Hackerrank practice test sql. HackerRank DBMS & SQL Quiz.

Hackerrank practice test sql Copy path. Packages contains two columns: ID and Salary Get certified in technical skills by taking the HackerRank Certification Test Standardised Assessment Assessments are organised around specific skills and are carefully curated based on years of recruiting data from 2000+ companies We recommend you to try the sample test for a couple of minutes, please go through the FAQs to resolve your queries related to the test or the HackerRank platform. Post displaying HackerRank sql problem solving questions and solution. Reason: Fundamental setup and understanding are necessary to start writing SQL queries. First Name. Maximum score is 25 points. Problem Solving (Basic) Problem Solving About. The HackerRank Coding Questions gives a Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. REST API. 50%. Weather Observation Station 4. The CITY table is described as follows: The HackerRank SQL Basic Certification is one of the most sought-after certifications for aspiring developers and data enthusiasts looking to validate The HackerRank SQL Basic Certification is designed to test fundamental Write a SQL query to determine the average monthly rating for each product. Unions-This competency includes using unions to display multiple sets of information This collection provides solutions to the HackerRank SQL Certification Test problems. Quiz; Free Material. 83 KB main. The 🔥 Learn Basics of SQL with Complete SQL Fundamentals for Beginners. A basic understanding and good practice of 170+ solutions to Hackerrank. Settings. Hard SQL (Advanced) Max Score: 50 Success Rate: 78. This competency area includes the understanding of basic concepts like Blocks, Variable Declaration, and Cursor. 66%. It is tightly integrated with Excel, works on computers and mobile devices, and is offered at various levels of capabilities. Blog; Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Works in real-time and it's absolutely undetectable 😎 You're applying for a new job and have a coding problem coming up. Try to understand the constraints in the problem statement and verify the coding or logical approach in your solution to handle different edge scenarios around the problem. This is your one-stop solution for everything you need to polish your skills and ace your interview. 2. 10. They are necessary for optimizing performance, managing complex queries, ensuring data integrity, and leveraging advanced features for high-level query design and development. This repository tracks my progress through the SQL course on HackerRank. Solve Challenge. - mahedei/Hackerrank-SQL-Intemediate-Skills-Certification-Test-Solutions Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Practice above mentioned topics such as arrays, strings, recursion, sorting algorithms, and data structures. HackerRank. Binary Tree Nodes. Ok. This is a sample test to help you get familiar with the HackerRank test environment. 3. 1 of 6; Review the problem statement Each challenge has a problem statement that includes sample inputs and outputs. Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. Ollivander's Inventory. Certificate: SQL Verified. So, without wasting any time, let’s jump to the Meesho_HackerRank_SQL_Interview_Question. But it's an automatic fail if you cheat. Updated Dec 24, 2023; ⚡ Solutions to coding challenges on HackerRank (Python, Java, C++, SQL, Problem Solving & Math) <\> It may be hard to find a sample SQL database for practice that suits all your needs at once, but there are so many reasons why you need one: Grow your solution portfolio before applying to new jobs. Let's walk through this sample challenge and explore the features of the code editor. The sum of all values in LONG_W rounded to a scale of 2 decimal places. We use cookies to ensure These concepts require a deeper understanding of SQL and its ecosystem. 🔥 SQL stands for Structured Query Language. Try Sample Test. Articles Works Shiny Snippets Resume About Contact. Sample Output: 63868-453 Dave: 63550-194 Mary: 57520-0440 You are given three tables: Students, Friends and Packages. Try Sample Test Current projects at work require more SQL skills, so I took the time to brush up my SQL knowledge using the HackerRank coding challenges platform. For example, if the test setter wants to assess your DB programming skills in SQL, you may see only the Microsoft SQL The solutions of all the SQL challenges for all easy, medium and hard challenges on HackerRank executed on MySQL environment compiled with helpful Resources & references related to the challenges Amber's conglomerate corporation just acquired some new companies. The Hard SQL (Advanced) Max Score: 50 Success Rate: 78. Join over 11 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. So you would use either cin or std::cin depending on your namespace. SQL queries on this test can be executed in MySQL, MS SQL, or SQLite databases. SQL window functions are a powerful feature that lets us extract meaningful insights from Include most of SQL practice problems and corresponding solutions on HackerRank - pyusbos/HackerRank-Practice-SQL Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. 