NPTEL Data Science for Engineers Assignment 1 Answers 2022:- All the Answers provided below to help the students as a reference, You must submit your assignment at your own knowledge.
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NPTEL Data Science for Engineers Assignment 1 Answers 2022 [July 2022]
1. Choose the variable name(s) that are valid in R.
a. emp_name = “Ram”
b. emp.name = “Ram”
c. empname1 “Ram”
d. 1empname = “Ram”
Answer:- a, b, c
2. The function ls() in R will
a. set a new working directory path
b. list all objects in our working environment
c. display the path to our working directory
d. None of the above
Answer:- b
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3. Consider the following code in R.
If we supply 4 as an argument to the function find.function, after executing the above code, the result displayed would be - the numbers “1,2,3,4”
- the numbers “1,4,9,16”
- the number “4”
- None of the above
Answer:-b
4. The next statement in R programming is useful
a. for skipping the current iteration of a loop without terminating it
b. for terminating the current iteration of a loop
c. for evaluating the current iteration of a loop without terminating it
d. None of the above
Answer:- a
Create the data frame using the code given below and answer questions 5 and 6
student_data = data.frame(student_id=c(1:4), student_name=c(’Ram’,’Harish’,’Pradeep’,’Rajesh’))
5. Choose the correct command to add a column named student_dept to the dataframe student_data
a. student_data$student_dept=c(“Commerce”,”Biology”,”English”,”Tamil”)
b. student_data[“student_dept”]= c(“Commerce”,”Biology”,”English”,”Tamil”)
c. student_dept= student_data[c(“Commerce”,”Biology”,”English”,”Tamil”)]
d. None of the above
Answer:- b
6. Choose the correct command to access the element Tamil in the dataframe student_data
a. student_data[[4]]
b. student_data[[4]][3]
c. student_data[[3]][4]
d. None of the above
Answer:- c
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7. State whether the given statement is True or False.
The library reshape2 is based around two key functions named melt and cast.
a. True
b. False
Answer:- a
8. Consider the following code.
If a room temperature of 20℃ is input to the above code, choose the output displayed - “The room is cold. Please turn the heater on!”
- “The room is warm” “Enjoy the stay!”
- “The room is hot” “Please turn the air conditioning on!”
- None of the above
Answer:- b
9. Table 1 provides the scores of the students in three subjects. Create a data frame called students_scores out of Table 1. Which of the following options gives Table 2 as an output?
Answer:- a
10. The command to check if a value is of numeric data type is ___
Answer:- b
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What is Data Science for Engineers?
Data Science for Engineers is a fun-filled course where Domain Certification helps learners to gain expertise in a specific Area/Domain. This can be helpful for learners who wish to work in a particular area as part of their job or research or for those appearing for some competitive exam or becoming job-ready or specialising in an area of study. Every domain will comprise Core courses and Elective courses. Once a learner completes the requisite courses per the mentioned criteria, you will receive a Domain Certificate showcasing your scores and the domain of expertise.
CRITERIA TO GET A CERTIFICATE
Average assignment score = 25% of the average of best 6 assignments out of the total 8 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100
Final score = Average assignment score + Exam score
YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF THE AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.
| COURSE NAME | ANSWER |
| NPTEL Data Science for Engineers Assignment 1 Answers | Click Here |
| NPTEL Data Science for Engineers Assignment 2 Answers | Click Here |
| NPTEL Data Science for Engineers Assignment 3 Answers | Click Here |
| NPTEL Data Science for Engineers Assignment 4 Answers | NA |
| NPTEL Data Science for Engineers Assignment 5 Answers | NA |
| NPTEL Data Science for Engineers Assignment 6 Answers | NA |
| NPTEL Data Science for Engineers Assignment 7 Answers | NA |
| NPTEL Data Science for Engineers Assignment 8 Answers | NA |
NPTEL Data Science for Engineers Assignment 1 Answers 2022 [Jan 2022]
Q1. The function “ls ()” in R will
(A) set a new working directory path
(B) list all objects in our working environment
(C) display the path to our working directory
(D) list all files in our working directory
Ans:- (D) list all files in our working directory
Q2. Consider the following code:
If a room temperature of 20 degree Celsius is input to the above code, choose the output displayed:
(A) “The room is chilly. Please turn the heater on!”
(B) “The room is warm” “Enjoy the stay!”
(C) “The room is hot” “Please turn the air conditioning on!”
(D) None of the above
Ans:- (B) “The room is warm” “Enjoy the stay!”
Q3. Consider the code below to create a dataframe city_data:
Choose the correct answer based on the output expected on running the below code.
(A) In the column weather in dataframe city_data, “Rain” is replaced by “Snowy”
(B) In the column name in dataframe city_data, “City C” is replaced by “Snowy”
(C) No change occurs to the entries in the dataframe city_data
(D) The code raises an error
Ans:- (A) In the column weather in dataframe city_data, “Rain” is replaced by “Snowy”
Q4. Consider the code given below.
Choose the correct command to access the variable “Cloudy”
(A) city_weather[[4]][2]
(B) city_weather[[5]]
(C) city_weather[[2]][2]
(D) None of the above
Ans:- (A) city_weather[[4]][2]
Q5. Consider the following code.
A = matrix(c(1:42), nrow = 6, ncol = 7, byrow = T)
B = A[-2,]
Based on the output of the above code, choose the correct options from the following
(A) B is a matrix consisting of only elements of the second row of matrix A
(B) B is a matrix consisting of same elements as that of A
(C) The code raises an error
(D) B is a matrix consisting of all elements of A excluding the second row
Ans:- (D) B is a matrix consisting of all elements of A excluding the second row
Q6. The parameter “collapse” in the function paste()
(A) adjusts the display of the string to left, right or center
(B) add space in between two strings
(C) eliminates the space in between two strings
(D) eliminates the space within two words in a string
Ans:- (B) add space in between two strings
Q7. Consider the following code in R.
If we supply 4 as an argument to the function find.function, after executing the above code, the result displayed would be
(A) the numbers “1,2,3,4”
(B) the numbers “1,4,9,16”
(C) the number “4”
(D) None of the above
Ans:- (B) the numbers “1,4,9,16”
Q8. The operator %in% is used for
(A) multiplication of a matrix with its transpose
(B) generating a sequence of numbers in a vector
(C) identifying if an element belongs to a vector
(D) none of the above
Ans:- (C) identifying if an element belongs to a vector
Q9. The output of compiling and executing the following code in R would be
(A) The term “Green” “apple” printed 5 times.
(B) The term “Green apple” printed 3 times.
(C) The term “Green” printed 4 times.
(D) The term “Green” “apple” printed 4 times.
Ans:- (D) The term “Green” “apple” printed 4 times.
Q10. The “next” statement in R programming is useful
(A) for skipping the current iteration of a loop without terminating it.
(B) for terminating the current iteration of a loop.
(C) for evaluating the current iteration of a loop without terminating it.
(D) none of the above
Ans:- (A) for skipping the current iteration of a loop without terminating it.
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NPTEL Data Science for Engineers Assignment 1 Answers 2022:- All the Answers provided below to help the students as a reference, You must submit your assignment at your own knowledge
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