Update scala-quiz.md (#276)

scala/scala-quiz.md

@@ -11,7 +11,7 @@ Scala Assessment
 
 #### Q2. What value does this code return? 
 
-```
+```scala
 val m1 = Map("a"->1,"b"->2,"c"->3)
 m1("a")
 ```
@@ -48,7 +48,7 @@ m1("a")
 
 #### Q6. After defining a function in the interpreter, Scala returns the following. What does the 
 
-```
+```scala
 myfnc: ()Unit
 ```
 
@@ -76,7 +76,7 @@ myfnc: ()Unit
 
 #### Q9. What type of object does this code create? 
 
-```
+```scala
 val x = (1234, "Active")
 ```
 
@@ -112,7 +112,7 @@ val x = (1234, "Active")
 
 #### Q13. What is the value of z after executing this code? 
 
-```
+```scala
 val y = List('a','b')
 val z = y::List('c') 
 ```
@@ -136,3 +136,53 @@ val z = y::List('c')
 ##### answers missing
 
 
+#### Q16. What is the data type of y after this code is executed?  
+
+```scala
+val y = (math floor 3.1415 * 2)
+```
+- [ ] short
+- [ ] double
+- [ ] int
+- [ ] bigInt
+
+
+#### Q17. When using pattern matching, which character matches on any object?
+- [ ] %
+- [ ] _
+- [ ] ^
+- [ ] *
+
+
+#### Q18. You have created an array using val. Can you change the value of any element of the array—and why or why not?
+
+- [ ] Yes, the reference to the array is immutable, so the location that the array points to is immutable. The values in the array are mutable.
+- [ ] The 0th element is immutable and cannot be modified. All other elements can be modified.
+- [ ] Yes, val does not make arrays immutable.
+- [ ] No, val makes the array and values of the array immutable.
+
+
+#### Q19. What is the output of this function? 
+
+```scala
+def main () {
+     var a = 0
+     for (a<-1 until 5){println(a)}
+```
+- [ ] 1,2,3,4,5
+- [ ] 0,1,2,3,4
+- [ ] 1,2,3,4
+- [ ] 2,3,4,5
+
+
+#### Q20. What do you call objects with immutable state?
+
+- [ ] singletons
+- [ ] stationary objects
+- [ ] functional objects
+- [ ] fixed objects
+
+
+
+
+