Infosys Interview Questions, Process, and Tips

Q1. Trigger on child object to update parent object (Account from Contact)
Ans. 
Use trigger on Contact to update related Account fields
• Create a trigger on Contact object

• Query for related Account record using Contact's AccountId

• Update Account fields based on Contact field changes
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Q2. Batch Apex Syntax, Features and Limitations
Ans. 
Batch Apex is used to process large amounts of data asynchronously in Salesforce.
• Batch Apex is used to handle large data volumes by breaking the processing into smaller chunks.

• It is implemented by writing a class that implements the Database.Batchable interface.

• Batch Apex has start, execute, and finish methods to control the batch processing.

• It has limitations such as a maximum of 50 million records processed per batch...read more
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Q1. Trigger to send Email to Contacts on update on Account
Ans. 
Use a trigger to send email to contacts when an account is updated
• Create a trigger on Account object

• Query for related contacts

• Send email to contacts using Apex email class
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Q2. Communication in LWC
Ans. 
Communication in LWC involves using events, properties, and methods to pass data between components.
• Use events to communicate between parent and child components

• Pass data using properties in the component hierarchy

• Call methods in child components from parent components
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Q1. Reason for Job Change
Ans. 
Seeking new challenges and growth opportunities in a dynamic environment.
• Desire to work with cutting-edge technology

• Opportunity for career advancement

• Seeking a more collaborative team environment
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Q2. Salary Expectations
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Those where basics not very hard

Q1. Oops concepts and core java including loops
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Q2. Conditional statements and overloading and overriding
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Q1. Is Java pass by value or by reference
Ans. 
Java is pass by value
• Java is pass by value, meaning a copy of the variable is passed to a method

• Changes made to the copy inside the method do not affect the original variable

• However, if the variable is an object reference, the reference is passed by value
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Q2. Difference btw string builder, and buffer
Ans. 
String Builder is not synchronized, while String Buffer is synchronized.
• String Builder is faster than String Buffer because it is not synchronized.

• String Buffer is thread-safe, while String Builder is not.

• Use String Builder when you do not need thread safety, and String Buffer when you do.
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Q3. Mysql commands and questions on database
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Q4. Tell about the last project you worked on
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Q5. Serialization Deserialization
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Q6. Singleton and prototype
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Hashmap coding problem, return Map values by passing a single input of a student.

Q1. Explain steps to create Odata service
Ans. 
Creating Odata service involves defining data model, service implementation, and service registration.
• Define data model using CDS views or ABAP dictionary objects

• Implement service using ABAP code and annotations

• Register service using transaction code /IWFND/MAINT_SERVICE
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Q2. What is BDC? Types of BDC? Steps to perform it?
Ans. 
BDC stands for Batch Data Communication. It is used to transfer data from non-SAP systems to SAP systems.
• Types of BDC: Call Transaction, Session Method, and Direct Input

• Steps to perform BDC: Recording, Processing, and Error Handling

• Example: Using Call Transaction method to automate data entry in SAP transactions
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Q1. Types of CDS views?
Ans. 
Types of CDS views include Basic, Composite, and Consumption views.
• Basic CDS views are used to define simple data models.

• Composite CDS views are used to combine multiple CDS views or database tables.

• Consumption CDS views are used to consume other CDS views or database tables.

• Examples: Basic - Define a simple data model, Composite - Combine multiple CDS views, Consumption - Consume other CDS views
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Q2. Difference between association and join
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