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CopyOnWriteArrayList creates a new copy of the underlying array whenever an element is added, modified, or removed.
CopyOnWriteArrayList is thread-safe and suitable for scenarios where reads are more frequent than writes.
Adding, modifying, or removing elements in CopyOnWriteArrayList creates a new copy of the underlying array, ensuring thread safety.
Iterators on CopyOnWriteArrayList operate on the original array an...
HashMap in Java is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values based on keys.
HashMap internally uses an array of linked lists to store key-value pairs.
When a key-value pair is added, the key is hashed to find the index in the array where it will be stored.
If multiple keys hash to the same index, a linked list is used to handle collisions.
Retrieving a value involves ...
Given an array A
of size N
, initialized with all zeros, and another array ARR
of M
pairs of integers representing operations. Each operation consists of a range where ea...
Find the maximum element in an array after performing a series of increment operations on specified ranges.
Initialize an array of size N with all zeros
Iterate through the operations and increment elements within specified ranges
Return the maximum element in the array after all operations
Use two threads to print even and odd numbers in increasing order.
Create two threads, one for printing even numbers and one for printing odd numbers.
Use a shared variable to keep track of the current number to be printed.
Synchronize access to the shared variable to ensure correct ordering of numbers.
Use a loop in each thread to print the next number and update the shared variable.
Synchronized Collection is thread-safe but may have performance issues, while Concurrent Collection is optimized for concurrent access.
Synchronized Collection uses synchronized keyword to achieve thread-safety, while Concurrent Collection uses non-blocking algorithms like CAS (Compare and Swap).
Synchronized Collection locks the entire collection during modification, leading to potential performance bottlenecks, wh...
Overriding equals and hashCode methods in Java is important for proper object comparison and hashing.
Equals method is used to compare two objects for equality, while hashCode method is used to generate a unique integer value for an object.
By overriding equals and hashCode methods, we can ensure that objects are compared based on their actual content rather than memory address.
This is crucial for collections like H...
I applied via Company Website and was interviewed in Sep 2024. There was 1 interview round.
Quick sort can be modified to maintain the order of equal elements, known as stable quick sort.
Stable quick sort uses a modified partitioning method to keep equal elements in their original order.
Example: For array ['apple', 'banana', 'apple', 'orange'], stable sort keeps the first 'apple' before the second.
Using a stable sorting algorithm like merge sort can also achieve the same result if quick sort isn't stable.
I applied via Naukri.com and was interviewed in Jan 2024. There was 1 interview round.
Round 1 was an online hackerank coding test + technical MCQs.
It consisted of 5 MCQs + 1 SQL problem + 1 DSA problem based on queue + 1 Graph question + 1 java based question to create a REST API.
I appeared for an interview in Oct 2021.
Round duration - 60 minutes
Round difficulty - Easy
Technical Interview round with questions on DSA and Java.
Given an array A
of size N
, initialized with all zeros, and another array ARR
of M
pairs of integers representing operations. Each operation consists of a range where e...
Find the maximum element in an array after performing a series of increment operations on specified ranges.
Initialize an array of size N with all zeros
Iterate through the operations and increment elements within specified ranges
Return the maximum element in the array after all operations
HashMap in Java is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values based on keys.
HashMap internally uses an array of linked lists to store key-value pairs.
When a key-value pair is added, the key is hashed to find the index in the array where it will be stored.
If multiple keys hash to the same index, a linked list is used to handle collisions.
Retrieving a value involves hashi...
Overriding equals and hashCode methods in Java is important for proper object comparison and hashing.
Equals method is used to compare two objects for equality, while hashCode method is used to generate a unique integer value for an object.
By overriding equals and hashCode methods, we can ensure that objects are compared based on their actual content rather than memory address.
This is crucial for collections like HashMa...
Round duration - 60 minutes
Round difficulty - Medium
Technical Interview round with questions based around Java.
Use two threads to print even and odd numbers in increasing order.
Create two threads, one for printing even numbers and one for printing odd numbers.
Use a shared variable to keep track of the current number to be printed.
Synchronize access to the shared variable to ensure correct ordering of numbers.
Use a loop in each thread to print the next number and update the shared variable.
CopyOnWriteArrayList creates a new copy of the underlying array whenever an element is added, modified, or removed.
CopyOnWriteArrayList is thread-safe and suitable for scenarios where reads are more frequent than writes.
Adding, modifying, or removing elements in CopyOnWriteArrayList creates a new copy of the underlying array, ensuring thread safety.
Iterators on CopyOnWriteArrayList operate on the original array and do ...
Synchronized Collection is thread-safe but may have performance issues, while Concurrent Collection is optimized for concurrent access.
Synchronized Collection uses synchronized keyword to achieve thread-safety, while Concurrent Collection uses non-blocking algorithms like CAS (Compare and Swap).
Synchronized Collection locks the entire collection during modification, leading to potential performance bottlenecks, while C...
Tip 1 : Thread concept is must for Morgan Stanley. So prepare that on priority
Tip 2 : Basic concepts of Oops/collection framework should be clear.
