5-6 years back Java was said to be ever lasting. Everyone wanted a Java developer in their team. Looking at the current scenario, we can safely assume that Python is and will be one of the most used Programming language across ...
Continue readingGuesstimate 3 – What are the number of smartphones sold in India per year?
Population of India : 1200 mn Population above poverty line: 70% 840 mn Population below 14 years: 30% Hence, proxy figure: 588 mn Rural Population (70%) ...
Continue readingGuesstimate 2 – How many laptops are sold in Bangalore in a day?
What is the number of laptops sold in Bangalore on an average routine day? Laptop is a costly product. I am assuming that people buy laptop only when they needed. That's why i am going ...
Continue readingGuesstimate 1 – How many t-shirts are sold in India per day?
How many t-shirts e-commerce companies selling in India per day? We can approach this problem in two ways: Demand side Supply side I am going to solve using demand of t-shirts in the market Total population of india : ...
Continue readingExponential Smoothing (ETS) Forecasting in layman terms
Exponential Smoothing is a technique to make forecasts by using a weighted mean of past values, wherein more recent values are given higher weights. Now, let's try to unpack that statement and actually understand it.
Continue readingWeb Analytics Basics and Terminologies
Web Analytics is a complete world in itself. It makes life easier for the client as well as the developer. The Fortune 500 companies spent a hell lot of money to get a handful of insight. We will ...
Continue readingDeloitte Data Scientist Interview Questions | Day 21
Day 21 - Deloitte Data Scientist Interview QuestionsToday we will look into the complete procedure of Deloitte recruitment. Let's start with Deloitte Data Scientist ...
Continue readingAccenture Business Analyst Interview Question | Day 22
Today is Day 22 and we will work on the complete Accenture Business Analyst Interview QuestionCompany Name - Accenture Location - ...
Continue readingSupervised Learning Questions – Part 4/4
Supervised Learning Questions. This is the 4th part of the Supervised Learning Questions. Do go through the first 3 parts.Part 1-http://thedatamonk.com/supervised-learning-interview-questions/Part 2 - http://thedatamonk.com/supervised-learning-interview-question/Part 3- http://thedatamonk.com/supervised-learning-data-science-questions/ 1.We will try to build a ...
Continue readingSupervised Learning Data Science Questions – Part 3/4
Supervised Learning Data Science Questions. This is the third part of the series Supervised Learning Data Science Questions.Part 1-http://thedatamonk.com/supervised-learning-interview-questions/Part 2-http://thedatamonk.com/supervised-learning-interview-question/Part 4-http://thedatamonk.com/supervised-learning-questions/ 1. What is Logistic Regression? Logistic Regression is a Machine Learning ...
Continue readingSupervised Learning Interview Question – Part 2/4
Supervised Learning Interview Question. This is the 2nd part of the series Supervised Learning Interview QuestionPart 1-http://thedatamonk.com/supervised-learning-interview-questions/Part 3- http://thedatamonk.com/supervised-learning-data-science-questions/Part 4-http://thedatamonk.com/supervised-learning-questions/ 1. Let’s create our dataset first. We will create Thyroid data set ...
Continue readingSupervised Learning Interview Questions – Part 1/4
Supervised Learning Interview Questions.Below are some of the most asked and basic Supervised Learning Interview Questions. Do go through all the questionsPart 2-http://thedatamonk.com/supervised-learning-interview-question/Part 3- http://thedatamonk.com/supervised-learning-data-science-questions/Part 4-http://thedatamonk.com/supervised-learning-questions/ 1. What is Machine Learning ?a. ...
Continue readingBookMyShow Data Scientist Interview Question
Company Name – BookmyshowLocation - BangalorePosition – Data Scientist Number of Rounds – 4 Round 1 – Written Open book SQL and R/Python roundRound 2 – Case ...
Continue readingAmazon Interview Questions
Company Name - AmazonLocation - BangalorePosition – Business Analyst Number of Rounds - 3Round 1 – Telephonic Round on Technical CapabilitiesRound 2 ...
Continue readingSapient Interview Question
Company Name - SapientLocation - BangalorePosition – Assistant Manager AnalyticsSalary – 12.5 LPA Number of Rounds - 4 Round 1 – ...
Continue readingNLP Interview Questions
1. What problems can NLP solve?NLP can solve many problems like, automatic summarization, machine translation, named entity recognition, relationship extraction, sentiment analysis, speech recognition, and topic segmentation etc.2. What are the common patterns used in regular expression? \w+ ...
Continue readingTF-IDF and Word correlation
What is tf-idf? Term frequency and inverse document frequency. It is to remove the most common words other than stop words which are there in a particular document, so this is document specific.
Continue readingNatural Language Processing in Python? What and Hows about NLP
NLP stands for Natural Language Processing which is a subdomain of Data Science and it helps you in extracting insights from organized or un-organized data.Have you ever wondered how a chatbot interacts with you so efficiently ...
Continue readingUnderstanding Linear Regression
Linear Regression is one of simplest, basic algorithm you would wish to start your learning with. But let me remind you, the concept of linear regression is with us way before machine learning and AI caught our attention! ...
Continue readingHow to calculate the performance of your model?
To understand the performance of a model you need to start with Confusion matrix. If you have escaped it below, then you can go through it again. A confusion matrix is a summary of prediction ...
Continue readingBefore you start Modeling – Feature Engineering
Feature Engineering is one place where you have to put in a lot of efforts. In the beginning of any project, you will have very less data, but then you need to dig in and torture the data ...
Continue readingWhat are training and test datasets?
