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I applied via Campus Placement and was interviewed before Nov 2023. There were 2 interview rounds.
Coding test on hackerrank
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I was interviewed before Mar 2021.
Round duration - 15 minutes
Round difficulty - Easy
This was a group discussion round where we were divided into groups of 10 and we had 15 minutes for GD.
Round duration - 60 minutes
Round difficulty - Medium
This is all about how good you are with the fundamentals. Out of 10 I would give it a 6.5 on difficulty.
You are given a string STR
which contains alphabets, numbers, and special characters. Your task is to reverse the string.
STR = "abcde"
"e...
Reverse a given string containing alphabets, numbers, and special characters.
Iterate through the string from the end to the beginning and append each character to a new string.
Use built-in functions like reverse() or StringBuilder in languages like Python or Java for efficient reversal.
Handle special characters and numbers while reversing the string.
Ensure to consider the constraints on the length of the string and the
A deadlock is a situation in which two or more processes are unable to proceed because each is waiting for the other to release a resource.
Occurs in multitasking environments where processes compete for limited resources
Can be resolved using techniques like deadlock prevention, deadlock avoidance, and deadlock detection
Example: Process A holds Resource X and waits for Resource Y, while Process B holds Resource Y and wa
A thread is a lightweight sub-process that allows concurrent execution within a single process.
Threads share the same memory space within a process.
Threads are used to achieve parallelism and improve performance.
Examples of threads include the main thread in a program and worker threads in a multi-threaded application.
Multiprocessing involves multiple processors executing multiple tasks simultaneously, while multiprogramming involves multiple programs sharing a single processor by switching between them.
Multiprocessing utilizes multiple processors to execute multiple tasks concurrently.
Multiprogramming involves multiple programs sharing a single processor by switching between them.
Multiprocessing is more efficient in terms of perfor...
Process life cycle in an operating system involves creation, execution, termination, and resource management.
Creation: When a process is created, it is assigned a unique process ID and allocated necessary resources.
Execution: The process is then scheduled by the operating system to run on the CPU.
Termination: Once the process completes its task or is terminated by the user, it is removed from memory.
Resource Management...
Windows XP and Windows 7 are both operating systems developed by Microsoft, but they have several key differences.
User interface: Windows 7 has a more modern and user-friendly interface compared to Windows XP.
Performance: Windows 7 is generally faster and more stable than Windows XP.
Security: Windows 7 has more advanced security features and updates compared to Windows XP.
Hardware support: Windows 7 supports newer hard...
Round duration - 60 minutes
Round difficulty - Easy
Technical round with questions on DBMS and Networking mainly.
RDBMS is a type of DBMS that stores data in a structured format with relationships between tables.
RDBMS enforces referential integrity and allows for normalization of data.
DBMS is a general term for any system that manages databases, while RDBMS specifically refers to relational databases.
Examples of RDBMS include MySQL, Oracle, and SQL Server.
Examples of DBMS include MongoDB and Redis.
An Object-Oriented Database Management System (OODBMS) is a type of database management system that supports the creation and management of objects in a database.
OODBMS stores data in the form of objects, which can contain attributes and methods.
It allows for complex data structures and relationships to be represented more easily.
Examples of OODBMS include db4o, ObjectDB, and ObjectStore.
Use the COUNT DISTINCT function in SQL to find the number of unique values in a database.
Use the COUNT DISTINCT function along with the column name to count the number of unique values in that column.
For example, SELECT COUNT(DISTINCT column_name) FROM table_name;
You can also use GROUP BY to find the number of unique values for multiple columns.
A hub operates at the physical layer and broadcasts data to all devices on the network, while a switch operates at the data link layer and forwards data only to the intended recipient.
Hub operates at the physical layer, while switch operates at the data link layer
Hub broadcasts data to all devices on the network, while switch forwards data only to the intended recipient
Switch is more efficient and secure compared to a
The OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven different layers.
Physical Layer: Deals with the physical connection between devices. Example: Ethernet cables.
Data Link Layer: Responsible for node-to-node communication. Example: MAC addresses.
Network Layer: Manages routing of data packets. Example: IP addresses.
T...
Different protocols supported at each OSI layer
Layer 1 (Physical): Ethernet, Wi-Fi, Bluetooth
Layer 2 (Data Link): MAC, PPP, HDLC
Layer 3 (Network): IP, ICMP, ARP
Layer 4 (Transport): TCP, UDP, SCTP
Layer 5 (Session): NetBIOS, PPTP
Layer 6 (Presentation): SSL, TLS
Layer 7 (Application): HTTP, FTP, SMTP
Round duration - 15 minutes
Round difficulty - Easy
IF you make it to the HR round you are selected. All 28 that attended got selected . It was more like stuff for formality. The usual questions.