68%. Each of the companies follows this hierarchy: Given the table schemas below, write a query to print the company_code, founder name, total number of lead 🔥 Learn Basics of SQL with Complete SQL Fundamentals for Beginners. The test is not official, it's just a nice way to see how much you know, or don't know, about SQL. SQL Syntax - 3. Java MCQs - Challenge Section. All the problems and theirs solutions are given in a systematic and structured way in this post. 2 of 6; Choose a language Select the language you wish to use to solve this Contains solved queries for the Hackerrank SQL (Intermediate) Skills Certification Test 🎓. 8. Accelerate your Job Search. Join my Telegram channel for useful advice for data analysts: Think Broadly. Basic SQL Queries Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. The HackerRank Advanced SQL Certification Forums: The forums are a great place to ask questions and get help from other students. The test contains 25 questions and there is no time limit. It focuses on three main areas: Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Practice hard Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. The questions can be answered in 4 different types of SQL flavours and I decided to answer them using MySQL. 15%. Medium SQL (Basic) Max Score: 25 Success Rate: 98. 108 lines (96 loc) · 1. Whether we are beginners or experienced professionals, practicing SQL exercises is important for improving Overview. Senior data analysts are responsible for analyzing large datasets to identify trends and insights. Breadcrumbs. Maria 10 99. Aug 4, 2023. hackerrank-python hackerrank-solutions hackerrank-javascript hackerrank-30dayschallange hackerrank-sql hackerrank-statistics hackerrank-interview-kit hackerrank-certificates Resources Readme Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Click here to see more codes for Raspberry Pi 3 and similar Family. patient_id: INT: first_name: TEXT: last_name: TEXT: gender: CHAR(1) birth_date: DATE: city: TEXT: province_id: CHAR(2) The SQL online test assesses SQL skills using live coding tasks that require writing CRUD operations in order to extract, combine, and manipulate data. com practice problems using Python 3, С++ and Oracle SQL - marinskiy/HackerrankPractice Verify your SQL Skills. Guestbook. 65%. We use cookies to ensure you have Yes, you can take input from stdin like you normally do. These tasks are excellent for testing your skills and problem-solving abilities. By going through the HackerRank Coding Questions aspirants can easily crack the test. HackerRank is one of This is a sample test to help you get familiar with the HackerRank test environment. Look for shared experiences and solutions from previous candidates. Aggregation. Friends contains two columns: ID and Friend_ID (ID of the ONLY best friend). The HackerRank Skills Certification Test is a standardized assessment to help developers prove their coding skills HackerRank is the market-leading coding test and interview solution for hiring developers. Java MCQs. This project is open-source and available under the MIT License. Each solution is accompanied by comments for clarity, showcasing various approaches and optimizations. We use cookies to ensure you Let's walk through this sample challenge and explore the features of the code editor. This competency area includes configuring a Spring MVC application, Basics of the Spring framework, working with REST APIs, writing a unit test for a simple application, among others. NET Core apps can be created using multiple programming languages. 1 Week Preparation Kit. Weather Observation Station 18. We use cookies to ensure you have the best In this article, we present 11 practice exercises involving SQL window functions, along with solutions and detailed explanations. Nothing much to worry Here's a list of the best platforms to practice SQL, ace your SQL interviews, and land your dream data role. , MySQL, PostgreSQL) and connect to it using a SQL client. SQL is a standard language for storing, mani HackerRank Technical MCQs Test | Domain Test PrepInsta provides you information regarding HackerRank Technical MCQs also known as HackerRank Domain Test on this page. Learn about new or specific This repository contains my SQL solutions to HackerRank challenges, organized by difficulty: Easy, Medium, and Hard. It contains solutions to various SQL problems organized by topics, allowing users to enhance their SQL skills systematically. Let N be the number of CITY entries in Familiarize yourself with the structure and types of questions on platforms like Hackerrank. Practice You might like to solve practice problems on HackerRank. Medium. File metadata and There are many websites and portals to practice SQL for free or for a small fee. A participant’s score depends on the number of test cases a participant’s code submission successfully passes. SQL is a standard language for storing, mani Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. 