1000+ TCS Interview Questions and Answers

DRS and HA are features in vSphere that provide automated resource management and high availability for virtual machines.

• DRS (Distributed Resource Scheduler) automatically balances resources across hosts in a cluster to optimize performance and prevent overloading.

• HA (High Availability) ensures that virtual machines are automatically restarted on another host in the event of a host failure.

• Both features improve the overall reliability and availability of virtualized environme...read more

P1 incidents are handled with urgency and priority, following a defined process to minimize impact and restore service quickly.

• P1 incidents are the most critical and require immediate attention.

• The first step is to identify and classify the incident as P1.

• The incident is then escalated to the appropriate teams for investigation and resolution.

• Regular updates are provided to stakeholders to keep them informed of progress.

• Once resolved, a post-incident review is conducted to id...read more

Sort an array without using data structures

• Use a sorting algorithm like bubble sort or insertion sort

• Compare adjacent elements and swap them if necessary

• Repeat the process until the array is sorted

Improving web API performance involves optimizing code, caching, using asynchronous programming, and scaling infrastructure.

• Optimize code by reducing unnecessary database queries, using efficient algorithms, and minimizing network calls.

• Implement caching to store frequently accessed data and reduce the load on the server.

• Use asynchronous programming to handle multiple requests concurrently and improve responsiveness.

• Scale infrastructure by adding more servers, using load bala...read more

Different types of changes include standard, normal, and emergency changes. Emergency changes are those that require immediate attention.

• Standard changes are pre-approved and follow a documented process.

• Normal changes require a formal review and approval process.

• Emergency changes are unplanned and require immediate attention to prevent or resolve an incident.

• Examples of emergency changes include patching a critical security vulnerability or restoring a failed system.

There are several types of graphs, including line, bar, pie, scatter, and area graphs.

• Line graphs show trends over time.

• Bar graphs compare data between different categories.

• Pie graphs show proportions of a whole.

• Scatter graphs show the relationship between two variables.

• Area graphs show the cumulative totals over time.

Messages fail and catch in MQ and SOAP nodes based on different criteria.

• In MQ nodes, messages can fail due to issues like invalid message format, queue full, or network errors.

• MQ nodes can catch messages that fail due to these issues and route them to a designated error queue.

• In SOAP nodes, messages can fail due to issues like invalid SOAP message format or authentication errors.

• SOAP nodes can catch messages that fail due to these issues and return a SOAP fault message to th...read more

Docker is a platform for developing, shipping, and running applications in containers. AWS offers services like ECS and EKS for managing containers.

• Docker is a tool designed to make it easier to create, deploy, and run applications by using containers.

• Containers allow a developer to package up an application with all parts it needs, such as libraries and other dependencies, and ship it all out as one package.

• AWS offers services like Amazon Elastic Container Service (ECS) and ...read more

No, multiple inheritance is not possible in Java.

• Java does not support multiple inheritance of classes due to the diamond problem.

• However, multiple inheritance of interfaces is possible.

• Diamond problem occurs when two superclasses have a common method with same signature.

• Example: class A and class B both have a method void display() and class C extends A, B. Which display() method will be called?

• To avoid this, Java allows multiple inheritance of interfaces as they only contai...read more

A DBA is a database administrator who is responsible for managing and maintaining a company's database system.

• Roles include database design, security, backup and recovery, performance tuning, and troubleshooting

• Responsibilities include ensuring data integrity, availability, and accessibility

• Shift models vary depending on the company's needs, but may include on-call availability and rotating shifts

• Examples of database systems include Oracle, MySQL, and SQL Server

MongoDB is a NoSQL database with flexible schema and high scalability, but lacks transaction support.

• Advantages: flexible schema, high scalability, easy to use, supports sharding and replication

• Disadvantages: lacks transaction support, not suitable for complex transactions, limited query functionality compared to SQL databases

• Example: MongoDB is used by companies like eBay, Forbes, and The Guardian for their high scalability needs.

