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OOPS is a programming paradigm based on objects and classes. Java doesn't support multi-level inheritance to avoid ambiguity and complexity.
OOPS stands for Object-Oriented Programming System, where programs are organized around objects rather than actions.
Java supports single inheritance, where a class can only inherit from one superclass to avoid the diamond problem.
Multi-level inheritance in Java can lead to ambiguit...
ACID is a set of properties that guarantee reliable database transactions. Multi-threading involves multiple threads executing code concurrently.
ACID stands for Atomicity, Consistency, Isolation, Durability
Atomicity ensures that all operations in a transaction are completed successfully or none at all
Consistency ensures that the database remains in a valid state before and after the transaction
Isolation ensures that tr...
DML is used to manipulate data in a database, while DDL is used to define the structure of the database.
DML stands for Data Manipulation Language and is used for operations like INSERT, UPDATE, DELETE.
DDL stands for Data Definition Language and is used for operations like CREATE, ALTER, DROP.
DML is used to modify existing data in a database, while DDL is used to define the structure of the database.
Examples of DML stat...
DB consistency in multi-threading ensures that data remains accurate and up-to-date across multiple threads.
Use transactions to ensure atomicity and isolation of database operations.
Implement proper locking mechanisms to prevent data corruption in concurrent access.
Consider using optimistic concurrency control techniques to handle conflicts.
Use database triggers or constraints to enforce data integrity rules.
Regularly ...
2 technical Rounds on java each 1 hour
Threads are lightweight processes within a program that can run concurrently, allowing for multitasking and improved performance.
Threads share the same memory space within a process
Threads can communicate with each other through shared memory or message passing
Threads can be used for parallel processing, handling multiple tasks simultaneously
Examples: Java threads, POSIX threads (pthread)
Spring Boot controllers handle incoming HTTP requests and SQL commands are used to interact with databases.
Spring Boot controllers are classes annotated with @RestController that handle incoming HTTP requests
SQL commands are used to interact with databases to perform operations like insert, update, delete, and select
Controllers in Spring Boot can use SQL commands to fetch data from a database and return it as a respons
I applied via Campus Placement and was interviewed before Jul 2021. There were 4 interview rounds.
Aptitude test on CS subjects like C programming, DBMS, CN, and OS.
There were 2 input-output based questions of easy to moderate level
Every candidate was given an individual topic and was asked to speak on it
I applied via Referral and was interviewed before Jan 2021. There was 1 interview round.
I applied via Campus Placement and was interviewed before Feb 2021. There were 3 interview rounds.
Aptitude round consists Logical reasoning, General Aptitude, Grammar related questions etc. All are moderate level questions.
OOPs is a programming paradigm that uses objects to represent real-world entities. Java is an OOPs language.
OOPs stands for Object-Oriented Programming System
Java is a class-based OOPs language
Encapsulation, Inheritance, Polymorphism, and Abstraction are the four pillars of OOPs
Objects have state and behavior
Java supports interfaces, which allow for multiple inheritance
Example: A car can be represented as an object wit...
Java solves machine dependency by using bytecode and virtual machine.
Java code is compiled into bytecode which is platform-independent
The bytecode is executed by the Java Virtual Machine (JVM) which is platform-specific
JVM translates bytecode into machine code for the specific platform
This allows Java code to run on any platform with a JVM installed
Example: A Java program compiled on Windows can run on Linux or Mac as
I applied via Company Website and was interviewed before Jul 2021. There were 3 interview rounds.
Aptitude, reasoning, English, cloud sections
2 questions in which , one has to complete within an 50 minutes
I applied via Campus Placement and was interviewed before May 2021. There were 2 interview rounds.
Numerical ability and logical reasoning followed by some coding mcqs
Printing 1 to 100 without for loop
Use recursion to print numbers from 1 to 99
Print 100 outside the recursion
Use a base case to stop recursion at 100
I applied via Campus Placement and was interviewed before Jun 2021. There were 2 interview rounds.
Simple aptitude test
I applied via Recruitment Consultant and was interviewed before Jul 2020. There was 1 interview round.
I appeared for an interview before Sep 2020.
Round duration - 60 minutes
Round difficulty - Easy
Round duration - 50 minutes
Round difficulty - Easy
Round duration - 60 minutes
Round difficulty - Easy
At the beginning of this round, the interviewer asked me about the data structures I knew. Linked lists, trees, graphs, arrays etc. was my answer. He asked me how well I knew Dynamic Programming. I said I wasn’t strong in that and he said that he would ask me a question on dynamic programming for sure.
Round duration - 40 minutes
Round difficulty - Easy
The interviewer asked me if I was comfortable with the interview process so far and how the previous interviews were. I said it was good and he gave me the first problem to solve.
Round duration - 60 minutes
Round difficulty - Easy
The interviewer asked me some Computer Science fundamentals in this round as well as some behavioural questions.
Implement a Trie data structure with insert and search functions.
Create a TrieNode class with children and isEndOfWord attributes.
Implement insert function to add words by iterating through characters.
Implement search function to check if a word exists by traversing the Trie.
Example: Insert 'apple', 'banana', 'orange' and search for 'apple' and 'grape'.
Do lot of hard work and practice of Data Structures and Algorithms based questions. I personally recommend you Coding Ninjas and Geeks For Geeks for interview preparation.
Application resume tips for other job seekersMake your resume short and try to make it of one page only and do mention all your skills which you are confident of in your resume.
Final outcome of the interviewSelectedbased on 2 interviews
Interview experience
based on 3 reviews
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