Defining Amazon ECS Task Placement Strategies
Understanding task placement strategies matters when you’re running ECS on EC2 instances (not Fargate) and want control over how tasks get …
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In-depth guides, insights, and best practices for modern software engineering
Deployment methods in AWS Elastic Beanstalk
– All at once – Deploy the new version to all instances simultaneously. All instances in your environment are out of service for a short time while …
Read Article →How to update NTP to sync clock on Linux
If you need to sync the clock on Linux using the central NTP clock service, you can do the following:
sudo service ntp stop
sudo ntpd -gq
sudo service …Data Partitioning Strategies for Distributed Systems
Master data partitioning techniques including sharding.
Understanding Data Partitioning
Data partitioning (also known as sharding) is the process of …
Read Article →Distributed Consensus Algorithms: Building Fault-Tolerant Systems
Master the algorithms that enable distributed systems to agree on shared state despite failures and network partitions.
The Consensus Problem
Before …
Read Article →How to Find IP Address Ranges used by Amazon S3
You can query the ip-ranges Amazon AWS URL, and parse the results through jq as follows:
Generic S3 IP Ranges
Query:
curl -s …How to Find the nth Reverse Number in Java
The challenge
Reverse Number is a number which is the same when reversed.
For example, the first 20 Reverse Numbers are:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, …How to Find the Sum of Intervals in Java
The challenge
Write a function called sumIntervals/sum_intervals() that accepts an array of intervals, and returns the sum of all the interval …
How to Find the Stray Number in Python
The challenge
You are given an odd-length array of integers, in which all of them are the same, except for one single number.
Complete the method …
Read Article →How to Find the EDID UUID of External Mac Monitors
You can issue the following command on an Apple Mac’s terminal to show the EDID UUID (unique serial number) of all attached external monitors: …
[Solved] jsii.errors.JSIIError: docker exited with status 1
If you get the following error while running AWS CDK:
raise JSIIError(resp.error) from JavaScriptError(resp.stack)
jsii.errors.JSIIError: docker …How to Filter a Number in C
The challenge
The number has been mixed up with the text. Your goal is to retrieve the number from the text, can you return the number back to its …
Read Article →How to Take a Ten Minute Walk in C
The challenge
You live in the city of Cartesia where all roads are laid out in a perfect grid. You arrived ten minutes too early to an appointment, so …
Read Article →How to Count Stats of a String in C
The challenge
You will be given a string and your task will be to return a list of ints detailing the count of uppercase letters, lowercase, numbers …
Read Article →How to Convert a String to the NATO Phonetic Alphabet in C
The challenge
You’ll have to translate a string to Pilot’s alphabet (NATO phonetic alphabet).
Input:
If, you can read?
Output:
India …
How to Add 1 to the Value of each Array in C
The challenge
Given an array of integers of any length, return an array that has 1 added to the value represented by the array.
- the array can’t …
How to Calculate the Sum of a Sequence in C
The challenge
Your task is to make function, which returns the sum of a sequence of integers.
The sequence is defined by 3 non-negative values: begin, …
Read Article →How to Solve the Sum of Triangular Numbers in C
The challenge
Your task is to return the sum of Triangular Numbers up-to-and-including the nth Triangular Number.
Triangular Number: “any of the …
Read Article →How to Determine if a String Only Contains Unique Characters in C
The challenge
Write a program to determine if a string contains only unique characters. Return true if it does and false otherwise.
The string may …
Read Article →How to Find the Maximum Multiple in C
The challenge
Given a Divisor and a Bound , Find the largest integer N , Such That ,
Conditions :
- N is divisible by divisor
- N is less than or equal …
How to Assign a Digital Cypher in C
The challenge
Digital Cypher assigns to each letter of the alphabet unique number. For example:
a b c d e f g h i j k l m
1 2 3 4 5 …How to Check for All Inclusive in C
The challenge
Input:
- a string
strng - an array of strings
arr
Output of function contain_all_rots(strng, arr) (or containAllRots or contain-all-rots): …
How to Solve for Factorial in C
The challenge
In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to …
Read Article →How to Create an Incrementer in C
The challenge
Given an input of an array of digits, return the array with each digit incremented by its position in the array: the first digit will be …
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