iSQI CTFL-PT_D Exam - Topic 1 Question 31 Discussion

Actual exam question for iSQI's CTFL-PT_D exam

Question #: 31
Topic #: 1

If Emily is conducting a performance test to determine that a system exposed to a load can respond to a high number of concurrent users during short periods of time that occur on specific days and at specific times, and then return to a stable state.

What type of performance testing is Emily conducting?

SELECT ONE OPTION

AEndurance testing

BSpike testing.

CConcurrency testing.

DLoad testing.

Show Suggested Answer

Suggested Answer: B

Spike testing involves subjecting a system to a significant increase in load for short periods of time to determine if it can handle sudden spikes in traffic. Emily's scenario of testing a system's response to a high number of concurrent users during specific periods and then returning to a stable state fits the description of spike testing.

* ISTQB Performance Testing Syllabus

* ISTQB Glossary

by Lyndia at Jan 05, 2026, 05:16 AM

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Nell

2 days ago

I think it's Spike testing. High load for short times.

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Avery

8 days ago

Nah, it’s endurance testing for sure.

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Raymon

13 days ago

Wait, is she really testing for spikes? That’s surprising!

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Tori

18 days ago

Definitely load testing, right?

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Stephaine

23 days ago

I think it's actually concurrency testing.

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Micah

28 days ago

Sounds like spike testing to me!

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Robt

1 month ago

Haha, I bet Emily's system is going to crash and burn no matter what kind of testing she does. Good luck, Emily!

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Eugene

1 month ago

B) Spike testing sounds like the right choice. Gotta be ready for those unexpected traffic spikes, am I right?

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Elbert

2 months ago

D) Load testing seems like the best fit. The system is being exposed to a high load, so that's what they're testing for.

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Aliza

2 months ago

I think C) Concurrency testing is the correct answer here. The question mentions testing for a high number of concurrent users.

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Cyril

2 months ago

Definitely B) Spike testing. That's the one that tests for sudden increases in user load.

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Yolando

3 months ago

I practiced a question similar to this, and I think the answer is spike testing since it specifically mentions short periods of high load.

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Ressie

3 months ago

I feel like this is definitely related to concurrency testing since it mentions high numbers of concurrent users, but I'm not 100% confident.

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Doyle

3 months ago

I'm not entirely sure, but I remember something about load testing being more about sustained usage rather than short bursts.

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Michel

3 months ago

I think Emily is doing spike testing because it focuses on sudden increases in load, right?

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Jody

3 months ago

This seems like a combination of spike testing and load testing. The system needs to handle high concurrency for short periods, but also return to a stable state, so it's testing both the spike and the overall load capacity.

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Kerry

3 months ago

Hmm, I'm not sure. It could be load testing or concurrency testing as well. I'll have to think this through carefully.

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Pamella

4 months ago

Definitely spike testing. The key is the system needs to handle the high load and then return to normal, which is exactly what spike testing is for.

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Lorrine

4 months ago

I'm a bit confused - the question mentions both high concurrency and a return to a stable state, so I'm not sure if it's just spike testing or something else.

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Paulina

4 months ago

This sounds like spike testing to me - the system needs to handle high concurrency for short periods of time.

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