Walmart Software Engineer Interview Questions and Answers

The sliding window technique efficiently solves problems involving contiguous subarrays or substrings.

• 1. Definition: A sliding window is a subarray or substring that moves over the input data to find a solution.

• 2. Fixed-size window: For problems requiring a fixed number of elements, maintain a window of that size. Example: Find the maximum sum of any 3 consecutive elements in an array.

• 3. Dynamic-size window: Adjus...read more

Use recursion to print n natural numbers in C++ without semicolon.

• Define a function to print natural numbers recursively.

• Call the function inside main function with n as argument.

• Base case: if n is less than 1, return.

• Print n and call the function with n-1 as argument.

SAP security refers to the measures taken to protect SAP systems and data from unauthorized access and misuse.

• SAP security involves setting up user roles and authorizations to control access to sensitive data

• It includes implementing encryption, authentication, and audit trails to ensure data integrity

• Regular security assessments and updates are necessary to protect against vulnerabilities

• Examples of SAP security t...read more

Implement a key-value structure

• Use a hashmap or dictionary data structure to store key-value pairs

• Implement methods to add, retrieve, update, and delete key-value pairs

• Consider handling collisions and implementing a hashing function

• Example: HashMap<String, Integer> keyValueMap = new HashMap<>()

Find the longest substring in an array of strings.

• Iterate through each string and compare with all other strings to find common substrings.

• Use a hash table to keep track of the frequency of each substring.

• Return the substring with the highest frequency.

The for loop will run indefinitely without any condition to terminate it.

• The loop will continue executing until it is manually interrupted or the program crashes.

• This can lead to a program becoming unresponsive or consuming excessive resources.

• It is important to always include a condition in a for loop to control its execution.