
WatchGuard Technologies

WatchGuard Technologies Software Developer Interview Questions and Answers
Q1. Distinct Elements in K-Sized Windows
The task is to determine the number of distinct elements in every sliding window of size 'K' across an array 'ARR' of size 'N'. A 'K' sized window is a contiguous sequence o...read more
Calculate the count of distinct elements in each sliding window of size 'K' across an array 'ARR'.
Use a sliding window approach to iterate through the array and keep track of distinct elements using a hashmap or set.
Update the count of distinct elements in each window as it slides across the array.
Return the array detailing the count of distinct elements in each 'K' sized window for each test case.
Q2. 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:
"edcba"
Input...read more
Reverse a given string containing alphabets, numbers, and special characters.
Iterate through the string from end to start and append each character to a new string.
Alternatively, use built-in functions like reverse() or slicing to reverse the string.
Handle special characters and numbers while reversing the string.
Ensure to consider the constraints on the length of the string and number of test cases.
Q3. 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 non-z...read more
Rearrange an array such that all zero elements appear at the beginning, followed by non-zero elements, maintaining relative order of non-zero elements.
Iterate through the array and maintain two pointers - one for the next position to place a zero and one for the next non-zero element.
Swap the elements at these pointers until all zeros are moved to the left and non-zero elements are in their relative order.
Time complexity: O(N), Space complexity: O(1)
Example: Input: [1, 1, 0, ...read more
Q4. MergeSort Linked List Problem Statement
You are given a Singly Linked List of integers. Your task is to sort the list using the 'Merge Sort' algorithm.
Input:
The input consists of a single line containing the ...read more
Sort a Singly Linked List using Merge Sort algorithm.
Implement the Merge Sort algorithm for linked lists.
Divide the list into two halves, sort each half recursively, and then merge them.
Use a fast and slow pointer to find the middle of the list for splitting.
Handle the base cases of empty list or single node list.
Example: Input: 4 3 2 1 -1, Output: 1 2 3 4
SQL query to find the second highest salary from a table
Use the MAX() function to find the highest salary
Use the NOT IN operator to exclude the highest salary from the results
Order the salaries in descending order and limit the result to 1
Q6. 5 dsa array string
Implement a data structure for storing and manipulating an array of strings.
Use a dynamic array to store the strings.
Implement functions for adding, removing, and accessing strings in the array.
Consider memory management and resizing the array as needed.
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