Quinbay Sdet Automation Test Engineer Interview Questions and Answers

Q1. What is an abstract class?
Ans. 
An abstract class is a class that cannot be instantiated and may contain abstract methods that must be implemented by its subclasses.
• Cannot be instantiated directly

• May contain abstract methods

• Used as a blueprint for other classes
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Q2. What is abstraction?
Ans. 
Abstraction is the process of hiding complex details and showing only the essential features of an object or system.
• Abstraction allows us to focus on what an object does, rather than how it does it

• It helps in simplifying complex systems by breaking them down into smaller, more manageable parts

• Examples of abstraction include using a car without needing to understand its internal combustion engine, or using a smartphone
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Q3. Best sorting algo?time complexity of it?
Ans. 
QuickSort is one of the best sorting algorithms with an average time complexity of O(n log n).
• QuickSort is a divide and conquer algorithm that works by selecting a 'pivot' element and partitioning the array around the pivot.

• It has an average time complexity of O(n log n) and a worst-case time complexity of O(n^2).

• Example: ['apple', 'banana', 'cherry', 'date', 'fig'] can be sorted using QuickSort.

• Example: ['3', '1', '4'...read more
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Q4. You have been provided a sorted list time complexity achieved after we apply bubble sorting
Ans. 
Bubble sorting has a time complexity of O(n^2) for a sorted list.
• Bubble sorting has a worst-case time complexity of O(n^2) for a sorted list.

• The time complexity does not change even if the list is already sorted.

• Example: If we have a sorted list of size n, bubble sorting will still take O(n^2) time.
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Q1. Have you ever been to a state other than jharkhand?
Ans. 
Yes, I have been to multiple states other than Jharkhand.
• I have traveled to states like Maharashtra, Karnataka, and Tamil Nadu for work and leisure.

• I have visited tourist destinations in states like Rajasthan, Kerala, and Himachal Pradesh.

• I have family in states like Uttar Pradesh, Bihar, and West Bengal, which I have visited multiple times.
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Mostly sql based questions

It was modrate easy with compare to other

Good questions which is some are modrate and some difficult

They have 20 ques in round 1
15- java ques{mcq,find o/p]
1-testNg
1-sql
2-selenium

3 questions in Round 2
1- java ques
1-Selenium
1-Manual testing (Test cases)

Simple coding in any programming language

Q1. Technical question and written test
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Q1. Manager round for core concepts
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Q1. Salary discussion made
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It was basic dsa questions on hashmap and heap

Online aptitude test with reasoning and java

Q1. Explain all Oops concepts briefly
Ans. 
Oops concepts are fundamental principles of object-oriented programming like inheritance, polymorphism, encapsulation, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Polymorphism: Ability of objects to take on multiple forms based on the context.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Abstraction: Hiding the complex implemen...read more
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Q2. One basic level java question
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