Navigators Software Interview Questions and Answers

Q1. Basics about PHP OOPS concept
Ans. 
PHP OOP (Object-Oriented Programming) enhances code reusability and organization through classes and objects.
• Encapsulation: Bundling data and methods that operate on the data within one unit (class). Example: class User { private $name; }

• Inheritance: Mechanism to create a new class using properties and methods of an existing class. Example: class Admin extends User {}

• Polymorphism: Ability to redefine methods in derived...read more
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Q1. Questions on dotnet and SQL
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DS code , and sorting

CRUD operaration, create project and filter with userspecif price for each login

Q1. Salary negotiation
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Q2. Why you change your current
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Q3. What is your preffered location
Ans. 
My preferred location is a vibrant city with a diverse culture and opportunities for personal and professional growth.
• I prefer a location with a strong job market and career prospects.

• I value a city with a rich cultural scene and a variety of entertainment options.

• I appreciate a place that offers a good work-life balance and access to outdoor activities.

• I prioritize a location that fosters a sense of community and prov...read more
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Q4. How soon you can join
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Q1. Functionality of ERP Modules
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Q1. Related to Functional Activities in all the ERP Modules
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Q1. Tell me about yourself.
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Q1. Difference between List and tuple
Ans. 
List is mutable, tuple is immutable in Python.
• List can be modified after creation, tuple cannot be modified

• List is defined using square brackets [], tuple using parentheses ()

• List is used for collections of items that may change, tuple for fixed collections
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Q2. Difference between shallow and deep copy
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Shallow copy creates a new object but does not duplicate nested objects, while deep copy creates a new object with all nested objects duplicated.
• Shallow copy only copies the references of nested objects, not the objects themselves.

• Deep copy creates new instances of all nested objects.

• Shallow copy is faster and more memory efficient, but changes to nested objects in the original object will reflect in the copied object.

• ...read more
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Q3. Difference between parameters vs arguments?
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Parameters are variables in a function definition, while arguments are the actual values passed to the function.
• Parameters are defined in the function signature, arguments are passed when calling the function.

• Parameters are placeholders for data, arguments are the actual data passed to the function.

• Parameters are used to initialize variables within a function, arguments are the values assigned to those variables.

• Exampl...read more
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Q4. Parse a csv file without pandas
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Parsing a csv file without pandas
• Open the csv file using the built-in open() function

• Read the file line by line using a for loop

• Split each line by the comma delimiter to get individual values
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Q5. Left join vs right join
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Left join includes all records from the left table and matching records from the right table, while right join includes all records from the right table and matching records from the left table.
• Left join keeps all records from the left table, even if there are no matches in the right table.

• Right join keeps all records from the right table, even if there are no matches in the left table.

• Example: Left join - SELECT * FRO...read more
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Q6. Database Acid properties
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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 independent of each other

• ...read more
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Q7. Difference between encapsulation and dat abstraction
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Encapsulation is the concept of bundling data and methods that operate on the data, while data abstraction is the concept of hiding the implementation details and showing only the necessary details to the user.
• Encapsulation involves bundling data and methods together in a class, providing access control to protect data from outside interference.

• Data abstraction involves hiding the implementation details and showing onl...read more
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Q1. Difference between stateless server and stateful
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Stateless server does not store any client session information, while stateful server stores client session information.
• Stateless server treats each request as an independent transaction.

• Stateful server maintains client session information between requests.

• Stateless servers are easier to scale horizontally.

• Stateful servers are more complex to scale due to session data.

• Examples: Stateless - RESTful APIs, Stateful - TCP ...read more
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Q2. What is rest api
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Q3. Difference between put and patch method
Ans. 
Put method is used to create or replace a resource, while patch method is used to update a resource partially.
• Put method is idempotent, meaning multiple identical requests will have the same effect as a single request.

• Patch method is not idempotent, as multiple identical requests may have different effects.

• Put method requires the client to send the entire updated resource, while patch method only requires the specific ...read more
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Q1. Salary expectation
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Q1. What is interceptor?
Ans. 
Interceptors are a feature in Angular that allow you to intercept and modify HTTP requests and responses.
• Interceptors can be used to add headers, handle errors, or modify requests before they are sent.

• They are implemented as services that implement the HttpInterceptor interface.

• Multiple interceptors can be chained together to perform different tasks.

• Example: Adding an authorization token to every outgoing request.
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Q2. Difference between pure pipe and impure pipe?
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Pure pipes are stateless and do not change the input data, while impure pipes can have side effects and change the input data.
• Pure pipes are faster as they only run when a pure change to the input data is detected.

• Impure pipes can have side effects like making HTTP requests or modifying the input data directly.

• Pure pipes are marked with the @Pipe decorator with pure set to true, while impure pipes have pure set to fals...read more
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