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posted on 24 Sep 2022
I applied via Naukri.com and was interviewed in Aug 2022. There were 3 interview rounds.
MCQs and coding problems
duration - 1Hr 30min
The object must implement the hashCode() and equals() methods to be used as a key in a hashmap.
hashCode() method is used to generate a unique hash code for the object.
equals() method is used to compare two objects for equality.
Both methods are necessary for proper functioning of hashmap operations like put() and get().
Use stringBuilder for toString() method as it is faster and not thread-safe.
stringBuilder is faster than stringBuffer as it is not thread-safe
toString() method is used for converting an object to a string
If thread-safety is required, use stringBuffer instead
Example: StringBuilder sb = new StringBuilder(); sb.append("Hello"); sb.append("World"); return sb.toString();
Yes, it is a good idea to wrap FileInputStream and FileOutputStream in buffered writers and readers.
Buffered streams improve performance by reducing the number of I/O operations
Buffered streams also provide additional functionality like readLine() and newLine()
Buffered streams can be chained together for even better performance
Example: BufferedReader br = new BufferedReader(new FileReader(file));
I applied via Referral and was interviewed in Apr 2023. There were 4 interview rounds.
Count occurrences of a string in another string and find second highest salary in SQL.
Use a loop to iterate through the second string and check for occurrences of the first string.
Use a counter variable to keep track of the number of occurrences found.
In SQL, use a subquery to find the employee with the second highest salary by ordering the salaries in descending order and selecting the second row.
I applied via Referral and was interviewed in Jun 2023. There were 5 interview rounds.
I applied via Naukri.com and was interviewed in Oct 2024. There was 1 interview round.
I was interviewed before Dec 2020.
Round duration - 60 minutes
Round difficulty - Easy
This was a technical round. The interviewer asked me some programming based questions and some questions on database management systems.
Given an array ARR
of size N
, your objective is to determine the sum of the largest and smallest elements within the array.
Can you achie...
Find the sum of the largest and smallest elements in an array with the least number of comparisons.
Iterate through the array to find the maximum and minimum elements.
Keep track of the maximum and minimum elements as you iterate.
After iterating, sum up the maximum and minimum elements.
To achieve the task with the least number of comparisons, compare elements in pairs.
Construct a binary tree from a given array called parent
where the parent-child relationship is determined by (PARENT[i], i), indicating that the parent of node ...
Construct a binary tree from a given parent array and perform level-order traversal.
Iterate through the parent array to create the binary tree using a queue data structure.
Keep track of the parent-child relationships and construct the tree accordingly.
Perform level-order traversal to print the nodes in the correct order.
Yes, a unique key can also be a primary key.
A primary key must be unique, but a unique key does not necessarily have to be the primary key.
A table can have multiple unique keys, but only one primary key.
Example: In a table of employees, the employee ID can be a unique key and also the primary key.
Normalized form is better for database design for data integrity and flexibility.
Normalized form reduces data redundancy and improves data integrity.
Normalized form allows for easier data updates and maintenance.
Denormalized form may be more efficient for read-heavy applications with complex queries.
Consider denormalization for performance optimization after thorough analysis.
Example: Normalized form for a customer and...
Round duration - 60 minutes
Round difficulty - Medium
The interviewer had good work experience. She was polite and calm. After brief introduction she straight jumped into my current projects and she covered my entire CV.
Round duration - 45 minutes
Round difficulty - Easy
This was a technical round involving questions on OOPS concepts and puzzles.
There are 204 squares on a chessboard.
The chessboard has 64 squares in total.
Each square can be divided into smaller squares, such as 1x1, 2x2, 3x3, etc.
The total number of squares can be calculated by adding the squares of all sizes together.
C++ is a high-level programming language known for its efficiency, flexibility, and performance.
C++ is an object-oriented language with features like classes, inheritance, and polymorphism.
It allows low-level memory manipulation through pointers.
C++ is used in developing system software, game engines, and high-performance applications.
Deep copy creates a new copy of an object with all nested objects also copied, while shallow copy creates a new copy of an object with references to nested objects.
Deep copy creates a new object and recursively copies all nested objects, resulting in a completely independent copy.
Shallow copy creates a new object but only copies references to nested objects, so changes in nested objects will reflect in both the origina...
Template classes are classes that can work with any data type. Assignment operator can be overloaded to behave differently for different data types.
Template classes allow for writing generic classes that can work with any data type.
Overloading the assignment operator allows for custom behavior based on the data type.
Example: template <class T> class MyClass { T data; public: MyClass& operator=(const T& ot...
Round duration - 30 minutes
Round difficulty - Easy
This was a 30 minute HR round. The interviewer asked me a number of questions to know more about me.
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
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.
I applied via Walk-in and was interviewed before Feb 2021. There were 2 interview rounds.
Be good on basics of coding
I was interviewed in Jun 2024.
Java Coding Questions based on ArrayList, HashMap, etc.
Count distinct elements in given String.
Our current project architecture follows a microservices design pattern with separate services for different functionalities.
Microservices architecture with separate services for different functionalities
Use of RESTful APIs for communication between services
Containerization using Docker for easy deployment and scalability
Implementation of service discovery and load balancing with tools like Kubernetes
Use of message bro
My role in the project was to develop and maintain Java applications to meet the project requirements.
Developing Java applications based on project requirements
Maintaining and updating existing Java code
Collaborating with team members to ensure project success
posted on 8 Jan 2025
I applied via Campus Placement and was interviewed in Feb 2023. There were 2 interview rounds.
Round 1 was of aptitude test with two sections overall it was easy but very less time.
based on 1 interview
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