ISTQB Foundation Level | 4.2.2 Boundary Value Analysis | 2 & 3 Point Analysis | ISTQB Tutorials

[@karthikas7816]

In your first question, they have asked only the valid values of boundary values. The answer I saw in your video is option C which includes the 17 and 31 also but which comes under invalid section right?

[@abdullfattahalghurbani7299]

Thanks its really helpful, just change the third class from - in all the slides

[@virginiekalenzi7140]

Hi, Thanks so much for your clear explanation it made everything clear for me! although I would like to ask if you can make a video about BVA coverage in %, I saw an exercise about a system that marks student scores, they asked how much percentages the prepared test cases have covered. If you can make a video about that it will be helpful.

[@anonimanonim2430]

How come in 5:07 in BVA in "VALID collection of boundry values" we have 17 and 31 which are in invalid range and in 6:51 in BVA and EP we only consider 25 which is only in valid range without numbers in invalid range? It doesn't feel consistent at all and makes you frustrated right away with certification approach as they were trying to make the most money out of the most confusing questions they can think of....

[@TMSQUARETECH]

Hi Anonim, There is a difference between "Valid collection of value" and Valid Equivalence Value or Valid Boundary Values" It's as good as saying "valid set of test data" and valid test data" So valid set and collection means it's the values which you will derive after applying techniques and valid value are exclusively valid data separating from invalid values.

[@anonimanonim2430]

@@TMSQUARETECH Ok, now it makes more sense. Thank you for your answer. Though I have to admit it is confusing

[@raveenarenjarla103]

can you please explain this question in detail ? The digital Thermometer uses 7 colors to show the ambient temperature. Each color spans a range of just 5 Deg. C, with an operating minimum and maximum of minus 15 Deg. C and 60 Deg. C. Which of the following values is LEAST likely to have been identified when applying the boundary value test design technique? A. 60 Deg. C B. 0 Deg. C C. 12 Deg. C D. 25 Deg. C

[@TMSQUARETECH]

Hi Raveena, Please see the response to your query in my Q & A playlist here - kzbin.info/www/bejne/pmSQc5d8rKehh5Y

[@vishalkumarchoudhary4639]

Hi Sir, In last question, option C looks more convenient. In C option, all values can be part of BVA or EP. But in Option B, 25 is not valid in BVA. Please make me correct, if i'm wrong?

[@mi_ra_kee]

The value 31 falls in the invalid category of EP, so cannot be included

[@thepriyanka100]

thank you....i came across one question The speedometer of a car uses 7 colors to show the speed. Each color covers a range of 20 km, with an operating minimum and maximum of 0 and 140. Which of the following values is LEAST likely to have been identified when applying the boundary value test design technique? a) -1 b) 0 c) 7 d) 121 i easily i know its not a or b....ans would be 7 or 121.....they said answer is 7...my question is why not 121

[@TMSQUARETECH]

Hi Priya, Nice question. By reading the scenario it seems the only possible answer is 121. As the intervals are of 20 km each and min speed can be 1. As per my understanding 7 is a diversion for 7 colors but the author have mistaken in giving the right answer. As I always suggest be confident with the logic of applying a technique. Then you can determine the wrong answer in such questions.

[@karpagambigaipalaniswamy5291]

I did not understand how it is 121? my answer would be 7 . 1st partition- 1 to 20 (invalid Negative 1, LB 0, RB 20 ), 2nd part - 21 to 40(LB-21,RB 40),3rd part- 41 to 60(LB-41,RB-60),4th part - 61 to 80(61,80),5th - 81-100(81,100), 6th - 101 to 120(101,120), 7th - 121-140(121,140) . The only value we cannot apply is 7 in here... Please correct if my understanding is wrong

[@studywithme2870]

hey, 121 is already a boundary value because equivalence partitions will be this way 0 -20 I 21-40I 41-60 I 61-80I 81-100 I 101-120 I 121-140 with -1 and 141 Invalid values

[@mahinthanganesagugan6550]

Is there any called 2,3 boundary analysis or videos content is enough?

[@TMSQUARETECH]

Yes it is. We call it as 2-point analysis and 3-point analysis Using 2-point analysis we consider 2 values per boundary Using 3-point analysis we consider 3 values per boundary For example If the given range is 18-30 as valid range then the boundary values are 2-point analysis - 17,18 & 30,31 3-point analysis - 17,18,19 & 29,30,31

[@swatithakur7120]

​@@TMSQUARETECH what if questions hasn't specified 2 point or 3 point?

