Question 1

Get the output | R Interview Question | Zomato

Question

TDM = [‘The’,’Data’,’Monk] a. Print the last object of the list b. Change the last element to Monkey c. Remove Monkey from the list d. GET Monk back to the list They did not use The Data Monk as example :P

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R 55 years 1 Answer 948 views Grand Master

Question 2

Is Array a matrix or matrix an array ? OLA interview Question

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Solve the riddle :P

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R 55 years 0 Answers 975 views Grand Master

Question 3

varchar vs char in SQL

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What is the difference between CHAR and VARCHAR2 datatype in SQL?

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SQL 55 years 1 Answer 1121 views Contributor

Question 4

What is the difference between clustered and non clustered index in SQL?

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3 points

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SQL 55 years 1 Answer 972 views Contributor

Question 5

What cross-validation technique would you use on a time series dataset?

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How would you do it?

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Machine Learning 55 years 0 Answers 1108 views Great Grand Master

Question 6

Define Skewness.

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Also explain what is meant by negative value of skewness.

in progress 0

Statistics 55 years 3 Answers 1129 views Great Grand Master

Question 7

What do you understand by element recycling in R?

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Give an example using datasets

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R 55 years 1 Answer 885 views Great Grand Master

Question 8

When to use Mean and Median while doing missing value treatment?

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Please answer with example

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Machine Learning 55 years 1 Answer 994 views Newbie

Question 9

What’s the difference between Type I and Type II error?

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How can you explain it to a person with no technical background

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Machine Learning 55 years 0 Answers 795 views Great Grand Master

Question 10

How to interpret ACF graph for ARIMA model ?

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Auto correlation factor

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Machine Learning 55 years 0 Answers 835 views Newbie

Question 11

What is the role of “Database Testing” in SQL?

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Is it necessary?

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SQL 55 years 0 Answers 1039 views Great Grand Master

Question 12

What is recursion?

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Give an example.

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Python 55 years 2 Answers 855 views Great Grand Master

Question 13

How to combine multiple vectors in one data frame in R ?

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Please provide proper example

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R 55 years 1 Answer 999 views Newbie

Question 14

How will you explain R programming to person from a non-technical background?

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The person is a beginner in this field.

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R 55 years 0 Answers 1036 views Great Grand Master

Question 15

What is the difference between subset() and sample() function in R?

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Explain with simple example

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R 55 years 2 Answers 2465 views Member

Question 16

Give the output of the following function | Amazon Interview Question

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b <- 4 f <- function(a) { b <- 3 b^3 + g(a) } g <- function(a) { a*b }

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R 55 years 1 Answer 1038 views Member

Question 17

What is the difference between supervised and unsupervised machine learning?

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An example along with explanation would be great.

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Machine Learning 55 years 0 Answers 843 views Great Grand Master

Question 18

What is the difference between Matrix and an array ?

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Matrix and array difference in R

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R 55 years 1 Answer 1311 views Member

Question 19

What is the difference between a matrix and a dataframe in R?

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Please explain in layman terms

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R 55 years 3 Answers 1441 views Member

Question 20

Explain general syntax to create Matrices in R?

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Please explain the parameters as well

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R 55 years 2 Answers 1108 views Newbie

Question 21

Guesstimate | What is the number of laptops sold in Bangalore on an average routine day? | Lowe’s Interview Question

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Give the approach

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Guesstimate 55 years 2 Answers 2276 views Newbie

Question 22

Guesstimate | How many t-shirts e-commerce companies selling in India per day? | Myntra Interview Question

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Guesstimate interview question

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Guesstimate 55 years 0 Answers 1679 views Newbie

Question 23

Guesstimate | Number of Maggi sold in a day in India | Myntra Interview Question

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Guess the number of maggie sold in India

in progress 0

Guesstimate 55 years 2 Answers 8744 views Newbie

Question 24

The wildcard in a WHERE clause is useful when?

Poll

Vote for the correct answer

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SQL 55 years 0 Answers 1762 views Newbie

Question 25

What is the function of COALESCE()?

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When do we use Coalesce() function?

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SQL 55 years 3 Answers 1506 views Newbie

Question 26

SQL Query | Level – Basic 2

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Get all employee detail from EmployeeDetail table whose "FirstName" not start with any single character between 'a-p'

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SQL 55 years 2 Answers 1249 views Member

Question 27

SQL Query | Level – Basic 4

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How can you create an empty table from an existing table? Suppose the name of existing table is student and new table is studentcopy

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SQL 55 years 2 Answers 1263 views Member

Question 28

SQL Query | Level – Basic 3

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Get all the employee detail from EmployeeDetail table whose "FirstName" starts with A and contain 5 letters

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SQL 55 years 3 Answers 1163 views Member

Question 29

SQL Query | Level – Basic

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Write an SQL Query find number of employees according to gender whose DOB is between 01/01/1960 to 31/12/1975. Use column name as sex,DOB table name Employees

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SQL 55 years 3 Answers 1040 views Member

Question 30

Find the Output

Poll

What would be the output of SELECT SUM(1+2*3)

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SQL 55 years 0 Answers 1344 views Member

Question 31

Find the Nth largest salary from employee table.

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Best way to get the Nth highest salary from a table. Table name - Employee Columns - Emp_id, salary,depar

in progress 1

SQL 55 years 3 Answers 1443 views Member

Question 32

What do you mean by p-value?

Question

Can someone please explain with example, what exactly is a p-value?

in progress 0

Statistics 55 years 1 Answer 985 views Newbie

Question 33

What is a good p-value?

Poll

In one of my interviews, I was asked if p-value for a variable should be close to 0 or close to 1 ?

in progress 0

Statistics 55 years 1 Answer 1199 views Grand Master

Question 34

What is the order of execution of SQL query?

Question

A simple query looks something like below Select * FROM Table1 Left join Table 2 on (Condition) where group by order by But what is the flow of execution of commands at the back-end?

in progress 0

SQL 55 years 1 Answer 1166 views Grand Master

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