Scala For Big Data Set 2

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Free Online Best Scala For Big Data MCQ Questions for improve your basic knowledge of Scala For Big Data. This Scala For Big Data set 2 test that contains 25 Multiple Choice Questions with 4 options. You have to select the right answer to a question.

Start

Congratulations - you have completed Scala For Big Data Set 2.

You scored %%SCORE%% out of %%TOTAL%%.

Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

The following technique/construct lets us transform a function with multiple arguments into a chain of functions____

A	Extractors
B	Traits
C	Trait mixins
D	Currying

Question 2

Decide what the following code prints___ val odds=List(3,5,7) var result=1 odds.foreach((num:Int)=>result*=num) println(result)

A	1
B	105
C	List(105)
D	List(3,5,7)

Question 3

How do you abruptly stop execution in the REPL?

A	Pressing Ctrl+C
B	Pressing Ctrl+Q
C	Pressing Ctrl+W
D	All of the above

Question 4

Select the correct output___ val cool=Map(“a”->”aaa”, “b”->”bbb”, “a”->”ccc”) println(cool(“a”))

A	"a"
B	"aaa"
C	"bbb"
D	"ccc"

Question 5

Choose the correct output__ object Dog{ def bark=”woof” }

A	It prints “woof”
B	It prints nothing
C	It raises an exception
D	None of the above

Question 6

Select the correct value specified by the following line of code____ “abcde” ensuring (_.length>3)

A	abc
B	abcd
C	abcde
D	The code throws an error

Question 7

Which of the following statements is untrue about a functor in Scala?

A	It is a mapping between categories
B	It is a built-in construct in Scala
C	It maps objects or entities of one category to those of another
D	All of the above

Question 8

Which is the correct value of the following expression? List(1,2,3)flatMap(x=>List(x,4))

A	List(1,2,3,4)
B	List(1,4,2,4,3,4)
C	List(4,4,4)
D	List (1,2,3,x,4)

Question 9

Select the correct output for the following code_____ var band={ var name=”sublime” name } println(name)

A	It prints “sublime”
B	It prints nothing
C	The code raises an error
D	syntax error

Question 10

Which of the following is true about Scala and Java?

A	Both work with popular IDEs like Eclipse, Netbeans, and IntelliJ
B	Both run on the JVM
C	We can call Scala from Java and Java from Scala
D	All of the above

Question 11

Select the true statements from the following____

A	All of the above
B	A Future is an object
C	A Future holds a value that may become available at a later point in time
D	We can complete a promise only once

Question 12

Scala is a portmanteau for____

A	Scalar and Language
B	Script and Language
C	Sequential and Language
D	Scalable and Language

Question 13

Select the correct output for the following code__ val leaders=collection.mutable.Buffer(“Reykon”) leaders+=”obama” println(leaders)

A	ArrayBuffer(Reykon, Obama)
B	ArrayBuffer(Reykon)
C	List(Reykon, obama)
D	The code throws an error

Question 14

Looking at the previous code, can you predict the output of the following code? val stuff=collection.mutable.Buffer(“blue”) stuff+=44 println(stuff)

A	ArrayBuffer(blue, 44)
B	ArrayBuffer(blue)
C	Something else
D	The code throws an error

Question 15

Choose the correct output for the following code____ val x:Option[String]=Some(“hi”) println(x.get)

A	This prints Some(“hi”)
B	This prints nothing
C	The code throws an error
D	This prints “hi”

Question 16

Select appropriate output___ def quadruple(x:Int):Int=x*4 val quadrupleCopy=quadruple _ println(quadrupleCopy(-1))

A	-4
B	4
C	20
D	The code throws an error

Question 17

Select the correct output for the following code____ object Flash{ def superpower=”speed” }

A	This prints “speed”
B	This prints nothing
C	This throws an error
D	None of the above

Question 18

Select the Scala construct that holds pairwise different elements of the same type_____

A	Sets
B	Groups
C	Forums
D	Maps

Question 19

For which kind of data should you use a case class?

A	Mutable data
B	Immutable data
C	both a and b
D	None of the above

Question 20

Its Java compatibility makes Scala suitable for____

A	Android Development
B	Apple Development
C	Microsoft Development
D	Google Development

Question 21

What does this code print? var y:Option[String]=None y.get

A	This prints None
B	This prints nothing
C	This throws an exception
D	None of the above

Question 22

Which of the following statements are true about Either?

A	It is a sealed abstract class
B	We can use it to deal with possible missing values
C	An instance of Either can be an instance of Left or Right
D	All of the above

Question 23

Is the following function pure? def change:Unit={ x=x+10 }

A	It is pure
B	It is not pure
C	can not say
D	some time

Question 24

Scala is also a_____

A	Style Sheets Language
B	Scripting Language
C	Cloud Computing Language
D	All of the above

Question 25

Select the correct output: val numbers=List(11,22,33) var total=0 for(i<-numbers){ total+=I } println(total)

A	33
B	22
C	11
D	66

Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results

There are 25 questions to complete.

←

List

→

Return

Shaded items are complete.

1	2	3	4	5
6	7	8	9	10
11	12	13	14	15
16	17	18	19	20
21	22	23	24	25
End

Return

BACK SET 1

NEXT SET 3

Study Zone

MCQ » Scala For Big Data Set 2

Scala For Big Data Set 2

Important Links