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WalMart Data Science Interview Questions
Questions Answers Views Company eMail

Write the code to reverse a Linked list.

441

What assumptions does linear regression machine learning algorithm make?

362

What data structures are available in the Pandas package in Python programming language?

366

A stranger uses a search engine to find something and you do not know anything about the person. How will you design an algorithm to determine what the stranger is looking for just after he/she types few characters in the search box?

422

What do you understand by parametric and non-parametric methods? Explain with examples.

328

State some use cases where Hadoop MapReduce works well and where it does not.

346

How will you fix multi-colinearity in a regression model?

337

Have you used sampling? What are the various types of sampling have you worked with?

322

What is the difference between an iterator, generator and list comprehension in Python?

364

What is the difference between a bagged model and a boosted model?

334

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Un-Answered Questions

What do you mean by focus of control?

1067


Explain outbound email integration.

263


Which php framework is best?

992


How do I create a directory in dos?

539


What is the definition of 'good' cooling tower water?

1068


What is & in a url?

964


How do I change the scenario summary in excel?

669


if no size is defined while creating the database, what size will the database have? : Sql server administration

1010


WHEN +VE VOLTAGE ON THE GATE P-CHANNEL JFET IS INCRESED DRAN CRICUT WILL BE WHAT CONDITION

1984


When is used decision table testing?

1051


Name two paging states for a page in memory?

1066


What is testng and why is it better than junit?

1056


.We want to compare the performance of a single threaded disk server with a multithreaded 1. Suppose the server takes 25 ms to receive a request for work from client, dispatch the request for processing and actual data request processing when reqd. Data is in main memory. If the reqd. Data is not in the main memory a real disk operation is needed and an additional 75 ms are reqd. On the average. On the average 25% of the clients requests access the disk. During the disk I/O period the thread waits. Assume that there is no other process in system when the server is running. How many requests can the server handle per second if its a)single threaded b)multithreaded

1952


What is composer? How to create a cakephp project using composer?

3


i want to add 2 records to a table but the last field in the table is 1000 char long.Is it possible?if yes how?

2238