Blue Angels Global School Senior Engineer Interview Questions and Answers

Q1. What is oops , explain its concepts
Ans. 
OOPs stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects.
• OOPs concepts include encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation refers to the bundling of data with the methods that operate on that data.

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

• Polymorphism allows objects to be treated as instances of their par...read more
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Q2. What do you know about collections in java explain it
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Collections in Java are classes that represent groups of objects, providing operations for manipulation and iteration.
• Collections framework in Java provides interfaces (e.g. List, Set, Map) and classes (e.g. ArrayList, HashSet, HashMap) for storing and manipulating groups of objects.

• Collections offer methods for adding, removing, and accessing elements in a collection.

• Collections also provide methods for sorting, searc...read more
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Q1. Tell me about yourself
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I am a passionate software engineer with experience in developing web applications using various technologies.
• Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular

• Proficient in backend development with Node.js and databases like MongoDB and MySQL

• Familiar with version control systems like Git and deployment tools like Docker
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Q2. Situation based behaviourial questions
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Medium leetcode question on graph was given by third party interviewer BarRaiser

Q1. Design a distributed system with 10mil users
Ans. 
Design a distributed system to handle 10 million users.
• Use a microservices architecture to break down the system into smaller, manageable components.

• Implement load balancing to distribute user requests across multiple servers.

• Utilize a distributed database to store user data and ensure scalability.

• Implement caching mechanisms to improve performance and reduce database load.

• Use message queues for asynchronous communicat...read more
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Q1. About Single line diagram
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Q2. Transformers installation
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Q3. Dg working principle
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A DG (diesel generator) works on the principle of converting mechanical energy from the diesel engine into electrical energy through an alternator.
• Diesel engine burns fuel to produce mechanical energy

• Mechanical energy is used to rotate the alternator

• Alternator converts mechanical energy into electrical energy
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Q4. Difference between Predective and Preventive Maintenance
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Predictive maintenance uses data and analytics to predict when equipment failure may occur, while preventive maintenance involves regularly scheduled maintenance to prevent breakdowns.
• Predictive maintenance uses data and analytics to predict when equipment failure may occur

• Preventive maintenance involves regularly scheduled maintenance to prevent breakdowns

• Predictive maintenance is more cost-effective as it allows for ...read more
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Q5. Question about Vcb ,Acb and it's working
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Q6. MCC panel installation
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Q7. HT panel installation
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Q1. Previous organisation work
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Q2. Why Apmd and it's reason
Ans. 
APMD stands for Average Power Maximum Demand, it is used to calculate the average power consumption over a specific period of time.
• APMD helps in determining the maximum power demand during a specific time period.

• It is useful for utility companies to plan and manage their power generation and distribution.

• APMD is calculated by taking the average power consumption over a defined time period, usually in kilowatt-hours (kW
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Common Aptitude along with HTML5, CSS

Q1. Mostly questions were on HTML5,CSS and web development related questions.
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Q1. All technical question related to work experience.
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Q1. Question from previous work experience related to company work culture. why i want to join this firm.
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Advanced Java coding

Q1. Entire core Java arrays and strings
Ans. 
Core Java arrays and strings are fundamental data structures used for storing and manipulating data in Java programming.
• Arrays in Java are used to store multiple values of the same data type in a single variable.

• Strings in Java are objects that represent sequences of characters.

• Arrays and strings in Java are both indexed collections, with arrays being mutable and strings being immutable.

• Example: String[] names = {"Alic
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Q2. Java collections and Framework
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Q1. Some coding and framework
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Q2. REST assured and API
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A topic on software tsting was given to us and we are ealiy done so far

Good experience there was the

Q1. Why qspiders and tell somthing special about us
Ans. 
QSpiders is a leading software training institute known for its quality education and placement assistance.
• QSpiders is known for its experienced faculty who provide hands-on training in software development.

• The institute has a strong track record of placing students in top IT companies.

• QSpiders offers a wide range of courses in software development, testing, and other related fields.

• The institute has state-of-the-art f...read more
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Q2. About our company and what is the basic role do un want in the company
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