Persistent Systems Interview Questions, Process, and Tips

Q1. Jwt token, dependency injection in dotnet core, mocking
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Q2. Authentication and Authorization,stored procedure optimization,remove duplicate character from string
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Q3. Abstract class implementation and solid principle
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It was very good and technical questions was basic.

Q1. What us sdlc? Use of it.
Ans. 
SDLC stands for Software Development Life Cycle. It is a process used by software development teams to design, develop, and test high-quality software.
• SDLC involves planning, designing, coding, testing, and deployment stages.

• It helps in ensuring that the software meets the requirements and is delivered on time and within budget.

• Examples of SDLC models include Waterfall, Agile, and DevOps.

• Each stage of SDLC has specific
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Q2. What is oops? Pilars or oops.
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OOPs stands for Object-Oriented Programming. It is based on four main principles: Inheritance, Encapsulation, Abstraction, and Polymorphism.
• OOPs is a programming paradigm that focuses on objects and classes.

• The four main pillars of OOPs are Inheritance, Encapsulation, Abstraction, and Polymorphism.

• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation refers to the bundling of da...read more
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Q1. Internal Working of HashMap
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HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• To retrieve a value, the key is hashed a...read more
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Q2. Core Java Questions
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Q1. Resume shortlist
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Q1. Mostly Questions come from real-time scenarios only, interviewer taken 1 hour of my time for interview
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Q2. How to change create date while uploading the record through data loader?
Ans. 
You can change the create date while uploading records through Data Loader by enabling the 'Allow Insert' option.
• Enable 'Allow Insert' option in Data Loader settings

• Map the 'Created Date' field in the mapping file to the desired date/time value

• Ensure the user has the necessary permissions to change the create date
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Q3. How wire method works, while importing data want to add record inside wire method in Jsfile how?
Ans. 
Wire method in Salesforce is used to fetch data from Apex controller to Lightning Web Component. Adding records inside wire method in JS file involves using imperative Apex to create records.
• Use @wire decorator in Lightning Web Component JS file to call an Apex method

• Inside the wire method, use imperative Apex to create records by calling the createRecord method from the Lightning Data Service

• Pass the record data as pa
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Q4. Write a trigger on account if account already having 1 contact then user can't able to create another
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Q5. How security works in apex, let's say user don't have access on Phone field and SELECT id, Name, Phone from Account WITH_SECURITY_ENFORCED how this query works?
Ans. 
In Apex, security is enforced by default. If a user doesn't have access to a field, they won't be able to query it.
• In Apex, security is enforced by default, meaning that users can only access data they have permission to see.

• If a user doesn't have access to the Phone field in the Account object, they won't be able to query it even with WITH_SECURITY_ENFORCED.

• The SELECT id, Name, Phone from Account WITH_SECURITY_ENFORCE...read more
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