Answers to questions related to Docker, AWS firewall types, and ELK Stack

• To create a Docker file, start with a base image and add necessary dependencies and configurations

• AWS has two types of firewalls: Network ACLs and Security Groups

• ELK Stack is a combination of Elasticsearch, Logstash, and Kibana used for log management and analysis

A load balancer is a device or software that distributes network or application traffic across multiple servers to ensure optimal resource utilization, reliability, and performance.

• Balances incoming network or application traffic across multiple servers

• Improves reliability by distributing workload evenly

• Enhances performance by preventing any single server from becoming a bottleneck

• Can be hardware-based or software-based

• Examples include F5 BIG-IP, Citrix NetScaler, and NGINX

A step function is a mathematical function that changes abruptly from one constant value to another.

• Step functions are often used in computer science and signal processing to model discrete changes in a system.

• Examples include the Heaviside step function and the rectangular function.

• Step functions are characterized by having a constant value within specific intervals and sudden jumps at the boundaries.

Snowflake offers a unique architecture that separates storage and compute, providing scalability, flexibility, and cost-effectiveness.

• Snowflake's architecture separates storage and compute, allowing for independent scaling of each component.

• Snowflake uses virtual warehouses to allocate compute resources on-demand, optimizing performance and cost.

• Snowflake's multi-cluster shared data architecture enables seamless collaboration and data sharing across organizations.

• Snowflake's ...read more

Answering questions on Exceptions and String equality in Java

• Exceptions are errors that occur during program execution

• Java has a try-catch block to handle exceptions

• String equality can be checked using the equals() method

• The == operator checks if two strings have the same memory address

• String comparison is case-sensitive by default

Truncate removes all data from a table while delete removes specific rows.

• Truncate is faster than delete as it doesn't log individual row deletions

• Truncate resets auto-increment values while delete doesn't

• Truncate can't be undone while delete can be rolled back

• Truncate doesn't trigger any triggers while delete does

The function of an object is to store data and behavior related to a specific entity in a program.

• Objects store data in the form of properties

• Objects can have methods which define behavior

• Objects can be used to model real-world entities like cars, employees, etc.

• Objects can be instantiated from classes or created dynamically

Truncate removes all data from a table while delete removes specific rows.

• Truncate is faster than delete as it doesn't log individual row deletions

• Truncate resets auto-increment values while delete doesn't

• To truncate a table in MySQL, use the TRUNCATE TABLE statement

• Methodology used in my project was Agile

TCP three way handshake is a process used to establish a connection between a client and server in a reliable manner.

• Client sends a SYN packet to the server to initiate the connection

• Server responds with a SYN-ACK packet to acknowledge the request

• Client sends an ACK packet back to the server to confirm the connection establishment

I used Java version X.X.X

• I used Java version X.X.X for the project

• The Java version used was X.X.X

• The project was developed using Java X.X.X

Functionalities were implemented using a combination of programming languages, frameworks, and design patterns.

• Implemented functionalities using Java, Spring framework, and MVC design pattern

• Utilized RESTful APIs for communication between different modules

• Implemented asynchronous processing using message queues like RabbitMQ

• Used database technologies like MySQL for data storage and retrieval

Petrol engines draw air and fuel into the cylinder, while diesel engines only draw air.

• Petrol engines use spark plugs to ignite the fuel-air mixture, while diesel engines use compression to ignite the air-fuel mixture.

• Diesel engines are more fuel-efficient than petrol engines.

• Petrol engines are generally quieter and smoother than diesel engines.

• Diesel engines produce more torque than petrol engines, making them better for towing and hauling.

• Petrol engines are typically less e...read more

To add users in data administration, follow these steps:

• Log in to the data administration system

• Navigate to the user management section

• Click on the 'Add User' button

• Fill in the required user details such as name, email, and password

• Assign appropriate roles and permissions to the user

• Save the changes and the user will be added to the system

Liquidity ratio measures a company's ability to meet short-term obligations while solvency ratio measures long-term financial stability.

