Amazon Interview Question

  • amazon-interview-questions
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    of 0 votes
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    A very interesting question. Still awaiting answer so posting again.

    What does this method do?
    
    Stuff is a object in java with two members someStuff and anotherStuff
    
    
    public static Stuff doSomeStuff (Stuff s0, Stuff s1) {
            Stuff someStuff = s1.getSomeStuff();
            if(someStuff != null){
                s1.setSomeStuff(doSomeStuff(null, someStuff));
            }
    
    
    
    if(s1.getAnotherStuff()==null){
    s1.setAnotherStuff(s0);
    return s1;
    } else {
    Stuff myStuff = doSomeStuff(s1,s1.getAnotherStuff());
    s1.setAnotherStuff(s0);
    return myStuff;
    }
    }

    Does it have any bugs or edge cases where it will not execute?
    Describe the time complexity of the function and comment on its effectiveness.

    - chaos on June 22, 2012 in United States Report Duplicate | Flag
    Amazon Java

Country: United States


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Think of Stuff as tree and somestruff as rightchild and otherstuff as leftchild. Now problem is easy :)

- Abhishek on June 22, 2012 | Flag Reply
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Does it have any bugs or edge cases where it will not execute?
Describe the time complexity of the function and comment on its effectiveness.

- chaos on June 23, 2012 | Flag
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Nullyfy all tree elements

- Anonymous on June 23, 2012 | Flag Reply
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Does it have any bugs or edge cases where it will not execute?
Describe the time complexity of the function and comment on its effectiveness.

- chaos on June 23, 2012 | Flag
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-1
of 1 vote

is it not doing the recursive call, which ends in indeifinite loop

Stuff someStuff = s1.getSomeStuff();
        if(someStuff != null){
            s1.setSomeStuff(doSomeStuff(null, someStuff)); // recursive call here
        }

- Sathiya Moorthy on July 10, 2012 | Flag Reply
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0
of 0 votes

not necessarily as getsomeStuff() may return null as well.

- murlikrishna.b on July 01, 2013 | Flag


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