LogicRain Technologies Salesforce Developer Interview Questions and Answers

Api based questions where to post or get fetch data

Q1. Dp questions were asked
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Q2. Sql basic questions were asked
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Q1. Why has Salesforce introduced LWCs over Aura components?
Ans. 
Salesforce introduced LWCs for better performance, reusability, and modern web standards.
• LWCs offer better performance due to their lightweight nature and optimized rendering.

• LWCs promote reusability through modular design and encapsulation of functionality.

• LWCs align with modern web standards like ES6, Shadow DOM, and Web Components, making them more future-proof.

• Aura components are based on Aura framework, which has ...read more
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Q2. What are the differences in events in LWCs compared to Aura components?
Ans. 
Events in LWCs differ from Aura components in terms of syntax, propagation, and handling.
• In LWCs, events are dispatched using the standard DOM event model, while in Aura components, events are handled using the Aura event system.

• LWC events use standard JavaScript event handling methods like addEventListener and dispatchEvent, while Aura events use $A.get('e.namespace:eventName').fire().

• LWC events do not bubble up the D...read more
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Q3. Why are application events avoided?
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Application events are avoided in Salesforce development due to their potential impact on performance and complexity.
• Application events can lead to tight coupling between components, making the code harder to maintain and debug.

• They can also result in excessive event firing, causing performance issues.

• Using component events or other communication patterns like pub-sub can be more efficient and manageable.

• Avoiding appli...read more
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Find the count of contacts associated to an account which have unique email Ids

Q1. What are the integration frameworks that you have worked with?
Ans. 
I have worked with integration frameworks such as MuleSoft, Apache Camel, and Dell Boomi.
• MuleSoft

• Apache Camel

• Dell Boomi
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Q2. What are external objects and how can you use them with a scenario?
Ans. 
External objects are virtual objects that allow you to access data stored outside Salesforce.
• External objects represent data from an external system in Salesforce without copying the data into Salesforce.

• They are defined using external data sources and external data objects.

• You can use them to integrate data from external systems like databases, ERP systems, or web services.

• External objects allow you to view and intera...read more
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Q1. Questions on Apex and LWC
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Trigger question on parent child relationship

Batch class and trigger

Q1. Project Architecture
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Q1. Informatica tech questions
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DP graphs strings it was good

Q1. Reverse a linkded list
Ans. 
Reverse a linked list by changing the direction of pointers
• Start with three pointers: current, previous, and next

• Iterate through the list, updating pointers to reverse the direction

• Return the new head of the reversed list
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Q2. Print fibonacci series
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The Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones.
• Start with two variables initialized to 0 and 1

• Loop through desired number of iterations, adding the previous two numbers to get the next number

• Print or store each number in the series
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Q1. Dependency injection
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Q2. What are oops concepts
Ans. 
Object-oriented programming concepts that focus on data encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: bundling data and methods that operate on the data into a single unit (class)

• Inheritance: ability of a class to inherit properties and behavior from another class

• Polymorphism: ability to present the same interface for different data types

• Abstraction: hiding the complex implementation details
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Q1. Why do you want to switch
Ans. 
I want to switch to explore new technologies and challenges in a different industry.
• Interested in learning new skills and technologies

• Seeking new challenges and opportunities for growth

• Want to explore different industry perspectives
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Q2. Salry expectations
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Q1. Question on oop concepts
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Q2. Coding questions
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It was just a typical logical reasoning and aptitude MCQ test

There were 2 coding questions and you can select any language for solving it. The test was online

Q1. He simply asked me which coding language I prefer and why ? (Mine was C++)
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Q2. Difference between C and C++?
Ans. 
C is a procedural programming language while C++ is an object-oriented programming language.
• C is a procedural programming language, while C++ supports both procedural and object-oriented programming.

• C does not have classes and objects, while C++ does.

• C does not support function overloading, while C++ does.

• C does not have exception handling, while C++ does.

