Light & Wonder Associate Software Quality Assurance Engineer Interview Questions and Answers

Q1. Polymorphism in C++
Ans. 
Polymorphism in C++ allows objects of different classes to be treated as objects of a common superclass.
• Polymorphism is achieved through function overloading and virtual functions.

• Function overloading allows multiple functions with the same name but different parameters.

• Virtual functions are functions in a base class that are overridden in derived classes.

• Example: Animal class with virtual function 'makeSound', Cat and
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Q2. Standard template library in C++
Ans. 
STL in C++ provides reusable algorithms and data structures for efficient programming.
• STL includes containers like vector, list, map, algorithms like sort, find, and iterators.

• Example: vector v = {1, 2, 3}; sort(v.begin(), v.end());

• STL saves time by providing pre-implemented solutions for common programming tasks.
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Q3. Design Patterns in C++
Ans. 
Design patterns in C++ are reusable solutions to common problems in software design.
• Design patterns help in creating flexible, maintainable, and scalable code.

• Examples of design patterns in C++ include Singleton, Factory, Observer, and Strategy.

• Each design pattern has a specific purpose and can be applied in different scenarios.

• Understanding design patterns can improve code quality and efficiency in software developmen
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MCQ based on programming, 2 programming problems

Q1. What is copy constructor ?
Ans. 
Copy constructor is a special constructor that creates a new object by copying an existing object.
• It is used to initialize an object with another object of the same class.

• It takes a reference to an object of the same class as an argument.

• It creates a new object with the same values as the object passed as argument.

• It is automatically called when a new object is created from an existing object.

• Example: MyClass obj1; MyC
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Q2. What is shallow copy and deep copy ?
Ans. 
Shallow copy creates a new object with the same reference as the original, while deep copy creates a new object with a new reference.
• Shallow copy only copies the top-level object, while deep copy copies all nested objects.

• Shallow copy is faster and uses less memory, while deep copy is slower and uses more memory.

• Examples of shallow copy include copying arrays and objects using the spread operator, while examples of dee...read more
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Q3. Implement Merge Sort on an array
Ans. 
Implementation of Merge Sort on an array
• Divide the array into two halves

• Recursively sort the two halves

• Merge the sorted halves

• Time complexity: O(n log n)

• Space complexity: O(n)
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Q4. What are Virtual Functions ?
Ans. 
Virtual functions are functions that can be overridden by derived classes.
• Virtual functions are declared in a base class and can be overridden in derived classes.

• They allow for polymorphism, where a derived class object can be treated as a base class object.

• Virtual functions are called based on the actual object type, not the pointer or reference type.

• They are declared using the virtual keyword in the base class and ca...read more
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Q5. What are you good at in C++ ?
Ans. 
I am good at object-oriented programming, data structures, and algorithms in C++.
• Strong understanding of object-oriented programming principles

• Proficient in implementing data structures and algorithms in C++

• Experience with memory management and pointers

• Familiarity with C++ standard library and STL

• Ability to optimize code for performance and efficiency
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Q1. Why do you want to get this job ?
Ans. 
I am passionate about software development and this job aligns perfectly with my skills and interests.
• I have a strong passion for software development and enjoy solving complex problems.

• This job offers the opportunity to work on cutting-edge technologies and contribute to innovative projects.

• I am excited about the company's mission and values, and believe in the positive impact software can have on society.

• I am eager t...read more
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Q2. How long will you stay in this company ?
Ans. 
I am committed to staying with the company for the long term and contributing to its success.
• I am looking for a stable and challenging work environment.

• I believe in the company's mission and values.

• I am eager to grow and develop my skills within the company.

• I am open to new opportunities and challenges that may arise.

• I am committed to building strong relationships with my colleagues and contributing to a positive work
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Q1. Merge sorted arrays
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Q1. Checking cache using python
Ans. 
Use Python's built-in 'functools' module to check cache for function results.
• Import 'functools' module

• Use 'lru_cache' decorator to cache function results

• Specify 'maxsize' parameter to limit cache size

• Use 'cache_info()' method to get cache statistics
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Q1. C# fundamentals, database
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Q1. Behavioural question
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Q1. Array,linked list,basic dsa
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DSA, linked list, unity movement code,basic unity questions

Q1. Salary expectations and basic info were asked
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