Test Your Programming Skills with Safcode!

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Here is all important interview / exams questions.
Student doing practice apptitude test on safcode platform.
Instruction: "Total Number of Questions: 20
Each question carry 10 mark , no negative marking"

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Quiz Start

1. The estimate of any population is called ___________ Subset
Sampling
Guess
Statistics

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2. ___________ is called the positional average of any data. mode
quartiles
mean
median

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3. which function converts list to a vector? de_list()
none of them
cnvert_list()
unlist()

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4. __________ is used to plot scatter plot of two variables in accordance with the third variable. Coplot
Heatmap
Violin graph
None of these

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5. How are null entries in a data frame denoted in R? NaN
None of these
na
n/a

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6. R is an__________programming language? None of above
Open Source
Close Source
GPL

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7. The __________ function is used to group data frame. group_by()
List()
matrix()
summerize()

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8. Points more than 1.5 times the inter quartile range above the third quartile is the point of ___________. 50th percentile
25th percentile
100th percentile
75th percentile

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9. How to installed packages in R? Install.packages(packagenames)
Library(packagename)
install(packagename)
require(packagename)

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10. _____________ is not a type of operator in R. Relational
Assignment
Logical
Mathematical

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