1Z0-808: Java SE 8 Programmer IDemo

By Oracle · Question Mode

QuestionQ199

Using Operators and Decision Constructs

Given this code fragment:

Question Image

Which three code fragments can each be independently inserted at line n1 so that the code prints One?

Choose three
  • A byte x = 1;
  • B short x = 1;
  • C String x = "1";
  • D long x = 1;
  • E double x = 1;
  • F Integer x = new Integer("1");
Explanation

byte and short are valid integral selector types, and the constant case 1 is assignment-compatible with both. Integer is also a valid selector type and its value is unboxed to int, matching case 1. Each of these variables has the value 1, so execution prints One. A String selector requires compatible String case labels, and long and double are not supported selector types under the applicable Java switch rules.

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