9. . Nikhitha Perapola. SQL (Intermediate) SQL (Advanced) Difficulty. Remember, mastering SQL is a continuous learning process, and these quiz HackerRank is a great place to compete in Hackathons events, solving futuristic coding problem that are sometimes less relevant with real business problems. In this video You will get the solution for SQL sample test on HackerRank. Steps. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways Write a query to list the contestants ranked in the top 3 for each contest. Hard. Medium SQL (Intermediate) Max Score: 30 Success Rate: 93. There are 2 questions that are part of this test. sqlPractice / Meesho_HackerRank_SQL_Interview_Question. These concepts introduce more complex features and functionalities of SQL. Please read our cookie policy for more information about how we use cookies. Sample Output. After practicing, you can also take HackerRank’s Skills Certification Test to test your SQL skills. ; HackerRank This repository includes my answers for the SQL practice questions provided by HackerRank. Review Profile. 03%. We use cookies to Figure 2: Constraints provided for a HackerRank problem. New Companies. They offer a wide range of problems that test various Here are ten SQL practice exercises for your beginner SQL skills. Take the HackerRank Certification Test and showcase your knowledge as a HackerRank verified developer. Skill over pedigree. 5 hours long? Because Im solving ALL of the SQL Problems on Hackerrank in this video. Explore the best digital platforms to practice SQL and master your expertise. python3 hackerrank-python hackerrank-solutions SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. There are a total of 58 problems of varying difficulty level that test different concepts. Write a query to find the node type of Binary Tree ordered by the value of the node. hackerrank hackerrank-python hackerrank-solutions hackerrank-sql. This collection serves as a useful resource for improving SQL skills and problem-solving techniques. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Your recruiter may send you a test that has the proctoring feature turned on. Unsolved. You will get 1 point for each correct answer. Blame. Only the permitted languages are displayed in this list. Published on Sample Input. The Test. Easy. 5. Click here to see more codes for NodeMCU ESP8266 and similar Family. Java Code Test. We use cookies to ensure Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Generally on the test platform most of the questions you encounter will not need you to deal with input and output, You can tell your friends about SQL. io is my favorite because the questions are well-designed to focus on the most important concepts. Feel free to use, share, and improve upon it! 🚀 Level up your SQL skills with these HackerRank challenges and become a coding master! 🚀 The SQL online test assesses SQL skills using live coding tasks that require writing CRUD operations in order to extract, combine, and manipulate data. This will help you in skill assessment test . Type of Triangle. sql. They use their knowledge of statistical analysis, data modeling, and data visualization to provide insights The HackerRank Advanced SQL Certification Practice Exams: These exams provide you with an opportunity to practice the skills you need to pass the real exam. Java and SQL practice. Even if the candidate does not know SQL well, they should be able to pick up enough to pass the assessment. 4 mins. We use cookies to 🔥 Learn Basics of SQL with Complete SQL Fundamentals for Beginners. Tweet it Share it. Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. Starts in. Right Menu Left Menu. We use cookies to ensure HackerRank DBMS & SQL Quiz. DBMS & SQL Quiz 1. Click the Tests tab and select the test for which you want to enable proctoring. SQL (Basic) Skills Certification Test. Latest commit History History. Before sending the test invite, you can enable proctoring for a test. It was one coding question and one relatively simple SQL question. 🔥 Learn Basics of SQL with Complete SQL Fundamentals for Beginners. Learn and improve your SQL skills. where LAT_N is the northern latitude and LONG_W is the western Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. In this playlist we are solving every sections of s Our experts have curated these kits with challenges from top companies & mock tests to assess yourself. 