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Exam 1z0-819 topic 1 question 15 discussion

Actual exam question from Oracle's 1z0-819
Question #: 15
Topic #: 1
[All 1z0-819 Questions]

Given the code fragment:
List<Integer> list = List.of(11,12,13,12,13);
Which statement causes a compile time error?

  • A. Double d = list.get(0);
  • B. double f = list.get(0);
  • C. Integer a = Integer.valueOf(list.get(0));
  • D. Integer b = list.get(0);
  • E. int c = list.get(0);
  • F. Double e = Double.valueOf(list.get(0));
Show Suggested Answer Hide Answer
Suggested Answer: A 🗳️
by Leksh_geeth at Nov. 8, 2022, 11:18 a.m.

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ASPushkin
7 months, 1 week ago
Selected Answer: A
A. Double d = list.get(0); causes compile time error an unrelated type both types should be in the same inheritance tree - compiler exception
upvoted 1 times
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d7bb0b2
1 year, 4 months ago
Only A not compile. Cannot convert Integer To Double directly, (Objetc integer to Object DOuble). ..But can asign Integer to double (primitive). For unboxing (Integer -> int) and then promotion of type int to double.
upvoted 4 times
...
Stavok
1 year, 11 months ago
Selected Answer: A
cannot convert from Integer to Double
upvoted 2 times
...
RoxyFoxy
1 year, 11 months ago
Selected Answer: A
Integer cannot be converted to Double
upvoted 1 times
...
RP384
2 years, 3 months ago
Selected Answer: A
cannot cast from Integer to Double, Double.valueOf() is needed
upvoted 3 times
...
supernho
2 years, 3 months ago
Selected Answer: A
A, cannot cast from Integer to Double
upvoted 1 times
...
Ankit1010
2 years, 3 months ago
A is correct Answer
upvoted 1 times
...
Leksh_geeth
2 years, 5 months ago
Answer is Option A
upvoted 1 times
...
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C (25%)
B (20%)
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