10+ SWIFT Interview Questions and Answers

Primary key uniquely identifies a record in a table, while foreign key establishes a link between two tables.

• Primary key is unique and cannot have null values

• Foreign key references the primary key of another table

• Primary key can be used to enforce entity integrity

• Foreign key can be used to enforce referential integrity

Monkey patching is a technique in programming where existing code is changed or extended at runtime.

• Monkey patching is commonly used in dynamic languages like Python and Ruby.

• It involves modifying or adding new methods to existing classes or modules.

• Monkey patching can be useful for fixing bugs or adding new functionality without modifying the original source code.

OOPs (Object-Oriented Programming) is a programming paradigm based on the concept of objects, which can contain data and code.

• OOPs focuses on creating objects that interact with each other to solve a problem

• Key concepts include encapsulation, inheritance, polymorphism, and abstraction

• Encapsulation involves bundling data and methods that operate on the data into a single unit

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

• Polymorphism allows obj...read more

The question is about basic Python concepts.

• Python is a high-level programming language known for its simplicity and readability.

• Basic Python concepts include data types, variables, loops, conditionals, functions, and modules.

• Python uses indentation to define code blocks, unlike other languages that use curly braces.

Interfaces without methods can be implemented using type aliases.

• Type aliases can be used to define a shape of an object without any methods.

• Type aliases can be used to define a shape of an object with optional properties.

• Type aliases can be used to define a shape of an object with readonly properties.

• Type aliases can be used to define a shape of an object with union types.

Delete duplicates in a query and find third highest salary.

• Use the DISTINCT keyword in the query to eliminate duplicates.

• Order the salaries in descending order and use the LIMIT clause to get the third highest salary.

Solution architecture and cost/effort estimates are influenced by various factors.

• Business requirements and objectives

• Technology stack and infrastructure

• Scope and complexity of the project

• Availability of resources and skills

• Potential risks and mitigation strategies

• Timeline and deadlines

• Regulatory and compliance requirements

• Market trends and competition

• Client budget and expectations

The best tools for development process are evaluated based on their features, compatibility, cost, and user feedback.

• Identify the requirements of the development process

• Research and compare available tools

• Consider the features, compatibility, and cost of each tool

• Read user reviews and feedback

• Test the shortlisted tools before finalizing

To manage and control project team and client, effective communication, clear expectations, and regular updates are necessary.

• Establish clear goals and expectations with the team and client

• Communicate regularly with the team and client to ensure everyone is on the same page

• Provide feedback and recognition to team members to keep them motivated

• Address any issues or conflicts promptly and professionally

• Use project management tools to track progress and identify potential issues...read more

Sales focuses on selling products or services to customers, while marketing involves creating awareness and interest in those products or services.

• Sales involves direct interaction with customers to close deals

• Marketing involves creating strategies to attract and retain customers

• Sales is more focused on immediate revenue generation

• Marketing is more focused on long-term brand building and customer relationships

• Sales is typically more transactional, while marketing is more stra...read more

The order to cash process flow for a media business involves receiving orders, creating invoices, and receiving payments.

• Receive orders from customers

• Create invoices based on the orders

• Deliver the products or services to the customers

• Receive payments from the customers

• Record the payments and update the accounts receivable

• Reconcile the payments with the invoices

• Generate reports to track the order to cash process

Observables are a way to handle asynchronous data streams in Angular.

• Observables are similar to Promises, but can emit multiple values over time.

• They can be created using the RxJS library.

• They can be used for handling user input, HTTP requests, and other asynchronous operations.

• Operators can be used to transform, filter, and combine observables.

• Subscriptions are used to listen for emitted values and handle errors and completion.

Nihilent is a global consulting and solutions integration company.

• Nihilent provides services in the areas of digital transformation, business process outsourcing, and technology solutions.

• They offer consulting services to help organizations improve their business processes and achieve their goals.

• Nihilent has worked with clients in various industries such as healthcare, financial services, and telecommunications.

I approach architecture design by focusing on scalability, performance, security, and maintainability.

• Start by understanding the requirements and constraints of the project

• Identify key components and their interactions

• Consider scalability by designing for future growth

• Optimize performance through efficient algorithms and technologies

• Implement security measures to protect data and systems

• Prioritize maintainability for easier updates and enhancements

Gradient descent is an optimization algorithm used to minimize a function by iteratively moving in the direction of steepest descent.

• Gradient descent is used to find the minimum of a function by iteratively updating the parameters in the opposite direction of the gradient.

• It involves calculating the gradient of the loss function with respect to the parameters and updating the parameters accordingly.

• The learning rate determines the size of the steps taken in the parameter spac...read more

Union combines and removes duplicates, Union All combines all rows including duplicates.

• Union removes duplicates, Union All includes duplicates

• Union is slower than Union All as it has to remove duplicates

• Union requires the same number of columns in both queries

• Union All does not require the same number of columns in both queries