PROMAC Consulting Group Project Engineer Interview Questions and Answers

Q1. Explain OOPs concept in JAVA
Ans. 
OOPs concept in JAVA refers to Object-Oriented Programming principles like encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (object).

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

• Polymorphism: Ability of a method to do different things based on the object it is acting upon.

• Abstraction: Hidin...read more
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Q2. Explain Memory management in JAVA
Ans. 
Memory management in JAVA involves allocation, usage, and deallocation of memory for objects and variables.
• Java uses automatic memory management through garbage collection

• Memory is allocated on the heap for objects and on the stack for local variables

• Java Virtual Machine (JVM) manages memory allocation and deallocation

• Memory leaks can occur if objects are not properly dereferenced
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Q3. Explain Reflection in JAVA
Ans. 
Reflection in Java allows programs to inspect or modify their own structure at runtime.
• Reflection allows access to class information, fields, methods, and constructors at runtime.

• It is commonly used in frameworks like Spring and Hibernate for dependency injection and ORM.

• Example: Using reflection to dynamically load classes or invoke methods based on user input.
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Q1. Self intro about our previous work
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Q1. What is the purpose of the test.startTest() and test.stopTest() methods in programming?
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Good and tricky questions

Q1. Explain oops concepts in java with real time examples?
Ans. 
OOPs concepts in Java are fundamental principles of object-oriented programming, including inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class. Example: Car class inheriting from Vehicle class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Using private variables and public methods in ...read more
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Q2. What java is platform indepenedent?
Ans. 
Java is platform independent because of its 'write once, run anywhere' principle.
• Java programs are compiled into bytecode which can run on any Java Virtual Machine (JVM) regardless of the underlying platform.

• This allows Java programs to be executed on different operating systems without any modifications.

• Examples of platform independent Java applications include web applications, mobile apps, and enterprise software.
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Q3. Difference between abtract and interface key words?
Ans. 
Abstract classes can have both abstract and non-abstract methods, while interfaces can only have abstract methods.
• Abstract classes can have constructors, fields, and non-abstract methods, while interfaces cannot.

• A class can only extend one abstract class, but it can implement multiple interfaces.

• Abstract classes are used to define common characteristics of subclasses, while interfaces are used to define contracts for c...read more
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Q1. Why do you think you fit for this role in this company?
Ans. 
I have a strong background in project management and engineering, with a proven track record of successfully leading and completing projects.
• Extensive experience in project management and engineering

• Proven track record of successfully leading and completing projects

• Strong problem-solving and analytical skills

• Excellent communication and teamwork abilities
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Q2. What is your dream role for any company?
Ans. 
My dream role for any company is to lead a team of innovative engineers in developing cutting-edge technology that positively impacts society.
• Leading a team of engineers in developing innovative solutions

• Working on projects that have a positive impact on society

• Collaborating with cross-functional teams to achieve goals

• Continuous learning and growth opportunities

• Contributing to the company's success and growth
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Q1. What is Active directory
Ans. 
Active Directory is a directory service developed by Microsoft for Windows domain networks.
• Centralized database for managing network resources

• Stores information about users, computers, and other network objects

• Allows for authentication and authorization of users

• Enables single sign-on for users across multiple applications

• Supports group policies for managing security and access control
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Q2. What us office 365
Ans. 
Office 365 is a cloud-based subscription service offered by Microsoft that includes access to various productivity tools and applications.
• Includes applications like Word, Excel, PowerPoint, Outlook, and OneNote

• Provides cloud storage through OneDrive

• Offers collaboration tools like Teams and SharePoint

• Allows access to the latest versions of the software

• Subscription-based service with different plans available
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General coding, basic mathematics.

Q1. What is Object-Oriented Programming (OOP)
Ans. 
OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
• OOP focuses on creating objects that interact with each other to solve problems.

• Encapsulation, inheritance, and polymorphism are key principles of OOP.

• Examples of OOP languages include Java, C++, and Python.
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Q2. What is inheritance?
Ans. 
Inheritance is a concept in object-oriented programming where a class can inherit attributes and methods from another class.
• Allows a class to reuse code from another class

• Promotes code reusability and reduces redundancy

• Creates a parent-child relationship between classes

• Derived class inherits properties and behaviors of the base class

• Example: Class 'Car' can inherit from class 'Vehicle' to reuse common vehicle attribute
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Basic coding questions are asked in the test

Q1. Basic coding pseudo codes
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Q2. Basic code questions and oops
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Work and Time, Percentages

Q1. Difference between set and tuple
Ans. 
Set is an unordered collection of unique elements, while tuple is an ordered collection of elements that can be of different data types.
• Set does not allow duplicate elements

• Tuple elements are accessed using index

• Example of set: {1, 2, 3}

• Example of tuple: (1, 'apple', True)
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Q2. Built in functions of string
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Built-in functions of string are pre-defined functions in programming languages that can be used to manipulate strings.
• Some common built-in functions of string include: length(), substring(), toUpperCase(), toLowerCase(), trim(), indexOf(), charAt().

• Example: str.length() returns the length of the string 'str'.

• Example: str.substring(2, 5) returns the substring of 'str' starting from index 2 to 5.

• Example: str.toUpperCase...read more
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