Tip 3 : Array based program will be asked so have some hands-on.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Top trending discussions
I applied via Referral and was interviewed before Nov 2020. There were 3 interview rounds.
A bond is a debt security that represents a loan made by an investor to a borrower.
Bonds are issued by corporations, municipalities, and governments to raise capital.
They have a fixed interest rate and a maturity date when the principal is repaid.
Bonds are generally considered less risky than stocks but offer lower potential returns.
Investors can buy and sell bonds on the secondary market.
Examples of bonds include U.S....
Fund Accounting is a specialized accounting system used by non-profit organizations and government agencies to track and manage funds.
It involves tracking and reporting on the financial activity of specific funds or grants.
It ensures that funds are used for their intended purposes and that financial reports are accurate and transparent.
Examples include tracking donations to a non-profit organization or managing governm...
I appeared for an interview before Sep 2020.
Round duration - 30 minutes
Round difficulty - Easy
It was in the day time. I was asked the programming language of my choice. It was mostly focused on programming fundamentals. I was asked 2 questions based on Data Structures and Algorithms.
A loop in a linked list can be detected using Floyd's Cycle Detection Algorithm.
Use two pointers - slow and fast, where slow moves one step at a time and fast moves two steps at a time.
If there is a loop, the two pointers will eventually meet at some point within the loop.
To detect the start of the loop, reset one pointer to the head and move both pointers one step at a time until they meet again.
Round duration - 30 minutes
Round difficulty - Easy
This round was mostly focused on my resume and projects.
Round duration - 30 minutes
Round difficulty - Easy
It was in the evening. I went to their office in Gurgaon. It was taken by one of the technology director who had a lot of experience.
Do practice a lot of data structures questions as mostly questions in interviews are based on them. Also, do prepare for projects mentioned in your resume and skills which you have mentioned. Coding ninjas has a big hand in making my interview clear as I have taken a course from the coding Ninjas which helped me a lot to make my concepts clear.
Application resume tips for other job seekersKeep it short and crisp. Go through it properly before the interview. Make sure that you haven't put anything in it that can cause you problems during the interview.
Final outcome of the interviewSelectedposted on 20 May 2017
I appeared for an interview in May 2017.
Yes, the string class can be extended in most programming languages.
Inheritance can be used to extend the functionality of the string class.
By creating a new class that inherits from the string class, additional methods and properties can be added.
Extending the string class allows for customization and adding specific functionality to strings.
Example: In Python, the string class can be extended by creating a new class ...
Implicit objects in JSP are predefined objects that are available for use without any declaration or initialization.
Implicit objects in JSP include request, response, session, application, out, config, pageContext, page, exception, and others.
These objects provide access to various aspects of the JSP environment and can be used to perform common tasks.
For example, the request object allows access to HTTP request parame...
A hash map is a data structure that uses a hash function to map keys to values.
Hash map stores key-value pairs
It uses a hash function to compute an index for each key
Collisions can occur when two keys hash to the same index
Hash maps provide fast access to values based on their keys
StringBuffer and StringBuilder are both used to manipulate strings, but StringBuffer is thread-safe while StringBuilder is not.
StringBuffer is synchronized, making it safe for use in multi-threaded environments.
StringBuilder is not synchronized, making it faster but not thread-safe.
StringBuffer is preferred when multiple threads are involved, while StringBuilder is preferred for single-threaded scenarios.
Both classes p...
MVC is a software architectural pattern that separates an application into three main components: Model, View, and Controller.
Model represents the data and business logic of the application.
View is responsible for displaying the user interface.
Controller handles user input, updates the model, and interacts with the view.
MVC promotes separation of concerns and modularity in software development.
Example: In a web applica...
Annotations used in RESTful web services
1. @Path - Specifies the URI path for the resource
2. @GET - Specifies that the method handles HTTP GET requests
3. @POST - Specifies that the method handles HTTP POST requests
4. @PUT - Specifies that the method handles HTTP PUT requests
5. @DELETE - Specifies that the method handles HTTP DELETE requests
6. @PathParam - Binds the value of a URI template parameter to a method paramete...
I applied via Referral
Markets offer dynamic and challenging environments that require constant adaptation and innovation.
Markets provide opportunities for growth and expansion
Competition in markets drives innovation and efficiency
Markets offer diverse career paths and opportunities for personal development
based on 2 interview experiences
Difficulty level
Duration
Associate
3.5k
salaries
| ₹10 L/yr - ₹17 L/yr |
Senior Manager
2.5k
salaries
| ₹26.1 L/yr - ₹47.3 L/yr |
Manager
1.9k
salaries
| ₹17.8 L/yr - ₹32.4 L/yr |
Senior Associate
1.7k
salaries
| ₹12.8 L/yr - ₹22 L/yr |
Vice President
1.4k
salaries
| ₹38.8 L/yr - ₹71.2 L/yr |
JPMorgan Chase & Co.
Goldman Sachs
TCS
Deloitte