Carelon Global Solutions Servicenow Developer Interview Questions and Answers

Q1. Can you explain about Platform Events?
Ans. 
Platform Events are a feature in Salesforce that allow developers to deliver secure, scalable, and customizable event notifications.
• Platform Events are based on the publish-subscribe model, where publishers send events and subscribers receive them.

• They are used to communicate changes in Salesforce data or custom events within an organization.

• Developers can define custom event objects and trigger events using Apex or de...read more
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Q2. Tell me about Asynchronous Apex? Difference between Batch Apex and Queueable Apex
Ans. 
Asynchronous Apex allows you to run processes in the background, without user interaction. Batch Apex and Queueable Apex are two types of Asynchronous Apex.
• Asynchronous Apex allows you to process large amounts of data asynchronously, without impacting the user interface.

• Batch Apex is used to process large data sets that can be divided into smaller batches for processing.

• Queueable Apex allows you to submit jobs for asyn...read more
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Q3. Explain Future method? and why we need (Callout= true) along with that annotation?
Ans. 
Future method is used to run code asynchronously. Callout=true is needed to make HTTP callouts from future methods.
• Future methods are used to run code asynchronously in Salesforce.

• They are annotated with @future annotation.

• Callout=true is needed to make HTTP callouts from future methods.

• Without Callout=true, making HTTP callouts from future methods is not allowed.
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Q4. Data Security in Salesforce and types in it.
Ans. 
Data security in Salesforce involves various types of security measures to protect sensitive information.
• Salesforce provides various security features such as user authentication, data encryption, and access controls.

• Types of data security in Salesforce include object-level security, field-level security, and record-level security.

• Salesforce also offers tools like Salesforce Shield for enhanced data security and compli...read more
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Q1. Valid Anagrams was asked
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Q2. Make a pattern logic
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Create a pattern logic using arrays of strings
• Start by defining the pattern you want to create

• Use loops and conditional statements to generate the pattern

• Test the pattern with different inputs to ensure it works correctly
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Q1. Questions about internships, Projects were asked
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Find out a string is palindrome or not

Q1. ACID properties
Ans. 
ACID properties are a set of properties that guarantee database transactions are processed reliably.
• ACID stands for Atomicity, Consistency, Isolation, Durability

• Atomicity ensures that all operations in a transaction are completed successfully or none at all

• Consistency ensures that the database remains in a consistent state before and after the transaction

• Isolation ensures that transactions are executed independently of...read more
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Q2. Event loop in node js
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Event loop in Node.js manages asynchronous operations by executing callback functions when certain events occur.
• Event loop is responsible for handling I/O operations, timers, and callbacks in Node.js

• It allows Node.js to perform non-blocking operations efficiently

• Event loop continuously checks the event queue and executes callback functions when events are triggered
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Q3. Trigger and cursor
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Q4. Primary vs foreign vs unique key
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Primary key uniquely identifies a record, foreign key links to a primary key in another table, unique key ensures uniqueness of a column or set of columns.
• Primary key: uniquely identifies each record in a table (e.g. employee_id in an employees table)

• Foreign key: links to a primary key in another table to establish a relationship (e.g. department_id in an employees table linking to department_id in a departments table)

• ...read more
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Q5. Project related Questions and whats your job role in that project
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Q6. Variable hoisting in js
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Variable hoisting is a behavior in JavaScript where variable declarations are moved to the top of their scope during compilation.
• Variable declarations are hoisted to the top of their function or global scope.

• Only the declarations are hoisted, not the initializations.

• Hoisting allows you to use a variable before it is declared, but it is best practice to declare variables at the top of the scope.

• Example: console.log(myV
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Q7. Function closure in js
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Function closure in JavaScript allows a function to access variables from its outer scope even after the outer function has finished executing.
• Function closures occur when a function is defined within another function and the inner function has access to the outer function's variables.

• Closures are commonly used to create private variables and functions in JavaScript.

• Example: function outerFunction() { let outerVar = 'I...read more
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Q8. Shallow vs deep copy in js
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Shallow copy creates a new object but references the same nested objects, while deep copy creates a new object with copies of all nested objects.
• Shallow copy only copies the top-level object, not the nested objects.

• Deep copy creates new copies of all nested objects, ensuring they are independent.

• In JavaScript, shallow copy can be achieved using Object.assign or spread operator, while deep copy can be achieved using JSO
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2 coding questions on array and strings

Q1. Projects done in college
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Q2. About yourself and an introduction
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Nice company i found on earth is this

Q1. What is your current ctc and its expectation
Ans. 
My current CTC is $80,000 and I am looking for a 10-15% increase in my next role.
• Current CTC is $80,000

• Expecting a 10-15% increase in next role

• Open to negotiation based on job responsibilities and benefits
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Q1. Basic C program debugging (Find the output, and find the error) and Flowchart based questions (Finding output)
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Multiple questions on integer array manipulation, with one pattern programming

Advanced integer/character array manipulation (2D arrays)

Q1. All basic HR questions like Tell me about yourself, Previously worked projects, and then technical questions based on desired programming language, one coding question to solve and 2 aptitude questions wit...read more
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Q1. Same as previous technical HR round, but they conducted the same technical + HR round for like 5 times
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