• Liquidity ratio focuses on short-term financial health while solvency ratio focuses on long-term financial health.

• Liquidity ratio measures a company's ability to pay off short-term debts while solvency ratio measures a company's ability to pay off long-term debts.

• Examples of liquidity ratios include current ratio and quick ratio while example...read more

Money, Promotion, Recognition - in that order.

• Money is important for financial stability and security.

• Promotion is important for career growth and development.

• Recognition is important for personal satisfaction and motivation.

e-PAN is a digital version of PAN card issued by the Income Tax Department of India.

• e-PAN is issued in electronic format and can be downloaded from the Income Tax Department's website.

• It is a valid proof of identity and can be used for various financial transactions.

• e-PAN is generated using Aadhaar-based e-KYC authentication.

• It is free of cost and can be obtained within minutes.

• e-PAN has a unique alphanumeric code and is valid for lifetime.

• It eliminates the need for physical ...read more

MVC folder structure includes Models, Views, and Controllers folders.

• Models folder for data-related logic

• Views folder for UI-related files

• Controllers folder for handling user input and interaction

Extension methods in MVC are static methods that allow adding new methods to existing types without modifying the original type.

• Extension methods are defined as static methods in a static class.

• They are used to extend the functionality of existing classes without modifying them.

• Extension methods are called like regular instance methods.

• Example: public static class StringExtensions { public static bool IsUpperCase(this string str) { return str.Equals(str.ToUpper()); } }

• Example...read more

Spring is a framework that provides comprehensive infrastructure support for developing Java applications. Spring Boot is a tool that simplifies the process of creating stand-alone, production-grade Spring-based applications.

• Spring is a framework that provides various modules like Spring Core, Spring MVC, Spring Security, etc.

• Spring Boot is an opinionated framework that simplifies the setup and configuration of Spring applications.

• Spring Boot includes embedded servers like To...read more

Joins in SQL are used to combine rows from two or more tables based on a related column between them.

• Joins are used to retrieve data from multiple tables based on a related column

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column

Functional interfaces are interfaces with only one abstract method, used for functional programming in Java.

• Functional interfaces can have multiple default or static methods, but only one abstract method.

• They are used in lambda expressions and method references for functional programming.

• Examples include java.lang.Runnable, java.util.Comparator, and java.util.function.Function.

Special procurement process involves unique steps or requirements for purchasing goods or services.

• Special procurement process may involve additional approvals or documentation

• It may require specific vendors or suppliers to be used

• Examples include government procurement processes or procurement for highly regulated industries such as pharmaceuticals

• May also involve bidding or negotiation processes

OOPs concepts are the principles of Object-Oriented Programming that help in designing and implementing software systems.

• Encapsulation: bundling of data and methods that operate on that data

• Inheritance: creating new classes from existing ones

• Polymorphism: ability of objects to take on multiple forms

• Abstraction: hiding implementation details and showing only functionality

• Example: A car is an object that encapsulates data like speed and methods like start() and stop()

• Example: I...read more

Delete is used to remove rows from a table, while drop is used to remove an entire table from the database.

• DELETE is a DML command, while DROP is a DDL command.

• DELETE statement is used with a WHERE clause to specify which rows to delete, while DROP statement is used to remove the entire table structure.

• DELETE does not remove the table itself, only the rows within it, while DROP removes the table along with all its data and structure.

Program to find missing element from array of strings

• Iterate through the array and store elements in a HashSet

• Iterate through another array and check if each element is present in the HashSet

• Return the element that is not present in the HashSet

EU MDR and FDA are regulatory requirements for medical devices.

• EU MDR (Medical Device Regulation) is a new regulation that replaces the Medical Device Directive (MDD) and the Active Implantable Medical Device Directive (AIMDD). It applies to all medical devices sold in the European Union.

• FDA (Food and Drug Administration) is a regulatory agency in the United States that is responsible for ensuring the safety and efficacy of medical devices sold in the US market.

