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Singleton class allows only one instance to be created, while static class cannot be instantiated and all members are static.
Singleton class can have instance methods and properties, while static class can only have static members.
Singleton class can be lazy loaded, while static class is eagerly loaded.
Singleton class can be implemented using a static property or method to return the single instance, while static class...
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I applied via Company Website
2 DSA medium questions was asked.
2 DSA coding questions and CS fundamentals
The topic was -> "One nation one election"
String pool in Java is a pool of unique strings stored in memory to optimize memory usage.
String pool is a part of Java's memory where unique string literals are stored.
When a new string is created, Java checks if it already exists in the pool to save memory.
Strings created using double quotes are added to the pool, while those created using 'new' keyword are not.
Example: String str1 = "hello"; String str2 = "hello"; /...
Java has checked and unchecked exceptions. Checked exceptions must be handled at compile time, while unchecked exceptions do not need to be handled explicitly.
Checked exceptions: Must be caught or declared in the method signature. Example: IOException, SQLException
Unchecked exceptions: Do not need to be caught or declared. Example: NullPointerException, ArrayIndexOutOfBoundsException
I applied via Walk-in and was interviewed in May 2024. There was 1 interview round.
LRU cache with multi level caching involves implementing a cache with multiple levels of storage, where the least recently used items are evicted first.
Implement a two-level cache system with a primary cache (e.g. in-memory) and a secondary cache (e.g. disk-based).
Use a data structure like a doubly linked list and a hash map to efficiently manage the cache and track the least recently used items.
When an item is accesse...
I applied via Campus Placement
One medium and one standard DP question
Design Google Pay - a digital wallet platform for online payments and transactions.
Allow users to securely store payment information such as credit/debit cards, bank accounts, and loyalty cards.
Enable users to make payments in stores, online, and within apps using their stored payment methods.
Implement security features like biometric authentication, tokenization, and encryption to protect user data.
Provide features fo...
High Level Design (HLD) of recursive functions in software development.
Recursive functions call themselves to solve smaller instances of the same problem.
HLD of recursive functions involves defining the base case, recursive case, and termination condition.
Example: HLD of a recursive function to calculate factorial of a number involves defining base case as factorial(0) = 1.
posted on 15 Oct 2023
I applied via Referral and was interviewed in Nov 2022. There were 5 interview rounds.
I am a software developer with 5 years of experience. I previously worked at XYZ Company as a full-stack developer.
5 years of experience in software development
Previous role as a full-stack developer at XYZ Company
Proficient in programming languages such as Java, Python, and JavaScript
SQL and coding questions
Basic aptitude , same syllabus that of tcs
Two debugging questions, of medium level
A set of concepts and tools used in React for managing state and rendering UI components.
React hooks are functions that allow you to use state and other React features without writing a class component.
Class based components are a way of defining React components using ES6 classes.
Linked list is a data structure that consists of a sequence of nodes, each containing a reference to the next node.
Palindrome is a word, phr...
I applied via Campus Placement
There is some aptitude questions along with some subject question(C++,DBMS,OS). And also there is one easy/medium coding question
based on 1 interview
Interview experience
based on 1 review
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