Mahmoud Hanafy mahmoudhossam

This is unmaintained and was created for personal use. As I passed the exam I have no use to keep this up to date. Feel free to fork

What are the consequences for a person driving a motor vehicle under the influence of drugs (e.g. hashish, heroin, cocaine)?

[x] Confiscation of driving licence or driving ban
[x] Compulsory medical/psychological examination
[x] Fine and/or imprisonment

In which instances do you have to approach a pedestrian crossing with particular care?

Exporting your 2FA tokens from Authy to transfer them into another 2FA application

IMPORTANT - Update regarding deprecation of Authy desktop apps

Past August 2024, Authy stopped supported the desktop version of their apps:
See Authy is shutting down its desktop app | The 2FA app Authy will only be available on Android and iOS starting in August for details.

And indeed, after a while, Authy changed something in their backend which now prevents the old desktop app from logging in. If you are already logged in, then you are in luck, and you can follow the instructions below to export your tokens.

If you are not logged in anymore, but can find a backup of the necessary files, then restore those files, and re-install Authy 2.2.3 following the instructions below, and it should work as expected.

How to recover lost Python source code if it's still resident in-memory

I screwed up using git ("git checkout --" on the wrong file) and managed to delete the code I had just written... but it was still running in a process in a docker container. Here's how I got it back, using https://pypi.python.org/pypi/pyrasite/ and https://pypi.python.org/pypi/uncompyle6

Attach a shell to the docker container

Install GDB (needed by pyrasite)

apt-get update && apt-get install gdb

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!

\

	class E(BaseException):
	def __new__(cls, args, *kwargs):
	return cls
	def a(): yield
	a().throw(E)


	#!/usr/bin/env bash
	# First line of the script is the shebang which tells the system how to execute
	# the script: http://en.wikipedia.org/wiki/Shebang_(Unix)
	# As you already figured, comments start with #. Shebang is also a comment.

	# Simple hello world example:
	echo Hello world! # => Hello world!

	# Each command starts on a new line, or after a semicolon:

	package jwtex

	import (
	"encoding/base64"
	"encoding/json"
	"fmt"
	"strings"
	"testing"
	)

	Python uses the os.py module as a sort of sentinel value to determine where the
	stdlib is. It will look in a relative directory first. So if you have a file
	structure like…

	.
	├── bin
	│ └── python
	└── lib
	└── python2.6
	└── os.py

	If tomorrow all the things were gone,
	I’d worked for all my life.
	And I had to start again,
	with just my children and my wife.

	I’d thank my lucky stars,
	to be livin here today.
	‘ Cause the flag still stands for freedom,
	and they can’t take that away.