Object-oriented model MCQs in DBMS

By: Prof. Dr. Fazal Rehman Shamil | Last updated: September 23, 2024

MCQs on Object-Oriented Model in DBMS

  1. Which of the following is a characteristic of an object-oriented database model?
    • A. Data is organized into tables and rows.
    • B. Data and its behavior are encapsulated as objects.
    • C. Relationships are represented by sets.
    • D. It does not support inheritance.
    • Answer: B. Data and its behavior are encapsulated as objects.
  2. In an object-oriented database, an object is defined as:
    • A. A collection of related tables.
    • B. An instance of a class that contains both data and methods.
    • C. A unique identifier for data retrieval.
    • D. A key used to link tables together.
    • Answer: B. An instance of a class that contains both data and methods.
  3. Which feature of the object-oriented model allows objects to inherit properties and methods from other objects?
    • A. Encapsulation
    • B. Polymorphism
    • C. Inheritance
    • D. Abstraction
    • Answer: C. Inheritance
  4. What does OODBMS stand for?
    • A. Object-Oriented Database Management System
    • B. Object-Oriented Data and Business Management System
    • C. Object-Oriented Distributed Business Management System
    • D. Object-Oriented Design and Build Management System
    • Answer: A. Object-Oriented Database Management System
  5. In the object-oriented model, a class is:
    • A. A collection of tables.
    • B. A blueprint for creating objects.
    • C. A unique identifier for an object.
    • D. A method for accessing data.
    • Answer: B. A blueprint for creating objects.
  6. Which of the following best describes polymorphism in an object-oriented database?
    • A. The ability to define multiple classes.
    • B. The ability to process objects differently based on their data type or class.
    • C. The ability to encapsulate data.
    • D. The ability to inherit properties from multiple classes.
    • Answer: B. The ability to process objects differently based on their data type or class.
  7. What is encapsulation in the context of an object-oriented database?
    • A. The process of inheriting properties.
    • B. The process of bundling data and methods that operate on the data into a single unit.
    • C. The process of defining multiple forms for a single function.
    • D. The process of abstracting data.
    • Answer: B. The process of bundling data and methods that operate on the data into a single unit.
  8. In an object-oriented database, a method is:
    • A. A function or procedure associated with an object.
    • B. A unique identifier for an object.
    • C. A collection of tables and rows.
    • D. A property of a class.
    • Answer: A. A function or procedure associated with an object.
  9. Which of the following is NOT a benefit of an object-oriented database model?
    • A. Reusability of code through inheritance.
    • B. Natural representation of real-world entities.
    • C. Simplicity of data retrieval using SQL.
    • D. Encapsulation of data and behavior.
    • Answer: C. Simplicity of data retrieval using SQL.
  10. Which of the following is an example of an object-oriented database management system?
    • A. MySQL
    • B. PostgreSQL
    • C. db4o
    • D. Microsoft SQL Server
    • Answer: C. db4o
  11. In an object-oriented database, the term “message” refers to:
    • A. Data stored in the database.
    • B. A request for an object to execute one of its methods.
    • C. A unique identifier for a class.
    • D. A table linking different objects.
    • Answer: B. A request for an object to execute one of its methods.
  12. Which concept in the object-oriented model ensures that an object can be represented in multiple forms?
    • A. Encapsulation
    • B. Inheritance
    • C. Polymorphism
    • D. Abstraction
    • Answer: C. Polymorphism
  13. The process of defining an object’s structure and behavior without specifying its implementation is known as:
    • A. Encapsulation
    • B. Inheritance
    • C. Polymorphism
    • D. Abstraction
    • Answer: D. Abstraction
  14. In object-oriented databases, objects that share common properties and methods are grouped into:
    • A. Classes
    • B. Tables
    • C. Records
    • D. Sets
    • Answer: A. Classes
  15. Which of the following is a key challenge in implementing object-oriented databases?
    • A. Lack of support for complex data types.
    • B. Difficulty in modeling real-world entities.
    • C. Integrating with existing relational databases.
    • D. Lack of support for encapsulation.
    • Answer: C. Integrating with existing relational databases.
  16. In an object-oriented database, a “constructor” is:
    • A. A method used to create an object and initialize its state.
    • B. A property that uniquely identifies an object.
    • C. A collection of objects.
    • D. A function to destroy an object.
    • Answer: A. A method used to create an object and initialize its state.
  17. Which of the following features in the object-oriented model allows objects to be reused in different programs?
    • A. Encapsulation
    • B. Inheritance
    • C. Polymorphism
    • D. Abstraction
    • Answer: B. Inheritance
  18. Which term refers to the ability of different classes to respond to the same message in different ways in an object-oriented database?
    • A. Encapsulation
    • B. Inheritance
    • C. Polymorphism
    • D. Abstraction
    • Answer: C. Polymorphism
  19. Which of the following best describes the concept of “object identity” in an object-oriented database?
    • A. Objects have a unique identifier independent of their attribute values.
    • B. Objects are identified based on their attribute values.
    • C. Objects have the same identifier if they have similar attributes.
    • D. Objects cannot have unique identifiers.
    • Answer: A. Objects have a unique identifier independent of their attribute values.
  20. Which of the following is a key advantage of using an object-oriented database?
    • A. Simple data model
    • B. Faster data retrieval
    • C. Better representation of complex data and relationships
    • D. Easier integration with SQL-based systems
    • Answer: C. Better representation of complex data and relationships

