WGU (KVO1) Web Development Applications Exam - Topic 3 Question 1 Discussion

Actual exam question for WGU's WGU (KVO1) Web Development Applications exam

Question #: 1
Topic #: 3

[All WGU (KVO1) Web Development Applications Questions]

Given the following code:

Which type of user input does the developer request by specifying the pattern attribute?

ADate

BCountry code

Cprice

DLatitude/longitude

Show Suggested Answer

Suggested Answer: D

The pattern attribute in the <input> element is used to specify a regular expression that the input's value must match for it to be considered valid. The given pattern -?d{1,3}.d+ matches strings that represent decimal numbers with an optional negative sign, typically used for latitude and longitude values.

Pattern

-? allows for an optional negative sign.

d{1,3} matches one to three digits.

. matches a literal dot.

d+ matches one or more digits.

Usage Example:

This pattern ensures the input matches the format of latitude/longitude values.

MDN Web Docs on <input> pattern attribute

Regular Expressions Documentation

by Glenn at Nov 25, 2025, 02:20 PM

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Elza

12 hours ago

Wait, can it really be used for dates too?

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Matthew

6 days ago

Definitely latitude/longitude!

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Tuyet

11 days ago

I think it's more about price inputs.

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Coral

16 days ago

It's for validating formats, usually for things like country codes.

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Francoise

21 days ago

Haha, imagine if the developer was asking for a price and used a pattern for a phone number. That would be a mess!

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Shawnda

26 days ago

I agree, the pattern seems to be for a country code or phone number format.

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Wynell

1 month ago

The pattern attribute looks like it's asking for a phone number or zip code, not a date or latitude/longitude.

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Brice

1 month ago

B) Country code

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Rasheeda

1 month ago

I’m leaning towards price since it often needs specific formatting, but I’m not confident about that.

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Lyla

2 months ago

I remember practicing a question about input validation, and I think it was related to latitude/longitude formats. Could that be the answer?

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Naomi

2 months ago

I think the pattern attribute is used for validating specific formats, but I'm not entirely sure which one it applies to here.

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Valentine

2 months ago

Ah, I remember learning about the pattern attribute in my web dev class. It's used to validate the format of user input, so the correct answer is probably B) Country code, since country codes often have a specific pattern.

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Aimee

2 months ago

I think it's B) Country code. The pattern looks like a code format.

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Soledad

2 months ago

The pattern attribute is used to validate the format of the input, so it's likely asking for a specific type of data like a date, country code, or geographic coordinate. I'll try to reason through the options and see which one makes the most sense based on the typical use cases.

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Lavera

2 months ago

I'm a bit confused on this one. The options don't seem to match the typical use cases for the pattern attribute that I've seen. I'll have to think it through carefully and eliminate the options that don't seem to fit.

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Tamesha

3 months ago

I agree, it's mostly for country codes.

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Narcisa

3 months ago

I feel like the pattern attribute could be used for country codes too, but I can't recall the exact format it requires.

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Hollis

3 months ago

Okay, the pattern attribute is used to specify a regular expression for validating the input. Based on the options, I'm guessing it's probably asking for a country code, since those often have a specific pattern.

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Meaghan

3 months ago

Hmm, the pattern attribute looks like it's used for validating user input, but I'm not sure exactly what type of input it's requesting here. I'll need to review my notes on HTML5 form validation to figure this one out.

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