Symphony Services Interview Question for Production Engineers


Country: India
Interview Type: In-Person




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Tortoise and Hare algorithm

- lklein September 16, 2011 | Flag Reply
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If link of any node is same as node of any previous or first node, it becomes a loop.

- Manish Singh September 24, 2011 | Flag Reply
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If you not able to detect the start and end of the circular linked list in a traversal, it will result in looping.

To avoid this detect the start and the end of the linked list. It can be done by,

Way -1
Have an temp variable pointing to your starting location. So when you iterate everytime check for the equality.

Way -2
Have two temp pointers. Pointers moves one location for every iteration and pointer b moves two locations for one iteration. The point where and b meets together is end of the linked list.

Note : Pointer B will have to be iterated twice.

- sureendarraju October 04, 2011 | Flag Reply
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I have a doubt if cyclic linked list is a special case of loop in linked list?
Or, the meaning of loop in a linked list is that the loop should be in between the list without forming a cyclic linked list out of it.
Please clarify.

- ashish January 25, 2012 | Flag Reply
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Traverse linked list using two pointers. Move one pointer by one and other pointer by two. If these pointers meet at some node then there is a loop. If pointers do not meet then linked list doesn’t have loop.

- BJ September 16, 2012 | Flag Reply


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