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I applied via Instahyre and was interviewed in Jun 2024. There was 1 interview round.
Sql question joins and , retention, streaks , window function
Top trending discussions
I applied via Company Website and was interviewed in Feb 2024. There were 2 interview rounds.
SQL based leetcode medium and hackerrank
Python take home EDA case study assessment
I applied via Referral and was interviewed in Feb 2024. There was 1 interview round.
SQL query to retrieve employee names and their salaries from a table
Use SELECT statement to retrieve data
Specify the columns you want to retrieve (employee names and salaries)
Specify the table name where the data is stored
VLOOKUP is a function in Excel used to search for a value in a table and return a corresponding value.
VLOOKUP searches for a value in the first column of a table and returns a value in the same row from a specified column.
The formula syntax is =VLOOKUP(lookup_value, table_array, col_index_num, [range_lookup]).
Example: =VLOOKUP(A2, B2:D10, 3, FALSE) will search for the value in cell A2 in the range B2:D10 and return the...
Easy coding questions
Tough level questions , needed high level of thinking
I applied via Referral and was interviewed in Feb 2024. There was 1 interview round.
Estimate the number of users on the application based on market research, user demographics, and industry trends.
Consider the total addressable market (TAM) for the application
Analyze user demographics and behavior to estimate adoption rate
Look at industry benchmarks and competitor data for reference
Use surveys, focus groups, and user feedback to gather insights
Consider factors like market saturation, growth potential,
I was interviewed before Feb 2024.
There were two coding questions; one was related to linked lists, and the other was linked to binary trees.
Developed a web application for tracking inventory and sales data
Used React for front-end development
Implemented RESTful APIs using Node.js and Express for back-end
Utilized MongoDB for database management
Integrated authentication and authorization features for secure access
Implemented data visualization using Chart.js
Reversing a linked list involves changing the direction of pointers to go from the end to the beginning.
Start by initializing three pointers: current, previous, and next.
Iterate through the linked list, updating the pointers to reverse the direction of the links.
Update the head of the linked list to point to the new first node, which was the original last node.
Program to find perfect squares between two numbers
Iterate through numbers between the given range
Check if the square root of the number is an integer
If yes, then it is a perfect square
Smart pointers in C++ are objects that act like pointers but provide automatic memory management.
Smart pointers help prevent memory leaks by automatically managing memory allocation and deallocation.
Examples include unique_ptr, shared_ptr, and weak_ptr.
unique_ptr is used for exclusive ownership, shared_ptr for shared ownership, and weak_ptr to prevent circular references.
Mutual exclusion is a concept in concurrent programming where only one thread can access a shared resource at a time.
Ensures that only one thread can access a critical section of code at a time
Prevents race conditions and data corruption
Commonly implemented using locks, semaphores, or mutexes
Example: Using a mutex to protect a shared variable in a multi-threaded application
Implementing multithreading involves creating and managing multiple threads to execute tasks concurrently.
Identify the tasks that can be executed concurrently
Create and manage multiple threads to execute these tasks simultaneously
Use synchronization techniques like locks and semaphores to prevent race conditions
Handle communication and coordination between threads
Consider thread safety and resource sharing issues
Basic coding test like palindrome, series,arrays
Search for a target value in a 2D matrix efficiently.
Use binary search on rows to find the potential row where the target value may exist.
Then use binary search on that row to find the target value.
Find quadraplets in an array that sum up to a target value.
Use a nested loop to iterate through all possible combinations of quadraplets.
Keep track of the sum of each quadraplet and compare it to the target value.
Return the quadraplets that match the target sum.
Different question were asked on sql python java
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