BlueBinaries Engineering and Solutions Senior Engineer Interview Questions and Answers

Q1. Backend Questions regarding
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Q2. UI Questions regarding Angular
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The interview started from Java coding round, and questions was from basic Java program and collections.

Q1. 1) OOP Concepts
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Q2. Difference between Abstract class and interface
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Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have constructors, fields, and methods, while interface cannot have any of these.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Abstract classes are used to provide a common base for multiple classes, while interfaces are used to define a contract for ...read more
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Q3. Mysql Concepts and Mysql queries
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Q4. Logical questions on Array and String Functions in PHP
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Q5. File handling functions such as fread, fopen, fclose etc and logical string function questions on file data.
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Q1. All Scenario based questions
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Q2. OOP Concepts in deep
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OOP Concepts refer to the principles of Object-Oriented Programming, including encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (object).

• Inheritance: Allowing a class to inherit properties and behavior from another class.

• Polymorphism: The ability for objects of different classes to respond to the same message in different ways...read more
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Q3. Software design pattern related questions
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Q4. Small Logical programs
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Q5. Database queries in deep
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Database queries involve retrieving, updating, and manipulating data stored in a database.
• Database queries are used to retrieve specific data from a database based on certain criteria.

• Queries can also be used to update existing data or insert new data into the database.

• SQL (Structured Query Language) is commonly used to write database queries.

• Examples of database queries include SELECT, INSERT, UPDATE, and DELETE state
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Q1. Reverse link list
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Q2. Count number of digits
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Count the number of digits in a given string
• Iterate through each character in the string

• Check if the character is a digit using isdigit() function

• Increment a counter if the character is a digit

• Return the final count of digits
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Q1. What is Apache Kafka?
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Apache Kafka is a distributed streaming platform used for building real-time data pipelines and streaming applications.
• Apache Kafka is designed to handle high-throughput, fault-tolerant, and scalable real-time data streams.

• It allows for the publishing and subscribing to streams of records, similar to a message queue.

• Kafka is often used for log aggregation, stream processing, event sourcing, and real-time analytics.

• It p...read more
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Q1. How do you manage stress?
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It started with basic introduction, than move ahead with Java, Spring boot question in the end, he asked one leetcode medium question based on DP . Ques : Find a minimum number of jumps required to reach the end of the array, and each index , it can jump arr[index] time at max, you need to calculate minimum number of steps required to reach at the end.

Hacker rank coding tesr

Q1. Relational database queries
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Q2. Coding Question on JavaScript
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Q1. What is dependency injection
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Dependency injection is a design pattern that allows objects to be injected with their dependencies rather than creating them internally.
• Dependency injection helps to decouple the code and improve testability and maintainability.

• It promotes loose coupling by allowing objects to depend on abstractions instead of concrete implementations.

• There are three common types of dependency injection: constructor injection, setter ...read more
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Q2. What is store procedure
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A stored procedure is a precompiled set of SQL statements that can be executed on a database server.
• Stored procedures are used to encapsulate and execute complex database operations.

• They can be written in various programming languages like SQL, PL/SQL, T-SQL, etc.

• Stored procedures can accept input parameters and return output values.

• They can be used to improve performance by reducing network traffic and optimizing quer...read more
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It will be a scenario based implementation