Interview Puzzles

1. 8-Liter,5-Liter,3-Liter Puzzle

We have 3 containers, of volumes 8, 5, and 3 liter. The 8-liter container is full of water. The containers have no measurement lines on them. How could you measure exactly 4 liter using only those containers?

This question was actually asked in a popular movie – Die Hard With A Vengeance.
Also asked in one of the interviews when i attended?

Try figuring this one out on your own before reading the answer. It should be clear that the goal is to end up with 4 liter in the 5 liter jug, since having 4 liters in the 3 liter jug is impossible.

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8-Liter 5-Liter   3-Liter

8        0          0
3        5          0
3        2          3
6        2          0
6        0          2
1        5          2
1        4          3
4        4          0