74 + Interview Questions in Data Science Basics And Data Scientist Toolbox in Data Science Page 2 InterviewSolution

51.	Which of the following statement would create branch named as ‘sanfoundry’?(a) git checkout -b sanfoundry(b) git checkout -c sanfoundry(c) git check -b sanfoundry(d) none of the mentionedThe question was posed to me in exam.The query is from CLI and Git Workflow topic in chapter Data Science Basics and Data Scientist Toolbox of Data Science
Answer» The correct answer is (a) GIT checkout -b sanfoundry Easy EXPLANATION - A BRANCH in Git is simply a lightweight MOVABLE pointer to one of these COMMITS.

Discussion

52.	Which of the following is a revision control system?(a) Git(b) NumPy(c) Slidify(d) None of the mentionedI have been asked this question at a job interview.This is a very interesting question from CLI and Git Workflow topic in section Data Science Basics and Data Scientist Toolbox of Data Science
Answer» Correct option is (a) Git The explanation is: Git is a free and open SOURCE distributed version CONTROL SYSTEM designed to handle everything from small to very large projects with SPEED and efficiency.

Discussion

53.	Point out the correct statement.(a) CLI can help you to organize messages(b) CLI can help you to organize files and folders(c) Navigation of directory is possible using CLI(d) None of the mentionedI had been asked this question in unit test.I want to ask this question from CLI and Git Workflow topic in division Data Science Basics and Data Scientist Toolbox of Data Science
Answer» The correct option is (b) CLI can HELP you to ORGANIZE files and folders To EXPLAIN: CLI stands for COMMAND LINE Interface.

Discussion

54.	Which of the following CLI command can also be used to rename files?(a) rm(b) mv(c) rm -r(d) none of the mentionedThe question was posed to me in semester exam.I need to ask this question from CLI and Git Workflow in portion Data Science Basics and Data Scientist Toolbox of Data Science
Answer» CORRECT CHOICE is (B) MV Explanation: mv STANDS for move.

Discussion

55.	Which of the following is a key characteristic of a hacker?(a) Afraid to say they don’t know the answer(b) Willing to find answers on their own(c) Not Willing to find answers on their own(d) All of the mentionedI have been asked this question by my college director while I was bunking the class.My question is based upon Basics of Data Science topic in portion Data Science Basics and Data Scientist Toolbox of Data Science
Answer» The CORRECT ANSWER is (B) Willing to find answers on their own Best EXPLANATION: Hacker is an EXPERT at programming and solving problems with a computer.

Discussion

56.	Which of the following is commonly referred to as ‘data fishing’?(a) Data bagging(b) Data booting(c) Data merging(d) None of the mentionedThe question was posed to me in final exam.My question is from Analysis and Experimental Design in division Data Science Basics and Data Scientist Toolbox of Data Science
Answer» CORRECT option is (d) NONE of the mentioned Best explanation: Data DREDGING is sometimes referred to as “data FISHING”.

Discussion

57.	Which of the following analysis is usually modeled by deterministic set of equations?(a) Predictive(b) Causal(c) Mechanistic(d) All of the mentionedThe question was posed to me during an online exam.Enquiry is from Types of Questions topic in chapter Data Science Basics and Data Scientist Toolbox of Data Science
Answer» The correct option is (C) Mechanistic To explain: EQUATIONS are BASED on physical/engineering SCIENCE.

Discussion

58.	Which of the following is the correct way of creating GitHub repository in to well labelled commits?(a) Fork another user’s repository(b) Pop another user’s repository(c) Zip another user’s repository(d) None of the mentionedI got this question in final exam.This intriguing question originated from CLI and Git Workflow in portion Data Science Basics and Data Scientist Toolbox of Data Science
Answer» Right answer is (a) Fork another user’s REPOSITORY The best I can EXPLAIN: A fork is a COPY of a repository.

Discussion

59.	Point out the correct statement.(a) Least square is an estimation tool(b) Least square problems falls in to three categories(c) Compound least square is one of the category of least square(d) None of the mentionedI got this question in final exam.This key question is from ToolBox Overview in section Data Science Basics and Data Scientist Toolbox of Data Science
Answer» Right answer is (a) Least SQUARE is an estimation tool Easy explanation - The Method of Least SQUARES is a PROCEDURE to determine the best FIT LINE to data.

