i
Hitachi Digital Services
Filter interviews by
Clear (1)
Cloud, sql, c++, java, os, networking questions followed by 3 coding questions.
I applied via Naukri.com and was interviewed in Sep 2022. There were 5 interview rounds.
Aptitude stocks and share concepts and formulas for beginners and professionals.
Coding test are typically programming challenges that helps technical recruiters programming skills and competencies of a developer
I applied via Naukri.com and was interviewed in May 2022. There were 3 interview rounds.
2 coding questions and 70 mcqs on cse subjects like java, c, python, bigdata, oops, html, sql
Top trending discussions
I applied via Naukri.com and was interviewed in Jan 2021. There were 3 interview rounds.
C# concepts including abstraction, interface, abstract method, abstract class, polymorphism, encapsulation, inheritance, and serialization.
Abstraction: hiding implementation details
Interface: defining a contract for behavior
Abstract method: method without implementation
Abstract class: class with one or more abstract methods
Polymorphism: ability of objects to take on multiple forms
Encapsulation: bundling data and behavi...
posted on 7 Feb 2022
I was interviewed before Feb 2021.
Round duration - 70 Minutes
Round difficulty - Medium
This round had 40 MCQ's followed by 2 questions of DS and Algo. The programming questions were preety standard and can be solved within 30 minutes.
Given an array arr
of length N
consisting of integers, find the sum of the subarray (including empty subarray) with the maximum sum among all subarrays.
Find the sum of the subarray with the maximum sum among all subarrays in a given array.
Iterate through the array and keep track of the maximum sum subarray seen so far.
Use Kadane's algorithm to efficiently find the maximum subarray sum.
Handle cases where all elements are negative or array is empty.
Example: For input arr = [-2, 1, -3, 4, -1], the maximum subarray sum is 4.
Given a string str
and a character 'X', develop a function to eliminate all instances of 'X' from str
and return the resulting string.
The first lin...
Develop a function to remove all instances of a given character from a string.
Iterate through the string character by character and only add characters that are not equal to the given character to a new string.
Alternatively, use built-in string manipulation functions to remove all instances of the given character from the string.
Ensure the function handles edge cases such as empty strings or strings with no instances o...
Round duration - 60 Minutes
Round difficulty - Medium
This round had questions from DSA, OS, DBMS and Computer Networks. The programming question was quiet easy and I coded it preety fast after discussing the appropriate approach and complexity analysis.
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 their lengths and the difference in lengths
Move the pointer of the longer list by the difference in lengths
Traverse both lists simultaneously until they meet at the merging point
Multitasking involves executing multiple tasks simultaneously, while multiprogramming involves running multiple programs on a single processor.
Multitasking allows multiple tasks to run concurrently on a single processor, switching between them quickly.
Multiprogramming involves loading multiple programs into memory and executing them concurrently, utilizing idle CPU time efficiently.
Examples of multitasking include runn...
A process is an executing instance of a program, while a program is a set of instructions stored in the computer's memory.
A program is a static set of instructions stored on disk, while a process is a dynamic instance of those instructions being executed in memory.
Multiple processes can be running the same program simultaneously, each with its own memory space and resources.
Processes have their own unique process ID (P...
A process is an instance of a program, while a thread is a unit of execution within a process.
A process has its own memory space, while threads share the same memory space.
Processes are independent and isolated, while threads can communicate and share resources.
Creating a new process is more resource-intensive than creating a new thread.
Processes have their own program counter, while threads share the same program coun...
UNION combines and removes duplicate rows, UNION ALL combines without removing duplicates.
UNION combines the result sets of two or more SELECT statements into a single result set
UNION removes duplicate rows from the result set
UNION ALL combines the result sets without removing duplicates
UNION is slower than UNION ALL as it requires additional processing to remove duplicates
Use UNION when you want to combine and remove ...
Views provide a virtual representation of data, offering advantages such as simplifying complex queries, enhancing security, and improving performance.
Views simplify complex queries by predefining commonly used joins, filters, and aggregations.
Views enhance security by allowing users to access only specific columns or rows of a table.
Views improve performance by storing the results of complex queries, reducing the need...
ARP stands for Address Resolution Protocol, used to map IP addresses to MAC addresses in a local network.
ARP is used to find the MAC address of a device based on its IP address
It operates at the data link layer of the OSI model
ARP requests are broadcasted to all devices on the local network
Example: When a device wants to communicate with another device on the same network, it uses ARP to find the MAC address of the des
Round duration - 30 Minutes
Round difficulty - Easy
This is a cultural fitment testing round. HR was very frank and asked standard questions. Then we discussed about my role.