• Both EU MDR an...read more

Day to day activities in Azure involve managing virtual machines, monitoring resources, deploying applications, and troubleshooting issues.

• Managing virtual machines by creating, starting, stopping, and resizing them

• Monitoring resource usage and performance to optimize costs

• Deploying applications and services using Azure App Service or Azure Kubernetes Service

• Troubleshooting issues such as network connectivity or performance problems

Functions return a value while procedures do not in Oracle.

• Functions are used to perform a specific task and return a value.

• Procedures are used to perform a specific task but do not return a value.

• Functions can be used in SQL statements while procedures cannot.

• Functions can be called from within procedures while procedures cannot be called from within functions.

Online data backup can be achieved through various methods and technologies.

• Use cloud storage services like Microsoft Azure, Amazon S3, or Google Cloud Storage.

• Implement backup software solutions like Veeam, Acronis, or Commvault.

• Utilize network-attached storage (NAS) devices for local backups.

• Create redundant copies of critical data to ensure data integrity.

• Regularly test and verify the backup and restore processes.

• Consider implementing a disaster recovery plan to handle dat...read more

Recursion is a process of calling a function within itself.

• Recursion is useful for solving problems that can be broken down into smaller sub-problems.

• It involves a base case and a recursive case.

• Examples include factorial, Fibonacci sequence, and binary search.

• Recursion can be memory-intensive and may cause stack overflow errors.

• Tail recursion optimization can be used to optimize recursive functions.

ITIL processes are designed to align IT services with business needs and improve efficiency.

• ITIL processes provide a framework for managing IT services

• They help to ensure that IT services are aligned with business needs

• They improve efficiency and effectiveness of IT operations

• Examples of ITIL processes include incident management, change management, and problem management

One method to remove spaces in a string is by using the replace() method in JavaScript.

• Use the replace() method with a regular expression to replace all spaces with an empty string

• Example: str.replace(/\s/g, '') will remove all spaces from the string 'hello world'

• Another method is to use the split() method to split the string by spaces and then join the array elements without spaces

Common bugs in API testing include incorrect data formats, authentication issues, and performance problems.

• Incorrect data formats such as missing or incorrect parameters

• Authentication issues like invalid tokens or permissions

• Performance problems such as slow response times or timeouts

To make apps secured, one needs to implement various measures such as encryption, authentication, and authorization.

• Implement encryption to protect data in transit and at rest

• Use strong authentication mechanisms such as two-factor authentication

• Implement authorization to restrict access to sensitive data and features

• Regularly update and patch the app to fix security vulnerabilities

• Conduct regular security audits and penetration testing

• Implement secure coding practices to prev...read more

I will use Excel data for project analysis by organizing and analyzing project data, creating charts and graphs for visualization, and identifying trends and patterns.

• Organize project data in Excel sheets for easy access and analysis

• Use Excel functions and formulas to calculate project metrics and KPIs

• Create charts and graphs to visualize project progress and performance

• Identify trends and patterns in project data to make informed decisions

• Use pivot tables to summarize and an...read more

NFR sheet can be prepared by identifying the non-functional requirements and documenting them in a structured format.

• Identify the non-functional requirements such as performance, scalability, reliability, security, usability, etc.

• Document the requirements in a structured format such as a spreadsheet or a table.

• Include details such as the requirement description, acceptance criteria, priority, and any dependencies.

• Ensure that the requirements are measurable and testable.

• Review...read more

There are various SAP certifications available for different modules and roles.

• SAP Certified Application Associate

• SAP Certified Technology Associate

• SAP Certified Development Associate

• SAP Certified Solution Consultant

• SAP Certified Business Associate

Virtual DOM is a lightweight copy of the actual DOM in React, used for efficient updates.

• Virtual DOM is a concept where a lightweight copy of the actual DOM is created in memory.

• When changes are made to the virtual DOM, React compares it with the actual DOM to identify the differences.