[@djqris11]

I'm still confused how you got that 25 after 18 and 30. Please assist

[@americanboychronicles]

First he shows BVA, which is 18 and 30, and second part of the question was "valid equivalence value" - it can be any number in range between 18 and 30, in out case it is 25

[@ali-vl8mp]

Isolation from development might lead to partial testing of a failure.why?

[@Alekya_allari]

Hi again.. what about 2 point and 3 point BVA?

[@TMSQUARETECH]

For example, let us take the field to enter a date to a field. Imagine the month has 31 days and that no decimal values are accepted by the system. So, Any value from 1-31 would be valid Values below 1 and values above 31 would be invalid Based on the above, we can derive the values for Boundaries like this : 3 point boundary value method -> the boundary values 0,1,2 & 30,31,32 2 point boundary value method -> the boundary values 0,1 & 31,32

[@Alekya_allari]

TM Square Technology Solutions thank u👍🏻

[@himmelsdemon]

@@TMSQUARETECH To generalize, with 3 point boundary method, the boundary values are LB-1, LB, LB+1, RB-1, RB, RB+1; with 2 point boundary method, the boundary values are LB-1, LB, RB, RB+1. Correct?

[@TMSQUARETECH]

@@himmelsdemon Yes!!!

[@suryaprakashrajagopalan4687]

Hello sir Can u pls explain the answer to this question Postal rates for “light letters” are 25 paise up to 10grams,35 paise up to 50grams plus extra 10paise for each additional 25gms up to 100gms. Which test inputs(in GMs) would be selected using equivalence partitioning. If a candidate is giving an exam of 40 questions .He should get 25 marks to pass (61%) and should get 80% for distinction , what is the equivalence class.

[@TMSQUARETECH]

Hi Surya, You can find the response to your second question here - kzbin.info/www/bejne/p17Imp6VhK2gZ7c

[@ohadavni]

Great tutoring!!!!

[@TMSQUARETECH]

Glad it was helpful!

[@MrAhmedhawary]

you are really amazing

[@TMSQUARETECH]

Thanks a lot Ahmed!!

[@monofruit5020]

What about the 3 value technique?

[@babalolaolalekan1171]

How was 4 the answer I need more details on that pls.

[@harshinirao7454]

Hello sir Thank you so much for the videos Could you please share the PPTS

[@chandramohanbhuvana]

Hello Sir, Can I please get the solution for the below. I think the answer is D, not sure if i am right. A program validates a numeric field as follows: values less than 10 are rejected, values between 10 and 21 are accepted, values greater than or equal to 22 are rejected. Which of the following covers the MOST boundary values? a. 9,10,11,22 b. 9,10,21,22 c. 10,11,21,22 d. 10,11,20,21

[@TMSQUARETECH]

Hi Bhuvana The ranges created in this scenario will be Less than or equal to 9 10-21 Greater than of equal to 22 Thus your boundary values will be 9,10,21,22 You went wrong considering inside the boundary, where 10 & 21 are already inside so you should consider other two outside boundary. The right answer here is B

[@chandramohanbhuvana]

@@TMSQUARETECHOk Sir, I understand now. Thank you so much.

[@architjain7478]

Sorry not able to understand this scenario how it will be 18,30,25? can you please explain in more detail. Thanks

[@TMSQUARETECH]

Hi Archit, 18 and 30 are my valid boundaries and 25 is within that to be taken as a valid equivalence partition value. All other options are either having invalid value for BVA or EP

[@salikhanan]

what about A boundary value for a valid partition is a valid boundary value. A boundary value for an invalid partition is an invalid boundary value. For each variable we check- Minimum value. Just above the minimum. Nominal Value. Just below Max value. Max value. Your video is different can you explain

[@anusankar9735]

The digital “Rainbow Thermometer” uses 7 colors to show the ambient temperature. Each color spans a range of just 5 Deg. C, with an operating minimum and maximum of minus 5 Deg. C and 30 Deg.C. Which of the following values is LEAST likely to have been identified when applying the boundary value test design technique? Sir how to calculate boundary value for this problem

[@TMSQUARETECH]

Hi Anu, I don't see the options but let's solve this here your ranges will be -5 to 0, 1 to 5, 6 to 10, 11 to 15, 16 to 20, 21 to 25 and 26 to 30 This covers the seven colors to seven ranges. All the above mentioned values are boundary values but additionally you will have 2 more that is -6 and 31 for each end. Now you can pick the option which don't have these values as right answer.

[@anusankar9735]

Sir thank u so much for ur valuable reply.. In istqb dump answer is 12deg c.. I don know how..

[@anusankar9735]

Sir thank u so much got d answer....

