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Use 'pkill' command with '-f' option to kill all java processes.
Open terminal or command prompt
Type 'pkill -f java' and press enter
All java processes will be terminated
Use inotifywait command to monitor file changes in Linux.
Install inotify-tools package
Use inotifywait command with options like -m for continuous monitoring and -e for specific events
Example: inotifywait -m /var/log/messages -e modify
Output will show the file path, event type and timestamp
A process in Linux is a running instance of a program or command.
A process is identified by a unique process ID (PID)
Processes can be started, stopped, and managed using commands like ps, kill, and top
Processes can run in the foreground or background
Processes can communicate with each other through inter-process communication (IPC)
Examples of processes include web servers, database servers, and user applications
Linux boot process involves several stages including BIOS, bootloader, kernel initialization, and user space initialization.
BIOS performs a power-on self-test and loads the bootloader from the boot device.
Bootloader loads the kernel into memory and initializes it.
Kernel initializes hardware, mounts the root file system, and starts the init process.
Init process starts user space processes and services.
Linux boot process...
Yes, by using regular expressions to match phone number patterns.
Use regular expressions to match phone number patterns
Common phone number patterns include (XXX) XXX-XXXX and XXX-XXX-XXXX
Consider international phone number formats as well
Use a programming language with regex support, such as Python or JavaScript
Chef is a configuration management tool used for automating infrastructure deployment and management.
Chef helps in automating the process of configuring and managing servers and applications.
It allows for consistent and repeatable infrastructure deployments.
Chef can be used to manage both on-premises and cloud-based infrastructure.
It provides a centralized platform for managing configurations and enforcing policies.
Che...
Ruby program to check directory existence and write permissions.
Use File.exist? method to check if directory exists.
Use File.writable? method to check if directory has write permissions.
Combine both methods to get the desired result.
Optimise SQL query by identifying bottlenecks and improving indexing and query structure.
Identify slow performing queries using profiling tools
Improve indexing by adding or removing indexes
Rewrite query structure to reduce complexity and improve performance
Use query optimisation techniques like subqueries and joins
Consider caching frequently accessed data
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I appeared for an interview before Apr 2021.
Round duration - 45 minutes
Round difficulty - Easy
This was a test where 2 coding questions were to be solved in 45 minutes.
Given a column title as it appears in an Excel sheet, your task is to return its corresponding column number.
S = "AB"
28
The seq...
Convert Excel column title to corresponding column number.
Iterate through the characters in the input string from right to left
Calculate the value of each character based on its position and multiply by 26^index
Sum up the values to get the final column number
Determine if two given strings, str1
and str2
, are permutations of each other.
Two strings are permutations of each other if the characters of one string can be re...
Check if two strings are permutations of each other.
Create character frequency maps for both strings.
Compare the frequency maps to check if they are permutations.
Handle edge cases like empty strings or strings of different lengths.
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.
The importance of problem-solving skills and teamwork.
Developed problem-solving skills through challenging coursework and projects.
Collaborated with diverse teams to complete group projects.
Participated in hackathons and coding competitions to enhance skills.
Learned to manage time effectively and prioritize tasks.
Developed a strong work ethic and dedication to excellence.
CommonFloor is a real estate platform that helps people find and rent/buy properties.
CommonFloor was founded in 2007 and is based in Bangalore, India.
It offers a range of services including property listings, property management, and home loans.
The platform has over 5 million registered users and lists properties in over 200 cities in India.
In 2016, CommonFloor was acquired by Quikr, another Indian online classifieds p
I appeared for an interview before Feb 2021.
Round duration - 60 minutes
Round difficulty - Easy
It comprised of general aptitude questions and two coding questions. It was an offline test.
Given an integer N
, find all possible placements of N
queens on an N x N
chessboard such that no two queens threaten each other.
A queen can attack another queen if they ar...
The N Queens Problem involves finding all possible placements of N queens on an N x N chessboard where no two queens threaten each other.
Use backtracking algorithm to explore all possible configurations.
Keep track of rows, columns, and diagonals to ensure queens do not attack each other.
Generate and print valid configurations where queens are placed safely.
Consider constraints and time limit for efficient solution.
Exam...
Given an integer array arr
of size 'N' containing only 0s, 1s, and 2s, write an algorithm to sort the array.
The first line contains an integer 'T' representing the n...
Sort an integer array containing only 0s, 1s, and 2s in linear time complexity.
Use three pointers to keep track of the positions of 0s, 1s, and 2s in the array.
Iterate through the array and swap elements based on the values encountered.
Achieve sorting in a single scan over the array without using any extra space.
Round duration - 60 minutes
Round difficulty - Easy
After having a technical discussion about my CV. He gave me two questions to code.
Ninja has to determine all the distinct substrings of size two that can be formed from a given string 'STR' comprising only lowercase alphabetic characters. These su...
Find all unique contiguous substrings of size two from a given string.
Iterate through the string and extract substrings of size two
Use a set to store unique substrings
Return the set as an array of strings
Determine if a given singly linked list of integers forms a cycle or not.
A cycle in a linked list occurs when a node's next
points back to a previous node in the ...
Detect if a singly linked list forms a cycle by checking if a node's next points back to a previous node.
Traverse the linked list using two pointers, one moving one step at a time and the other moving two steps at a time.
If the two pointers meet at any point, there is a cycle in the linked list.
If one of the pointers reaches the end of the list (null), there is no cycle.
Round duration - 30 minutes
Round difficulty - Easy
This was supposed to be the HR round but out of surprise the interviewer started by giving me a question to code.
After I approached this question with the right solution he just asked about my family. After that he said to wait. After half an hour the results were announced. A total of three students were hired and I was amongst one of them.
Given an integer N
representing the number of pairs of parentheses, find all the possible combinations of balanced parentheses using the given number of pairs.
Generate all possible combinations of balanced parentheses for a given number of pairs.
Use recursion to generate all possible combinations of balanced parentheses.
Keep track of the number of open and close parentheses used in each combination.
Return the valid combinations as an array of strings.
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 LinkedIn and was interviewed in Jan 2023. There were 3 interview rounds.
It was 2 coding questions of medium level
Find the longest substring in a given string that does not contain any repeating characters.
Use a sliding window approach to iterate through the string.
Keep track of the characters seen so far using a set.
Update the start and end indices of the window to find the longest substring.
Return the length of the longest substring.
I applied via Campus Placement and was interviewed before Aug 2022. There were 5 interview rounds.
There were 2 questions to test our basic coding knowledge.
Data structures are used in various applications like search algorithms, storage systems, and graph algorithms.
Search algorithms like binary search use arrays and trees for efficient searching.
Storage systems use data structures like hash tables and linked lists for organizing and accessing data.
Graph algorithms like Dijkstra's algorithm use graphs and trees for solving complex problems.
Launch modes on Android determine how a new instance of an activity is associated with the current task.
Standard: Creates a new instance of the activity in the task's stack
SingleTop: If an instance of the activity already exists at the top of the stack, it will not be recreated
SingleTask: Activity is always at the root of the task and no other activities can be on top of it
SingleInstance: Similar to SingleTask, but the
Questios based on Activity backstacks
I applied via Naukri.com and was interviewed before Dec 2020. There were 3 interview rounds.
Data structure - rainwater trapping
Design a car parking lot system
Determine the size and capacity of the parking lot
Create a database to store information about available spots and occupied spots
Develop a system to track the entry and exit of vehicles
Implement a payment system for parking fees
Incorporate security measures such as CCTV cameras and security personnel
Provide a user-friendly interface for customers to locate available spots and make payment
Easy Lettcode questions multiple
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