3Di Systems Automation Test Analyst Interview Questions and Answers

Q1. What is singleton class
Ans. 
A singleton class is a class that can only have one instance created and provides a global point of access to that instance.
• Singleton classes are often used in scenarios where only one instance of a class is needed, such as for managing a connection pool or configuration settings.

• The singleton pattern typically involves a private constructor, a static method to access the instance, and a static variable to hold the ins...read more
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Easy questions oops,java,rest assured

Java coding , logical questions

Q1. Coding questions again and some automation concept
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Q1. Testing concept and process
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Q1. Sallary discuss
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Basic Python problems

Q1. About Selenium (locators)
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Q2. What are the types of Wait
Ans. 
Types of wait include implicit, explicit, fluent, and thread.sleep
• Implicit wait: Waits for a certain amount of time before throwing a NoSuchElementException

• Explicit wait: Waits for a certain condition to occur before proceeding further

• Fluent wait: Waits for a condition to occur with a defined polling interval

• Thread.sleep: Pauses the execution for a specified amount of time
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Q1. 2 wire 3 wire
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Q2. What is feedback
Ans. 
Feedback is information about reactions to a product, service, or process that is used as a basis for improvement.
• Feedback is essential for continuous improvement in automation engineering.

• It can come from various sources such as customers, stakeholders, or testing results.

• Feedback can be positive, negative, or neutral, and should be analyzed to make informed decisions.

• Examples of feedback in automation engineering inc...read more
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Q3. What is Timer counters
Ans. 
Timer counters are devices used to count the number of events or time intervals in automation systems.
• Timer counters are used to measure time intervals or count events in automation systems.

• They are commonly used in PLCs (Programmable Logic Controllers) to control processes.

• Timer counters can be programmed to trigger actions based on specific time intervals or event counts.

• Examples include using a timer counter to turn...read more
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Q4. What is PLC type
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PLC stands for Programmable Logic Controller, a type of industrial computer used to control manufacturing processes.
• PLCs are used to automate processes in industries such as manufacturing, automotive, and food processing.

• They are programmed using ladder logic or other programming languages to control machinery and equipment.

• PLCs can monitor inputs from sensors and other devices, make decisions based on logic, and contr...read more
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Q5. About past experience
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