Cupofdsa.online

cupofdsa.online Profile

Title

Free DSA Practice Online | CupOfDsa - Free Java DSA Practice & Compiler

Description

Start free DSA practice on CupOfDsa (cupofdsa.online). Solve 200+ curated Data Structures and Algorithms problems with our free online Java compiler, test cases, pattern notes, and daily streaks. 100% free with no paywall.

Tags

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Edit Site Info

What technologies does cupofdsa.online use?

These are the technologies used at cupofdsa.online. cupofdsa.online has a total of 7 technologies installed in 6 different categories.

PaaS 1

Amazon Web Services

CDN 1

Cloudflare

Font Scripts 1

Google Font API

Authentication 1

Google Sign-in

Miscellaneous 2

HTTP/3 Open Graph

Hosting 1

Cloudflare DNS

cupofdsa.online Traffic Analysis

There's no enough data about cupofdsa.online traffic.

Daily Unique Visitors

n/a

Monthly Visits

n/a

Pages per Visit

n/a

Daily Pageviews

n/a

Avg. Visit Duration

n/a

Bounce Rate

n/a

Global Reach

n/a

HypeRank

n/a

*All traffic values are estimates only.

cupofdsa.online SEMrush Overview

SEMrush is a complete online advertising and marketing platform that gives a wide variety of tools and features to help businesses and marketers improve their online visibility and optimize their digital marketing strategies.

Domain

cupofdsa.online

RankBased on keywords, cost and organic traffic

n/a

Organic KeywordsKeywords in top 20 Google SERP

0

Organic TrafficVisitors coming from top 20 search results

0

Organic CostEquivalent Google Ads spend for the same traffic

$0.00

Full SEMrush Report →

Backlinks Report

Cupofdsa.online has a total of 22 backlinks from 13 referring domains.

Ad Experience Report

Summary of the ad and abusive experience ratings Google assigns to cupofdsa.online, per platform.

Where is cupofdsa.online hosted?

Cupofdsa.online may be hosted in multiple data centers distributed in different locations around the world. This is probably just one of them.

Other sites hosted on 104.21.95.18

How fast does cupofdsa.online load?

The average loading time of cupofdsa.online is 752 ms. The Desktop speed index is 94 and mobile speed index is 83.

Does cupofdsa.online use compression?

Website compression is the process of reducing the size of website files, such as HTML, CSS, JavaScript, and image files, to improve website performance and load times. Compressing website files can significantly reduce the amount of data that needs to be transferred from the server to the user's browser, resulting in faster page load times and improved user experience. Files on cupofdsa.online are reduced by 73%.

Google Safe Browsing

Google Safe Browsing is a service provided by Google that helps protect users from visiting websites that may contain malicious or harmful content, such as malware, phishing attempts, or deceptive software.

WOT MyWot.com Reputation Ratings

MyWOT (short for "My Web of Trust") is a web-based reputation and rating service that provides users with information about the trustworthiness and safety of websites.

Status

SAFE

SSL Checker SSL Certificate Verify

An SSL (Secure Sockets Layer) certificate is a digital certificate that establishes a secure encrypted connection between a web server and a user's browser. It provides authentication and encryption, ensuring that data transmitted between the server and the browser remains private and protected. cupofdsa.online supports HTTPS.

Security Headers

HTTP security headers tell browsers how to protect visitors: force HTTPS, block clickjacking and limit what scripts can do. cupofdsa.online sends 0 of the 6 recommended security headers, and its SSL certificate is issued by Google Trust Services.

Strict-Transport-Security

missing

Content-Security-Policy

missing

X-Frame-Options

missing

X-Content-Type-Options

missing

Referrer-Policy

missing

Permissions-Policy

missing

SSL issuer

Google Trust Services

SSL expires

2027-01-09 in 83 days

Email Security

SPF, DKIM and DMARC are DNS records that prove which servers may send email for a domain and tell receivers what to do with forged messages. cupofdsa.online does not receive email, and without SPF/DMARC its name can still be spoofed in emails.

Email provider

no mail server (MX)

SPF

missing

DMARC

missing

DKIM

not found on common selectors

DNSSEC

not signed

AI Crawlers

Websites use robots.txt to allow or block AI crawlers that collect content for training and AI search. cupofdsa.online does not block any known AI crawler.

llms.txt

not found

Verify HTTP/2 & HTTP/3 Support

HTTP/2 (Hypertext Transfer Protocol version 2) is a major revision of the HTTP protocol, which is the foundation of data communication on the World Wide Web. It was developed as an improvement over the previous HTTP/1.1 version to enhance web performance and efficiency. HTTP/3 goes a step further and runs over QUIC instead of TCP, for faster connections and better performance on unreliable networks.

Http Header

HTTP headers are extra portions of records despatched among a consumer (which include an internet browser) and a server at some stage in an HTTP request or response. They offer instructions, metadata, or manipulate parameters for the conversation among the consumer and server.

date: Sat, 17 Oct 2026 18:51:34 GMT
content-type: text/html
cf-ray: a4c17ed23a5a5d7d-FRA
cf-cache-status: DYNAMIC
nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
last-modified: Sat, 17 Oct 2026 18:43:34 GMT
server: cloudflare
x-amz-id-2: DMpDScXK0aNJkcnqe8lYbvctrrEox9ft4BK3uGl1Wue8CHL2ifXmzSFs5GrbD7kO5Khpb95kbMg=
x-amz-request-id: 4BXNNY8TP4T63SWD
report-to: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=yAkF6pmZQyPBt%2FQJ52x2kqJUZ0FAxeAZrV%2F0cWzuQUDUrAWxdyfwk5E5WjDEz0fYGvlUPFK3QGjGJI%2FMH96LoUDiJkrTAwlMLfM4xuZWrEbSWBzav9BHpmiO71KWoWHMBmvXzEt77NdMDeQV%2F7E%3D"}]}
content-encoding: br
alt-svc: h3=":443"; ma=86400

DNS Lookup

DNS entries (Domain Name System) are a critical component of the Internet infrastructure. They act as directories that translate human-readable domain names (such as example.com) to machine-readable IP addresses. DNS records are stored on DNS servers and help forward internet traffic efficiently.

Whois Lookup

Domain WHOIS is a public database that provides information about domain names, including registered owners, contact information, domain registrars, registration and expiration dates, name servers, and other relevant information. Domain registration for this website began on October 8, 2026 and will expire on October 8, 2027 if not renewed. This website is now assigned through the registrar HOSTINGER operations, UAB. The WHOIS data for this website's domain was last updated on October 13, 2026.

Domain Created

2026-10-08

Domain Expires

2027-10-08

Domain Updated

2026-10-13

Domain Age

9 days

Domain Registrar

HOSTINGER operations, UAB

Domain Name: cupofdsa.online
Registry Domain ID: DO_f482ed2d56e08a544e0f3fb2c3289865-RADIX
Registrar URL: https://www.hostinger.com
Updated Date: 2026-10-13T03:18:01.100Z
Creation Date: 2026-10-08T03:17:36.309Z
Registry Expiry Date: 2027-10-08T03:17:36.309Z
Registrar: HOSTINGER operations, UAB
Registrar IANA ID: 1636
Registrar Abuse Contact Email: 
Registrar Abuse Contact Phone: +370.64503378
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: conrad.ns.cloudflare.com
Name Server: janet.ns.cloudflare.com
DNSSEC: unsigned
URL of the ICANN RDDS Inaccuracy Complaint Form: https://icann.org/wicf

>>> Last update of WHOIS database: 2026-10-17T18:51:47.866Z