[@TMSQUARETECH]

That s not istqb dump.. That is external dumps created by unknown people. ISTQB have 3 official sample papers available on istqb.org. Other than that all are unofficial. refer at your risk that main ruin your confidence

[@swathirajagopal5705]

Hi, for the second question - which of the given option consists of valid collection of boundary values, all of the options mentioned contains at least one invalid boundary 1. 16,17 in option 1 2. 17,31 in option 2 &3 3. 31 in option 3 Could you explain how the answer is derived in this case. Thanks.

[@shivalipawar5353]

I too have the same question.

[@cipriansmith3373]

​@@shivalipawar5353 If I'm looking at the correct question, Accepted age range is anything between 18 & 30 inclusive so using the table as an example = 31 (Invalid) available options are 1) 16 17 19 30

[@ancazavoianu8256]

I also have the same question. Because it said that we need the valid bounderies

[@iam_varunsharma]

I don't understand the last example you explained. Can you please explain in simple way?

[@TMSQUARETECH]

Hi Varun, Explain this on chat may not help you. Please join my LIVE which happens every Saturday 7p to 8pm IST. Will explain in detail.

[@kaustubh3230]

Thanks dude ❤️

[@TMSQUARETECH]

Happy to help

[@ngocanhnguyen1440]

thank you so much for your explanation

[@TMSQUARETECH]

You're welcome...

[@franklinkyle7607]

I guess it's pretty off topic but does anyone know of a good place to watch new series online ?

[@brodieatlas7295]

@Franklin Kyle Try Flixzone. Just google for it =)

[@graysonelijah5979]

@Franklin Kyle Try flixzone. You can find it by googling :)

[@harrisonwestley7537]

@Franklin Kyle try Flixzone. You can find it by googling =)

[@alkasahu1524]

Nice explanation.

[@TMSQUARETECH]

Glad you liked it

[@myWayIn619]

Thank you!

[@TMSQUARETECH]

You're welcome!

[@yuktisanghavi4645]

Thaankyouuuu ❤️

[@TMSQUARETECH]

My Pleasure Yukti

[@TheDeeptinamdeo]

Hello Sir , Could you pls. let me know , what should be the correct answer for below question and why ? As per answer sheet its C. A wholesaler sells printer cartridges. The minimum order quantity is 5. There ISA 20% discount for orders of 100 or more printer cartridges. You have been asked toprepare test cases using various values for the number of printer cartridges ordered.Which of the following groups contain three test inputs that would be generated usingBoundary Value Analysis? A. 5, 6, 20 B. 4, 5, 80 C. 4, 5, 99 D. 1, 20, 100

[@TMSQUARETECH]

The Answer will be C, As the ranges created will be less than or equal to 4 - you can't place order 5 to 99 - this is the range to place order greater than or equal to 100 - you get 20% off Thus boundary values will 4,5,99,100 but in question they have given sets thus from the option C covers 3 of them. Hope that goes inline with the understanding on this.

[@TheDeeptinamdeo]

@@TMSQUARETECH Got it Sir . Thanks

[@TauroChuck]

thanks for the video

[@TMSQUARETECH]

You're welcome

[@ahmednaeem957]

I try best but I don't know how option C is correct, can you explain respected teacher? Q: A smart home app measures the average temperature in the house over the previous week and provides feedback to the occupants on their environmental-friendliness based on this temperature. The feedback for different average temperature ranges (to the nearest °C) should be: Up to 10°C - Icy Cool! 11°C to 15°C - Chilled Out! 16°C to 19°C - Cool Man! 20°C to 22°C - Too Warm! Above 22°C - Hot & Sweaty! Using two-point BVA, which of the following sets of test inputs provides the highest level of boundary coverage? a) 0°C, 11°C, 20°C, 22°C, 23°C b) 9°C, 15°C, 19°C, 23°C, 100°C c) 10°C, 16°C, 19°C, 22°C, 23°C d) 14°C, 15°C, 18°C, 19°C, 21°C, 22°C Answer: C

[@TMSQUARETECH]

Hi Ahmed, The ranges are 0-10 11-15 16-19 20-22 23 and above if you have understood the technique we can understand the above written values are all boundary values. Whereas, as per the question we need to identify the option which covers maximum boundary values. in option a - 11,20,22,23 are boundary values in option b - 15, 19, 23 are boundary values in option c - 10, 16, 19, 22, 23 are boundary values in option d - 15, 19, 22 are boundary values based on this analysis the right answer is C as this covers maximum boundary values. I hope this makes it clear to understand the right answer.

[@shitalmdhore]

​@@TMSQUARETECH As it is two-point BVA question, option d looks more accurate.

[@shitalmdhore]

Can u plz clear my doubt?

[@shwetaj8742]

@@shitalmdhore Option D only covers 3 boundary values while option C covers 5 boundary values