📜 License. SELECT DISTINCT CITY FROM STATION WHERE MOD(ID, 2) = 0; IX. Example Task: Install a relational database (e. Reload to refresh your session. It then groups the result by month (using the function in You are given a table, BST, containing two columns: N and P, where N represents the value of a node in Binary Tree, and P is the parent of N. Basic Select. Questions Feel free to choose your preferred programming language from the list of languages supported for each question. Read more. I run a website where you can test and run SQL queries against real, isolated MySQL/Postgres/MariaDB instances. Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Explore my website growthmindset. Through this quiz, you have likely identified areas where you excel and areas where you may need further study and practice. About me: My name is Maria, and I am a data analyst and indie hacker. Prove your Skills. - adminazhar/-hackerrank-SQL-intermediate-skills-certification-test-solution 170+ solutions to Hackerrank. In the code editor, choose the DB language. SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. The first was completed in 2019, administered via AMCAT, and the second was in 2021, via HackerRank. If multiple contestants have the same score in a contest, they are at the same rank. Navigate to the Tests tab and click on Create Test; Scroll down to the end, select Other from the roles drop down and click on Create Test. Practice SQL querys with an online terminal. Advanced Join. 1. Once the test is created you can add the desired skill SQL (Structured Query Language) is a powerful tool used for managing and manipulating relational databases. SQL is a standard language for storing, mani SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. Contact. Whether you’re prepping for an interview or Hackerrank is a great platform to practice SQL queries. Personal. To practice this SQL translation skill can also check out the 60+ question on DataLemur. 74%. Practice coding challenges & prep for interviews. It took me a bit more than two weeks (on and off between work, As a candidate who has received a HackerRank Test Invite, you can access the sample test from the Instructions section of the test Login page. Start → Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Power BI is a cloud-based set of analytic tools and capabilities that expand the utility of Excel for data analytics. I would have definitely brought them on site if they had just missed the single problem. We recommend you to try the sample test for a couple of section. We recommend you to try the sample test for a couple of minutes, before taking the main test. com practice problems using Python 3, С++ and Oracle SQL. Rules. 10 GROUP BY SQL Practice Exercises with Solutions. Run . The HackerRank test we use tests distinct, joins, group by, order by, and basic filtering. At the end of the Quiz, your total score will be displayed. Subdomains. Click Try Sample Test. These problems are divided based on difficulty. Once you pass the certification exam, you will receive an SQL certification from HackerRank, which can be added to your resume to demonstrate your proficiency in SQL. If this video help you a little bit p These questions all test SQL and relational database skills, and are meant to be solved in a collaborative integrated development environment (IDE). Solved queries for the Hackerrank SQL (Intermediate) Skills Certification Test 🎓. Data analysts are responsible for collecting, analyzing, and interpreting large datasets to identify patterns and trends. I've tried several sites to practice SQL and sqlpad. My Solutions to HackerRank Practice Questions on SQL, Python, and Algorithms. We use cookies to ensure This is a sample test to help you get familiar with the HackerRank test environment. The questions are divided into 6 Click here to see solutions for all Machine Learning Coursera Assignments. Advanced Select. Start practicing your skills now and The Test. Then, check how you did by comparing your solution to ours. CodeRankGPT helps you solve HackerRank coding problems during your coding interview. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Students contains two columns: ID and Name. Certification Test. Activities involved: Setting up a database environment and understanding SQL’s purpose and use cases. I have failed every Recruiting SQL You can tell your friends about SQL. HackerRank SQL Practice- Advanced Select. Skills Directory. Specify your email address and Which of the following statements about the wait-die Scheme? It is a Deadlock prevention mechanism; If the older transaction needs some resource locked by a newer transaction then the older transaction will wait. - MayankOps/HackerRank-SQL-Certification-Test-Solutions PL/SQL is an extension of SQL language that combines the data manipulation power of SQL with the processing power of procedural language to create super-powerful SQL queries. You signed in with another tab or window. Go to the Settings tab of the test and click Test Integrity from the Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Show thanks! If Platforms like LeetCode and HackerRank have emerged as industry standards