I should be hired because of my strong technical skills, problem-solving abilities, and passion for software development.
I have a solid understanding of data structures and algorithms.
I have experience in developing and debugging complex software systems.
I am a quick learner and can adapt to new technologies and programming languages.
I have a track record of delivering high-quality code on time.
I am a team player and 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 was interviewed before Mar 2021.
Round duration - 60 minutes
Round difficulty - Easy
Technical Interview round with questions based on DSA, OOPS and puzzles.
Given a Singly Linked List of integers, your task is to reverse the Linked List by altering the links between the nodes.
The first line of input is an intege...
Reverse a singly linked list by altering the links between nodes.
Iterate through the linked list and reverse the links between nodes
Use three pointers to keep track of the current, previous, and next nodes
Update the links between nodes until the end of the list is reached
Ninja is exploring new challenges and desires to reverse a given number. Your task is to assist Ninja in reversing the number provided.
If a number has trailing ze...
Implement a function to reverse a given number, omitting trailing zeros.
Create a function that takes an integer as input and reverses it while omitting trailing zeros
Use modulo and division operations to extract digits and reverse the number
Handle cases where the reversed number has leading zeros by omitting them
Ensure the reversed number is within the constraints specified
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 end to start and append each character to a new string.
Use built-in functions like reverse() or slicing to reverse the string.
Handle special characters and numbers while reversing the string.
Ensure to consider the constraints provided in the problem statement.
Overloading in OOP is the ability to define multiple methods with the same name but different parameters.
Overloading allows multiple methods with the same name but different parameters to coexist in a class.
The compiler determines which method to call based on the number and type of arguments passed.
Example: having multiple constructors in a class with different parameter lists.
Round duration - 60 minutes
Round difficulty - Medium
Technical round with question based on Web Dev, Cloud Computing, Networking etc.
TELNET is a network protocol used to establish a connection with a remote computer over a network.
TELNET stands for Telecommunication Network.
It allows a user to log in to a remote computer and execute commands as if they were directly connected to that computer.
TELNET operates on port 23.
It is not secure as the data is transmitted in plain text.
SSH (Secure Shell) is a more secure alternative to TELNET.
TELNET is insecure, while SSH is secure for remote access to servers.
TELNET sends data in plain text, while SSH encrypts data for secure communication
SSH uses public-key cryptography for authentication, TELNET does not
SSH provides secure remote access to servers, TELNET does not prioritize security
TELNET operates on port 23, while SSH operates on port 22
Given an array/list ARR
consisting of integers where each element is either 0, 1, or 2, your task is to sort this array in increasing order.
The input sta...
Sort an array of 0s, 1s, and 2s in increasing order.
Use a three-pointer approach to partition the array into sections of 0s, 1s, and 2s.
Iterate through the array and swap elements based on their values.
Time complexity should be O(n) to meet the constraints.
A hypervisor is a software that creates and runs virtual machines on a physical host machine.
Hypervisors allow multiple operating systems to run on a single physical machine
They provide isolation between virtual machines
Examples include VMware ESXi, Microsoft Hyper-V, and KVM
Cloud computing is like renting a computer over the internet instead of owning one.
Cloud computing allows users to access and store data and applications over the internet instead of on their own physical computer.
It offers scalability, flexibility, and cost-effectiveness as users can easily adjust their storage and computing needs.
Examples include services like Amazon Web Services (AWS), Microsoft Azure, and Google Cl
The stages in the Software Development Life Cycle include planning, design, development, testing, deployment, and maintenance.
1. Planning: Define project scope, requirements, and timelines.
2. Design: Create architecture, UI/UX, and database design.
3. Development: Write code based on design specifications.
4. Testing: Verify functionality, performance, and security.
5. Deployment: Release the software to users or clients.
...
Round duration - 60 minutes
Round difficulty - Medium
Technical Interview round with questions based on DSA and OOPS. A detailed discussion on my projects was also carried out.
Given three sorted arrays A
, B
, and C
of lengths N
, M
, and K
respectively, your task is to find all elements that are present in all three arrays.
The first...
Find common elements in three sorted arrays and output them in order.
Iterate through all three arrays simultaneously using three pointers.
Compare elements at pointers and move pointers accordingly.