Suppose you have 1000 rows of data and you want to make a model to predict whether a person is suffering from Thyroid. There are 15 columns with 15th one being a binary variable of 0(Normal) and 1 ...
Continue readingFlipkart Interview Questions
Position – Data ScientistLocation – BangaloreNumber of Rounds – 5 Round 1 - Aptitude and Logical ReasoningRound 2 - Case Study (Non-Elimination Round)Round 3 – Technical Interview SQL and PythonRound 4 – Project discussionRound 5 - Human ResourceRound ...
Continue readingSupply Chain Analytics in Python
Let’s take a case study of Supply Chain optimization. There is a Restaurant which serves Mega Pizza (40”). It has one oven, 3 bakers, and 1 packer. Following is the time required by each Pizz ...
Continue readingSupervised Learning Overview
window.dojoRequire(["mojo/signup-forms/Loader"], function(L) { L.start({"baseUrl":"mc.us17.list-manage.com","uuid":"e278f0e036c94ada952fffdf7","lid":"91b05372c4","uniqueMethods":true}) }) The word "Supervised" means monitoring. A supervised learning algorithm is one in which you train a data set on output and then the model takes up these ...
Continue readingWhat is Machine Learning?
Big Data, Machine Learning, Artificial Intelligence, etc. If you are regular with news, then you must have heard a lot about these words. Let's try to understand things with examplesWhat is Big Data?In 1990s the size of data ...
Continue readingCommon Statistical Tests
There are various statistical tests in Data Analysis, following are the tests and their use:-1. Correlation -> ...
Continue readingR – Cheat Sheet
This is a cheat sheet which aims on giving all the important concepts in a very crisp manner. Just give it a read before starting a new project ...
Continue readingVisualization in Python Part 2
We have already plotted some basic graphs. Now it's time to plot some more graphs:- Line Histogram Now let’s create a line histogram with some random dataimport matplotlib.pyplot as plt import numpy as np ...
Continue readingVisualizations in Python
Data visualization is the discipline of trying to understand data by placing it in a visual context so that patterns, trends and correlations that might not ...
Continue readingReading and Writing files in Python
You always have to read and write files when working for a company or Hackathon. So, it's necessary to know how to read different types of files.Let's start the boring but important partThe most important command to open ...
Continue readingTricky Interview Questions (Python)
The reason why I put interview questions as the title of a lot of posts is because:-1. It makes you click on the post2. It makes you feel ...
Continue readingFunctions in Python
Welcome to the world of Functions. This is undoubtedly the most important topic of your Data Science career :PFunction will make your life easy and your peer's life easier !!Toh shuru karte hain, bina kisi bakchodi ke(Let's start ...
Continue readingLoop in Python
Loop and functions are two most important topics in the basics of Python. You need to have a really good hand on loop and functions.Loop is basically ...
Continue readingPython – Conditional Statements
One of the most important thing which you need to learn in Python is the use of conditional statement. These are small code snippets which will help you solve multiple problems in a project or any hackathon.Conditional statements ...
Continue readingPython Basics
We know that you already know a lot about Python and it's capability in the Data Science domain. I have deliberately put screenshots so that you ...
Continue readingWelcome to Python
5-6 years back Java was said to be ever lasting. Everyone wanted a Java developer in their team. Looking at the current scenario, we can safely assume that ...
Continue readingTests in Statistics – Chi Square Test
Hypothesis testing is one of the most important topic in a Data Science course. Hypothesis tests evaluates two ...
Continue readingBasic Statistics
Data Science is 60% Mathematics and 40% coding and other things. Obviously, the numbers are random, but it makes complete sense. You need to defend your ...
Continue readingSQL Theoretical Questions
Following are the top 100 SQL Questions to clear your theoretical concepts. Few questions will be repeated from Day 10, 11, and 12. 1. What is a database?-A database is a collection of information in an organized form ...
Continue readingSQL one table 30 questions
SQL is your bread and butter. Let's take a table and try to answer few questions ranging from very basic to intermediate level.Emp Table - Employees at ...
Continue readingSQL Tricky Questions
You are already done with the basics of SQL on Day 10. No matter how good you are at it, there are some tricky questions which might confuse you in its trap. Below are some not so difficult ...
Continue readingSQL Basics to get you started
SQL stands for Structured Query Language and it is used to pull relevant data from the database. We assume that you already know a bit about SQL, so we will try to cover the base and then will ...
Continue readingIntroduction to Data Science, How to start?
We will keep posting Guesstimates, Case Studies, Puzzles, etc. But it's high time we should start with Data Science.On an overall level we can safely divide a ...
Continue readingPuzzles and aptitude problem
Why add puzzles and logical problem in a Data Science course?Well, because you are supposed to solve problems of the same intensity on the floor.Well, because you need to chisel your logic every now and then.Well, because these ...
Continue readingPractice Guesstimate
You already know that there are some 100 Million iPad being sold in India each year. But can you guess the area of an airport? Let's say I need to know the total area of the Bangalore airport.There ...
Continue readingGuesstimate
Guesstimate is a methodological process of guess and estimate. Guesstimates have now become an important part of several Business Analyst/Data Scientist and MBA interview process.What does a person ...
Continue readingCase Study III
Company Name – SapientRound – 2 (Case Study)Topic – Recommendation of food items to new customer in a restaurant
Continue readingCase Study II
Company Name – Myntra Round – 2 (Case Study)Topic:- Suppose you have a restaurant and there is a crunch of sitting space, apart from that you have one kitchen door which is generally crowded with the waiters and food ...
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