Deluxe Entertainment QC Engineer Interview Questions and Answers

According to skills and experience

Q1. One one round with technical person then manager
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Q2. It's upto your resume and skills
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Q1. Salary discussion and final round with general manager
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Create a Movie application on compose using mvvm

Q1. C# abstraction and encapsulation
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Q2. Reflection and indexers in c#
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Reflection and indexers in C#
• Reflection allows inspecting and manipulating metadata of types, objects, and assemblies at runtime

• Indexers provide a way to access elements of a class or struct using array-like syntax

• Reflection can be used to dynamically access and invoke indexers
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Q3. Difference between ienumerable and iqueryable
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IEnumerable is read-only and forward-only while IQueryable is queryable and can be filtered.
• IEnumerable is used for in-memory collections while IQueryable is used for querying databases.

• IQueryable is more efficient for large datasets as it allows for server-side filtering.

• IQueryable extends IEnumerable and adds additional functionality for querying data sources.

• Example: IEnumerable numbers = new List { 1, 2, 3 }; IQuer
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Q4. Difference between rank and dense rank in c#
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Rank assigns unique numbers to each distinct value, while dense rank assigns consecutive numbers to each distinct value.
• Rank and DenseRank are used to assign a unique number to each distinct value in a sorted list.

• Rank assigns a unique number to each distinct value, but leaves gaps for ties.

• DenseRank assigns consecutive numbers to each distinct value, without leaving gaps for ties.

• In C#, Rank and DenseRank are availabl...read more
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Q5. Difference between function and Stored procedure
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Functions return a value while stored procedures do not.
• Functions are used to perform a specific task and return a value to the caller.

• Stored procedures are used to execute a set of statements and do not return a value.

• Functions can be used in SQL statements while stored procedures cannot.

• Functions can be called from within stored procedures.

• Functions can be used in expressions while stored procedures cannot.
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Q6. Difference between clustered and non clustered index
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Clustered index determines the physical order of data in a table, while non-clustered index has a separate structure.
• Clustered index sorts and stores the data rows in the table based on their key values, while non-clustered index has a separate structure that contains the key values and a pointer to the data row.

• A table can have only one clustered index, while it can have multiple non-clustered indexes.

• Clustered index ...read more
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Q7. Difference between execute scalar and execute nonquery
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ExecuteScalar returns single value while ExecuteNonQuery does not return any value.
• ExecuteScalar is used for retrieving a single value from the database, such as a count or sum.

• ExecuteNonQuery is used for executing SQL statements that do not return any value, such as INSERT, UPDATE, DELETE.

• ExecuteScalar returns the first column of the first row of the result set, while ExecuteNonQuery returns the number of rows affecte...read more
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Medium Coding questions

Q1. Find if two words are Isomorphism or not
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Isomorphism of two words is determined by mapping each character of one word to another in a one-to-one correspondence.
• Check if the lengths of the two words are equal.

• Create a mapping of characters from one word to another.

• Ensure that each character from one word maps to a unique character in the other word.

• For example, 'egg' and 'add' are isomorphic as 'e' maps to 'a' and 'g' maps to 'd'.
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Q1. Define your current project
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Q2. Coding problem on DP
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Q1. It is usually problem solving round where leetcode tagged questions are asked but in my case it as generic discussion related to work, technical background etc.
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Q1. Discussions around current system.
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Q2. Everything discussed like release process, how to debug in such scenario
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Q3. Some behavioural questions
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Q1. Design current system
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Designing the current system for a Senior Software Engineer position
• Identify the current system architecture and components

• Analyze the strengths and weaknesses of the current system

• Propose improvements or enhancements based on analysis

• Consider scalability, performance, security, and maintainability in the design
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Q2. Design Video Streaming service like Netflix
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Design a video streaming service similar to Netflix
• Utilize a content delivery network (CDN) for efficient video streaming

• Implement recommendation algorithms based on user preferences and viewing history

• Include a user-friendly interface with personalized profiles and watchlists

• Ensure secure payment processing and user data protection

• Offer offline viewing options for subscribers on mobile devices
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Q1. Find max salary using Java stream api
Ans. 
Using Java stream api to find max salary
• Use stream() method to convert the list of salaries to a stream

• Use mapToInt() method to convert the salaries to IntStream

• Use max() method to find the maximum salary
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Q2. A code was given and need to discussion around its LLD, HLD. It was open ended discussion.
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Questions on dp... longest increasing sequence

Q1. Questions on arrays....
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Q2. Questions on stacks... min stack
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