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I applied via Approached by Company and was interviewed in Aug 2023. There were 3 interview rounds.
It was completely useless, the questions were outdated.
I applied via Naukri.com and was interviewed in Jul 2021. There were 3 interview rounds.
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I applied via Campus Placement and was interviewed in Aug 2023. There was 1 interview round.
I applied via Campus Placement and was interviewed in Aug 2024. There were 4 interview rounds.
Round 1: HackerRank Test (100 Minutes)
1 DSA question (medium level, binary search on answers)
20 technical questions (OS, DBMS, CN, and other CS fundamentals)
15 general aptitude and communication questions
Static binding is resolved at compile time while dynamic binding is resolved at runtime in Java.
Static binding is also known as early binding.
Dynamic binding is also known as late binding.
Example of static binding: method overloading.
Example of dynamic binding: method overriding.
Sorting a linked list involves rearranging the nodes in a specific order.
Iterate through the linked list and compare each node with the next one
Use a sorting algorithm like bubble sort, merge sort, or quick sort to rearrange the nodes
Update the pointers to connect the nodes in the sorted order
JAR files are Java Archive files that store multiple Java class files and related metadata.
JAR files are used to package Java classes, resources, and metadata into a single file.
They are commonly used for distributing Java libraries or applications.
JAR files can be created using the 'jar' command in Java.
They can also be executed using the 'java -jar' command.
Example: mylibrary.jar contains all the class files and reso
A Singleton class is a class that can only have one instance created at a time.
Singleton classes are often used for managing resources that should only have one instance, such as a database connection.
To implement a Singleton class, you typically make the constructor private and provide a static method to access the single instance.
Example: Singleton class for logging system where only one instance of the logger is nee
CAP Theorem states that in a distributed system, it is impossible to simultaneously guarantee consistency, availability, and partition tolerance.
Consistency: All nodes in the system have the same data at the same time.
Availability: Every request gets a response, even if some nodes are down.
Partition Tolerance: The system continues to operate despite network partitions.
Trade-offs: In a distributed system, you can only h...
wait() and signal() are functions used for synchronization in multithreading.
wait() is used to make a thread wait until a certain condition is met
signal() is used to wake up a waiting thread when the condition is met
Example: Producer-consumer problem where producer signals consumer to consume when a new item is produced
Airport Management System schema and ER diagram design
Entities: Airport, Flight, Passenger, Employee, Schedule
Attributes: Airport (code, name, location), Flight (number, destination, departure time), Passenger (name, age, contact info), Employee (ID, name, role), Schedule (flight number, date, time)
Relationships: Airport has many Flights, Flight has many Passengers, Employee works at Airport, Flight has Schedule
Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.
Identify the functional dependencies in the table
Eliminate partial dependencies by breaking the table into multiple tables
Eliminate transitive dependencies by further breaking down the tables
Ensure each table has a primary key and all non-key attributes are fully functionally dependent on the primary key
REST is an architectural style for designing networked applications
REST stands for Representational State Transfer
It uses standard HTTP methods like GET, POST, PUT, DELETE
Resources are identified by URIs
Data is transferred in JSON or XML format
Example: GET request to 'https://api.example.com/users' to retrieve a list of users
PUT is used to update or replace an existing resource, while POST is used to create a new resource.
PUT is idempotent, meaning multiple identical requests will have the same effect as a single request
POST is not idempotent, meaning multiple identical requests may have different effects
PUT is used to update an existing resource at a specific URI
POST is used to create a new resource under a specific URI
Example: PUT /users...
I applied via Campus Placement and was interviewed in Jan 2024. There was 1 interview round.
90 mins, difficulty-moderate , 30 mcq's , 1 SQLquery question, 1 coding question
I applied via Naukri.com and was interviewed in Dec 2020. There were 3 interview rounds.
2 coding ques in 1 hr
The 'this' keyword in Java refers to the current instance of the class.
Used to refer to instance variables or methods of the current object
Can be used to differentiate between instance variables and local variables with the same name
Can be passed as an argument to other methods
final is a keyword used in Java to declare constants, while finally is a block of code used in exception handling to ensure a piece of code is always executed.
final is used to declare constants in Java, its value cannot be changed once assigned
finally is a block of code used in exception handling to ensure a piece of code is always executed, regardless of whether an exception is thrown or not
Example: final int MAX_VALU...
Basic principles of OOP include encapsulation, inheritance, and polymorphism.
Encapsulation: Bundling data and methods that operate on the data into a single unit (class).
Inheritance: Ability of a class to inherit properties and behavior from another class.
Polymorphism: Ability to present the same interface for different data types.
Example: A 'Car' class may have properties like 'color' and 'model', and methods like 'st
I was interviewed before Oct 2023.
Program to remove all spaces from a sentence
Iterate through each character in the sentence
If the character is not a space, add it to a new string
Return the new string without spaces
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