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I applied via LinkedIn and was interviewed in May 2021. There was 1 interview round.
Multiprocessing is the use of multiple processors to execute multiple tasks simultaneously. Multithreading is the use of multiple threads within a single process to execute multiple tasks simultaneously.
Multiprocessing involves the use of multiple processors or cores to execute multiple tasks simultaneously.
Multithreading involves the use of multiple threads within a single process to execute multiple tasks simultaneou...
Simulating one user profile to another can be done through user impersonation.
User impersonation can be achieved through various tools and techniques.
One way is to use a proxy server to intercept and modify the user's requests and responses.
Another way is to use a browser extension or plugin that allows you to switch between user profiles.
You can also use a testing tool like Selenium to automate the process of switchin...
bashrc and .profile are configuration files for the Bash shell in Linux/Unix systems.
bashrc is executed for every new interactive shell session
.profile is executed only once during login
They contain environment variables, aliases, and other shell settings
bashrc is typically used for user-specific settings, while .profile is system-wide
Examples: setting PATH variable, defining aliases, setting prompt
Code using multithreading to scan 3 log files for different patterns and write matches in o/p file with low memory footprint.
Use Python's threading module to create multiple threads for each log file
Use regex to search for patterns in each log file
Write matches to output file using a thread-safe queue
Use a memory-efficient data structure like deque to store log file lines
Code to run as a service to scan CPU/memory every 30 sec and calculate min, max, avg and moving avg of last 300 sec.
Use a loop to run the code every 30 sec
Use psutil library to get CPU/memory usage
Store the values in a list and calculate min, max, avg and moving avg using numpy library
Use threading to run the code in the background as a service
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I applied via Campus Placement
I am an avid traveler and have visited over 20 countries
I love experiencing new cultures and trying new foods
I have backpacked through Europe and Asia
I have volunteered in orphanages in Cambodia and Nepal
Mobile advertising platform
Adtech
Mobile marketing
App monetization
Maximum sub sequence sum in an array
Use Kadane's algorithm
Initialize max_so_far and max_ending_here to 0
Iterate through the array and update max_ending_here and max_so_far
Return max_so_far
Endianness refers to the byte order of a system. It determines how multi-byte data types are stored in memory.
Little-endian systems store the least significant byte first, while big-endian systems store the most significant byte first.
Endianness can affect the way data is transmitted between systems.
To determine the endianness of a system, you can use the byte order mark (BOM) or write a test program that checks the by...
Sort an array of 0's and 1's only.
Use two pointers, one at the beginning and one at the end of the array.
Swap 0's from the beginning with 1's from the end until the pointers meet.
Alternatively, use a counting sort algorithm to count the number of 0's and 1's and then reconstruct the array.
Heaps are data structures used to efficiently find the maximum or minimum element in a collection.
Max heap: parent nodes are always greater than or equal to child nodes
Min heap: parent nodes are always smaller than or equal to child nodes
Heaps are commonly used in priority queues and sorting algorithms
Heap operations include insert, delete, and extract max/min
Example: An array [3, 8, 2, 5, 1, 4, 6] can be represented a
Find 3 numbers in an array where a+b=c.
Loop through the array and check for all possible combinations of a and b.
Use a hash table to store the values of a and b, and check if c is present in the hash table.
Sort the array and use two pointers to find a and b, and then check if their sum equals c.
Algorithms for manipulating arrays and strings in coding
Use sorting algorithms like quicksort and mergesort for arrays
Use string manipulation functions like substring and replace for strings
Use dynamic programming for optimizing solutions to array and string problems
Designing a large scale Ad Server
Use distributed systems for scalability
Implement caching for faster ad delivery
Ensure high availability and fault tolerance
Use real-time bidding for efficient ad placement
Implement fraud detection mechanisms
Ensure compliance with privacy regulations
I applied via LinkedIn and was interviewed in Jan 2021. There were 5 interview rounds.
I applied via Naukri.com and was interviewed before May 2021. There were 4 interview rounds.
It was mixed like aptitude and from technical.
I applied via Campus Placement and was interviewed before Jul 2021. There were 3 interview rounds.
General aptitude test with math and logic related questions. there were also coding questions which were given more weightage than the other questions.
I applied via Campus Placement and was interviewed before Aug 2021. There were 4 interview rounds.
Coding cum aptitude test on Hackerrank
Some of the top questions asked at the PubMatic Automation Engineer interview -
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InMobi
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Adcolony
Affle