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I applied via Referral and was interviewed in Feb 2024. There was 1 interview round.
Promises in JavaScript are objects representing the eventual completion or failure of an asynchronous operation.
Promises can be in one of three states: pending, fulfilled, or rejected.
Promises can be chained using .then() to handle success and .catch() to handle errors.
Promises can be created using the Promise constructor or by using async/await syntax.
useState is used to manage state in functional components, while useEffect is used to perform side effects in functional components.
useState is used to declare state variables in functional components.
useEffect is used to perform side effects in functional components, such as data fetching, subscriptions, or manually changing the DOM.
useState does not trigger re-renders, while useEffect can be used to trigger re-render...
Callback hell is a situation where multiple nested callbacks make the code difficult to read and maintain.
Occurs when multiple asynchronous operations are nested within each other
Leads to deeply nested code structure which is hard to understand
Can be avoided by using Promises, async/await, or modularizing code
Traditional functions are defined using the function keyword, while arrow functions are defined using a concise syntax with =>.
Traditional functions are hoisted, while arrow functions are not.
Arrow functions do not have their own 'this' keyword, they inherit it from the parent scope.
Arrow functions are more concise and easier to read compared to traditional functions.
Traditional functions are better for methods in obje...
Creating a counter in React to increment and decrement a value.
Create a state variable to store the count value
Use setState to update the count value
Render the count value in the component
Add buttons to increment and decrement the count value
Program to find frequency of letters in a string
Create an object to store the frequency of each letter
Loop through the string and increment the count of each letter in the object
Convert the object into an array of strings with letter and frequency pairs
Iterate through the given string to check if the substring is present.
Iterate through the given string and check if each character matches the first character of the substring.
If a match is found, check the subsequent characters to see if they form the substring.
Return true if the entire substring is found within the given string, otherwise return false.
I applied via LinkedIn and was interviewed in Nov 2020. There were 4 interview rounds.
I applied via Campus Placement and was interviewed in Dec 2020. There were 5 interview rounds.
Program to print a pattern and implement bubble sort on an array of strings.
For pattern printing, use nested loops to print the desired pattern.
For bubble sort, compare adjacent elements and swap if necessary.
Use a loop to iterate through the array until no more swaps are needed.
I applied via Naukri.com and was interviewed in Aug 2020. There were 5 interview rounds.
Interfaces define a contract for classes to implement certain methods and properties.
Interfaces allow for polymorphism and loose coupling.
Classes can implement multiple interfaces.
Interfaces cannot be instantiated on their own.
Interfaces can have default method implementations.
Interfaces can be used to enforce design patterns like the adapter pattern.
Computer networking is the practice of connecting devices together to share resources and communicate with each other.
Computer networking involves the use of hardware and software to connect devices together, such as computers, printers, and servers.
Networking protocols, such as TCP/IP, are used to facilitate communication between devices.
Examples of computer networks include local area networks (LANs), wide area netwo...
posted on 12 Jun 2021
I appeared for an interview before Sep 2020.
Round duration - 45 Minutes
Round difficulty - Easy
The round was conducted at 12 in the college campus. It was a pen and paper based coding round and had 2 coding questions for which we had to write the best approach.
Given an array Arr
consisting of N integers, your task is to find the equilibrium index of the array.
An index is considered as an equilibrium index if the sum of elem...
Find the equilibrium index of an array where sum of elements on left equals sum on right.
Iterate through the array and calculate the total sum of all elements.
Then iterate again and keep track of the left sum and right sum, checking for equilibrium.
Return the index when left sum equals right sum, or -1 if no equilibrium index found.
You are given a singly linked list of integers. Your task is to sort the linked list using the merge sort algorithm.
Merge Sort is a divide and conq...
Implement merge sort algorithm to sort a singly linked list of integers.
Divide the linked list into two halves using slow and fast pointers.
Recursively sort the two halves.
Merge the sorted halves using a merge function.
Handle base cases like empty list or single node list.
Ensure the termination of the linked list with -1 at the end.
Round duration - 45 Minutes
Round difficulty - Easy
There were 2 coding questions and we had to write the best approach for the questions.
Convert a given string 'S' into its equivalent representation based on a mobile numeric keypad sequence. Using the keypad layout shown in the reference, output the seque...
Convert a given string into its equivalent representation based on a mobile numeric keypad sequence.
Create a mapping of characters to their corresponding numeric keypad sequences.
Iterate through the input string and append the numeric sequence for each character to the output.
Handle lowercase characters only, ignore special characters, capital letters, and spaces in the input string.
You are provided with a string 'STR'
that consists of lowercase English letters ranging from 'a' to 'z'. Your task is to determine all non-empty possible subsequen...
Generate all possible subsequences of a given string.
Use recursion to generate all possible subsequences by including or excluding each character in the string.
Maintain a current index to keep track of the characters being considered.
Append the current character to each subsequence generated so far.
Recursively call the function with the next index to include the next character in subsequences.
Round duration - 40 minutes
Round difficulty - Easy
The interviewer asked me questions from arrays, strings and linked list.
Given an array of integers with 'N' elements, determine the length of the longest subsequence where each element is greater than the previous element. This...
