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Problem Statement − Use Boto3 library in Python to get the list of all buckets present in AWSExample − Get the name of buckets like – BUCKET_1, BUCKET2, BUCKET_3Approach/Algorithm to solve this problemStep 1 − Import boto3 and botocore exceptions to handle exceptions.Step 2 − Create an AWS session using Boto3 library.Step 3 − Create an AWS client for S3.Step 4 − Use the function list_buckets() to store all the properties of buckets in a dictionary like ResponseMetadata, bucketsStep 5 − Use for loop to get only bucket-specific details from the dictionary like Name, Creation Date, etc.Step 6 − Now, retrieve ... Read More
Problem Statement − Use boto3 library in Python to get the list of all buckets present in AWS.Example − Get the name of buckets like – BUCKET_1, BUCKET2, BUCKET_3Approach/Algorithm to solve this problemStep 1 − Import boto3 and botocore exceptions to handle exceptions.Step 2 − Create an AWS session using Boto3 library.Step 3 − Create an AWS resource for S3Step 4 − Use the function buckets.all() to list out the bucket names.Step 5 − Handle any unwanted exception, if it occursStep 6 − Return the list of buckets_namevExampleThe following code gets the list of buckets present in S3 −import boto3 ... Read More
In this article, we will see how you can use Boto3 library in Python to connect with different AWS services.ExampleConnect with AWS S3.Connect with AWS Glue JobConnect with AWS SQS and many more.Approach/Algorithm to solve this problemStep 1 − Create an AWS session using Boto3 library.Step 2 − Pass the AWS service name in client to get a low-level service access.Or, pass the AWS service name in resource to get high-level object-oriented service access/highlevel interface.ExampleThe following code connects with different AWS services −import boto3 # To get AWS Client def getconnection_AWSClient(service_name): session = boto3.session.Session() # User can pass ... Read More
When a user wants to use AWS services using lambda or programming code, a session needs to set up first to access AWS services.An AWS session could be default as well as customized based on needs.Problem Statement − Use Boto3 library in Python to create an AWS session.Approach/Algorithm to solve this problemStep 1 − To create an AWS session, first set up authentication credentials. Users can find it in IAM console or alternatively, create the credential file manually. By default, its location is at ~/.aws/credentialsExample[default] aws_access_key_id = YOUR_ACCESS_KEY aws_secret_access_key = YOUR_SECRET_ACCESS_KEY aws_session_token = YOUR_SESSION_TOKEN region = REGION_NAMEStep 2 − Install ... Read More
Super Ugly NumberSuper ugly numbers are positive numbers whose all prime factors are in the given prime list primes of size k. For example, [1, 2, 4, 7, 8, 13, 14, 16, 19, 26, 28, 32] is the sequence of the first 12 super ugly numbers given primes = [2, 7, 13, 19] of size 4.ProblemWe are required to write a JavaScript function that takes in number, num, as the first argument and an array, arr, of prime numbers as the second argument. The function should find and return the (num)th super ugly number.ExampleThe code for this will be −const ... Read More
ProblemWe are required to write a JavaScript function that takes in an array of Numbers as the first and the only argument.Our function should prepare a new array based on the input array. And each corresponding element of this new array should be the count of elements smaller than the corresponding element in the original array.For example, if the input to the function is −const arr = [4, 7, 1, 4, 7, 5, 3, 8, 9];Then the output should be −const output = [2, 4, 0, 1, 2, 1, 0, 0, 0];Output Explanation:Because number smaller than 4 to its right ... Read More
ProblemWe are required to write a JavaScript function that takes in a string, str, as the only argument.The function should prepare a new string based on the input string in which the only one appearance of each character is kept and the character kept is the one which makes the result string lexicographically the smallest.For example, if the input to the function is −const str = 'cbacdcbc';Then the output should be −const output = 'acdb';Output Explanation:Note that we could have removed any occurrence of ‘c’ from the string but we removed the very first, which makes the string lexicographically the ... Read More
ProblemWe are required to write a JavaScript function that takes in an array of strings (only lowercase string alphabets) as the first and the only argument.The function should pick two such strings from the array that shares no common characters and have the maximum product of their lengths. And then our function should return the length product of two such strings. If there exist no such strings in the array, we should return 0.For example, if the input to the function is −const arr = ["karl", "n", "the", "car", "mint", "alpha"];Then the output should be −const output = 20;Output Explanation:The ... Read More
ProblemConsider this following situation −There are n bulbs that are initially off. We first turn on all the bulbs. Then, we turn off every second bulb. On the third round, we toggle every third bulb (turning on if it's off or turning off if it's on).In general, for the ith round, we toggle every i bulb. And lastly for the nth round, we only toggle the last bulb.We are required to write a JavaScript function that takes n as the only input and finds out how many bulbs are on after n rounds.For example, if the input to the function ... Read More
ProblemWe are required to write a JavaScript function that takes in two arrays of single digit numbers representing two numbers, arr1 and arr2 as the first and second argument. The third argument to the function will be a number, num (num { const map = new Map(); const match = (a, b, num) => { if (map.has(a + ', ' + b + ', ' + num)) { return map.get(a + ', ' + b + ', ' + num); } let output = ... Read More