NPTEL Data Science for Engineers Assignment 1 Answer 2023

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NPTEL Data Science for Engineers Assignment 1 Answer 2023 – Here All The Questions and Answers Provided to Help All The Students and NPTEL Candidate as a Reference Purpose, It is Mandetory to Submit Your Weekly Assignment By Your Own Understand Level.

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1 point

Which of the following variable names are INVALID in R?

 1_variable

 variable_1

 _variable

 variable@

Answer: A,C,D

1 point

The function ls() in R will

 set a new working directory path

 list all objects in our working environment

 display the path to our working directory

 None of the above

Answer: B

Consider a following code snippet. Based on this, answer questions 3 and 4.

1 point

Which of the following command is used to access the value “Shyam”?

 print(patient list[3][2])

 print(patient list[[3]][1])

 print(patient list[[3]][2])

 print(patient list[[2]][2])

Answer: C

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1 point

The output of the code given below is

 

 

 

 Code will throw an error.

Answer: B

1 point

What is the output of following code?

 double

 integer

 list

 None of the above

Answer: A

1 point

State whether the given statement is True or False.
The library reshape2 is based around two key functions named melt and cast

 True

 False

Answer: A

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1 point

What is the output of following code?

 6

 4

 2

 8

Answer: B

Create the data frame using the code given below and answer questions 8 and 9.

student data = data.frame(student id=c(1:4), student name=c(‘Ram’,‘Harish’,‘Pradeep’,‘Rajesh’))

1 point

Choose the correct command to add a column named student_dept to the dataframe student_data.

 student datastudent dept=c(“Commerce”, “Biology”, “English”, “Tamil”)

 student data[“student dept”]= c(“Commerce”,“Biology”, “English”,“Tamil”)

 student dept= student data[c(“Commerce”,“Biology”,“English”,“Tamil”)]

 None of the above

Answer: A

1 point

Choose the correct command to access the element Tamil in the dataframe student_data

 student data[[4]]

 student data[[4]][3]

 student data[[3]][4]

 None of the above

Answer: C

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1 point

The command to check if a value is of numeric data type is _____.

 typeof()

 is.numeric()

 as.numeric()

 None of the above

Answer: B

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