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I applied via Walk-in and was interviewed in Oct 2024. There were 2 interview rounds.
Some coding questions
Exception propagation in Java is the process of passing an exception from one method to another in the call stack.
Exceptions can be thrown in a method and propagated up the call stack until they are caught and handled.
If an exception is not caught in a method, it will be propagated to the calling method.
This continues until the exception is caught or reaches the top of the call stack.
Example: If a method 'A' calls meth...
JDBC is a Java API for connecting and executing SQL queries on databases. The return type of a statement in JDBC is boolean.
JDBC stands for Java Database Connectivity.
It allows Java programs to interact with databases using SQL queries.
The return type of a statement in JDBC is boolean, indicating whether the query was successfully executed.
I applied via Walk-in and was interviewed in Jul 2024. There were 3 interview rounds.
Strings are immutable in Java to ensure thread safety, security, and optimization.
Immutable strings are thread-safe as they cannot be modified concurrently by multiple threads.
Immutable strings enhance security by preventing malicious code from altering the string content.
String interning is possible due to immutability, allowing for memory optimization.
Examples: String str = "Hello"; str.concat(" World"); // This does
Runnable is a functional interface with a run() method, while Callable is a functional interface with a call() method that can return a result or throw an exception.
Runnable does not return a result or throw a checked exception, while Callable can return a result or throw a checked exception.
Callable is used in scenarios where you need to return a result or handle checked exceptions, while Runnable is used for simple t...
Spring auto configuration automatically configures Spring beans based on classpath and property settings.
Spring scans classpath for certain annotations like @Component, @Service, @Repository, @Controller, etc.
Based on these annotations and property settings, Spring automatically configures beans.
Auto configuration can be customized using @Conditional annotations or configuration classes.
Example: @SpringBootApplication ...
Second level cache in Hibernate is used to cache data at the session factory level to reduce database hits.
Second level cache stores objects across sessions to reduce database calls
Improves performance by reducing database hits
Configurable cache providers like Ehcache, Infinispan can be used
I was responsible for designing and developing Java applications, collaborating with team members, and troubleshooting issues.
Designed and developed Java applications according to project requirements
Collaborated with team members to ensure smooth project execution
Troubleshooted and resolved any issues that arose during development
Transaction management in Spring helps in managing database transactions in a consistent and reliable manner.
Spring provides support for both programmatic and declarative transaction management.
Programmatic transaction management involves handling transactions in code using TransactionTemplate or PlatformTransactionManager.
Declarative transaction management involves using annotations like @Transactional to define trans...
I applied via Naukri.com and was interviewed before Dec 2023. There was 1 interview round.
The return type of the add method depends on the specific implementation and requirements of the program.
Return type can be int, double, void, or any other data type depending on what the method is supposed to do.
For example, an add method for adding two integers may have a return type of int.
If the add method is simply updating a value and not returning anything, the return type may be void.
I have used annotations like @RestController, @Autowired, @RequestMapping, @Service, @Component, @Repository in Spring Boot.
Used @RestController to define RESTful web services.
Used @Autowired to inject dependencies.
Used @RequestMapping to map web requests to specific handler methods.
Used @Service to mark a class as a service component.
Used @Component to mark a class as a Spring component.
Used @Repository to mark a clas
I have worked on various projects including e-commerce websites, financial management systems, and mobile applications.
Developed an e-commerce website using Java Spring framework
Implemented financial management system with Java EE technologies
Created mobile applications using Android Studio and Java
Optimizing queries involves using indexes, limiting result sets, avoiding unnecessary joins, and optimizing database schema.
Use indexes on columns frequently used in WHERE clauses
Limit result sets by using pagination or filtering
Avoid unnecessary joins by denormalizing data or using subqueries
Optimize database schema by reducing redundancy and normalizing data
Thread safety ensures that shared data is accessed and modified by multiple threads in a safe and consistent manner.
Thread safety is important in multi-threaded programming to prevent race conditions and ensure data integrity.
It can be achieved through synchronization mechanisms like locks, mutexes, and atomic operations.
For example, using synchronized keyword in Java to protect critical sections of code from concurren
I applied via Naukri.com and was interviewed in Oct 2023. There were 3 interview rounds.
C-Edge Technologies interview questions for designations
Arrays are a data structure that stores a collection of elements of the same data type in a contiguous memory location.
Arrays have a fixed size determined at the time of declaration.
Elements in an array are accessed using an index starting from 0.
Example: String[] names = new String[5];
Data structures in Java are used to store and organize data efficiently.
Java provides built-in data structures like arrays, lists, sets, maps, queues, and stacks.
Arrays are used to store a fixed-size collection of elements of the same data type.
Lists like ArrayList and LinkedList can dynamically grow and shrink in size.
Sets ensure unique elements and maps store key-value pairs.
Queues follow the FIFO (First In First Out...
Get interview-ready with Top C-Edge Technologies Interview Questions
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I applied via Campus Placement and was interviewed before Jul 2021. There were 2 interview rounds.
I applied via Naukri.com and was interviewed before May 2021. There was 1 interview round.
I was interviewed in Jun 2017.
I applied via Campus Placement and was interviewed before Oct 2020. There was 1 interview round.
Encapsulation is the process of hiding implementation details and providing access to only necessary information.
Encapsulation helps in achieving data abstraction and information hiding.
It allows for better control over data and prevents unauthorized access.
In Java, encapsulation is achieved through the use of access modifiers such as private, public, and protected.
For example, a class may have private variables that c...
A string is a sequence of characters used to represent text in programming.
Strings are often used for storing and manipulating text data.
In Java, strings are represented by the String class.
Strings can be concatenated using the + operator.
Strings are immutable, meaning they cannot be changed once created.
Examples of string literals include "hello world" and "42".
I applied via Naukri.com and was interviewed in Aug 2018. There were 5 interview rounds.
The question is asking about the candidate's knowledge in Core Java, Spring, Hibernate, Spring Boot, SQL, and AngularJS.
Core Java is the foundation of Java programming language.
Spring is a popular framework for building Java applications.
Hibernate is an ORM tool used for mapping Java objects to database tables.
Spring Boot is a framework for building microservices.
SQL is a language used for managing relational databases...
To connect 2 DBs from a Spring Boot application, configure multiple data sources and use JdbcTemplate or EntityManager for each DB.
Configure multiple data sources in the application.properties file
Create separate configuration classes for each data source
Use JdbcTemplate or EntityManager to interact with each DB
Specify the appropriate data source in the repository or service classes
Abstract method implementation is mandatory while default method is optional.
Abstract method has no implementation in the abstract class and must be implemented by the subclass.
Default method has a default implementation in the interface and can be overridden by the implementing class.
Abstract method is used to enforce a contract while default method is used to provide a default behavior.
Example: abstract method - publ...
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