Nuclei Java Developer Interview Questions, Process, and Tips

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Q1. Based on cn and dsa
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Q2. Based on the os
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Round duration - 45 minutes
Round difficulty - Medium

Timing was 12 PM. Interviewer was nice.

Q1. 
Reverse the String Problem Statement
You are given a string STR which contains alphabets, numbers, and special characters. Your task is to reverse the string.
Example:
Input:
STR = "abcde"
Output:
"e...read more
Ans. Optimal Solution
• Traverse the string and swap the first character with the last character, the second character with the second last character and so on.
• Basically, you need to swap the i-th character with the (N-i-1)-th character where N is the length of the string and 0-based indexing is considered.
Space Complexity: O(1)Explanation:
O(1).
 
In the worst case, only constant extra space is required.
Time Complexity: O(...read more
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Q2. 
Move Zeros to Left Problem Statement
Your task is to rearrange a given array ARR such that all zero elements appear at the beginning, followed by non-zero elements, while maintaining the relative order of...read more
Ans. Solution Using Extra space
The idea is to use an extra vector to store all the non-zero elements while maintaining their relative order. So we will first add all the non-zero elements to a vector and then iterate that vector backwards and start updating the array values from end. In the end we will set all the array values whose values were not updated to 0. 
Steps:
1. Let storeNonZero be the vector that stores non-zero...read more
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Q3. Write an SQL query to find the second highest salary from a table.
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