• C does not have namespaces, while C++ does.
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Q3. What is Object oriented programming?
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Object oriented programming is a programming paradigm based on the concept of objects, which can contain data and code.
• Objects are instances of classes, which define the structure and behavior of the objects.

• Encapsulation, inheritance, and polymorphism are key principles of object oriented programming.

• Example: Inheritance allows a class to inherit properties and methods from another class.

• Example: Encapsulation hides t...read more
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Q4. What are the 4 pillars of OOPs?
Ans. 
Encapsulation, Inheritance, Polymorphism, Abstraction
• Encapsulation: Bundling data and methods that operate on the data into a single unit

• Inheritance: Ability of a class to inherit properties and behavior from another class

• Polymorphism: Ability to present the same interface for different data types

• Abstraction: Hiding the complex implementation details and showing only the necessary features
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Q5. Write down code implementing all 4 pillars of OOPs.
Ans. 
Code implementing all 4 pillars of OOPs
• Encapsulation: Encapsulate data within classes and provide public methods to access and modify the data.

• Inheritance: Create a hierarchy of classes where child classes inherit attributes and methods from parent classes.

• Polymorphism: Allow objects of different classes to be treated as objects of a common superclass through method overriding and overloading.

• Abstraction: Hide complex ...read more
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Q6. Difference between Stacks and Queues?
Ans. 
Stacks are Last In First Out (LIFO) data structures, while Queues are First In First Out (FIFO) data structures.
• Stacks: Elements are added and removed from the same end, like a stack of plates. Example: Undo feature in text editors.

• Queues: Elements are added at the rear and removed from the front, like a line of people waiting. Example: Print queue in a printer.
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Q7. Write a code to find the 2nd largest element in an array.
Ans. 
Code to find the 2nd largest element in an array
• Sort the array in descending order and return the element at index 1

• Iterate through the array and keep track of the two largest elements

• Handle edge cases like arrays with less than 2 elements
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Q8. What is merge sort and its Algorithm ?
Ans. 
Merge sort is a divide and conquer algorithm that divides the input array into two halves, sorts them recursively, and then merges them.
• Divide the input array into two halves

• Recursively sort each half

• Merge the sorted halves back together
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Q9. What is DBMS and RDBMS and difference between them?
Ans. 
DBMS stands for Database Management System, while RDBMS stands for Relational Database Management System. RDBMS is a type of DBMS.
• DBMS is a software system that allows users to define, create, maintain and control access to the database.

• RDBMS is a type of DBMS that stores data in a structured format using tables with rows and columns.

• RDBMS enforces a set of rules called ACID properties to ensure data integrity, while D...read more
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Q10. What is SQL and who its different from mySQL?
Ans. 
SQL is a standard language for managing databases, while MySQL is a specific open-source relational database management system.
• SQL stands for Structured Query Language and is used to communicate with databases.

• SQL is a standard language that can be used with various database management systems.

• MySQL is a specific open-source relational database management system that uses SQL.

• MySQL is one of the most popular database m...read more
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Q11. Difference between Delete, Truncate and Drop?
Ans. 
Delete removes specific rows from a table, Truncate removes all rows from a table, and Drop removes the table itself.
• Delete is a DML command that removes specific rows from a table based on a condition.

• Truncate is a DDL command that removes all rows from a table but keeps the table structure.

• Drop is a DDL command that removes the entire table along with its structure.
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Q12. Different kind of Joins in DBMS ?
Ans. 
Different types of joins in DBMS include inner join, outer join, left join, right join, and full join.
• Inner join: Returns rows when there is a match in both tables.

• Outer join: Returns all rows from one table and only matching rows from the other table.

• Left join: Returns all rows from the left table and the matched rows from the right table.

• Right join: Returns all rows from the right table and the matched rows from the ...read more
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Q13. And at last 2 to 3 SQL queries. They were not that hard, Just basic queries.
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