Asianet Satellite Communications Network Engineer Interview Questions and Answers

Technical aspects about linked list,trees, stacks

Topic related to humanities

I was given a case study to write multiple outputs by lookinginto a program.

Q1. Sort colours or the dutch flag problem
Ans. 
The Dutch Flag problem involves sorting an array of strings with three possible values in a specific order.
• Create three pointers to keep track of the boundaries of each color group

• Iterate through the array and swap elements to group them in the correct order

• Time complexity of O(n) can be achieved by a single pass through the array
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Q1. Rotate array leetcode question
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Q2. Longest palindormic substring
Ans. 
A palindrome is a word, phrase, number, or other sequence of characters that reads the same forward and backward.
• Use dynamic programming to solve this problem efficiently.

• Iterate through the string and expand around each character to find the longest palindrome.

• Consider both odd and even length palindromes.

• Example: Input 'babad', Output 'aba' or 'bab'.
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Q1. Print all the subsequences of a string
Ans. 
Generate all possible subsequences of a given string.
• Use recursion to generate all possible combinations of characters in the string.

• At each step, include or exclude the current character to form subsequences.

• Store each subsequence in an array of strings.
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Q2. Print longest substring with k unique values
Ans. 
Find and print the longest substring with k unique characters in an array of strings.
• Iterate through the array of strings and keep track of the longest substring with k unique characters.

• Use a sliding window approach to efficiently find the longest substring.

• Keep a hashmap to store the frequency of characters in the current window.

• Update the window boundaries based on the number of unique characters.

• Return the longest
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Q1. Behaviour quesions
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Q1. Rain water problem
Ans. 
The rain water problem involves calculating the amount of rainwater that can be trapped between buildings or structures.
• Calculate the maximum height of water that can be trapped at each position

• Subtract the height of the building at each position to get the water level

• Sum up the water levels at each position to get the total amount of trapped rainwater
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Q2. 2 sum problemjijo
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The written test consisted of two DS programs.

1 hour in testing problem solving and basic math

Coding round with graph and tree questions