Find the length of the longest strictly increasing subsequence in an array of integers.
Use dynamic programming to keep track of the longest increasing subsequence ending at each element.
Initialize an array to store the lengths of the longest increasing subsequences.
Iterate through the array and update the lengths based on the previous elements.
Return the maximum length found in the array.
Given an integer N
, determine whether its binary representation is a palindrome.
The first line contains an integer 'T' representing the number of test cases.
The next 'T'...
Check if the binary representation of a given integer is a palindrome.
Convert the integer to binary representation.
Check if the binary representation is a palindrome by comparing it with its reverse.
Return true if it is a palindrome, false otherwise.
Tip 1 : Do at-least 200+ dsa problems from various topics.
Tip 2 : Make 2-3 projects and be well versed with their functionality.
Tip 3 : Practice aptitude questions and time yourself while doing the questions.
Tip 1 : Keep your resume short, try to make it one pager only.
Tip 2 : Mention only position specific projects, and if you have got a good academic score mention it on top.
C++ is an extension of C with object-oriented programming features.
C++ supports classes and objects while C does not.
C++ has better support for polymorphism and inheritance.
C++ has a standard template library (STL) which C does not have.
C++ allows function overloading while C does not.
C++ has exception handling while C does not.
For loop is used for iterating over a sequence while while loop is used for iterating until a condition is met.
For loop is used when the number of iterations is known beforehand
While loop is used when the number of iterations is not known beforehand
For loop is faster than while loop for iterating over a sequence
While loop is useful for iterating until a specific condition is met
For loop can be used with range() functio...
To reverse a string without using any looping and inbuilt functions, we can use recursion.
Create a function that takes a string as input.
If the length of the string is 0 or 1, return the string.
Otherwise, call the function recursively with the substring starting from the second character and concatenate the first character at the end.
Return the reversed string.
Example: reverseString('hello') returns 'olleh'.
A priority queue can be implemented using a single queue or multiple queues.
One approach is to use a single queue and assign priorities to elements using a separate data structure.
Another approach is to use multiple queues, each representing a different priority level.
For example, if there are three priority levels, three queues can be used to implement the priority queue.
An array of objects can be used to implement a heterogeneous array.
Each element in the array can be an object that represents a different data type.
The objects can have different properties and methods based on their respective data types.
For example, an element can be an object representing a string with a 'value' property and a 'length' method.
Developed a web-based inventory management system for a retail company.
Used HTML, CSS, and JavaScript for the front-end development.
Implemented a RESTful API using Node.js and Express for the back-end.
Utilized a MySQL database to store and manage inventory data.
Implemented features like product search, order management, and reporting.
Ensured data security and user authentication using encryption and JWT.
Collaborated wi...
The missing rupee is not actually missing. The calculation is misleading and does not account for the total amount paid.
The initial amount paid by each person was Rs.10, totaling Rs.30.
The owner gave them a discount of Rs.5, so they paid Rs.25 in total.
The broker took Rs.2, leaving them with Rs.23.
When the broker returned Rs.1 to each person, they each received Rs.1 back, totaling Rs.3.
So, the total amount paid by the ...
Inheritance in Java allows a class to inherit properties and methods from another class.
Inheritance is achieved using the 'extends' keyword.
The class that is being inherited from is called the superclass or parent class.
The class that inherits from the superclass is called the subclass or child class.
Subclasses can access the public and protected members of the superclass.
Inheritance promotes code reusability and allow...
A program to check if a given number is a palindrome or not.
Convert the number to a string.
Reverse the string and compare it with the original string.
If they are equal, the number is a palindrome.
If not, the number is not a palindrome.
Normalisation is the process of organizing data in a database to reduce redundancy and improve data integrity.
It involves breaking down a table into smaller tables and defining relationships between them.
Normalization helps to eliminate data inconsistencies and anomalies.
There are different levels of normalization, with each level having specific rules to follow.
For example, first normal form (1NF) requires that each t...
Yes, I am ready to relocate anywhere in India or outside upon company needs.
I am open to exploring new locations and cultures.
I understand that relocation may be necessary for career growth and opportunities.
I am adaptable and willing to adjust to new environments.
I have experience working in diverse teams and can easily integrate into new settings.
I would be ready to accept a project in Java even if I was trained in DotNet earlier.
I have a strong foundation in programming principles and concepts, which can be applied to any language.
I am confident in my ability to quickly learn and adapt to new technologies.
I have experience working with multiple programming languages and frameworks.
I can leverage my knowledge of DotNet to understand similar concepts in Java.
I a...
I want to join Sapient because of its reputation for innovative projects and collaborative work environment.
Sapient is known for working on cutting-edge projects that push the boundaries of technology
I value the collaborative work environment at Sapient, where team members support each other to achieve success
I am impressed by Sapient's commitment to professional development and growth opportunities for employees
My expectations from Sapient
I expect Sapient to provide a challenging and innovative work environment
I expect Sapient to offer opportunities for professional growth and learning
I expect Sapient to have a collaborative and supportive team culture
I expect Sapient to provide competitive compensation and benefits
I expect Sapient to have a strong focus on quality and delivering excellent software solutions
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