Discussion

60.	Which of the following focuses on the discovery of (previously) unknown properties on the data?(a) Data mining(b) Big Data(c) Data wrangling(d) Machine LearningThe question was asked in an interview.My question is based upon Big Data topic in chapter Data Science Basics and Data Scientist Toolbox of Data Science
Answer» Correct ANSWER is (a) Data mining Best explanation: Data MUNGING or data wrangling is loosely the process of manually converting or mapping data from one “raw” form into another format that ALLOWS for more convenient CONSUMPTION of the data with the help of semi-automated tools.

Discussion

61.	Which of the following term is appropriate to the below figure?(a) Large Data(b) Big Data(c) Dark Data(d) None of the mentionedI have been asked this question in examination.My question is based upon Big Data in section Data Science Basics and Data Scientist Toolbox of Data Science
Answer» Right choice is (b) Big Data Easy EXPLANATION - Big data is a broad term for data SETS so large or complex that traditional data PROCESSING APPLICATIONS are INADEQUATE.

Discussion

62.	Which of the following relationship are usually identified as average effects?(a) Descriptive(b) Causal(c) Predictive(d) None of the mentionedThis question was addressed to me during a job interview.The question is from Types of Questions in division Data Science Basics and Data Scientist Toolbox of Data Science
Answer» Correct option is (B) Causal The best I can explain: A CORRELATION is a MEASURE or DEGREE of relationship between TWO variables.

Discussion

63.	Point out the correct statement.(a) Descriptive analysis can be more useful for defining future studies(b) Correlation does imply causation(c) Inference is commonly the goal of statistical model(d) None of the mentionedThe question was asked by my college professor while I was bunking the class.The question is from Types of Questions topic in section Data Science Basics and Data Scientist Toolbox of Data Science
Answer» Correct CHOICE is (B) Correlation does IMPLY causation The best explanation: INFERENCE depends heavily on the SAMPLING scheme.

Discussion

64.	Point out the wrong statement.(a) Exploratory analyses are usually the final way(b) Exploratory models are useful for discovering new connection(c) Exploratory analysis alone should not be used for predicting(d) All of the mentionedI have been asked this question in class test.This is a very interesting question from Types of Questions in section Data Science Basics and Data Scientist Toolbox of Data Science
Answer» RIGHT answer is (a) EXPLORATORY analyses are USUALLY the FINAL way The best I can explain: Exploratory analyses are usually not the final way.

Discussion

65.	Point out the correct statement.(a) Descriptive analysis is first kind of data analysis performed(b) Descriptions can be generalized without statistical modelling(c) Description and Interpretation are same in descriptive analysis(d) None of the mentionedThe question was posed to me during an interview.Question is taken from Types of Questions topic in section Data Science Basics and Data Scientist Toolbox of Data Science
Answer» Correct option is (b) DESCRIPTIONS can be generalized WITHOUT STATISTICAL modelling For EXPLANATION: Descriptive analysis DESCRIBE a set of data.

Discussion

66.	Which of the following command line environment is used for interacting with Git?(a) GitHub(b) Git Bash(c) Git Boot(d) All of the mentionedThe question was posed to me in a national level competition.I'm obligated to ask this question of CLI and Git Workflow in division Data Science Basics and Data Scientist Toolbox of Data Science
Answer» Correct CHOICE is (b) Git Bash Easiest EXPLANATION - Git for Windows PROVIDES a BASH EMULATION used to run Git from the command line.

Discussion

67.	Which of the following data mining technique is used to uncover patterns in data?(a) Data bagging(b) Data booting(c) Data merging(d) Data DredgingThis question was addressed to me in quiz.My question is from Analysis and Experimental Design in section Data Science Basics and Data Scientist Toolbox of Data Science
Answer» The CORRECT choice is (d) Data Dredging Easy explanation - Data dredging, also CALLED as data snooping, refers to the practice of MISUSING data mining TECHNIQUES to show misleading scientific ‘research’.

