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  1. Before running the below code, simpleList should be initialized as a ___ list.
    println(simpleList)
    simpleList.add(-5)
    simpleList.remove(4)
    println(simpleList)
    
  2. Which of the following statements are valid?

    选择合适的多项回答。

  3. Why does a RecyclerView need an Adapter?
  4. Which of the following are advantages to using RecyclerView?

    选择合适的多项回答。

  5. Which of the following is true about packages?

    选择合适的多项回答。

  6. What should you do to ensure that the correct type of resource ID is passed in to a constructor?
  7. 填空

    输入一个或多个字词以完成句子。

    In the below code, ___ should be written in the for loop, so that the output returned is the list of numbers 1 through 3, with each number printed on a new line.

    val numbers = listOf(1, 2, 3)
    for (_______) {
      println(num)
    }