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Amazon Interview Question for Software Engineer / Developers






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2
of 2 vote

2 scale needed ..
1> 1-50
2> 25-75
if(1==on&&2==on) weight is 25-50
if(1==on&&2==of) weight is 1-25
if(1==of&&2==of) weight is 75-100
if(1==of&&2==on) weight is 50-75

- awsomist October 03, 2010 | Flag Reply
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0
of 0 votes

nice soln...

- Arang October 04, 2010 | Flag
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0
of 0 vote

two scales of 0-25 and 50-75 are needed.
Any weight between 25-50 &75-100 will be meaesured as follows:
measure two reference weights y1=>(0-25) and y2=>(50-75).
Now,for any unknown weight x, if both (x+y1)&&(x+y2) false=>
x belongs to (75-100) else (25 to 50) group.
correct me if wrong.

- vijay October 03, 2010 | Flag Reply
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0
of 0 votes

"you can weigh only 1 ball at a time"

- Sean December 08, 2011 | Flag
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0
of 0 vote

Ans is 2

1st Scale category (1-50)
if BULB IS ON

- Nitin October 03, 2010 | Flag Reply
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0
of 0 votes

Ans is 2

1st Scale category (1-50)
if BULB IS ON
2nd Scale Category (1-25)
if BULB IS ON
Put in Bucket A
if BULB IS OFF
Put in Bucket B
if BULB IS OFF
2nd Scale Category (50-75)
if BULB IS ON
Put in Bucket C
if BULB IS OFF
Put in Bucket D

- Nitin October 03, 2010 | Flag
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0
of 0 votes

Ans is 2

1st Scale category (1-50)
if BULB IS ON
{
2nd Scale Category (1-25)
{
if BULB IS ON
Put in Bucket A
else
Put in Bucket B
}
}
else
{
2nd Scale Category (50-75)
{
if BULB IS ON
Put in Bucket C
else
Put in Bucket D
}
}

- Nitin October 03, 2010 | Flag
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0
of 0 vote

Quick question,
what if the weight is 50.. where would you put it/?? 25-50 or 50-75??

- chennavarri October 04, 2010 | Flag Reply
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0
of 0 votes

If the weight is 50, we can keep in A or B. Its our choice..

- Sunil October 16, 2010 | Flag
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0
of 0 vote

2 scales needed
its a simple binary representation as we have 4 buckets
00
01
10
11

scale->	25-75	50-100	bucket
weights
  |
  v
 12	  0	  0	   A

 28	  1	  1	   B

 60	  1	  1	   C

 89	  0	  1	   D

- ketz February 01, 2011 | Flag Reply
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0
of 0 votes

A small edit to my example

scale->	25-75	50-100	bucket
weights
  |
  v
 12	  0	  0	   A

 28	  1	  0	   B

 60	  1	  1	   C

 89	  0	  1	   D

- ketz February 01, 2011 | Flag
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0
of 0 vote

The wording here is a bit unclear. Which category does a 25kg ball fit into? 0-25 or 25-50?

- Sean December 08, 2011 | Flag Reply


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