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 was interviewed before Nov 2020.
Round duration - 60 minutes
Round difficulty - Medium
The test was in the evening which was not too late. It was conducted on Hackerrank which is a very common platform and was hence familiar. There were 26 questions:
Q1: Coding Question
3 languages were allowed: c, java8, python3
Q2 - Q26: Multiple Choice Questions
You are provided with two singly linked lists containing integers, where both lists converge at some node belonging to a third linked list.
Your task is to determine t...
Find the node where two linked lists merge, return -1 if no merging occurs.
Traverse both lists to find the lengths and the last nodes
Align the starting points of both lists by moving the longer list's pointer ahead by the difference in lengths
Traverse both lists simultaneously until a common node is found, which is the merging point
Tip 1 : Practice competitive programming as much as possible. It's never too late. Start now. But it is important to practice before appearing for the paper.
Tip 2 : Try to start making projects early on as it plays a major role during the interviews.
Tip 3 : Be involved in extra curricular activities and events like Hackathons even if you don't win all of them. It gives a lot of exposure and experience.
Tip 4 : Don't lose touch with your core subjects.
Tip 5 : An internship/training from a good organization always helps (though don't lose hope if you don't have it).
Tip 6 : Focus on your communication skills along with your core subjects as it helps in giving a good impression during the interviews.
Tip 1 : Maintain a good CGPA (above 7.5)
Tip 2 : Mention your projects as they are noticed in the interview
Tip 3 : Having an internship experience especially from a good organization helps
Tip 4 : Focus on extra curricular activities too
Tip 5 : Do not put things you are not sure about
I was interviewed before Jan 2021.
Round duration - 70 Minutes
Round difficulty - Medium
This was an Online Coding+MCQ round where we had a total of 50 MCQ questions and 1 coding problem. The coding problem was of easy to medium level but was a bit implementation heavy.
Design a data structure for a Least Recently Used (LRU) cache that supports the following operations:
1. get(key)
- Return the value of the key if it exists in the cache; otherw...
Design a Least Recently Used (LRU) cache data structure that supports get and put operations with capacity constraint.
Implement a doubly linked list to maintain the order of recently used keys.
Use a hashmap to store key-value pairs for quick access.
When capacity is reached, evict the least recently used item before inserting a new item.
Update the position of a key in the linked list whenever it is accessed or updated.
H...
Round duration - 60 Minutes
Round difficulty - Medium
This round had 1 coding question in which I was first required to explain my approach and then discuss the time and space complexities. After this , some basic questions from OOPS and Java were asked.
For a given singly linked list, identify if a loop exists and remove it, adjusting the linked list in place. Return the modified linked list.
A...
Detect and remove loop in a singly linked list in place with O(n) time complexity and O(1) space complexity.
Use Floyd's Cycle Detection Algorithm to identify the loop in the linked list.
Once the loop is detected, use two pointers to find the start of the loop.
Adjust the pointers to remove the loop and return the modified linked list.
ArrayList is implemented using a dynamic array while LinkedList is implemented using a doubly linked list.
ArrayList provides fast random access but slow insertion and deletion operations.
LinkedList provides fast insertion and deletion operations but slow random access.
Example: ArrayList is suitable for scenarios where frequent access and traversal of elements is required, while LinkedList is suitable for scenarios wher...
Abstraction focuses on hiding implementation details, while inheritance allows a class to inherit properties and behavior from another class.
Abstraction is the concept of hiding the complex implementation details and showing only the necessary features of an object.
Inheritance is a mechanism where a new class inherits properties and behavior from an existing class.
Abstraction is achieved through interfaces and abstract...
Round duration - 60 Minutes
Round difficulty - Medium
This round had questions from OS and OOPS. The interviewer also tested my problem solving skills by asking me some puzzles in the end.
Piping in Unix/Linux allows the output of one command to be used as the input for another command.
Piping is done using the | symbol
Multiple commands can be piped together
Piping allows for the creation of complex command chains
Example: ls -l | grep txt
A static variable in C is a variable that retains its value between function calls.
Static variables are declared using the 'static' keyword.
They are initialized only once and retain their value throughout the program's execution.
Static variables have a default value of 0 if not explicitly initialized.
They are stored in the data segment of the program's memory.
Example: static int count = 0; declares a static variable 'c
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 Naukri.com and was interviewed before Jul 2020. There was 1 interview round.
I applied via Recruitment Consultant and was interviewed in Sep 2020. There were 3 interview rounds.
I applied via Recruitment Consulltant and was interviewed in Mar 2024. There was 1 interview round.
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