• React then updates only the necessary parts of the actual DOM, making the process more efficient.

• This helps in improving performance by reducing the number of direct manipulations to the actual ...read more

Fibre optical is a technology that uses thin strands of glass or plastic to transmit data through light signals.

• Fibre optical cables are used for high-speed internet connections.

• They are also used in telecommunications for long-distance communication.

• Fibre optical technology is more efficient and faster than traditional copper wire technology.

Latency is the time it takes for data to travel from the source to the destination, while bandwidth is the maximum rate of data transfer.

• Latency is the delay between the moment data is sent and when it is received.

• Bandwidth is the amount of data that can be transferred in a given amount of time.

• Latency is measured in milliseconds, while bandwidth is measured in bits per second.

• Examples: Latency can be affected by distance, network congestion, and processing time. Bandwidth ca...read more

Pricing procedure is a set of rules and conditions used to determine the price of a product or service.

• Pricing procedure is used in SAP to determine the price of a product or service

• It consists of various condition types such as discounts, taxes, surcharges, etc.

• Each condition type has its own set of rules and conditions that determine its value

• The pricing procedure is determined based on the sales area, customer, and material

• Examples of condition types include PR00 (base pri...read more

A computer is an electronic device that can perform various tasks by executing instructions given to it.

• A computer is made up of hardware components such as CPU, memory, and storage devices.

• It runs on an operating system and software applications.

• Computers can be used for various purposes such as communication, entertainment, and work.

• Examples of computers include desktops, laptops, tablets, and smartphones.

MSS in TCP refers to the maximum segment size, which is the largest amount of data that can be sent in a single TCP segment.

• MSS is negotiated during the TCP three-way handshake

• It is determined by the maximum transmission unit (MTU) of the network

• MSS can be adjusted by the sender or receiver using TCP options

• A smaller MSS can help prevent fragmentation and improve network performance

I handle difficult clients by remaining calm, listening actively, and finding solutions to their concerns.

• Remain calm and composed during interactions

• Listen actively to understand their concerns and frustrations

• Empathize with their perspective and show understanding

• Find solutions to address their issues and communicate effectively

Account payable is the amount of money a company owes to its suppliers or vendors for goods or services received but not yet paid for.

• It is a liability on the company's balance sheet

• It represents the amount owed to suppliers or vendors

• It is recorded as a credit in the company's books

• Examples include unpaid invoices for raw materials, utilities, or rent

• It is important to manage and pay accounts payable on time to maintain good relationships with suppliers

The heads under Income Tax Act are five - Salaries, Income from House Property, Profits and Gains of Business or Profession, Capital Gains, and Income from Other Sources.

• Salaries

• Income from House Property

• Profits and Gains of Business or Profession

• Capital Gains

• Income from Other Sources

The first step is to immediately cut off the power supply to the electrical room.

• Locate the main power switch and turn it off

• Call the fire department

• Evacuate the area and close all doors behind you

• Use a fire extinguisher if it is safe to do so

• Do not use water to extinguish an electrical fire

L3 activities refer to advanced technical support and troubleshooting.

• L3 activities involve resolving complex technical issues that cannot be handled by L1 or L2 support.

• L3 support may involve analyzing logs, debugging code, and providing solutions to critical problems.

• L3 support may also involve working closely with developers to identify and fix bugs in software.

• Examples of L3 activities include resolving network outages, diagnosing server issues, and troubleshooting softwa...read more

Serial method involves testing one sample at a time, while cover method involves testing multiple samples together.

• Serial method tests samples individually in sequence

• Cover method tests multiple samples simultaneously

• Serial method is time-consuming but more accurate

• Cover method is faster but may lead to false negatives

• Example: Serial method used in PCR testing, cover method used in pool testing

Handling a non-cooperative team member requires effective communication, understanding their perspective, and addressing any underlying issues.

