Custom domain setup in No-Code - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding DNS Records for Custom Domains

When setting up a custom domain for a website, which DNS record type is primarily used to point a domain name to an IP address?

A A record

B CNAME record

C TXT record

D MX record

💡 Hint

Think about the record that connects a domain directly to a server's IP address.

An A record maps a domain name to an IPv4 address, which is essential for directing traffic to the correct server.

📋 Factual

intermediate

Purpose of CNAME Records in Custom Domains

What is the main purpose of a CNAME record when configuring a custom domain?

A To specify the IP address of a server

B To redirect email traffic to a mail server

C To verify domain ownership with a text string

D To alias one domain name to another domain name

💡 Hint

Consider how you can make one domain name point to another domain name instead of an IP.

A CNAME record creates an alias from one domain name to another, allowing multiple domain names to point to the same destination.

🚀 Application

advanced

Steps to Verify Domain Ownership

You want to verify ownership of your custom domain to enable SSL certificates. Which method is commonly used for this verification?

A Adding a TXT record with a verification code

B Uploading a verification file to your website root

C Changing the domain's A record to a verification IP

D Adding an MX record with a specific value

💡 Hint

Think about DNS records that can hold text information for verification.

Adding a TXT record with a verification code is a common way to prove domain ownership without changing website content.

🔍 Analysis

advanced

Impact of Incorrect DNS TTL Settings

What is the likely effect of setting a very high TTL (Time To Live) value on your DNS records during a custom domain setup?

A Changes to DNS records will propagate faster globally

B DNS changes will take longer to update across the internet

C It will cause immediate DNS resolution failures

D It will automatically renew SSL certificates

💡 Hint

TTL controls how long DNS information is cached by servers.

A high TTL means DNS servers keep cached information longer, so updates take more time to spread worldwide.

❓ Reasoning

expert

Troubleshooting Domain Not Resolving

Your custom domain is not resolving to your website after setup. Which of the following is the most likely cause?

A You added a TXT record for verification but no A record

B You set the TTL value too low on your DNS records

C You forgot to update the domain's NS (Name Server) records to point to your hosting provider

D You used a CNAME record pointing to an IP address instead of a domain name

💡 Hint

Think about what controls which servers manage your domain's DNS records.

If the NS records are not updated to the hosting provider's servers, DNS queries won't reach the correct place, causing the domain not to resolve.