Genesis Senior Salesforce Developer Interview Questions and Answers

Q1. Explain different types of HL7 messages
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Q2. Difference between 1C 2C 3C attribute types in DICOM
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Q1. Introduction personal,hospital intro,client deal,situation handle
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Q2. Pkg rate,revenue,client deal
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Q1. Past work experience explanation, skill set and technical requirements
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Skill test and technical knowledge evaluation

Q1. Tell me about yourself, preferred work location and expected salary.
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They ask you open Hacker Earth site and choose some random programs and ask you to complete it.

Q1. What is multi threading
Ans. 
Multi threading is the ability of a program to perform multiple tasks concurrently.
• It allows for better utilization of CPU resources

• It can improve program performance and responsiveness

• Examples include web servers handling multiple requests simultaneously and video games rendering graphics while processing user input
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Q2. What is extend keyword
Ans. 
The extend keyword is used to add properties and methods to an existing object.
• Used in JavaScript to add properties and methods to an object

• Can be used to inherit properties and methods from a parent object

• Syntax: Object.assign(target, ...sources)

• Example: const obj1 = {a: 1}; const obj2 = {b: 2}; const obj3 = {...obj1, ...obj2};
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Q3. Explain override. Why we need virtual?
Ans. 
Override is used to provide a new implementation of a method in a subclass. Virtual is needed to allow the method to be overridden.
• Override is used to change the behavior of a method in a subclass

• Virtual is used to allow the method to be overridden in a subclass

• Without virtual, a subclass cannot override a method from its parent class

• Override is used to implement polymorphism in object-oriented programming
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Q4. Write a program to sort the array and remove duplicates.
Ans. 
Program to sort and remove duplicates from an array.
• Use built-in sort() method to sort the array in ascending order.

• Loop through the sorted array and remove duplicates using filter() method.

• Return the sorted and duplicate-free array.
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Q5. What is Is Relationship and As Relationship in oops?
Ans. 
Is Relationship and As Relationship are two types of relationships in object-oriented programming.
• Is Relationship is a type of relationship where one class is a subset of another class.

• As Relationship is a type of relationship where one class is a type of another class.

• Is Relationship is denoted by a solid line with a closed arrowhead pointing towards the superclass.

• As Relationship is denoted by a dotted line with an o...read more
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Q6. What are architectural, structural, behavioural design patterns? Why we need them?
Ans. 
Architectural, structural, and behavioral design patterns are reusable solutions to common software design problems.
• Architectural patterns define the overall structure of a software system

• Structural patterns describe how objects and classes can be combined to form larger structures

• Behavioral patterns focus on communication between objects and how they operate together

• Design patterns help to improve software quality, ma...read more
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Round duration - 60 minutes
Round difficulty - Medium

30 Aptitude problems and two coding questions

Q1. 
Count Inversions Problem Statement
Given an integer array ARR of size N, your task is to find the total number of inversions that exist in the array.
An inversion is defined for a pair of integers in the...read more
Ans. 
Count the total number of inversions in an integer array.
• Iterate through the array and for each pair of elements, check if the conditions for inversion are met.

• Use a nested loop to compare each pair of elements efficiently.

• Keep a count of the inversions found and return the total count at the end.
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Q2. 
Maximum Subarray Sum Problem Statement
Given an array of integers, determine the maximum possible sum of any contiguous subarray within the array.
Example:
Input:
array = [34, -50, 42, 14, -5, 86]
Out...read more
Ans. 
Find the maximum sum of any contiguous subarray within an array of integers.
• Iterate through the array and keep track of the maximum sum of subarrays encountered so far.

• At each index, decide whether to include the current element in the subarray or start a new subarray.

• Use Kadane's algorithm to solve the problem efficiently.

• Example: For array [34, -50, 42, 14, -5, 86], the maximum subarray sum is 137.
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Round duration - 90 minutes
Round difficulty - Medium

Data structure and algorithms plus object oriented problems

Q1. 
Merge Sort Problem Statement
You are given a sequence of numbers, ARR. Your task is to return a sorted sequence of ARR in non-descending order using the Merge Sort algorithm.
Explanation:
The Merge Sort...read more
Ans. 
Implement Merge Sort algorithm to sort a sequence of numbers in non-descending order.
• Divide the input array into two halves recursively until each array has only one element.

• Merge the sorted halves to produce a completely sorted array.

• Time complexity of Merge Sort is O(n log n).

• Example: Input: [3, 1, 4, 1, 5], Output: [1, 1, 3, 4, 5]
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Q2. 
Problem Statement: Delete Node In A Linked List
Given a singly linked list of integers and a reference to a node, your task is to delete that specific node from the linked list. Each node in the linked li...read more
Ans. 
Given a singly linked list of integers and a reference to a node, delete the specified node from the linked list.
• Traverse the linked list to find the node to be deleted

• Update the pointers to skip over the node to be deleted

• Print the modified linked list after deletion
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Round duration - 60 miinutes
Round difficulty - Easy

Database questions and discussion about projects

Q1. What is a normal form in database management systems, and can you explain Boyce-Codd Normal Form (BCNF)?
Ans. 
Normal forms in database management systems help in organizing data to reduce redundancy and improve data integrity.
• Normal forms are rules used to design relational database tables to minimize redundancy and dependency.

• Boyce-Codd Normal Form (BCNF) is a stricter version of Third Normal Form (3NF) where every determinant is a candidate key.

• BCNF helps in eliminating anomalies like insertion, update, and deletion anomalie...read more
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Q2. What is the difference between the 'WHILE' keyword and the 'HAVING' keyword in SQL?
Ans. 
WHILE is used in loops to repeatedly execute a block of code, while HAVING is used in SQL queries to filter results based on aggregate functions.
• WHILE is used in programming languages like SQL to create loops for executing a block of code multiple times.

• HAVING is used in SQL queries to filter results based on aggregate functions like SUM, COUNT, AVG, etc.

• WHILE is used for iterative operations, while HAVING is used for
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It was medium to difficult level test

Q1. Questions about core subjects like oops pillars
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Q2. Questions about projects, technologies used
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Q1. Why do you want to join this
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Q2. Your previous experience and questions about your background
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