Scala Test

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Scala bytecode can run on top of Java VM. What is the fundamental difference between Java object.clone() and Scala object.copy()?

• clone() will copy class structures but not the data, while copy() will also copy data into new objects.
• One is a Java object, the other is a Scala object.
• There is no difference.
• copy() allows you to change values during the copying process; clone() does not.

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What value does this code return? 

val m1 = Map("a"->1,"b"->2,"c"->3)

m1.contains("a")

• 1
• 2
• a
• true

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What is one way to avoid low-level parallelization details?

• monads
• literal functions
• partially applied functions
• parallel collections

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What do you use in ScalaTest to see a detailed diagram of error messages when a test fails?

• JUnit
• DiagrammedAssertions
• ArgumentExceptions
• AssertionException

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What data type would you use to store an immutable collection of objects that contain a fixed number of varying types?

• List
• Tuple
• Array
• ImmutableCollection

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