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Preguntas de entrevista para el puesto de Ingeniero De Control De Calidad De Software compartidas por los candidatos

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A un Software QA Engineer le preguntaron...7 de octubre de 2010

### There are three boxes, one contains only apples, one contains only oranges, and one contains both apples and oranges. The boxes have been incorrectly labeled such that no label identifies the actual contents of the box it labels. Opening just one box, and without looking in the box, you take out one piece of fruit. By looking at the fruit, how can you immediately label all of the boxes correctly?

49 respuestas

Swaz answer is almost correct however it does not work in all scenarios. lets assume: box 1 is labelled Oranges (O) box 2 is labelled Apples (A) box 3 is labelled Apples and Oranges (A+O) and that ALL THREE BOXES ARE LABELLED INCORRECTLY" Pick a fruit from box 1, 1) if you pick an Orange: - box 1's real label can only be O or A+O - box 1's current label is O - since ALL LABELS ARE INCORRECT then box 1's real label can not be O - box 1's new label should then be A+O by elimination - since ALL LABELS ARE INCORRECT - box 2's label is changed to O - box 3's label is changed to A - SOLVED 2) if you pick an Apple: - box 1's real label can only be A or A+O - box 1's current label is O - since ALL LABELS ARE INCORRECT then box 1's real label can not be O - this still leaves us with the choice between label A and label A+O - which would both be correct - FAILURE Solution: The trick is to actually pick a fruit from the A+O labeled box Pick a fruit from box 3: 1) if you pick an Orange: - box 3's real label can only be O or A - box 3's current label is A+O - since ALL LABELS ARE INCORRECT then box 3's real label can not be A+O - box 3's new label should then be O by elimination - since ALL LABELS ARE INCORRECT - box 1's label is changed to A - box 2's label is changed to A+O - SOLVED 2) if you pick an Apple: - box 3's real label can only be O or A - box 3's current label is A+O - since ALL LABELS ARE INCORRECT then box 3's real label can not be A+O - box 3's new label should then be A by elimination (not O) - since ALL LABELS ARE INCORRECT - box 1's label is changed to A+O - box 2's label is changed to O - SOLVED Menos

It's easier to draw it out. There are only 2 possible combinations when all labels are tagged incorrectly. All you need to do is pick one fruit from the one marked "Apples + Oranges". If it's Apple, then change "Apple + Orange" to "Apple" The "Apple" one change to "Orange" The "Orange one change to "Apple + Orange" If it's Orange, then change "Apple + Orange" to "Orange" The "Apple" one change to "Apple + Orange" The "Orange" one change to ""Apple" Menos

All the three boxes are names incorrectly. SO the bax lebeled Apples+Oranges contains only Oranges or Only Apples. Pick one fruit from it. If it is Orange then lebel the box as Orange. So the box lebeled Oranges contains Apples and the remaining contains both. Menos

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### You have five bottles with pills. One bottle has 9 gram pills, the others have 10 gram pills. You have a scale that can only be used once. How can you find out which bottle contains the 9 gram pills?

5 respuestas

Number the bottles 1-5. Collect a number of pills from each bottle corresponding to their bottle number. So, 1 pill from bottle 1, 2 from bottle 2, etc. If they all had 10 gram pills they should weigh 150 grams. The difference will be the number of the bottle the 9 gram pill came from. Example, bottle 3 has the 9 gram pills. Total weight read will be 147 grams. The difference of 3 is the bottle it came from. Menos

Place all five bottles on the scale. It should say 49 grams on the scale. If you take out one bottle each time. Subtract the scale from before and after the bottle that has been taken off the scale. If it's 9. That's the bottle you're looking at. Menos

What top poster said except you can label the bottles from 0 to 4 and save yourself a little work Menos

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### how to find the closest 2 number in an array of unique positive number

5 respuestas

One solution is to sort the array, then iterate through all neighboring pairs to find the pair with smallest difference. This is O(NlogN) solution. If the integers are bounded, you may be able to sort in O(N) time for an O(N) solution. Menos

public static int[] find2Closest(int[] myArray) { assert(myArray.length &gt;= 2): "myArray needs to be larger than 2"; Arrays.sort(myArray); //quickSort int indexMin1 = 0; int indexMin2 = 1; int min = myArray[indexMin1] - myArray[indexMin2]; for(int k = 0; k &lt; myArray.length-1; k++) { int difference = Math.abs(myArray[k] - myArray[k+1]); if(difference &lt; min) { min = difference; indexMin1 = k; indexMin2 = k+1; } } int[] values = new int[2]; values[0] = myArray[indexMin1]; values[1] = myArray[indexMin2]; return values; } Menos

public class ClosestTwoNumber { public int[] findClosest2Number(int[] arr){ if(arr == null || arr.length diff) { min = diff; num1 = arr[i - 1]; num2 = arr[i]; } } if (num1 == -1 || num2 == -1) { throw new IllegalArgumentException(); } int[] result = new int[2]; result[0] = num1; result[1] = num2; return result; } Menos

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### how to test a toaster?

5 respuestas

I would find a tester and I'd tell him/her to test the toaster by plugging it in. If the toaster doesn't toast the tester, it works; if it toasts the tester, it's broken. Menos

Contined...prior to lowering the bread into the toaster select the lowest heat setting. Once the bread is lowered set a timer to measure length of time before toast cycle completes and toasted bread pops up. Retest on all other heat settings and time each of these. Menos

He means "if you don't get electrocuted then the toaster works. If you die of electrocution then the toaster is broken" lol Menos

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### read in a string and output it backwards

5 respuestas

public void (String input) { if (input == null || input.length == 0) return; for (int i = input.length-1; i &gt;= 0; i--) { System.out.print(input.charAt(i)); } System.out.println(); } Menos

public static void main(String [] args) { String a = "qwerty", rev = ""; //Scanner sc = new Scanner(System.in); //System.out.println("Enter the string : "); //String a = sc.nextLine(); for(int i = a.length()-1; i &gt;= 0; i --) { rev = rev + a.charAt(i); } System.out.println(rev); } Menos

myString[::-1]

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### test life cycle in assurance

4 respuestas

explained all phases of test lifecycle

Software Testing Life Cycle 1.Requirment analysis 2.Test planning 3.Test Designing/Test case development 4.Environment setup 5.Test Execution 7.Test cycle closure/Test reporting Menos

Software Testing Life Cycle 1.Requirment analysis 2.Test planning 3.Test Designing/Test case development 4.Environment setup 5.Test Execution 7.Test cycle closure/Test reporting Menos

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### Why do you want to work for Apple

3 respuestas

I like it.Hahaha

because i cant get into google.

Apple is quite known company, a lot of things I read or heard about it, but never experienced by myself. To work for Apple is a big honor and opportunity to develop my self. Also to exercise myself, what can I do to reach goals and just enjoy to work Menos

### Q9: What shell command renames filename1 to filename2?

3 respuestas

mv

mv filename1 filename2

A9: cp filename1 filename2.

### What was your Final Year Project?

3 respuestas

I explained all the working and mechanism of my Final Year Project

My final year project is game

My BS final year project is Online Complaint management system and in MS my thesis is on Requirements Change Management Issues for E-Government in Pakistan. Menos

### classic java programming problems

3 respuestas

Hey, what kind of Programs/queries were asked

Hey, what kind of Programs/queries were asked

u can find a lot of practice questions online, practice then you should be ready

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