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posted on 12 Jun 2024
Implementing a shuffle function for a playlist of songs
Create a new empty playlist
Randomly select a song from the original playlist and add it to the new playlist
Remove the selected song from the original playlist
Repeat until all songs have been added to the new playlist
Return the new shuffled playlist
Memory leak is a situation where a program fails to release memory it no longer needs.
Memory leaks can cause a program to consume more and more memory over time, eventually leading to crashes or other issues.
Memory leaks can be caused by programming errors such as not freeing memory after it is no longer needed.
Tools like valgrind can be used to detect memory leaks in C and C++ programs.
Examples of memory leaks include...
Arrays have fixed size and can lead to memory wastage and performance issues.
Arrays have a fixed size and cannot be resized dynamically.
Inserting or deleting elements in an array can be time-consuming.
Arrays can lead to memory wastage if they are not fully utilized.
Arrays can cause performance issues if they are too large and need to be traversed frequently.
Arrays can also be prone to buffer overflow attacks.
Example: A...
Function to hide text on mouse click in JavaScript
Create a function that takes an element as input
Add an event listener to the element for a mouse click
Toggle the element's display property between 'none' and its original value
Find two elements in an unsorted array whose sum is equal to a given number x.
Use a hash table to store the difference between x and each element in the array.
Iterate through the array and check if the current element is in the hash table.
Return the pair of elements that add up to x.
BST stands for Binary Search Tree, a data structure used for efficient searching and sorting operations.
BST is a tree-like data structure where each node has at most two children.
The left child of a node contains a value less than the parent node, while the right child contains a value greater than the parent node.
BST allows for efficient searching and sorting operations with a time complexity of O(log n).
Examples of a...
Number of possible BSTs with 2 and 3 nodes.
For 2 nodes, only 2 BSTs are possible.
For 3 nodes, 5 BSTs are possible.
Number of BSTs can be calculated using Catalan numbers formula.
Catalan(2) = 2, Catalan(3) = 5.
Answering the question about possible trees with two and three nodes.
For two nodes, there is only one possible tree.
For three nodes, there are three possible trees.
The formula for calculating the number of possible trees with n nodes is (2n-3)!!.
The double exclamation mark represents the double factorial function.
The double factorial function is defined as n!! = n(n-2)(n-4)...(1 or 2).
B+ trees are balanced trees used for indexing and searching large amounts of data.
B+ trees are similar to binary search trees but have multiple keys per node.
They are commonly used in databases and file systems.
B+ trees have a high fanout, reducing the number of disk accesses required for searching.
They are also self-balancing, ensuring efficient performance even with large amounts of data.
Example: In a database, a B+ ...
Yes, I have a few questions.
Can you tell me more about the team I'll be working with?
What is the company culture like?
What are the biggest challenges the team is currently facing?
Can you walk me through the development process for a typical project?
What opportunities are there for professional growth and development?
I prefer hash tables for their constant time lookup and insertion.
Hash tables are efficient for storing and retrieving data.
They have constant time complexity for both insertion and lookup.
They can be implemented using arrays or linked lists.
Examples include Python's dictionary and Java's HashMap.
Yes, we can implement a stack using two queues.
Push operation: Enqueue the element to the first queue.
Pop operation: Dequeue all elements from the first queue and enqueue them to the second queue until the last element. Dequeue and return the last element. Swap the names of the queues.
Top operation: Same as pop operation but don't dequeue the last element.
Example: Push 1, 2, 3. Queue 1: 1 2 3. Queue 2: empty. Pop opera...
Find minimum no of platforms required to avoid collision between trains based on their arrival and departure times.
Sort both arrays in ascending order
Initialize platform count and max count to 1
Loop through both arrays and compare arrival and departure times
If arrival time is less than or equal to departure time, increment platform count
Else, decrement platform count
Update max count if platform count is greater than ma
JVM stands for Java Virtual Machine. It is an abstract machine that provides a runtime environment for Java programs.
JVM is responsible for interpreting the compiled Java code and executing it.
It provides platform independence by converting bytecode into machine-specific code.
JVM has various components like class loader, bytecode verifier, and execution engine.
Compiler converts source code into bytecode, while JVM exec...
I am a software engineer with experience in developing web applications and a passion for learning new technologies.
Experienced in developing web applications using technologies such as Java, Spring, and Angular
Passionate about learning new technologies and keeping up with industry trends
Strong problem-solving skills and ability to work in a team environment
Completed a Bachelor's degree in Computer Science from XYZ Uni
PayTM is an Indian e-commerce payment system and digital wallet company.
PayTM was founded in 2010 by Vijay Shekhar Sharma.
It started as a mobile recharge and bill payment platform.
PayTM has expanded to offer services like online shopping, movie ticket booking, and travel bookings.
It also offers a digital wallet that can be used to pay for various services and products.
PayTM has over 350 million registered users and is ...
I would like to add a feature for splitting bills among friends.
The feature would allow users to split bills for movies, dinners, etc.
Users can select friends from their contact list and split the bill equally or unequally.
The app would send a notification to the selected friends to pay their share.
The feature would make it easier for users to split expenses and avoid awkward conversations.
It would also encourage more
My favourite app is Spotify. I would like to see improvements in the algorithm for personalized playlists.
Improved algorithm for personalized playlists
Better integration with social media platforms
Option to create collaborative playlists with friends
My favourite subject is Computer Science.
