Parallel Wireless Senior QA Engineer Interview Questions and Answers

50 Questions in 1 hour

Pattern and basic programming questions

Q1. Basic Java, SQL, and project-related questions
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Simple String or list releted questions for Arranging a string some conditions wise

Q1. Count number after decimal value What is decorator What is abstraction in python
Ans. 
To count number after decimal value in Python, use string manipulation or math module.
• Use string manipulation to count number of digits after decimal point

• Use math module to round off the number and then subtract the original number to get the digits after decimal point

• Example: num = 3.14159, str_num = str(num), decimal_index = str_num.index('.') + 1, digits_after_decimal = len(str_num) - decimal_index
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Basic aptitude test and was unproctored

Q1. It was a online technical round
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Q1. What is singleton design pattern
Ans. 
Singleton design pattern restricts the instantiation of a class to a single instance and provides global access to it.
• Used when only one instance of a class is required throughout the application

• Provides a global point of access to the instance

• Implemented using a private constructor, static method, and static variable

• Example: Logger class, Database connection class
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Q2. C# LINQ queries for group and sum data from data table
Ans. 
C# LINQ queries for group and sum data from data table
• Use GroupBy() method to group data based on a specific column

• Use Sum() method to calculate the sum of a column

• Use Select() method to select the required columns
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Q3. Solid design principles
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Solid design principles are a set of guidelines for writing maintainable and scalable code.
• Single Responsibility Principle (SRP) - each class should have only one responsibility

• Open/Closed Principle (OCP) - classes should be open for extension but closed for modification

• Liskov Substitution Principle (LSP) - subclasses should be able to replace their parent classes without affecting the program's correctness

• Interface Se...read more
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Q4. OOPS concepts ,like association and all
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MCQ questions on OS, JS and HTML

Basic Questions from resume. String/Array DSA questions

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Q1. Java related questions
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Q2. Based on the resume
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There was a coding round and out of 75 students 28 got selected for next round

Q1. Total on resume and basic coding questions like write code for different sorting algorithms.
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Q2. Explain your project in detail and asking cross questions regarding project.
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Q1. I was rejected in round 2.
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Just plain leetcode medium questions