Customer Analytics Senior Software QA Engineer Interview Questions and Answers for Experienced

Q1. Coding question
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Q2. Asked to make some component in react
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Q1. Javascript questions
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Q2. Normal js questions
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Q1. Questions were up to the mark
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Questions were moderate

Aptitude test was easy level and moderate level.

Coding test was held in the google form which was very easy.

Q1. What is volatile keyword?
Ans. 
The volatile keyword in software engineering is used to indicate that a variable's value can be modified by multiple threads.
• Volatile keyword ensures that the variable's value is always read from and written to the main memory, rather than cached in a thread's local cache.

• It is used to prevent unexpected behavior in multi-threaded environments where multiple threads may access and modify the same variable simultaneousl...read more
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Q2. What is abstract class
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An abstract class is a class that cannot be instantiated and is meant to be subclassed.
• An abstract class can have abstract methods that must be implemented by its subclasses.

• An abstract class can also have non-abstract methods that can be inherited by its subclasses.

• An abstract class provides a common interface for its subclasses.

• An abstract class can have instance variables and constructors.

• An abstract class cannot be...read more
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Q3. Where do you use abstract class
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Abstract classes are used to provide a common interface and partial implementation for related classes.
• Abstract classes are used when you want to create a base class that cannot be instantiated on its own but can be inherited by other classes.

• They are useful when you want to define common methods and properties that multiple related classes should have.

• Abstract classes can have both abstract and non-abstract methods.

• Ab...read more
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Q1. Just focus on sql and leetcode
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Q2. What is joins in sql
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Joins in SQL are used to combine rows from two or more tables based on a related column between them.
• Joins are used to retrieve data from multiple tables based on a related column

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column
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Q3. Reverse the array
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Reverse the array of strings
• Create a new array and iterate through the original array in reverse order, adding each element to the new array

• Use built-in array methods like reverse() or spread operator for a more concise solution

• Ensure to handle edge cases like empty array or array with only one element
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Q1. Core java basic questions
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Pattern building logic building

Q1. Oops and your core programming
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Q1. What is reactjs
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Q2. Whats is difference between angular and react
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Q1. OOPS concepts of Java
Ans. 
OOPS concepts of Java include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: bundling data and methods within a class

• Inheritance: creating new classes from existing ones

• Polymorphism: using a single interface to represent multiple classes

• Abstraction: hiding implementation details and showing only necessary information
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Q1. Salary Expectations , why you are switching
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