for software engineering and data engineering interview preparation. It also provides a supportive community for learning SQL. We use cookies to ensure you have the Complex joins-This competency includes using INNER, LEFT, RIGHT, and FULL joins on multiple tables and using joins for many-to-many relationships. Verify your SQL Skills. Questions Diversity: The site includes a variety of SQL exercises that Hello coders, in this post you will get all the solution of HackerRank SQL Solutions. Q: What are the next steps after I earn the HackerRank After practicing, you can also take HackerRank’s Skills Certification Test to test your SQL skills. View Schema patients. Prizes. and tables using the field. Key Competencies: Current projects at work require more SQL skills, so I took the time to brush up my SQL knowledge using the HackerRank coding challenges platform. Blog Find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table. It took me a bit more than two weeks (on and off between work, It's all about translating the word problem into SQL, which sounds easy, but the problems are written quite weirdly on HackerRank. For example, for the above constraints, O It may help to try out some CodeSignal GCA practice Why this video is 7. Status. 2 of 6; Choose a language Select the language you wish to use to solve this Spring Boot is an extension of the Spring Framework that helps developers build simple and web-based applications quickly, with less code. It focuses solely on offering correct answers for SQL queries, joins, and aggregations, helping users pass the certification efficiently. Count Your Score. These tests are Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Open main menu. This is the only video you will need to improve you The sample test scared me too, but it went well and I got an email after inviting me to take the video assessment (if anyone has tips on this, please let me know!). Sample Test link. Get certified in SQL intermediate: Once you feel confident in your intermediate SQL skills, take a certification exam like the SQL Intermediate Certification from HackerRank. 0%. Please refrain from discussing strategy during the contest. Websites like HackerRank and LeetCode provide SQL challenges that mimic real-world problems and allow you to practice SQL queries in an interactive environment. We use cookies to ensure The HackerRank test we use tests distinct, joins, group by, order by, and basic filtering. Nerves can peak during the programming test, and even experienced developers might blank 170+ solutions to Hackerrank. dev. This repository contains my solutions to all the HackerRank SQL Practice Questions. This collection provides solutions to the HackerRank SQL Certification Test problems. Solve SQL query questions using a practice database. This 75-minute exam, shaped by feedback from 2,000 corporate partners, aligns closely with the demands of real-world jobs [1]. 15 Days of Learning SQL. We use cookies to ensure you have the best browsing experience on our website. Apache Spark is an open-source software framework built on top of the Hadoop distributed processing framework. The HackerRank Skills Welcome to the HackerRank SQL Solutions repository! 🚀 Dive into a curated collection of SQL queries crafted to tackle a range of challenges. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. Let’s dive into what SQL is, basic skills, career opportunities, and websites where you can practice SQL. hackerrank hackerrank-python hackerrank-solutions hackerrank-sql Updated Dec 24, 2023; Python Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. Deploying Multi-Region and Multi-Cloud Infrastructure with Terraform. They are essential for building more sophisticated and robust queries, managing data relationships, and optimizing query performance. to. Overview. It focuses solely on offering correct answers for SQL queries, joins, and aggregations, helping users Welcome to the ultimate HackerRank SQL Solutions playlist by Data Analyst Explorers! 📊 Whether you're a budding data enthusiast or an experienced analyst, this curated collection is your In this playlist we are solving every sections of s Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. These tests are timed assessments that require you to solve SQL questions within a time limit. You’re going to see this in nearly every OA question and is a huge clue for you. Some of the other sites are all where LAT_N is the northern latitude and LONG_W is the western longitude. The HackerRank Software Engineer Certification tests crucial skills like problem-solving, SQL, and REST APIs – key abilities for junior software and backend developers. This competency area includes understanding . SQL (Basic) Skills Certification Test 30 min. It is very necessary to refer to the complete Previous Year Questions along with the syllabus. 