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FiftyFive Technologies
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I applied via Approached by Company and was interviewed in Oct 2024. There was 1 interview round.
Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope.
Variable declarations are hoisted to the top of the function or global scope.
Function declarations are also hoisted to the top of the function or global scope.
However, only the declarations are hoisted, not the initializations.
Hooks in ReactJS are functions that let you use state and other React features without writing a class.
Hooks were introduced in React 16.8 to allow functional components to have state and lifecycle methods.
Some commonly used hooks are useState, useEffect, useContext, and useReducer.
Hooks allow you to reuse stateful logic across multiple components without changing the component hierarchy.
Example: useState hook allows y...
I applied via Naukri.com and was interviewed in Jul 2024. There was 1 interview round.
Closures in JavaScript allow functions to access variables from an outer function even after the outer function has finished executing.
Closures are created whenever a function is defined within another function.
Inner functions have access to the outer function's variables even after the outer function has returned.
Closures can be used to create private variables and functions in JavaScript.
Example: function outerFuncti...
Higher order functions in JavaScript are functions that can take other functions as arguments or return functions as output.
Higher order functions can be used to create more flexible and reusable code.
Examples include functions like map, filter, and reduce in JavaScript.
Higher order functions can help with tasks like data manipulation, event handling, and asynchronous programming.
Map and reduce functions are higher-order functions in JavaScript used to transform and aggregate data in arrays.
Map function applies a function to each element in an array and returns a new array with the results.
Reduce function applies a function to each element in an array, accumulating a single value.
Example: const numbers = [1, 2, 3]; const doubled = numbers.map(num => num * 2); const sum = numbers.reduce((acc, cu
Enums in TypeScript allow developers to define a set of named constants.
Define an enum using the 'enum' keyword followed by the enum name and list of constants
Access enum values using the enum name followed by a dot and the constant name
Enums can have string or numeric values, and can also be used as types
Event loop in JavaScript manages asynchronous operations by executing callback functions in a queue.
Event loop is responsible for handling asynchronous operations in JavaScript.
It allows non-blocking I/O operations by executing callback functions in a queue.
Event loop continuously checks the call stack and the callback queue to determine which function to execute next.
Use the sort() method in JavaScript to sort an array of strings.
Use the sort() method with a compare function to sort the array alphabetically.
Example: array.sort((a, b) => a.localeCompare(b));
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posted on 21 Mar 2015
I was interviewed before Aug 2016.
I was interviewed in Apr 2017.
I am a software developer with a passion for coding and problem-solving. My family is supportive and has always encouraged my career in tech.
Experienced software developer
Passionate about coding and problem-solving
Supportive family that encourages my career in tech
I was interviewed before Mar 2021.
Round duration - 60 minutes
Round difficulty - Easy
This was an easy round which went really smooth.
Calculate the Nth term in the Fibonacci sequence, where the sequence is defined as follows: F(n) = F(n-1) + F(n-2)
, with initial conditions F(1) = F(2) = 1
.
Calculate the Nth Fibonacci number efficiently using dynamic programming.
Use dynamic programming to store previously calculated Fibonacci numbers to avoid redundant calculations.
Start with base cases F(1) and F(2) as 1, then iteratively calculate F(n) using F(n-1) and F(n-2).
Ensure the input N is within the constraints 1 <= N <= 10000.
Example: For N = 5, the 5th Fibonacci number is 5 (1, 1, 2, 3, 5).
Given a positive integer N
, your task is to determine and return all prime numbers less than or equal to N
.
N = 10
2 3 5 7
N = 20
Implement a function to return all prime numbers less than or equal to a given positive integer N.
Create a function that takes a positive integer N as input
Iterate from 2 to N and check if each number is prime
Use a helper function to determine if a number is prime
Return an array of all prime numbers less than or equal to N
A merge join in SQL is a method of combining two sorted datasets by matching corresponding rows based on a specified condition.
Merge join is used when joining two large datasets that are already sorted.
It is more efficient than other join methods like nested loop join or hash join for sorted datasets.
The join condition must be an equality condition.
Example: SELECT * FROM table1 INNER JOIN table2 ON table1.id = table2.i
Round duration - 30 minutes
Round difficulty - Easy
The round went excellent. I really enjoyed it. Just be confident about whatever you answer
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
This round went well. Interview depends on your basic knowledge of C/C++.
Given two sparse matrices MAT1
and MAT2
of integers with dimensions 'N' x 'M' and 'M' x 'P' respectively, the goal is to determine the resulting matrix produced by their multipl...
Implement a function to multiply two sparse matrices and return the resulting matrix.
Create a function that takes two sparse matrices as input and returns the resulting matrix after multiplication
Iterate through the non-zero elements of the matrices to perform the multiplication efficiently
Handle the edge cases such as empty matrices or matrices with all zero elements
Ensure the dimensions of the matrices are compatible
Tanmay and Rohit are best buddies. Tanmay gives Rohit a challenge involving an array of N natural numbers. The task is to perform and answer a series of queries on the ...
Count the number of even or odd numbers in a range of an array based on given queries.
Create an array to store the input numbers.
Iterate through the queries and update or count even/odd numbers based on the query type.
Output the count of even or odd numbers for each query of type 1 or 2.
Round duration - 30 minutes
Round difficulty - Easy
Typical HR round with 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 in Jul 2017.
I was interviewed in Apr 2017.
Firmware is a type of software that is embedded in hardware devices to control their functionality.
Firmware is a combination of hardware and software.
It is used to control the behavior of hardware devices.
Firmware is typically stored in non-volatile memory, such as ROM or flash memory.
Examples of devices that use firmware include routers, printers, and digital cameras.
I am a passionate software developer with experience in building web applications and solving complex problems.
Experienced in programming languages such as Java, JavaScript, and Python
Familiar with front-end technologies like HTML, CSS, and React
Strong problem-solving skills and ability to work in a team environment
Previous projects include developing a customer management system for a small business
I applied via Campus Placement
based on 2 interviews
Interview experience
based on 1 review
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