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Systems analyst Interview Questions in United States


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You have 8 pennies, 7 weight the same, one weighs less. you also have a judges scale. Find the one that weighs less in less than 3 steps.

13 Answers

Set two pennies aside, put 3 on each scale and if they weight the same the lighter one is one of the other two, if not it is one of the three on the scale, repeat for the two or three remaining.

A better answer: Split the 8 pennies into 3 groups of 3,3,2 pennies. Weight the first two groups of 3 pennies each. Case 1) - They weight the same. Therefore, take third group of 2 pennies and find the lighter coin. Case 2) Group 1 weights more than Group 2. Take group 2 (3 pennies) and pick any 2 out of 3. If they weight the same, then the third penny is lighter. Answer is trivial if they don't weight the same. It works for any scenario. Always split the groups in 3.

It's a lot simpler than you'd think Divide the current number of coins by two and put them on both sides of the scale, remove the side that weighs more, and divide the lighter side in half, repeat so you start with 8: |||| |||| (4/4) || || (2/2) | | (1/1) Three steps, simple, logical, and and can get the right answer each time.

How many trailing zeros are in the number 5! (5 factorial)?

11 Answers

Given a page size and a number, align the number with the nearest page. (Note: This was a phone interview question. The interviewer and I used an online document to share ideas about this problem.

7 Answers

Given a wireless channel with loss rate 0.1, what's the throughput one can get with retransmission.

8 Answers

identify the number of 1s in an integer is odd or even

7 Answers

There is a body of water that starts with 1 square unit, and doubles in size every day (2 units after 2 days, 4 units after 4 days). It takes 100 days to fill up. How many days would it take to fill if you started with 2 square units?

6 Answers

How familiar are you with the ADDIE model

6 Answers

How can you edit/change the file which has only read permission

4 Answers

The interview questions were pretty average. Each person had questions written down but they didn't seem to be form questions. Average interview questions. The questions were not very technical

5 Answers

Why are man-hole covers round?

5 Answers
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