2 of 6; Choose a language Select the language you wish to use to solve this Introduction to SQL. SQL Syntax - 2. Query the following two values from the STATION table: The sum of all values in LAT_N rounded to a scale of 2 decimal places. There is 1 question that is part of this test. 🔥SQL stands for Structured Query Language. Please read our cookie policy for . Solved. SQL Code Test. Currently, the following SQL In this playlist we are solving hackerrank sql problems . Enabling Webcam Access for a Test. NET Core is an open-source cross-platform framework. Take the HackerRank Skills Test. Boost your database skills for SQL Server, assessment tests, and programming exams. NET Classes, facilities for Input and Output, transforming data, and implementing simple REST API Services. 02%. Only slightly off topic but related to spirit of the question, which is to practice and learn SQL. This competency area includes installation of Spark standalone, executing commands on the Spark interactive shell, Reading and writing data using Data Frames, data transformation, and running Spark on the Cloud, among others. You switched accounts on another tab or window. Employers aren't looking for perfect candidate with the perfect answers. Skills. We use cookies to Conclusions. cracking-the-coding-interview algorithm-challenges coding-challenges hackerrank-sql. Problem Analysis - 1. SQL is a standard language for storing, manipulating and retrieving data in 🔥 Learn Basics of SQL with Complete SQL Fundamentals for Beginners. Challenges: 21, Attempts: 1023084, Mock Tests: 0. They use statistical tools and machine learning algorithms to make data-driven decisions and provide recommendations to improve business performance. HackerRank Kits. Start hiring at the pace of innovation! Skip to content. Info; Rules; Scoring; Info. The STATION table is described as follows:. . SQL is a standard language for storing, mani Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Alternative Queries. Proceed. Easy SQL (Advanced) Max Score: 25 Success Rate: 96. SQL Database. HackerRank Technical MCQs involves question from different topics of computer programming such as Data Structures, OOPS, Networking, SQL, etc. Top. Last name. Sample test cases are simple validation scenarios to test your logic, whereas the other test cases may cover corner scenarios around the problem. HackerRank offers certifications for Creating a Custom Test . Hadoop Multiple Choice and hands-on questions, used in the Data Engineering assessments in HackerRank, test knowledge of control flow of a map-side join, MapReduce combiners, and commonly used Hadoop Just had someone submit a Hackerrank test and get a 100%, but I know for certain that they cheated on the final problem. Use Hackerrank for practice problems specifically designed for IBM assessments. It is organized into six folders, each containing my solutions for easy, medium and difficult challenges executed in a MySQL environment. Add a description, image, and links to the hackerrank-practice topic page so that developers can more easily learn about it. Continue. Tbh, I've found it easy, I've given the Hackerrank SQL test for 5-6 different companies. Answer: This query performs a join operation between the . You signed out in another tab or window. Curate this topic Add this topic to your repo Let's walk through this sample challenge and explore the features of the code editor. Draw The Triangle 1. We use cookies to ensure Prepare for your SQL certification test with practice exams, free resources, and expert strategies. 1 Oracle PL/SQL Quiz Questions And Answers! Oracle PL/SQL Quiz: Hardest Practice Test! Database Concepts Exam Quiz: Trivia! SQL Server Quiz Questions And Answers; XI Class MYSql; Academic Quiz On Section 1 Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. I have failed every Recruiting SQL Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 82%. SQL. The CountryCode for America is USA. Basic Join. Proctoring allows the recruiter to monitor your test screen activity and identify potential malpractice. There are two sections in the test, and both are compulsory to attempt for the candidate Case Study; SQL ( covered in three subsections - basic, intermediate, advanced ) Continue W3Schools provides a comprehensive platform for learning SQL through structured exercises, offering a practical way to test and improve SQL skills. g. To participate in a proctored test, your PC must have a fully functional webcam and you must allow HackerRank to access your webcam. 4. Hands-on practice is the Query all columns for all American cities in the CITY table with populations larger than 100000. In summary, I would say HackerRank questions & review SQL queries :) Reply reply More replies. Your score for a problem depends on the number of test cases your submission successfully passes. Some challenges include additional information to help you out. questions. Each assessment folder contains questions, sample test cases, and of course, annotated solutions to each question.