I enjoy programming and problem-solving.
I find algorithms and data structures fascinating.
I am interested in artificial intelligence and machine learning.
I like learning about new technologies and keeping up with industry trends.
I choose NIT Hamirpur because of its excellent academic reputation and beautiful campus.
NIT Hamirpur has a strong focus on academics and research, which aligns with my career goals.
The campus is located in a serene and picturesque location, which provides a conducive environment for learning.
The faculty members are highly experienced and knowledgeable, and are always willing to help students.
The college has state-of-th...
Count the number of continuous sequences with equal number of 0's and 1's in an array.
Iterate through the array and keep track of the count of 0's and 1's encountered so far.
Store the difference between the counts in a hash table and increment the count for that difference.
If the difference is already present in the hash table, add the count to the existing value.
Return the sum of all values in the hash table.
Count the number of palindromic substrings in a given string.
A substring is a contiguous sequence of characters within a string.
A palindrome is a string that reads the same backward as forward.
Use dynamic programming to count all palindromic substrings.
Time complexity can be reduced to O(n^2) using Manacher's algorithm.
Find the longest palindrome in a given string in linear time complexity.
Use Manacher's algorithm to find the longest palindrome in a string in O(n) time complexity.
The algorithm involves preprocessing the string to add special characters to handle even and odd length palindromes.
Then, it uses a combination of dynamic programming and symmetry properties to find the longest palindrome.
For example, in the string 'babad',
The value of pie is a mathematical constant approximately equal to 3.14159.
Pie is the ratio of the circumference of a circle to its diameter.
It is an irrational number, meaning it cannot be expressed as a finite decimal or fraction.
Pie is commonly used in geometry and trigonometry calculations.
The value of pie is often approximated as 3.14 or 22/7.
I am a passionate software engineer with experience in developing web applications using various technologies.
Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular
Proficient in backend development with Node.js and databases like MongoDB and MySQL
Familiar with version control systems like Git and deployment tools like Docker
Strong problem-solving skills and ability
Yes, I believe I will be able to fit in the company based on my experience, skills, and values.
I have experience working in diverse teams and adapting to different work cultures.
I share the company's values and vision, which align with my own.
I am eager to learn and contribute to the team, fostering a positive work environment.
I have strong communication skills, which are essential for collaboration and teamwork.
I applied via Referral and was interviewed before Oct 2022. There were 3 interview rounds.
To handle work pressure in difficult scenarios, it is important to prioritize tasks, communicate effectively, take breaks, and seek support when needed.
Prioritize tasks based on urgency and importance
Communicate with team members and supervisors about challenges and seek help if needed
Take short breaks to recharge and refocus
Seek support from colleagues, mentors, or mental health professionals if feeling overwhelmed
Prioritising work involves assessing deadlines, importance, and impact on overall goals.
Identify urgent tasks with tight deadlines
Consider the importance and impact of each task on overall goals
Delegate tasks that can be handled by others
Use tools like to-do lists or project management software to stay organized
Regularly reassess priorities as new tasks arise
Upselling/cross selling involves offering customers additional products or services to increase sales.
Understand customer needs and preferences
Recommend complementary products or services
Highlight the benefits of the additional offerings
Provide personalized recommendations based on customer purchase history
Offer bundle deals or discounts for purchasing multiple items
Train sales staff on effective upselling/cross sellin
I applied via Company Website and was interviewed before May 2022. There were 3 interview rounds.
I have extensive sales experience and a passion for delivering successful projects.
I have worked in sales for over 5 years, consistently exceeding targets and building strong relationships with clients.
I am highly motivated and enjoy the challenge of meeting and exceeding customer expectations.
I have a track record of successfully delivering projects on time and within budget, ensuring customer satisfaction.
I am passio...
I have extensive experience in sales cycle management and have worked in various industries.
I have worked in sales for over 7 years, with experience in both B2B and B2C sales.
I have managed the entire sales cycle, from prospecting to closing deals.
I have experience in industries such as technology, healthcare, and finance.
I have consistently exceeded sales targets and have been recognized for my performance.
I am skille...
Basic DS Question, Medium level difficulty , followed with some puzzles
Designing an in-memory database involves optimizing data storage and retrieval for fast performance.
Use data structures like hash tables or B-trees for efficient indexing and searching
Implement caching mechanisms to reduce disk I/O and improve read/write speeds
Consider data durability and consistency mechanisms to prevent data loss in case of system failures
I applied via Referral and was interviewed in Mar 2024. There were 3 interview rounds.
3 sum problem involves finding 3 numbers in an array that add up to a target sum. Number of operations to make 2 strings same involves finding the minimum number of operations (insert, delete, replace) needed to transform one string into another.
For 3 sum problem, use a hashmap to store complements of each number and check if the complement exists in the hashmap while iterating through the array.
For number of operation...
I have experience working on projects using high-level design (HLD) practices.
Utilized UML diagrams to create HLD for projects
Followed industry best practices for software design
Collaborated with team members to ensure HLD aligns with project goals
I applied via Recruitment Consulltant and was interviewed before Apr 2023. There was 1 interview round.
Types of REST API methods include GET, POST, PUT, DELETE, PATCH, and more.
GET - Retrieve data from a server
POST - Create new data on a server
PUT - Update existing data on a server
DELETE - Remove data from a server
PATCH - Partially update data on a server
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