Freightify Front end Developer Interview Questions and Answers

Coding test in javascript

Q1. React js questions
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Q2. Angular js questions
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Q1. Find the longest sequence of numbers that are in ascending order.
Ans. 
Find the longest sequence of ascending numbers in an array.
• Iterate through the array and keep track of the current sequence length

• Reset the sequence length when a number is not in ascending order

• Return the longest sequence found
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Q2. Give a list of numbers and a target. You need to find the pair of numbers, whose value will be equal to target when we subtract
Ans. 
Find a pair of numbers in a list that subtract to a target value
• Iterate through the list of numbers and store each number in a hashmap along with its index

• For each number, check if the difference between the target and the number exists in the hashmap

• Return the pair of numbers if found, otherwise return an empty array
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Q1. Given a json, asked to make it a proper json
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Q2. Asked to write a code for mean, median and sum of values of all unique items in the json.
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Its was data structure and algorithm and SQL round 4 question of dsa and 2 question of sql

Q1. How does OTP less work make a systematic diagram for it/
Ans. 
OTP less work eliminates the need for one-time passwords for authentication.
• OTP less work uses alternative methods like biometrics, push notifications, or hardware tokens for authentication.

• It provides a more seamless and user-friendly authentication experience.

• Examples include fingerprint scanning on smartphones or security keys for two-factor authentication.
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Q1. Everything related to yourself.
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Q1. Jump Game - II
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Q2. Number of Island
Ans. 
Count the number of islands in a given grid of '1's and '0's.
• Iterate through the grid and for each '1' encountered, perform a depth-first search to mark all connected '1's as visited.

• Increment the island count for each new island encountered.

• Consider edge cases like grid boundaries and handling visited cells.
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50 questions in 12 minutes mostly test your arthimetic, logical knowledge.

3 coding questions in 90 mins, 1st one is from arrays an easy question, 2nd one is related to stacks and queues relatively harder and last one is hard which i am also unable to attempt. I cracked the first two questions and my solutions passed all the test cases.

Q1. Difference between sorting algorithms
Ans. 
Sorting algorithms are methods used to arrange elements in a specific order.
• Different sorting algorithms include bubble sort, selection sort, insertion sort, merge sort, quick sort, and heap sort.

• Some algorithms are more efficient than others depending on the size of the data set and the initial order of the elements.

• For example, quick sort is generally faster than bubble sort for large data sets.
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Q2. BFS and DFS in trees and imlementing them
Ans. 
BFS and DFS are traversal algorithms used in trees. BFS explores level by level, while DFS explores depth first.
• BFS (Breadth-First Search) visits nodes level by level, using a queue. Example: traversing a binary tree level by level.

• DFS (Depth-First Search) explores as far as possible along each branch before backtracking. Example: in-order traversal of a binary tree.
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Q3. Sql questions and database questions
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Q1. Tell me about yourself
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Q2. Explain the college life
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Question from Array,DP

Q1. Resume based only
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Q2. Data structure and algorithms
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Q3. Object oriented programmings
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Q1. Behavioural questions
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Q1. Basic resume based questions
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Q2. Explain your internship experience
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Q1. Basic resume based questions
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NEED TO QUALIFY IN THIS TEST

NEED TO QUALIFY THIS TEST ALSO

Q1. SOME DSA AND ROLE BASED QUATIONS.
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