If elements are equal, add to result and move all pointers forward.
If elements are not equal, move pointer of smallest element forward.
A volatile variable is a variable that can be modified by multiple threads simultaneously.
Volatile variables are used in multithreading to ensure visibility of changes made by one thread to other threads.
They are not cached in thread's local memory, but always read from main memory.
They are typically used for flags or status variables that are accessed by multiple threads.
Example: 'volatile boolean flag = true;'
Multithreading in Java allows multiple threads to execute concurrently, improving performance and responsiveness.
Multithreading allows multiple threads to run concurrently within a single process.
Threads share the same memory space, allowing for efficient communication and data sharing.
Java provides built-in support for multithreading through the Thread class and Runnable interface.
Example: Creating a new thread using ...
Round duration - 30 minutes
Round difficulty - Easy
HR round with typical behavioral problems.
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 Mar 2021.
Round duration - 60 minutes
Round difficulty - Easy
Need to write working code on a shared document so that the interviewer can see if you can put your ideas into code. In this round, they are not bothered about time complexity of your algorithm. They just wanted to know if you can code whatever you think. So if you do not find best solution also it is OK but write the code for average case at-least.
Given a sorted array that has been rotated clockwise by an unknown amount, you need to answer Q
queries. Each query is represented by an integer Q[i]
, and you must ...
Search for integers in a rotated sorted array efficiently.
Use binary search to find the pivot point where the array is rotated.
Based on the pivot point, apply binary search on the appropriate half of the array.
Return the index of the integer if found, else return -1.
Time complexity should be O(logN) for each query.
Given a Binary Search Tree (BST) and a target value 'K', determine if there exist two unique elements in the BST such that their sum equals the target 'K'.
A ...
Check if there exist two unique elements in a BST that sum up to a target value 'K'.
Traverse the BST in-order to get a sorted array of elements.
Use two pointers approach to find the pair sum in the sorted array.
Consider edge cases like duplicate elements or negative values.
Time complexity can be optimized to O(n) using a HashSet to store visited nodes.
Round duration - 60 minutes
Round difficulty - Medium
I was interviewed for vcloud team so they asked me questions on Cloud, DSA etc.
You are provided with a linked list having 'N' nodes and an integer 'K'. Your task is to reverse the linked list in groups of size K. If the list is numbered fro...
Reverse a linked list in groups of size K
Iterate through the linked list in groups of size K
Reverse each group of nodes
Handle cases where the last group may have fewer than K nodes
Reverse a given stack of integers using recursion. You must accomplish this without utilizing extra space beyond the internal stack space used by recursion. Additionally, you ...
Reverse a given stack of integers using recursion without using extra space or loops.
Use recursion to pop all elements from the original stack and store them in function call stack
Once the stack is empty, push the elements back in reverse order using recursion
Use the top(), pop(), and push() methods to manipulate the stack
Cloud computing is the delivery of computing services over the internet, including storage, databases, networking, software, and more.
Cloud computing allows users to access resources on-demand without the need for physical infrastructure.
Examples of cloud computing services include Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform.
Cloud computing offers scalability, flexibility, cost-effectiveness, ...
Cloud computing offers scalability, cost-efficiency, flexibility, and improved collaboration.
Scalability: Easily scale resources up or down based on demand without the need for physical infrastructure.
Cost-efficiency: Pay only for the resources you use, reducing upfront costs and maintenance expenses.
Flexibility: Access data and applications from anywhere with an internet connection, enabling remote work and collaborat...
Challenges of cloud computing include security concerns, data privacy issues, and potential downtime.
Security concerns: Data breaches and unauthorized access are major risks in cloud computing.
Data privacy issues: Ensuring compliance with regulations like GDPR can be challenging when data is stored in the cloud.
Potential downtime: Dependence on internet connectivity and cloud service providers can lead to downtime affe...
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.
based on 2 interviews
Interview experience
based on 4 reviews
Rating in categories
Associate Technical Consultant
40
salaries
| ₹0 L/yr - ₹0 L/yr |
Technical Lead
35
salaries
| ₹0 L/yr - ₹0 L/yr |
Senior Software Development Engineer
35
salaries
| ₹0 L/yr - ₹0 L/yr |
Senior Consultant
34
salaries
| ₹0 L/yr - ₹0 L/yr |
Software Developer
30
salaries
| ₹0 L/yr - ₹0 L/yr |
Dell
Hewlett Packard Enterprise
IBM
Cisco