NTT Data Senior Developer Interview Questions and Answers

Q1. Sliding Window find the subarray with sum equal to k
Ans. 
Using sliding window technique to find subarray with sum equal to k.
• Initialize two pointers at the start of the array.

• Move the right pointer to expand the window until the sum is greater than or equal to k.

• Move the left pointer to shrink the window if the sum exceeds k.

• Repeat until the end of the array is reached.

• Example: Input array [1, 4, 20, 3, 10, 5], k=33. Output: [20, 3, 10].
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Q1. Difference between custom setting and custom metadata
Ans. 
Custom settings are org-specific, while custom metadata can be deployed across orgs.
• Custom settings are hierarchical and can be accessed using a hierarchy custom setting type

• Custom metadata is deployable and can be used in managed packages

• Custom settings are stored in the application cache, while custom metadata is stored in the metadata cache
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Q2. Difference between profile and role
Ans. 
Profile is a summary of a person's skills and experience, while role is the specific job or position they hold within an organization.
• Profile is a broader overview of a person's qualifications and background.

• Role is a specific set of responsibilities and tasks assigned to an individual within a company.

• Profiles can include education, work experience, skills, and achievements.

• Roles can be defined by job titles such as S...read more
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Easy exam sample available on youtube

Q1. What are step functions.
Ans. 
Step functions are a type of serverless function that allow you to create workflows by chaining multiple functions together.
• Step functions are used to coordinate multiple AWS services into serverless workflows.

• They allow you to define a series of steps in a workflow, with each step being a separate function.

• You can use step functions to handle complex business logic, long-running processes, and error handling.

• Step func...read more
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Q2. How to scale lambdas
Ans. 
Scaling lambdas involves optimizing memory usage, increasing concurrency, and managing dependencies.
• Optimize memory usage by reducing unnecessary variables and objects

• Increase concurrency by using asynchronous programming and parallel processing

• Manage dependencies by breaking down functions into smaller, more modular components

• Consider using AWS Lambda Provisioned Concurrency for consistent performance
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Q1. How did you handled a difficult collegelue
Ans. 
I addressed the issue directly and professionally, seeking to understand their perspective and find common ground.
• Approached the colleague privately to discuss the issue

• Listened actively to their concerns and perspective

• Sought to find common ground and reach a resolution

• Maintained professionalism and respect throughout the conversation
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Q1. Core JavaScript concept
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Q2. Write an example for the closure
Ans. 
A closure is a function that has access to its own scope, as well as the outer scope in which it was defined.
• A closure can access variables from its outer function even after the outer function has finished executing.

• Closures are commonly used in event handlers, callbacks, and asynchronous code.

• Example: const outerFunction = () => { const outerVar = 'I am outer'; return () => { console.log(outerVar); }; }; const innerF...read more
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Q3. Diffrence between Normal and Arrow Fuction and its example
Ans. 
Arrow functions are concise syntax for writing functions in JavaScript, compared to normal functions.
• Arrow functions do not have their own 'this' keyword, they inherit it from the parent scope.

• Arrow functions do not have 'arguments' object.

• Arrow functions cannot be used as constructors.

• Arrow functions are more concise and easier to read compared to normal functions.
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Q4. React States and Props, Hook, Life cycle method
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Sample code round to implement the weather API

Q1. Discussion about salary package
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Q1. Explain oops concepts
Ans. 
Object-oriented programming concepts like inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

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

• Abstraction: Hiding the complex implementation details and showing only the ne
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Q2. Explain solid principles
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SOLID principles are a set of five design principles that help developers create more maintainable and scalable software.
• Single Responsibility Principle (SRP) - A class should have only one reason to change.

• Open/Closed Principle (OCP) - Software entities should be open for extension but closed for modification.

• Liskov Substitution Principle (LSP) - Objects of a superclass should be replaceable with objects of its subcla...read more
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