• Initiate a conversation to understand their concerns and reasons for non-cooperation

• Listen actively and empathetically to their perspective

• Address any underlying issues or conflicts that may be causing their behavior

• Clearly communicate expectations and the impact of their non-cooperation on the team

• Offer support and resources to help t...read more

Transactional in Hibernate refers to the management of database transactions.

• Hibernate provides transaction management through the use of the Transaction interface.

• Transactions can be managed programmatically or declaratively using annotations.

• Transactional behavior can be customized using isolation levels and propagation settings.

• Example: @Transactional annotation can be used to mark a method as transactional.

• Example: session.beginTransaction() can be used to programmaticall...read more

Rank assigns unique ranks to each distinct value, while dense rank assigns consecutive ranks to each distinct value.

• Rank leaves gaps between ranks if there are ties, while dense rank does not

• Rank function is used to assign a unique rank to each distinct row, while dense rank function is used to assign consecutive ranks to each distinct row

• Example: If we have values 10, 20, 20, 30 - Rank would assign ranks as 1, 2, 2, 4 while Dense Rank would assign ranks as 1, 2, 2, 3

Code using hashmap and HashSet

• Create a HashMap object

• Add key-value pairs to the HashMap

• Create a HashSet object

• Add elements to the HashSet

• Retrieve values from the HashMap using keys in the HashSet

A primary key is a unique identifier for a record in a database table.

• It ensures that each record is unique and can be easily accessed.

• It is used to establish relationships between tables.

• It cannot be null or have duplicate values.

• Examples include social security numbers, email addresses, and employee IDs.

Batch class is a Salesforce feature used to process large amounts of data in chunks.

• Batch class implements the Database.Batchable interface in Salesforce

• It allows you to break down a large data set into smaller batches for processing

• Batch class is useful for handling large data volumes without hitting governor limits

• Example: A batch class can be used to update all account records with a specific field value

Git commands for committing, merging code, and resolving merge conflicts

• To commit code: git commit -m 'Commit message'

• To merge code from a branch: git merge branch_name

• To resolve merge conflicts: manually edit the conflicting files, add changes, and then commit the merge

return true means a positive response while return false means a negative response.

• return true is used to indicate that a certain condition is met or an operation is successful

• return false is used to indicate that a certain condition is not met or an operation has failed

• return true and return false are often used in conditional statements and functions

• example: function isEven(num) { if(num % 2 === 0) { return true; } else { return false; } }

Observable is a pattern for handling asynchronous data streams. Promises are a way to handle asynchronous operations.

• Observables allow for subscribing to a stream of data and reacting to each event as it comes in.

• Promises represent a value that may not be available yet, but will be resolved at some point in the future.

• async/await is a way to write asynchronous code that looks synchronous, by pausing execution until a promise is resolved.

• async/await can be used with promises, ...read more

A pass through query is a SQL statement that is sent directly to a remote database server for processing.

• It is used to execute SQL statements on a remote database server.

• It is composed of a SQL statement and a connection string.

• It is useful for querying large datasets that are stored on a remote server.

• It can improve performance by reducing network traffic.

• Example: SELECT * FROM [ODBC;Driver={SQL Server};Server=myServerAddress;Database=myDataBase;Uid=myUsername;Pwd=myPassword...read more

A singleton class is a class that can only have one instance created at a time.

• Singleton classes are often used in situations where there should only be one instance of a class, such as a database connection or a configuration manager.

• The class typically has a private constructor to prevent multiple instances from being created.

• The instance of the class is usually accessed through a static method or property.

• Example: Java's java.lang.Runtime class is a singleton class that pr...read more

Interfaces in Java define a contract for classes to implement certain methods and provide a way to achieve abstraction.

• Interfaces are declared using the 'interface' keyword in Java.

• All methods in an interface are abstract by default and do not have a method body.

• Classes can implement interfaces using the 'implements' keyword.

• Interfaces can be used to achieve multiple inheritance in Java.