 

More MCQs Of Database Systems

  1. Database Models MCQs in DBMS
    1. Hierarchical model MCQs in DBMS
    2. Network model MCQs in DBMS
    3. Relational model MCQs in DBMS
    4. Object-oriented model MCQs in DBMS
    5. NoSQL databases MCQs in DBMS
  2. Relational Database Model MCQs in DBMS
    1. tables, attributes, tuples, and relations MCQs in DBMS
    2. Primary keys and foreign keys MCQs in DBMS
    3. Integrity constraints MCQs in DBMS
  3. SQL (Structured Query Language) MCQs in DBMS
    1. Data Definition Language (DDL) MCQs in DBMS
    2. Data Manipulation Language (DML) MCQs in DBMS
    3. Data Control Language (DCL) MCQs in DBMS
    4. Transaction Control Language (TCL) MCQs in DBMS
    5. Advanced SQL queries and functions MCQs in DBMS
  4. Database Design MCQs in DBMS
    1. Entity-Relationship (ER) modeling MCQs in DBMS
    2. Extended ER modeling MCQs in DBMS
    3. Normalization and normal forms (1NF, 2NF, 3NF, BCNF) MCQs in DBMS
    4. Denormalization MCQs in DBMS
  5. Database Management System Architecture MCQs in DBMS
    1. Three-schema architecture (external, conceptual, internal) MCQs in DBMS
    2. Data independence MCQs in DBMS
    3. DBMS components and functions MCQs in DBMS
  6. Storage and File Structure MCQs in DBMS
    1. Data storage on physical media MCQs in DBMS
    2. File organization and access methods MCQs
    3. Indexing (B-trees, hash indexing) MCQs in DBMS
    4. RAID technology MCQs in DBMS
  7. Query Processing and Optimization MCQs in DBMS
  8. Database Transaction Management MCQs in DBMS
    1. ACID properties (Atomicity, Consistency, Isolation, Durability) MCQs in DBMS
    2. Transaction states and lifecycle MCQs in DBMS
    3. Concurrency control techniques (locking, timestamping, multiversion) MCQs in DBMS
    4. Deadlock detection and resolution MCQs in DBMS
  9. Database Security and Authorization MCQs in DBMS
    1. Authentication and authorization mechanisms MCQs in DBMS
    2. Data encryption techniques MCQs in DBMS
    3. Role-based access control MCQs in DBMS
    4. SQL injection prevention MCQs in DBMS
  10. Backup and Recovery MCQs in DBMS
    1. Backup types and strategies MCQs in DBMS
    2. Recovery techniques (log-based, shadow paging) MCQs in DBMS
    3. Disaster recovery planning MCQs in DBMS
  11. Distributed Databases MCQs in DBMS
    1. Distributed database architecture MCQs MCQs in DBMS
    2. Data fragmentation, replication, and allocation in DBMS
    3. Distributed query processing MCQs in DBMS
    4. Consistency models and protocols MCQs in DBMS
  1. SET 1: database design mcqs (database design mcqs )
  2. SET 2: database mcqs with answers pdf (database mcqs with answers pdf )
  3. SET 3: modern database management 12th edition mcqs (modern database management 12th edition mcqs)
  4. SET 4: database systems mcqs (database systems mcqs)
  5. SET 5: dbms mcqs (dbms mcqs )
  6. SET 6: dbms mcqs with answers (dbms mcqs with answers)
  7. SET 7: solved mcqs of dbms (solved mcqs of dbms)
  8. SET 8: dbms mcqs with answers pdf(dbms mcqs with answers pdf)
  9. SET 9: relational database management system mcqs(relational database management system mcqs)
  10. SET 10: solved mcqs of database management system(solved mcqs of database management system)
  11. SET 11: basic database mcqs pdf (basic database mcqs pdf)
  12. SET 12: relational database management system mcqs (relational database management system mcqs )
  13. SET 13: database mcqs online test (database mcqs online test)
  14. SET 14: database interview questions mcqs (database interview questions mcqs)
  15. SET 15: database developer mcqs (database developer mcqs)
  16. SET 16: database Repeated mcqs (database Repeated mcqs)
  17. SET 17: Database mcqs PPSC (Database mcqs PPSC)
  18. SET 18: Database mcqs FPSC (Database mcqs FPSC)
  19. SET 19: DBMS mcqs FPSC (DBMS mcqs FPSC)

New Arrival

Database interview questions

Related Posts: