A trick Question

[WiLL Tao]

Integer i = new Integer (42);
Long 1 = new Long (42);
Double d = new Double (42.0);
Which two expressions evaluate to True? (Choose Two)
A.(i ==1)
B.(i == d)
C.(d == 1)
D.(i.equals (d))
E.(d.equals (i))
F.(i.equals (42))

i got answer until i compile and refer JDK API Documents.So notice such question.

[Doanh Nguyen]

Originally posted by WiLL Tao:

i got answer until i compile and refer JDK API Documents.So notice such question.

Since it's a trick question, do you mean true, instead of True?

[Valentin Crettaz]

First the name of the reference variable of type Long is l (el) not 1 (one). The latter is not a legal identifier.
Then, A, B and C all yield false since all reference variables are different (created with new).
D and E yield false too since Double.equals() expects an argument of type Double and Integer.equals() expects an argument of type Integer.
F is false too since equals() expects an object and not a primitive.
To summarize, statements A B C F will not compile. D E compile and when run yield false.
So this question is wrong.

[Nazmul Huda Sarkar]

Only D and E are correct statement but return false...rests are wrong statements....So no statement return true.
Believe me, u'll not face such weird question in the real exam. I found so many such weird question in the mock test...but did'nt face in the real exam....
But, really, these are need for self development and confidence