30+ Seamless Speciality Infra Projects Interview Questions and Answers

Tech Lead interview questions on requirement analysis, microservices, AWS CDK, auto-scaling, and ElasticSearch.

• Requirement analysis to production deployment flow and tools used

• Auto-scaling in microservices architecture

• Difference between microservices and serverless

• Choosing between monolith and microservices for an enterprise-level application

• Importance of writing documentation, manuals, and tech wiki

• Writing a lambda function using AWS CDK and setting properties for CDK

• Auto-sc...read more

LOD, Pie Chart, Dual Axis Chart in Tableau

• LOD (Level of Detail) is used to compute aggregations that are not at the level of detail of the visualization

• Pie Chart is used to show the proportion of different categories in a dataset

• Dual Axis Chart is used to compare two measures with different scales on the same chart

• To create LOD, use curly braces and specify the level of detail

• To create Pie Chart, drag the dimension to the Columns/Rows shelf and the measure to the Marks card

• To...read more

Swift & Objective-C are programming languages used for iOS development. Tableview in SwiftUI uses List view. RxSwift is a reactive programming framework. Optional & Generics are Swift features. Protocol Composition is combining multiple protocols.

• Swift & Objective-C are used for iOS development

• Tableview in SwiftUI uses List view

• RxSwift is a reactive programming framework for Swift

• Optional allows variables to have a 'no value' state

• Generics allow you to write flexible, reusabl...read more

Program to fetch and display data from API in React

• Use fetch or axios to make API calls in React

• Set up state to store the fetched data

• Render the data in the component using JSX

Some new features of React JS include Hooks, Context API, Suspense, and React.lazy.

• Introduction of Hooks for state and lifecycle management

• Context API for global state management

• Suspense for handling loading states in components

• React.lazy for code splitting and lazy loading components

Functional and class components are two types of components in React for building user interfaces.

• Functional components are simple functions that take props as input and return JSX elements.

• Class components are ES6 classes that extend React.Component and have a render method.

• Functional components are easier to read and test, while class components have more features like state and lifecycle methods.

• Example of functional component: const MyComponent = (props) =>

  {props.text}
  ;

• E...read more

HOC stands for Higher Order Component in React. It is a pattern where a function takes a component and returns a new component.

• HOC allows code reuse, logic abstraction, and props manipulation in React components.

• Example: WithAuthentication HOC can conditionally render a component based on user authentication status.

• Example: WithLoader HOC can display a loading spinner while fetching data for a component.

Time complexity refers to the amount of time taken by an algorithm to run, while space complexity refers to the amount of memory used by an algorithm.

• Time complexity is measured by the number of operations an algorithm performs, while space complexity is measured by the amount of memory an algorithm uses.

• An algorithm with a time complexity of O(n) will take longer to run as the input size increases, while an algorithm with a space complexity of O(n) will use more memory as th...read more

Use dynamic programming to find the longest palindrome substring in a given string.

• Iterate through each character in the string and expand around it to find palindromes

• Store the length of each palindrome found and return the longest one

• Handle both odd and even length palindromes

Merge sort is a divide and conquer algorithm. Best for large data sets. Code: https://bit.ly/3jJ5J5z

• Divide the array into two halves

• Sort each half recursively

• Merge the sorted halves

• Best for large data sets

• Code: https://bit.ly/3jJ5J5z

Code for ranking functions

• Use a sorting algorithm to sort the data based on a specific criterion

• Assign a rank to each element based on its position in the sorted list

• Handle ties by assigning the same rank to tied elements

• Consider using built-in functions or libraries for ranking if available

HashMap is not thread-safe while ConcurrentHashMap is thread-safe.

• HashMap is not thread-safe and can lead to ConcurrentModificationException if modified during iteration.

• ConcurrentHashMap allows concurrent read and write operations without the need for external synchronization.

• ConcurrentHashMap achieves thread-safety by dividing the map into segments, allowing multiple threads to operate on different segments concurrently.

Arrays have fixed size, while ArrayLists can dynamically resize. ArrayLists are part of Java Collections framework.

• Arrays have a fixed size, while ArrayLists can dynamically resize.

• Arrays can hold primitive data types and objects, while ArrayLists can only hold objects.

• Arrays use square brackets [] for declaration, while ArrayLists use angle brackets <>.

• Arrays are faster than ArrayLists for accessing elements.

• Example: int[] arr = new int[5]; ArrayList list = new ArrayList<>()...read more

Exploring multiple domains helps in gaining a broader perspective and understanding of various industries.

• Research and read about different industries and their trends

• Attend conferences and events related to different domains

• Network with professionals from various industries

• Take online courses or certifications to gain knowledge

• Try freelancing or internships in different industries

• Examples: Marketing, Advertising, Film, Gaming, Education, Healthcare, Finance, etc.

Forward and backward chaining are two types of reasoning used in artificial intelligence and expert systems.

• Forward chaining starts with the available data and uses rules to infer new conclusions.

• Backward chaining starts with a goal and works backwards to find the data and rules needed to support that goal.

• Forward chaining is used in rule-based systems, while backward chaining is used in goal-based systems.

• Examples of forward chaining include diagnostic systems and decision s...read more

ORM is Object-Relational Mapping, entity class represents a database table, controller layer handles HTTP requests, REST is an architectural style, Spring Boot is a Java framework, Hibernate is an ORM tool.

• ORM (Object-Relational Mapping) is a technique to map objects to database tables and vice versa.

• Entity class represents a database table and its fields as Java objects.

• Controller layer in a web application handles HTTP requests and routes them to appropriate methods.

• REST (R...read more

Python program to find smallest integer greater than square root of a given number.