• Example: public interface Shape { double calculateArea(); }

Answers to IT Analyst interview questions

• 1) Used collections like arrays, lists, and maps in Java and Python for storing and manipulating data

• 2) A function can return multiple values using tuples, arrays, or objects in programming languages like Python, Java, and C++

• 3) Materialized view is a database object that stores the result of a query and acts as a table, improving query performance by reducing the need for expensive joins and aggregations

• 4) Pragma autonomous transactio...read more

System refresh is a process of copying production data to a non-production environment to ensure the non-production environment is up-to-date.

• System refresh involves copying data from production to non-production environments.

• It helps ensure that the non-production environment has the most recent data for testing and development.

• System refresh can be done manually or automated using tools like SAP System Copy or Oracle Data Pump.

• It is important to carefully plan and execute s...read more

The function used in Selenium to access certified websites is 'acceptSslCerts()'.

• Use the 'acceptSslCerts()' function in Selenium to access certified websites

• This function is used to bypass SSL certificate errors while accessing secure websites

• Example: driver = new ChromeDriver(); driver.manage().acceptSslCerts();

JSX is a syntax extension for JavaScript that allows writing HTML elements in JavaScript code.

• JSX makes it easier to write and manage UI components in React

• It allows mixing HTML and JavaScript in a single file

• JSX gets transpiled into regular JavaScript by tools like Babel

Shallow copy only copies the references of objects, while deep copy creates new copies of objects.

• Shallow copy creates a new object but does not create copies of nested objects.

• Deep copy creates new copies of all nested objects.

• Shallow copy is faster and more memory efficient, but changes to nested objects affect both copies.

• Deep copy is slower and uses more memory, but changes to nested objects do not affect the original object.

An event listener is a procedure or function in a computer program that waits for an event to occur.

• Event listeners are commonly used in web development to handle user interactions like clicks, key presses, etc.

• They are used to trigger specific actions or functions when a certain event occurs.

• Event listeners can be added to HTML elements using JavaScript.

• Example: Adding a click event listener to a button element to perform an action when the button is clicked.

JS is single threaded to ensure simplicity and prevent race conditions.

• JS was designed to be single threaded to simplify programming and prevent race conditions.

• Having a single thread allows for easier debugging and predictable behavior.

• Examples of multi-threaded languages like Java can lead to complex synchronization issues.

• JS uses an event loop to handle asynchronous operations without the need for multiple threads.

I have used various design patterns such as Singleton, Factory, Observer, and Decorator.

• Singleton pattern for ensuring only one instance of a class is created.

• Factory pattern for creating objects without exposing the instantiation logic.

• Observer pattern for implementing event handling and notification.

• Decorator pattern for adding functionality to an object dynamically.

I implemented a solution using the tool by first analyzing the problem and then designing a plan of action.

• Identified the problem and its requirements

• Researched and selected the appropriate tool

• Designed a plan of action and implemented the solution

• Tested and evaluated the solution for effectiveness

• Documented the process and provided training to users

Agile process is an iterative approach to software development that emphasizes flexibility, collaboration, and customer satisfaction.

• Agile process involves breaking down a project into smaller, manageable chunks called sprints.

• It emphasizes continuous feedback and adaptation to changing requirements.

• It values individuals and interactions over processes and tools.

• Examples of Agile methodologies include Scrum, Kanban, and Extreme Programming (XP).

BAPI is more preferable as it provides a standardized interface and supports real-time data processing.

• BAPI provides a standardized interface for accessing SAP data and functionality

• BAPI supports real-time data processing and can be used for both read and write operations

• BDC is a legacy technology and requires more manual effort to maintain

• BAPI is more flexible and can be used across different SAP modules

• BAPI is recommended for integrating with non-SAP systems

Entity Framework is an ORM tool for .NET applications. It allows developers to work with databases using objects.

• Entity Framework is a Microsoft product

• It supports various database providers such as SQL Server, MySQL, Oracle, etc.

• It uses LINQ to query data from the database

• It supports Code First, Database First, and Model First approaches

• Recorded details can be viewed using SQL Profiler or logging frameworks like Serilog

Async await is syntactic sugar for promises, making asynchronous code easier to read and write.

