How to Return the Closest Number Multiple of 10 in C
The challenge
Given a number return the closest number to it that is divisible by 10.
Example input:
22
25
37
Expected output:
20
30
40
Technical Articles
In-depth guides, insights, and best practices for modern software engineering
How to Reverse Every Other Word in a String in C
The challenge
Reverse every other word in a given string, then return the string. Throw away any leading or trailing whitespace, while ensuring there …
Read Article →How to Solve Simple Beads Count in C
The challenge
Two red beads are placed between every two blue beads. There are N blue beads. After looking at the arrangement below work out the …
Read Article →How to Solve the Maze Runner in C
The challenge
Introduction
Welcome Adventurer. Your aim is to navigate the maze and reach the finish point without touching any walls. Doing so will …Read Article →
How to Take a Number and Sum It’s Digits Raied to the Consecutive Powers in C
The challenge
The number 89 is the first integer with more than one digit that fulfills the property partially introduced in the title of this …
How to Find the Middle Element in C
The challenge
You need to create a function that when provided with a triplet, returns the index of the numerical element that lies between the other …
Read Article →How to Invite More Women in C
The challenge
Task
King Arthur and his knights are having a New Years party. Last year Lancelot was jealous of Arthur, because Arthur had a date and …
Read Article →How to Build a Tower in C
The challenge
Build a pyramid-shaped tower, as an array/list of strings, given a positive integer number of floors. A tower block is represented with …
How to Calculate A Rule of Divisibility by 7 in C
The challenge
A number m of the form 10x + y is divisible by 7 if and only if x − 2y is divisible by 7. In other words, subtract twice the last digit …
Read Article →How to Categorize a New Member in C
The challenge
The Western Suburbs Croquet Club has two categories of membership, Senior and Open. They would like your help with an application form …
Read Article →Load Balancing Strategies for Distributed Systems
Master the art of distributing traffic efficiently across multiple servers and services in distributed architectures.
Understanding Load Balancing in …
Read Article →How to Solve Deodorant Evaporator in C
The challenge
This program tests the life of an evaporator containing a gas.
We know the content of the evaporator (content in ml), the percentage of …
Read Article →How to Find the Divisors in C
The challenge
Create a function named divisors/Divisors that takes an integer n > 1 and returns an array with all of the integer’s …
Terraform State Management: Advanced Patterns and Best Practices
Terraform state is both the most critical and most dangerous aspect of infrastructure as code. It’s your source of truth for what exists, but …
Read Article →Solving Love vs Friendship in C
The challenge
If a = 1, b = 2, c = 3 ... z = 26
Then l + o + v + e = 54
and f + r + i + e + n + d + s + h + i + p = 108
So friendship is twice as …
Terraform Testing and Validation: Quality Infrastructure Code
Infrastructure code needs the same quality assurance practices as application code, but testing infrastructure presents unique challenges. How do you …
Read Article →How to Bounce Balls in C
The challenge
A child is playing with a ball on the nth floor of a tall building. The height of this floor, h, is known.
He drops the ball out of the …
Read Article →How to Find the Capitals in C
The challenge
Instructions
Write a function that takes a single string (word) as argument. The function must return an ordered list containing the …
How to Empty and Delete an S3 Bucket using the AWS CLI
Option 1 – Using AWS CLI
Step 1
export bucketname='your-bucket-here'
Step 2
aws s3api delete-objects --bucket $bucketname --delete "$(aws …What ports to open for FSx connection to AWS Managed Active Directory
If you are creating a FSx file system, and want to connect it to AWS Managed Active Directory, then you will need to create a VPC Security Group with …
Read Article →Multi-Cloud Terraform: Managing Infrastructure Across Providers
Multi-cloud strategies are becoming increasingly common as organizations seek to avoid vendor lock-in, leverage best-of-breed services, and meet …
Read Article →How to Calculate Variance in Python
If you need to calculate variance in Python, then you can do the following.
Option 1 – Using variance() from Statistics module
import statistics
list …How to Calculate the Sum of a List in Python
If you need to calculate and get the sum of a list in Python, then you can do the following.
Option 1 – Using sum()
myList = [1, 2, 3, 4, 5, 6, 7, 8, …How to add a List to a Set in Python
If you need to add a list to a set in Python, then you can do the following:
Option 1 – Using Tuple
myset = set((1,2,3,4))
mylist = list(1,2,3]) …