• Use math module to calculate square root of the given number.

• Use math.ceil() function to round up the square root to the nearest integer.

• Add 1 to the rounded up square root to get the smallest integer greater than square root.

SQL query to list employees with third highest salary

• Use the 'ROW_NUMBER()' function to assign a rank to each employee based on salary

• Filter the results to only include employees with a rank of 3

Implement a data structure that supports insert, delete, and getRandom operations in O(1) time complexity.

• Use a hashmap to store the mapping of values to their indices in an array for O(1) lookup during delete operation.

• For getRandom operation, generate a random index within the size of the array and return the value at that index.

• To achieve O(1) time complexity for all operations, use a combination of hashmap and array data structures.

Constraints are used to restrict user input while Declare triggers are used to automate actions based on certain events.

• Constraints are used to validate user input and ensure it meets certain criteria.

• Declare triggers are used to automate actions based on certain events, such as when a new record is created or updated.

• Constraints are defined at the property level while Declare triggers are defined at the class level.

• Constraints can be used to enforce business rules and data i...read more

A traveling spring structure in a matrix is a pattern where a spring-like structure moves through the matrix.

• The structure moves in a zigzag pattern through the matrix

• The structure can be used to traverse a matrix and visit all its elements

• The structure can be implemented using a combination of loops and conditional statements

• Example: Given a matrix of size n x m, start at the top-left corner and traverse the matrix using the traveling spring structure until all elements have...read more

I will check the application status by examining logs, monitoring tools, and performing health checks.

• Check application logs for any error messages or warnings

• Use monitoring tools like Prometheus or Grafana to check application metrics

• Perform health checks on the application to ensure it is responding properly

• Verify network connectivity to the application server

I manage performance management through setting clear goals, providing regular feedback, conducting performance reviews, and offering development opportunities.

• Set clear and achievable goals for employees

• Provide regular feedback on performance

• Conduct performance reviews to assess progress and areas for improvement

• Offer development opportunities for growth and skill enhancement

Prioritize and address client issues promptly to ensure customer satisfaction.

• Acknowledge the priority issue and gather all necessary information from the client.

• Assess the impact of the issue on the client's operations and prioritize based on severity.

• Communicate with the client to set expectations and provide regular updates on the resolution process.

• Allocate resources and escalate to higher levels of support if needed to expedite resolution.

• Follow up with the client after ...read more

Stemming and lemmatization are techniques used in natural language processing to reduce words to their base or root form.

• Stemming is the process of reducing words to their base or root form by removing suffixes.

• Example: 'running' becomes 'run' after stemming.

• Lemmatization is the process of reducing words to their base or root form while still ensuring that the reduced form belongs to the language.

• Example: 'better' becomes 'good' after lemmatization.

The 4 pillars of OOP are Abstraction, Encapsulation, Inheritance, and Polymorphism.

• Abstraction: Hiding implementation details and showing only necessary information.

• Encapsulation: Binding data and functions that manipulate it together in a single unit.

• Inheritance: Creating new classes from existing ones, inheriting their properties and methods.

• Polymorphism: Ability of objects to take on multiple forms or behaviors.

To find the third highest salary in a SQL table, use the 'SELECT DISTINCT' statement with 'ORDER BY' and 'LIMIT'.

• Use 'SELECT DISTINCT' to avoid duplicates

• Order the salaries in descending order using 'ORDER BY'

• Use 'LIMIT 2,1' to skip the first two highest salaries and retrieve the third highest salary

Started as a junior system administrator, gained experience through various roles and projects, now a seasoned professional.

• Started as a junior system administrator, handling basic tasks such as user account management and system monitoring

• Progressed to more complex responsibilities like server maintenance, network troubleshooting, and security management

• Participated in various projects such as system upgrades, migrations, and implementations

• Continuously learning and adapting...read more

日本語で一文で表現することができます。

• こんにちは。- Hello.

• お元気ですか？- How are you?

• ありがとう。- Thank you.

• ごめんなさい。- I'm sorry.

• おはようございます。- Good morning.

Use cases on banking and lending involve scenarios where customers apply for loans, manage their finances, and make transactions.

• Loan application process for individuals and businesses

• Credit scoring and risk assessment for loan approvals

• Online banking services for account management

• Mobile payment solutions for convenient transactions

• Fraud detection and prevention in financial transactions

The Indian GCC market refers to the business environment and opportunities in the Gulf Cooperation Council countries for Indian companies.

• The Indian GCC market is a key focus for many Indian companies looking to expand internationally.

• Understanding the cultural nuances, business practices, and regulations in GCC countries is crucial for success.

• Key industries in the Indian GCC market include construction, healthcare, IT, and retail.

• Examples of successful Indian companies in t...read more

Shallow copy only copies the reference of an object, while deep copy creates a new object with new references.

• Shallow copy creates a new object but references the same nested objects.

• Deep copy creates a new object and recursively copies all nested objects.

• Shallow copy can be achieved using Object.assign or spread operator.

• Deep copy can be achieved using JSON.parse(JSON.stringify(obj)).

String operations in Tosca Automation involve manipulating and validating strings in test scripts.

• Use functions like 'contains', 'startsWith', 'endsWith' for string validation

• Use 'concatenate' function to combine multiple strings

• Use 'substring' function to extract a portion of a string

Lending involves providing money to individuals or businesses with the expectation of repayment with interest.

• Lenders assess the creditworthiness of borrowers before approving a loan.

• Interest rates are determined based on factors such as credit score, loan amount, and repayment term.

• Collateral may be required for secured loans to mitigate the lender's risk.

• Repayment schedules vary, with options for fixed or variable interest rates.

• Defaulting on a loan can result in penalties,...read more