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I applied via Naukri.com and was interviewed in Nov 2023. There was 1 interview round.
I was interviewed before Jan 2024.
JVM, JRE, and JDK are essential components of Java development, with JVM executing Java programs, JRE providing libraries and tools, and JDK including JRE along with development tools.
JVM (Java Virtual Machine) is responsible for executing Java programs by converting bytecode into machine code.
JRE (Java Runtime Environment) includes JVM, libraries, and other necessary components to run Java applications.
JDK (Java Devel...
The Object class is the root class for all Java classes and provides common methods for all objects.
The Object class is located in the java.lang package.
It provides methods such as equals(), hashCode(), and toString() which can be overridden in subclasses.
All classes in Java are directly or indirectly derived from the Object class.
Example: String class in Java extends the Object class.
Java 8 introduced several new features including lambda expressions, streams, functional interfaces, and default methods.
Lambda expressions allow you to write code in a more concise and readable way.
Streams provide a way to work with sequences of elements and perform operations like filter, map, reduce, etc.
Functional interfaces are interfaces with a single abstract method, which can be implemented using lambda express...
Exception handling in Java is a mechanism to handle runtime errors and prevent program crashes.
Exceptions are objects that represent errors or unexpected events in a program.
Java provides try-catch blocks to handle exceptions and prevent program termination.
Common exceptions in Java include NullPointerException, ArrayIndexOutOfBoundsException, and IOException.
Developers can create custom exceptions by extending the Exc...
No, multiple try blocks are needed for handling different exceptions.
Multiple try blocks are needed to handle different types of exceptions separately.
Each try block can have its own catch block to handle specific exceptions.
Using a single try block for all exceptions can lead to confusion and improper handling.
String pool is a storage area in memory where strings are stored to optimize memory usage by reusing common string literals.
String pool is a part of the Java heap memory where unique string literals are stored.
Strings in the pool are shared among multiple variables to save memory.
When a new string is created, Java first checks if it already exists in the pool before creating a new instance.
Example: String str1 = "hello...
A hash map is a data structure that stores key-value pairs and uses a hash function to map keys to their corresponding values.
Hash map uses a hash function to calculate the index of the key in the underlying array.
Collisions can occur when multiple keys hash to the same index, which is resolved using techniques like chaining or open addressing.
Retrieving a value from a hash map is done by hashing the key to find its in...
HashMap is a key-value pair collection while HashSet is a collection of unique elements.
HashMap allows duplicate values but keys must be unique.
HashSet does not allow duplicate elements.
HashMap uses key-value pairs for storing data, while HashSet only stores individual elements.
Example: HashMap<String, Integer> map = new HashMap<>(); HashSet<String> set = new HashSet<>();
Java uses automatic memory management through garbage collection to allocate and deallocate memory for objects.
Java uses garbage collection to automatically manage memory by deallocating memory for objects that are no longer in use.
Memory is divided into two main areas: stack memory for method calls and local variables, and heap memory for objects.
Objects are created on the heap memory using the 'new' keyword, and memo...
A thread is invoked by calling its start() method.
A thread is invoked by calling the start() method on an instance of the Thread class.
The start() method creates a new thread and invokes the run() method of the thread.
Threads can also be invoked by implementing the Runnable interface and passing it to a Thread constructor.
Threads can be utilized within a class by extending the Thread class or implementing the Runnable interface.
Create a class that extends Thread or implements Runnable interface
Override the run() method to define the task to be executed in a separate thread
Instantiate the class and start the thread using start() method
String is immutable, StringBuffer is synchronized, StringBuilder is not synchronized.
Use String when the value will not change frequently.
Use StringBuffer when multiple threads will be modifying the same String.
Use StringBuilder when single-threaded and frequent modifications are needed.
Query to fetch data of employees with salary greater than 50,000
Use SELECT statement to retrieve data
Add WHERE clause with salary condition
Example: SELECT * FROM employees WHERE salary > 50000;
JOIN in SQL is used to combine rows from two or more tables based on a related column between them.
JOIN is used to retrieve data from multiple tables based on a related column
Types of JOIN include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN
Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column
I am looking for a competitive salary based on my experience and skills.
Research average salaries for Java Developers in the area
Consider your years of experience and level of expertise
Be prepared to negotiate based on benefits and perks offered
Yes, I am comfortable committing to a two-year bond.
I understand the importance of commitment in a professional setting.
I am confident in my skills and believe that I can contribute positively to the company for at least two years.
I have carefully considered the implications of a two-year bond and am willing to fulfill it.
Yes, I am prepared to work in the office on a daily basis.
I am comfortable with working in an office environment
I understand the importance of collaboration and communication in an office setting
I am ready to commute to the office daily if required
I applied via Walk-in and was interviewed before Dec 2023. There was 1 interview round.
Aurus interview questions for popular designations
I was interviewed before Dec 2023.
Get interview-ready with Top Aurus Interview Questions
I was interviewed before Jan 2024.
Data structures in Java are used to store and organize data efficiently.
Data structures like arrays, linked lists, stacks, queues, trees, and graphs are commonly used in Java programming.
Arrays are used to store a fixed-size collection of elements of the same data type.
Linked lists consist of nodes where each node contains a data field and a reference to the next node.
Stacks follow the Last In First Out (LIFO) principl...
I applied via Referral and was interviewed before Aug 2023. There were 3 interview rounds.
General basic knowledge
My 12th % is 85%
My 12th percentage is 85%
I scored 85% in my 12th grade exams
My 12th grade percentage is 85%
I was interviewed before Apr 2023.
Data structures program
I applied via Naukri.com and was interviewed before Apr 2022. There were 2 interview rounds.
TP payment process involves multiple steps and stakeholders.
TP receives payment from the client
TP deducts its commission and sends the remaining amount to the service provider
TP maintains a record of all transactions and generates invoices for clients and service providers
TP ensures timely payment to service providers to maintain good relationships
TP may use different payment methods such as bank transfers, PayPal, or
TP payment flow involves multiple steps including payment authorization, processing, and settlement.
The payment process starts with the authorization of payment by the customer.
The payment information is then processed by the payment gateway.
The payment gateway sends the information to the acquiring bank for settlement.
The acquiring bank settles the payment with the issuing bank.
Finally, the issuing bank credits the pa
I applied via Walk-in and was interviewed before Feb 2023. There was 1 interview round.
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