Hibernate Quiz ( Beginner ) - All Questions

This beginner-level Hibernate quiz is designed for learners starting with ORM and Java persistence. It covers Hibernate fundamentals such as ORM concepts, configuration, mappings, annotations, Session, SessionFactory, CRUD operations, and basic interview questions.

Question 1: What is Hibernate?

Web framework
ORM framework
Database
JVM tool

Explanation: Hibernate is an Object Relational Mapping (ORM) framework.

Question 2: What does ORM stand for?

Object Relation Model
Object Relational Mapping
Online Resource Manager
Object Runtime Module

Explanation: ORM stands for Object Relational Mapping.

Question 3: Hibernate is mainly used to?

Design UI
Manage databases directly
Map Java objects to database tables
Compile Java code

Explanation: Hibernate maps Java objects to relational tables.

Question 4: Which language is used to write Hibernate queries?

SQL
HQL
PL/SQL
JPQL

Explanation: Hibernate Query Language (HQL) is used in Hibernate.

Question 5: Which file is used for Hibernate configuration?

hibernate.xml
config.xml
hibernate.cfg.xml
persistence.xml

Explanation: hibernate.cfg.xml contains Hibernate configuration.

Question 6: Which interface represents a unit of work in Hibernate?

SessionFactory
Session
Transaction
Configuration

Explanation: Session represents a single unit of work.

Question 7: Which interface is thread-safe in Hibernate?

Session
Transaction
SessionFactory
Query

Explanation: SessionFactory is thread-safe.

Question 8: Which object is used to open a Hibernate Session?

Session
Configuration
SessionFactory
Transaction

Explanation: SessionFactory is used to open Sessions.

Question 9: Which method saves an object permanently?

persist()
save()
update()
delete()

Explanation: save() stores the object in the database.

Question 10: Which method removes an object from the database?

remove()
delete()
drop()
clear()

Explanation: delete() removes a record from the database.

Question 11: Which annotation marks a class as an entity?

@Table
@Entity
@Column
@Id

Explanation: @Entity marks a persistent class.

Question 12: Which annotation is used to define primary key?

@Column
@Entity
@Id
@GeneratedValue

Explanation: @Id defines the primary key.

Question 13: Which annotation auto-generates primary key values?

@Column
@Id
@GeneratedValue
@Sequence

Explanation: @GeneratedValue auto-generates IDs.

Question 14: Which annotation maps a class to a table?

@Entity
@Column
@Table
@JoinColumn

Explanation: @Table maps class to DB table.

Question 15: Which annotation maps a field to a column?

@Entity
@Table
@Column
@JoinColumn

Explanation: @Column maps fields to table columns.

Question 16: Which annotation defines one-to-one relationship?

@OneToOne
@OneToMany
@ManyToOne
@ManyToMany

Explanation: @OneToOne defines one-to-one relationship.

Question 17: Which annotation defines one-to-many relationship?

@OneToOne
@ManyToMany
@ManyToOne
@OneToMany

Explanation: @OneToMany defines one-to-many relationship.

Question 18: Which annotation defines many-to-one relationship?

@ManyToOne
@OneToMany
@OneToOne
@JoinColumn

Explanation: @ManyToOne defines many-to-one relationship.

Question 19: Which annotation is used to join tables?

@JoinColumn
@Column
@Table
@Id

Explanation: @JoinColumn defines join columns.

Question 20: Which cache level is enabled by default?

First-level cache
Second-level cache
Query cache
No cache

Explanation: First-level cache is enabled by default.

Question 21: Which object acts as first-level cache?

Session
SessionFactory
Transaction
Query

Explanation: Session provides first-level caching.

Question 22: Which cache is shared across sessions?

First-level
Second-level
Session cache
Query cache

Explanation: Second-level cache is shared.

Question 23: Which transaction management is commonly used?

JDBC
JTA
Hibernate Transaction
All of the above

Explanation: Hibernate supports multiple transaction types.

Question 24: Which method updates an existing object?

save()
persist()
update()
insert()

Explanation: update() modifies existing records.

Question 25: Which method retrieves an object by primary key?

get()
load()
fetch()
find()

Explanation: get() retrieves object immediately.

Question 26: What is the difference between get() and load()?

No difference
load() returns proxy, get() hits DB immediately
get() is lazy
load() returns null

Explanation: load() uses proxy, get() fetches data immediately.

Question 27: Which fetching strategy loads data immediately?

Lazy
Deferred
Eager
Batch

Explanation: Eager loading fetches data immediately.

Question 28: Which fetching strategy loads data on demand?

Eager
Lazy
Immediate
Direct

Explanation: Lazy loading fetches data when needed.

Question 29: Which annotation controls fetching strategy?

@Fetch
@FetchType
@Column
@Entity

Explanation: FetchType controls fetch strategy.

Question 30: Which state represents an object not associated with Session?

Persistent
Detached
Transient
Removed

Explanation: Transient objects are not associated with Session.

Question 31: Which state represents an object associated with Session?

Detached
Persistent
Transient
Removed

Explanation: Persistent objects are linked to Session.

Question 32: Which state represents an object previously persistent?

Detached
Transient
Removed
Persistent

Explanation: Detached objects were persistent earlier.

Question 33: Which method removes object from Session cache?

remove()
evict()
clear()
flush()

Explanation: evict() removes object from cache.

Question 34: Which method synchronizes Session with database?

sync()
commit()
flush()
clear()

Explanation: flush() synchronizes changes.

Question 35: Which API is Hibernate based on?

JDBC
JPA
Spring
EJB

Explanation: Hibernate internally uses JDBC.

Question 36: Which framework integrates Hibernate easily?

Struts
Spring
JSF
All of the above

Explanation: Hibernate integrates with multiple frameworks.

Question 37: Which query returns all records of an entity?

FROM Entity
SELECT * FROM Entity
FIND Entity
GET Entity

Explanation: FROM Entity is valid HQL.

Question 38: Which Hibernate feature improves performance?

Caching
Lazy loading
Batch processing
All of the above

Explanation: All listed features improve performance.

Question 39: Which object manages database transactions?

Session
Transaction
SessionFactory
Query

Explanation: Transaction manages commit and rollback.

Question 40: Which method permanently deletes data?

remove()
delete()
drop()
truncate()

Explanation: delete() removes data permanently.

Question 41: Which Hibernate feature avoids SQL writing?

HQL
ORM
Annotations
Caching

Explanation: ORM reduces need to write SQL.

Question 42: Which annotation maps many-to-many relationship?

@ManyToMany
@OneToMany
@JoinColumn
@MapKey

Explanation: @ManyToMany maps many-to-many relationship.

Question 43: Which file is optional when using annotations?

hibernate.cfg.xml
mapping.hbm.xml
pom.xml
application.properties

Explanation: XML mapping file is optional with annotations.

Question 44: Which feature makes Hibernate database-independent?

JDBC
Dialect
Session
Transaction

Explanation: Dialect handles DB-specific SQL.

Question 45: Which Hibernate object is heavy-weight?

Session
Query
Transaction
SessionFactory

Explanation: SessionFactory is heavy-weight.

Question 46: What is the main goal of Hibernate?

UI rendering
Object-database mapping
Network handling
Thread management

Explanation: Hibernate maps Java objects to databases.

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Hibernate Quiz ( Beginner )