Day-3 Assessment(Essentials of Data Analytics Using R)

Point out the correct statement?

• Blocks are evaluated until a new line is entered after the closing brace

• Single statements are evaluated when a new line is typed at the start of the syntactically complete statement

• The if/else statement conditionally evaluates two statements

• Break will execute a loop while a condition is true

Which of the following R syntax is correct for while loop?

• while ( statement1 ) statement2

• while ( statement1 ) else statement2

• while ( statement1 ) do statement2

• while ( statement2 ) doelse statement2

Point out the wrong statement?

• for will execute a loop a fixed number of times

• break will execute a loop while a condition is true

• if and else tests a condition and acting on it

• break is used to break the execution of a loop

Which loop executes a sequence of statements multiple times and abbreviates the code that manages the loop variable?

• repeat

• for

• while

• do-while

Which of the following true about for loop?

• Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body.

• it tests the condition at the end of the loop body.

• Both A and B

• None of the above

Which statement simulates the behavior of R switch?

• Next

• Previous

• break

• goto

Which of the following character skip during execution?

• D

• C

• A

• B

What will be output for the following code?

• A

• ABC

• ABCD

• AA

 What will be output for the following code?

• A

• NAN

• NA

• Error

getwd() is used

• to see current directory

• to set current directory

• to change current directory

• not a R command