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Aggregation and composition are two types of relationships between objects in object-oriented programming.
Aggregation is a relationship where one object is a container for other objects, but the contained objects can exist independently.
Composition is a relationship where one object is composed of other objects, and the composed objects cannot exist independently.
Aggregation is represented by a 'has-a' relationship, wh...
Executor framework is a Java framework that provides a way to execute tasks asynchronously using a thread pool.
It provides a way to manage threads and execute tasks in a thread pool
It allows for better resource management and improved performance
It supports different types of thread pools such as fixed, cached, and scheduled
Example: Executors.newFixedThreadPool(10) creates a thread pool with 10 threads
Two threads can communicate through shared memory or message passing.
Shared memory: Both threads can access the same memory location to exchange data.
Message passing: One thread sends a message to another thread through a communication channel.
Synchronization primitives like locks, semaphores, and barriers can be used to coordinate access to shared resources.
Examples: POSIX threads, Java threads, Windows threads.
A functional interface is an interface with only one abstract method. It can be implemented using lambda expressions.
Functional interfaces are used in Java 8's functional programming features.
Examples of functional interfaces include Runnable, Comparator, and Callable.
To create your own functional interface, use the @FunctionalInterface annotation.
The interface should have only one abstract method, and can have default...
Java8 introduced several new features including lambda expressions, streams, and default methods.
Lambda expressions allow for functional programming and simplify code.
Streams provide a way to process collections of data in a functional way.
Default methods allow for adding new methods to interfaces without breaking existing implementations.
Other features include the Date and Time API, Nashorn JavaScript engine, and impr...
Stream class methods include read, write, seek, tell, flush, and more.
read() - reads data from the stream
write() - writes data to the stream
seek() - moves the stream position to a specified location
tell() - returns the current position in the stream
flush() - flushes any buffered data to the stream
eof() - returns true if the end of the stream has been reached
good() - returns true if the stream is in a good state
fail() -...
Future is an interface while CompletableFuture is a class that implements Future and provides additional methods.
Future is a basic interface for asynchronous programming in Java
CompletableFuture is a class that implements Future and provides additional methods like thenApply(), thenAccept(), etc.
CompletableFuture can be used to chain multiple asynchronous operations
CompletableFuture can also be used to handle exception...
Transactions in microservices ensure data consistency and integrity.
Use distributed transactions to ensure atomicity across multiple services.
Implement compensating transactions to handle failures and rollbacks.
Use event-driven architecture to maintain consistency between services.
Consider using a Saga pattern to manage long-running transactions.
Avoid two-phase commit as it can lead to performance issues and scalabilit
The @Transactional annotation is used in Spring to manage transactions in a declarative way.
It is used to define the scope of a transaction.
It can be applied at the class or method level.
It supports various attributes like propagation, isolation, timeout, and read-only.
It can be used with different transaction managers like JDBC, Hibernate, JPA, etc.
It rolls back the transaction if an exception is thrown.
It can be used...
HTTP methods are used to specify the type of action to be performed on a resource.
GET - retrieve information from the server
POST - submit data to the server
PUT - update a resource on the server
DELETE - remove a resource from the server
HEAD - retrieve headers from the server
OPTIONS - retrieve the supported HTTP methods for a resource
PATCH - update a resource partially on the server
EnableAutoConfiguration enables auto-configuration of Spring Boot application while ComponentScan scans for Spring components.
EnableAutoConfiguration automatically configures Spring Boot application based on classpath and other settings.
ComponentScan scans for Spring components and registers them as beans.
EnableAutoConfiguration is used in main application class while ComponentScan can be used in any configuration clas...
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posted on 3 May 2024
I applied via Job Portal and was interviewed in Apr 2024. There were 2 interview rounds.
I applied via Campus Placement and was interviewed in Apr 2024. There was 1 interview round.
Via placement got this oppurtunity asked base questions
Coding test on java for factorial all ways
Database qstns
posted on 23 Feb 2024
I applied via Campus Placement and was interviewed in Jan 2024. There were 2 interview rounds.
We have attempt all questions in that test.
They will give some questions based on technical side.
I applied via Walk-in and was interviewed in Mar 2023. There were 3 interview rounds.
GK questions (multiple choice questions)
I applied via Campus Placement and was interviewed in Sep 2023. There were 2 interview rounds.
Basic quant topics and a technical question
GD is about 10 mins and it is pretty easy
I applied via Campus Placement and was interviewed in Sep 2022. There were 2 interview rounds.
Around 20 ppl participated out of which 7 were shortlisted from each batch.just be cofident
I applied via Walk-in and was interviewed in Feb 2022. There were 2 interview rounds.
Solving within the given time limit and understanding the problems are key method to clear this round
Typecasting is converting one data type to another. Malloc and calloc are functions used to allocate memory dynamically.
Typecasting is done using casting operators like (int), (float), etc.
Malloc is used to allocate memory for a single variable while calloc is used to allocate memory for multiple variables.
Malloc and calloc return a void pointer which needs to be typecasted to the appropriate data type.
Example: int x =...
I applied via Referral and was interviewed in Mar 2022. There were 3 interview rounds.
Python is a high-level programming language used for web development, data analysis, artificial intelligence, and automation.
Python is easy to learn and has a simple syntax
Python supports multiple programming paradigms such as object-oriented, functional, and procedural programming
Python has a vast standard library with modules for various tasks such as web development, data analysis, and machine learning
Python is used...
Data structures are ways of organizing and storing data in a computer so that it can be accessed and used efficiently.
Common data structures include arrays, linked lists, stacks, queues, trees, and graphs.
Arrays are used to store a collection of elements of the same data type.
Linked lists are used to store a collection of elements that are not necessarily stored in contiguous memory locations.
Stacks and queues are used...
I applied via Naukri.com
Some of the top questions asked at the Cape Teaching and Leadership Institute Associate Software Engineer interview -
Senior Test Engineer
3
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