Discussion

68.	Which of the following uses data on some object to predict values for other object?(a) Inferential(b) Exploratory(c) Predictive(d) None of the mentionedI have been asked this question in an interview for job.The above asked question is from Types of Questions in portion Data Science Basics and Data Scientist Toolbox of Data Science
Answer» The correct choice is (c) Predictive The BEST I can EXPLAIN: A PREDICTION is a FORECAST, but not only about the weather.

Discussion

69.	Which of the following analytical capabilities are provided by information management company?(a) Stream Computing(b) Content Management(c) Information Integration(d) All of the mentionedI got this question in an interview for job.Origin of the question is Big Data topic in chapter Data Science Basics and Data Scientist Toolbox of Data Science
Answer» The correct ANSWER is (d) All of the mentioned The explanation is: With stream computing, store less, ANALYZE more and make better decisions FASTER.

Discussion

70.	Which of the following is more applicable to the below figure?(a) Descriptive(b) Causal(c) Predictive(d) None of the mentionedThe question was asked in an interview.I need to ask this question from Types of Questions in division Data Science Basics and Data Scientist Toolbox of Data Science
Answer» RIGHT CHOICE is (a) Descriptive To explain I would say: Google trends HELPS to describe the set of DATA.

Discussion

71.	Causal analysis is commonly applied to census data.(a) True(b) FalseThe question was posed to me in unit test.The origin of the question is Types of Questions in division Data Science Basics and Data Scientist Toolbox of Data Science
Answer» Right choice is (b) False The best I can explain: DESCRIPTIVE ANALYSIS is commonly applied to CENSUS DATA.

Discussion

72.	Which of the following command allows you to update the repository?(a) push(b) pop(c) update(d) none of the mentionedI had been asked this question in a national level competition.This question is from CLI and Git Workflow topic in section Data Science Basics and Data Scientist Toolbox of Data Science
Answer» The CORRECT ANSWER is (a) push To explain: The git BRANCH COMMAND is your general-purpose branch administration tool.

Discussion

73.	Which of the following is characteristic of Raw Data?(a) Data is ready for analysis(b) Original version of data(c) Easy to use for data analysis(d) None of the mentionedI have been asked this question at a job interview.My doubt stems from ToolBox Overview topic in portion Data Science Basics and Data Scientist Toolbox of Data Science
Answer» Correct answer is (b) Original version of DATA Easiest explanation - Raw data is data that has not been processed for USE.

Discussion

74.	Raw data should be processed only one time.(a) True(b) FalseThe question was asked in an interview for internship.I'd like to ask this question from Basics of Data Science topic in portion Data Science Basics and Data Scientist Toolbox of Data Science
Answer» CORRECT choice is (B) False Easiest explanation - RAW DATA MAY only need to be processed once.

Discussion

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Which of the following is a revision control system?(a) Git(b) NumPy(c) Slidify(d) None of the mentionedI have been asked this question at a job interview.This is a very interesting question from CLI and Git Workflow topic in section Data Science Basics and Data Scientist Toolbox of Data Science

Which of the following CLI command can also be used to rename files?(a) rm(b) mv(c) rm -r(d) none of the mentionedThe question was posed to me in semester exam.I need to ask this question from CLI and Git Workflow in portion Data Science Basics and Data Scientist Toolbox of Data Science

Which of the following term is appropriate to the below figure?(a) Large Data(b) Big Data(c) Dark Data(d) None of the mentionedI have been asked this question in examination.My question is based upon Big Data in section Data Science Basics and Data Scientist Toolbox of Data Science

Which of the following is more applicable to the below figure?(a) Descriptive(b) Causal(c) Predictive(d) None of the mentionedThe question was asked in an interview.I need to ask this question from Types of Questions in division Data Science Basics and Data Scientist Toolbox of Data Science

Causal analysis is commonly applied to census data.(a) True(b) FalseThe question was posed to me in unit test.The origin of the question is Types of Questions in division Data Science Basics and Data Scientist Toolbox of Data Science

Raw data should be processed only one time.(a) True(b) FalseThe question was asked in an interview for internship.I'd like to ask this question from Basics of Data Science topic in portion Data Science Basics and Data Scientist Toolbox of Data Science