Excellon Software Software Testing Lead Interview Questions and Answers for Experienced

Dsa problems dp and tress problem

Q1. Tell me about your self
Ans. 
I am a passionate software engineer with 5 years of experience in developing web applications using various technologies.
• 5 years of experience in software development

• Proficient in developing web applications

• Skilled in using various technologies

• Passionate about software engineering
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Q2. Projects and intership
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The test was in hackerrank platform, it was moderate level.

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
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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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Basic aptitude test and was unproctored

Q1. It was a online technical round
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MCQ questions on OS, JS and HTML

Basic Questions from resume. String/Array DSA questions

It consists of two questions one is easy and another have medium level

Q1. Interview panel consist of 3 persons and asked about OOPS concepts and implementation in C++
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Q2. Asked about use of #define.
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40 question some were output question and many questions on Oops concept.

Q1. Basic concept of pointer, automata, operating systems
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Includes basic aptitude question with additional questions based on coding languages fundamentals.....

Q1. Question were based on oops concepts. My next question was write a code of binary search and explain it and lastly I was asked an aptitude question ...
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Q2. Write a code of binary search and explain it
Ans. 
Binary search is a search algorithm that finds the position of a target value within a sorted array.
• Divide the array into two halves

• Compare the target value with the middle element

• If the target value matches the middle element, return its position

• If the target value is less than the middle element, search the left half of the array

• If the target value is greater than the middle element, search the right half of the arra...read more
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