Salesforce Mts Software Engineer Interview Questions, Process, and Tips

Two medium level question in 75 minutes

Q1. Return k most frequent string from an array of strings
Ans. 
Return k most frequent strings from an array of strings
• Use a hashmap to store the frequency of each string in the array

• Sort the hashmap by frequency in descending order

• Return the first k keys from the sorted hashmap
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Technical round- Hackerank Problem

Q1. Coding medium and easy problems for Leetcode,
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Q2. More of a scenario based questions like whatyou will do if you have a confict with your developer
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Q3. How will you lead your team
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Q1. Java, API, Testing related, Selenium, Scenario based question
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Q1. What is java and how to slove concurrency error
Ans. 
Java is a popular programming language used for developing various applications. Concurrency errors occur when multiple threads access shared resources simultaneously.
• Java is a high-level, object-oriented programming language known for its platform independence.

• Concurrency errors in Java can be solved using synchronization mechanisms like synchronized blocks, locks, and atomic variables.

• Examples of solving concurrency ...read more
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Q2. What is null pointer exception
Ans. 
A null pointer exception occurs when a program tries to access a memory address that is null or invalid.
• Occurs in programming languages like Java when trying to access an object or variable that is null

• Can be caused by not properly initializing a variable before using it

• Example: int[] arr = null; int x = arr.length; // This will throw a null pointer exception
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Medium leet code data structures and algorithms

Q1. Word break 3 leet code
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Q2. Persistent in memory key value store optimized for write heavy workloads(use: sstables,compaction )
Ans. 
Apache Cassandra is a persistent in-memory key-value store optimized for write-heavy workloads using SSTables and compaction.
• Apache Cassandra is a popular choice for write-heavy workloads due to its distributed architecture and support for SSTables.

• SSTables (Sorted String Tables) are used to store data on disk in a sorted manner, allowing for efficient read and write operations.

• Compaction in Apache Cassandra helps to m...read more
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