Clean Harbors Overview
- Norwell, MA
- 10,001+ employees
- Environmental Services
Clean Harbors Interview Questions: The most important part of preparing for an interview is practice. Knowing what job interview questions you might be asked is essential – that way, you can craft your answers well in advance and feel confident in your responses when the pressure is on.
Wouldn’t it be great if you knew precisely what interview questions are asked for the Test Engineer and QA for Manual & Automation Positions? Unfortunately, we can’t read minds, but we’ll give you the next best thing: a list of previously asked Clean Harbors interview questions and answers.
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Clean Harbors Interview Questions
Company Location: Bangalore
Updated Date: 13-12-2021
- What are your roles & responsibilities?
- What is WebDriver? Why its interface?
- What is a hashmap?
- Why does SET collection not allow duplicate methods?
- What is an array list?
- Write a program to find the number of characters in a string.
- What is explicit wait in selenium?
- What is REST? What are the different methods available?
- What is Jenkins?
- How can we create jobs?
- What is the difference between Array and ArrayList?
- What is the collection?
- Difference between QTP and Selenium (advantages and disadvantages).
- How can we achieve parallel execution?
- How to run multiple test methods in the same browser instance without closing it?
- Running tests on different browsers
- What is the difference between Throw and Throws?
- What will happen if an exception is declared in throws and if an exception is encountered?
- What is the difference between try/catch block and throws?
- Explain different waits in Selenium.
- Which wait is better?
- Write the syntax for the implicit wait.
- What does the driver.manage() do?
- Database testing using Selenium. How will you establish a connection using a JDBC driver?
- How do you fire queries while using JDBC?
- What is the difference between Class and Instance variables?
- Concept of Selenium Grid. Multiple nodes and errors.
About Clean Harbors
Clean Harbors is the leading provider of environmental, energy, and industrial services and North America’s largest hazardous waste disposal company. The Company serves a diverse customer base, including many Fortune 500 companies, thousands of smaller private entities, and numerous federal, state, provincial, and local governmental agencies.
The Company provides a broad range of hazardous material management and disposal services, including the collection, packaging, transportation, recycling, treatment, and disposal of hazardous and non-hazardous waste. It also provides various environmental cleanup services on customer sites or other locations on a scheduled or emergency response basis.
The Company provides industrial and specialty services, such as high-pressure and chemical cleaning, pigging and decoking, material processing, and industrial lodging services to refineries, chemical plants, pulp and paper mills, and other industrial facilities. It also provides exploration, surface rentals, solids control, and environmental services to the energy sector, serving oil and gas exploration, production, and power generation.
Safety-Kleen, a subsidiary of Clean Harbors, provides used oil recycling and re-refining, parts washers, and environmental solutions for small-quantity waste generators supported by the world’s largest re-refining capabilities to convert used oil into base and blended lube oils.