polynomial time. It ...

# Euclid’s Algorithm

Euclid’s(Euclidean) Algorithm Algorithm to find GCD of two large numbers GCD(N1, N2), suppose that N1 is larger than N2 N1 = N2 * q1 + r1 ...

# FDMA, TDMA, and CDMA

FDMA (Frequency Division Multiple Access) Vary frequencies for each user. If number of users increases, it becomes complicated. TDMA (Time ...

# Bandwidth and Frequency

Bandwidth (bps – bits per second) Amount of data that can be transmitted in per unit time. Difference between highest frequency and lowest ...

# Latency vs. Jitter

Latency Amount of time it takes for a packet to travel from point A to point B(or round-trip). ex) Data Latency: time between a query and the ...

# Useful Git tips

Apply .gitignore on already pushed repository Disconnect local repository from remote Reset to specific commit Remove all ...

# vi Find & Replace

Range [%] All lines in the file. [1,30] line 1 to 30 [5,$] line 5 to last line Pattern This can be plain text and also regular expression. ...

# Useful Websites

CS university rankings by publications http://csrankings.org/ Regular Expression http://www.rexegg.com/regex-quickstart.html Tmux Tmux Cheatsheet ...

# [ ssh ] Public key vs. Private key

If you generate key with the command ssh–keygen -t rsa, you will get two types of key. Public key is for encrypting and private key is for ...