• Async await allows writing asynchronous code that looks synchronous, making it easier to understand.

• Promises are objects that represent the eventual completion or failure of an asynchronous operation.

• Async await is built on top of promises and provides a more concise and readable way to work with asynchronous code.

• Async functions return a promise, which allows chaining and error han...read more

A dictionary in Python is a collection of key-value pairs. It does not accept duplicate keys.

• A dictionary is created using curly braces {}

• Keys in a dictionary must be unique, but values can be duplicated

• Example: my_dict = {'name': 'John', 'age': 30, 'city': 'New York'}

Master data refers to the key data entities that are critical to the business operations of an organization.

• Customer data

• Product data

• Vendor data

• Employee data

• Financial data

• Material data

• Asset data

• Location data

I use active listening, empathy, problem-solving, and conflict resolution techniques to manage difficult situations.

• Practice active listening to understand the root of the issue

• Show empathy towards the emotions of all parties involved

• Utilize problem-solving skills to find mutually beneficial solutions

• Employ conflict resolution techniques to de-escalate tensions

OOPS concept in Java stands for Object-Oriented Programming System, which is a programming paradigm based on the concept of objects.

• OOPS focuses on creating objects that contain both data and methods to manipulate that data.

• Key principles of OOPS include Inheritance, Encapsulation, Polymorphism, and Abstraction.

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

• Encapsulation involves bundling data and methods that operate on the data into a singl...read more

Designing a streaming data pipeline in GCP involves selecting appropriate services like Pub/Sub, Dataflow, BigQuery, and Cloud Storage.

• Use Google Cloud Pub/Sub for ingesting and distributing data streams

• Utilize Google Cloud Dataflow for processing and transforming data in real-time

• Store processed data in Google BigQuery for analysis and querying

• Consider using Google Cloud Storage for storing raw data or backups

Java is a statically typed language while Node.js is a runtime environment for JavaScript.

• Java is compiled while Node.js is interpreted

• Java is better for large-scale enterprise applications while Node.js is better for real-time applications

• Java has a larger community and more libraries while Node.js has a simpler and more lightweight architecture

• Java is used for Android app development while Node.js is used for server-side web development

• Java has better performance while Node...read more

Adding a user in Jenkins

• Go to Jenkins dashboard and click on 'Manage Jenkins'

• Click on 'Manage Users' and then 'Create User'

• Fill in the user details and click 'Create User'

• Assign the necessary permissions to the user

Pacing time is calculated by dividing the total number of transactions by the duration of the test.

• Pacing time is used to determine the rate at which virtual users should be generated during a performance test.

• It is calculated by dividing the total number of transactions by the duration of the test.

• For example, if the test is scheduled to run for 1 hour and the expected number of transactions is 10,000, the pacing time would be 6 seconds (3600 seconds / 10,000 transactions).

Jira is a project management tool used for tracking issues and managing software development projects. CI/CD pipeline automates software delivery process.

• Jira is a popular project management tool that allows teams to track issues, manage tasks, and plan projects.

• To create a CI/CD pipeline, you can use tools like Jenkins, GitLab CI/CD, or CircleCI to automate the software delivery process.

• In Jira, you can integrate with CI/CD tools to track the progress of software development...read more

An array is a data structure that stores a collection of elements of the same type in a contiguous memory location.

• Arrays are declared by specifying the data type of the elements and the number of elements in square brackets.

• Example: String[] names = new String[5];

• Elements in an array can be accessed using their index, starting from 0.

• Example: String firstElement = names[0];

Answering SQL query writing question for Senior Systems Engineer position

• Understand the database schema and table relationships

• Use SELECT, FROM, WHERE, GROUP BY, HAVING, and ORDER BY clauses

• Use JOINs to combine data from multiple tables

• Use aggregate functions like COUNT, SUM, AVG, MAX, and MIN

• Use subqueries to filter data based on results of another query