Discuss ISTQB ISTQB-CTFL Exam Topic 1 Question 11

A system has valid input numbers ranging between 1000 and 99999 (both inclusive). Which of the following inputs are a result of designing tests for all valid equivalence classes and their boundaries?

A999.1000.23232.99999.100000

B999.1000.50000.100000.100001

C999.100000

D1000,50000,99999

Suggested Answer: B

A correct list of boundary values for the P input should include the minimum and maximum values of the valid range (15 and 350), as well as the values just below and above the boundaries (14 and 351). Boundary value analysis is a test design technique that involves testing the values at or near the boundaries of an input domain or output range, as these values are more likely to cause errors than values in the middle. Option B satisfies this condition, as it has all four boundary values (14, 15, 350, 351). Option A has two values from the same equivalence class (1000 and 99999), option C has two values outside the range (999 and 100000), and option D has no boundary values at all. Verified Reference:A Study Guide to the ISTQB Foundation Level 2018 Syllabus - Springer, page 34.

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20 comments · newest first

Brittani 10 months ago

C is just way off, not even close to valid ranges!

Esteban 11 months ago

A and B have invalid numbers, so they don't count.

Loreta 11 months ago

Wait, are we sure about that? What about the others?

Cheryl 11 months ago

Totally agree, D covers the boundaries perfectly!

Lilli 11 months ago

D is the only valid set of inputs.

Shay 12 months ago

I feel a bit confused; I thought we were supposed to include both valid and invalid cases, but maybe I misremembered the equivalence class concept.

Ula 12 months ago

I practiced a similar question, and I think option D looks correct since it lists valid numbers within the range.

Jennie 12 months ago

I'm not entirely sure, but I remember something about invalid inputs being outside the range, like anything below 1000 or above 99999.

Penney 1 year ago

I think we need to focus on the boundaries, so inputs like 1000 and 99999 should definitely be included.

Jettie 1 year ago

I'm a little unsure about this one. The wording is a bit confusing, and I want to make sure I understand exactly what they're asking for. Let me re-read the question and think it through step-by-step.

Mayra 1 year ago

This seems straightforward enough. I'll just need to identify the valid input range and then select the option that covers the lower and upper boundaries as well as some values in the middle. Shouldn't be too tricky.

Emiko 1 year ago

Okay, I've got this. The valid input range is 1000 to 99999, inclusive. So the correct answer should include the lower and upper boundaries (1000 and 99999) as well as some values in between, like 50000. Let me double-check the options.

Kris 1 year ago

Hmm, I'm a bit confused by the wording of the question. Are we supposed to choose the set of inputs that represent all the valid equivalence classes and their boundaries? I'll need to think this through carefully.

Precious 1 year ago

This looks like a pretty straightforward question on equivalence class testing. I'll need to identify the valid input range and then choose values that cover the boundaries and some valid values in between.

Louvenia 1 year ago

The key here is to focus on the specific mention of "C&C hosts". Threat logs and botnet reports are likely to contain that kind of information, so I'll go with those.

Lindy 1 year ago

This seems like a classic optimization problem. I'll start by identifying the objective function and the constraints, then use that information to determine the optimal solution. Shouldn't be too difficult.

Carey 1 year ago

Hmm, I'm a bit unsure about this one. I'm trying to decide between B and D. If there's no policy, maybe security activities will only be done by a few people, or maybe the organization just won't be able to implement security consistently. I'll have to think it through carefully.

Tammara 1 year ago

This looks like a tricky question about network redundancy and failover. I'll need to carefully read through the options and think about the specific steps required for implementing NSF.

Tanja 1 year ago

Hmm, I'm a bit unsure about this one. The question doesn't provide much context about the Avaya Aura Media Server, so I'll need to draw on my general knowledge of web application URLs to try to figure this out.

Roselle 1 year ago

Compliance with national standards doesn't sound like a major advantage; I feel like that's more of a requirement than a benefit.

ISTQB-CTFL Exam - Topic 1 Question 11 Discussion