Random Trees Senior Software Engineer Interview Questions and Answers

1 hour interview for data structure coding

Q1. Basic Js Question and Reactjs Questions
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Coding logical thinking

Q1. Linux, logical thinking
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Q2. Technical related to coding - DSA
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Q1. Techincal coding
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Q2. Past exerience based questions
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I had to evaluate a software and let them understand where this software could be implemented and the pros and cons of the software.

Q1. There was simple DSA question ,
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Q1. Different trigger pattern
Ans. 
Different trigger patterns are used in software development to initiate actions based on specific events.
• Triggers can be based on time, user input, system events, etc.

• Examples include event-driven programming, polling triggers, and scheduled triggers.
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Q2. Scenario based: trigger make one callout per record and 1000 record are updated how will you handle it?
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Q3. Update account with count of contact.
Ans. 
Update account with count of contact involves updating the account with the number of contacts associated with it.
• Create a function to update the account with the count of contacts

• Retrieve the contacts associated with the account

• Calculate the count of contacts

• Update the account with the count of contacts
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Q4. How do you share record using owd
Ans. 
Sharing records using Organization Wide Defaults (OWD) in Salesforce
• Set OWD to Public Read Only to allow all users to view records but only the owner can edit

• Set OWD to Private to restrict access to only the record owner and users above in the role hierarchy

• Use Sharing Rules to extend access to specific groups of users

• Use Manual Sharing to grant access to individual users or groups on a case-by-case basis
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Q1. Difference between with sharing, without sharing and inherited sharing.
Ans. 
with sharing enforces sharing rules, without sharing doesn't enforce sharing rules, inherited sharing uses the sharing rules of the parent class
• with sharing keyword enforces sharing rules specified in the organization-wide defaults

• without sharing keyword doesn't enforce sharing rules, allowing access to all records

• inherited sharing keyword uses the sharing rules of the parent class
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Q2. Explain async process in Salesforce
Ans. 
Async process in Salesforce allows for executing tasks in the background without blocking the main thread.
• Async processes in Salesforce are used to perform time-consuming operations without affecting the user experience.

• Apex provides @future annotation for asynchronous processing.

• Batch Apex is used for processing large data sets asynchronously.

• Queueable Apex allows chaining of asynchronous jobs.

• Platform Events can be u
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Q1. Create table view for different profile and can have more then 60 column. How to implement dynamically
Ans. 
Use dynamic SQL to create table view with more than 60 columns for different profiles
• Use dynamic SQL to generate the CREATE VIEW statement based on the profile requirements

• Iterate through the profile columns and add them to the CREATE VIEW statement dynamically

• Consider using a loop or a mapping function to handle the large number of columns efficiently
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Q2. How to handle recursion
Ans. 
Recursion is a programming technique where a function calls itself in order to solve a problem.
• Identify the base case to stop the recursion

• Ensure the recursive call moves towards the base case

• Optimize recursion by using memoization or tail recursion

• Examples: factorial calculation, Fibonacci sequence
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Javascript basic question was asked

Q1. Email regex, angular framework
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Q2. That all the question asked
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Round duration - 60 minutes
Round difficulty - Easy

It was my first round - they asked basics of OOPS,DBMS and operating systems. Be prepared with System Design also.

Q1. DBMS Question
What are ACID properties?
Ans. 
ACID properties are a set of properties that guarantee reliability and consistency in database transactions.
• ACID stands for Atomicity, Consistency, Isolation, and Durability.

• Atomicity ensures that a transaction is treated as a single unit of work, either all of its operations are executed or none.

• Consistency ensures that a transaction brings the database from one valid state to another.

• Isolation ensures that concurrent...read more
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Q2. DBMS Question
What is a transaction?
Ans. 
A transaction is a logical unit of work that consists of multiple database operations that must be executed as a single, indivisible unit.
• A transaction ensures data consistency and integrity.

• It follows the ACID properties: Atomicity, Consistency, Isolation, and Durability.

• Transactions are used to maintain data integrity in databases.

• Examples of transactions include transferring funds between bank accounts or updating i
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Q3. DBMS Question
Difference between sql and no sql database
Ans. 
SQL databases are relational databases that use structured query language, while NoSQL databases are non-relational databases that use various data models.
• SQL databases are based on a fixed schema, while NoSQL databases are schema-less.

• SQL databases are better suited for complex queries and structured data, while NoSQL databases are better for unstructured and semi-structured data.

• SQL databases ensure ACID (Atomicity, ...read more
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Q4. OS Question
What is a semaphore ?
Ans. 
A semaphore is a synchronization object that controls access to a shared resource through the use of a counter.
• Semaphores are used to manage concurrent access to shared resources in multi-threaded or multi-process environments.

• They can be used to limit the number of threads or processes that can access a resource simultaneously.

• Semaphores can have two types: counting semaphores and binary semaphores.

• Counting semaphores...read more
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Q5. OOPS Question
How to achieve multitasking in Java ?
Ans. 
Multitasking in Java can be achieved using threads.
• Create multiple threads to execute tasks concurrently.

• Use the Thread class or the Runnable interface to define the tasks.

• Use synchronization mechanisms like locks or semaphores to coordinate access to shared resources.

• Java provides built-in support for multitasking with the Thread class and the Executor framework.

• Example: creating two threads to perform different tasks
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Q6. DBMS Question
Design Schema for restaurant apps like Zomato.
Ans. 
Design a schema for a restaurant app like Zomato.
• Create tables for restaurants, users, reviews, and orders

• Include columns for restaurant details like name, address, cuisine type

• Include columns for user details like name, email, and password

• Link reviews to restaurants and users

• Link orders to restaurants and users

• Consider additional tables for menu items, categories, and ratings
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