40+ Paytm First Games Interview Questions and Answers

Ansible playbooks automate configuration management. CI/CD pipeline automates software delivery. Tools include Jenkins, GitLab, and Travis CI.

• Ansible playbooks are written in YAML format and define tasks to be executed on remote hosts.

• CI/CD pipeline automates the software delivery process from code commit to production deployment.

• Tools for pipeline creation include Jenkins, GitLab, Travis CI, and CircleCI.

• Pipeline creation involves defining stages, jobs, and triggers to autom...read more

To get distinct data without using distinct keyword, use GROUP BY clause.

• Use GROUP BY clause with the column name to group the data by that column.

• Use aggregate functions like COUNT, SUM, AVG, etc. to get the desired result.

• Example: SELECT column_name FROM table_name GROUP BY column_name;

• Example: SELECT column_name, COUNT(*) FROM table_name GROUP BY column_name;

I have knowledge on various devops tools and have worked on challenging use cases such as implementing continuous integration and deployment pipelines using Jenkins and Docker.

• Proficient in using Jenkins, Docker, Git, Ansible, and Kubernetes

• Implemented CI/CD pipelines for multiple projects

• Automated deployment process using Ansible and Kubernetes

• Implemented containerization using Docker and Kubernetes

• Implemented infrastructure as code using Terraform

• Challenging use case: Setti...read more

final, finalize and finally are three different keywords in Java with different meanings.

• final is a keyword used to declare a constant variable.

• finalize is a method used for garbage collection.

• finally is a block used in exception handling to execute code regardless of whether an exception is thrown or not.

• final and finally are not related in any way.

Protocols are a set of rules or guidelines for communication between different objects. Closures are blocks of code that can be passed around and executed later.

• Protocols define a blueprint of methods, properties, and other requirements that a class or structure must implement.

• Closures capture and store references to any constants and variables from the context in which they are defined.

• Protocols are used to define a set of methods that can be implemented by any class, struct...read more

I will prioritize urgent client or user pings and respond promptly to address their needs.

• Prioritize urgent client or user pings over non-urgent ones

• Respond promptly to address their needs

• Communicate with the client or user to understand the issue and provide assistance

• Document the issue and resolution for future reference

Restful service process flow involves client sending requests to server, which responds with data in a standardized format.

• Client sends HTTP request to server

• Server processes request and sends back HTTP response

• Response is in a standardized format such as JSON or XML

• Client can then use the response data as needed

Double linked list has pointers to both next and previous nodes, while single linked list only has pointer to next node.

• Double linked list allows for traversal in both directions, while single linked list only allows traversal in one direction.

• Insertions and deletions are more efficient in double linked list as compared to single linked list.

• Double linked list requires more memory as compared to single linked list due to the additional pointer for previous node.

Data passing between view controllers can be done using properties, delegates, notifications, segues, or user defaults.

• Use properties to directly pass data between view controllers

• Implement delegates to establish communication between view controllers

• Post notifications to broadcast data to multiple view controllers

• Pass data through segues when transitioning between view controllers

• Store data in user defaults for persistent data sharing

Optional chaining and optional binding are techniques used in Swift programming language to safely unwrap optional values.

• Optional chaining allows you to access properties, methods, and subscripts of an optional that might currently be nil.

• Optional binding is a way to find out if an optional contains a value, and if so, to make that value available as a temporary constant or variable.

• Optional chaining uses '?' while optional binding uses 'if let' or 'guard let'.

MVC, MVVM, and VIPER are design patterns used in software development to separate concerns and improve code maintainability.

• MVC stands for Model-View-Controller and separates an application into three components: Model (data), View (UI), and Controller (logic).

• MVVM stands for Model-View-ViewModel and adds a ViewModel layer between the View and Model to handle user interactions and update the UI.

• VIPER is an application architecture pattern that stands for View-Interactor-Prese...read more

The main key strength that adds value is problem-solving skills.

• Ability to analyze complex problems and come up with effective solutions

• Critical thinking and logical reasoning skills

• Creativity in finding innovative solutions

• Adaptability to new technologies and frameworks

• Strong communication skills to collaborate with team members and stakeholders

Yes, I have worked on CDS views and implemented them in SAP systems.

• Define CDS view in ABAP Dictionary using DDL source code

• Activate CDS view using ABAP Development Tools (ADT)

• Use CDS view in ABAP programs for data retrieval and manipulation

I have worked on Microsoft Azure and Amazon Web Services (AWS) clouds.

• Microsoft Azure

• Amazon Web Services (AWS)

Hash table in Java is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.

• Hash table uses hashing function to map keys to indexes in an array.

• It provides constant time complexity O(1) for insertion, deletion, and retrieval operations.

• Example: HashMap and HashTable classes in Java implement hash tables.

Use SQL query to find max salary in different areas of employee

• Use GROUP BY clause to group employees by area

• Use MAX() function to find the maximum salary in each group

• Combine GROUP BY and MAX() to get the desired result

I optimize queries by analyzing indexes, rewriting queries, using stored procedures, and monitoring performance.

• Analyze indexes to ensure they are being utilized efficiently

• Rewrite queries to improve performance by reducing complexity or optimizing joins

• Use stored procedures to encapsulate complex logic and reduce query execution time

• Monitor query performance using tools like SQL Profiler or database management systems

Spring Boot is used for developing stand-alone, production-grade Spring-based applications.

• Spring Boot simplifies the development process by providing auto-configuration and opinionated defaults.

• It allows developers to quickly create and deploy applications with minimal configuration.

• Spring Boot provides a range of features like embedded servers, metrics, health checks, and security.

• It supports various technologies and frameworks, making it easy to integrate with existing sys...read more

To compare 2 files in file handling, read both files line by line and compare each line.

• Read both files line by line

• Compare each line of the files

• Handle cases where files have different number of lines

• Use file handling functions like fopen, fgets, and fclose

I implemented the algorithm using a combination of data structures and logic to efficiently solve the problem.

• Used arrays and loops to iterate through data

• Implemented conditional statements to make decisions

• Utilized functions to modularize code and improve readability

Vector in Java is a dynamic array that can grow or shrink in size as needed.

• Vector is a part of the Java Collections Framework.

• It is synchronized, meaning it is thread-safe.

• Elements can be accessed using indexes like arrays.

• Example: Vector v = new Vector();

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

• Python is an interpreted language, meaning it does not need to be compiled before running.

• It is a high-level language, making it easier to read and write compared to low-level languages like C.

• Python is dynamically typed, allowing for flexibility in variable types.

• It is known for its extensive standard library, which provides ready-to-use modules and packages.

• Python is widely use...read more

Angular application performance can be improved by optimizing code, reducing HTTP requests, and using lazy loading.

• Optimize code by using trackBy in ngFor loops, avoiding unnecessary watchers, and using pure pipes.

• Reduce HTTP requests by caching data, using server-side rendering, and bundling assets.

• Use lazy loading to load only necessary components and modules on demand.

• Consider using AOT compilation and tree shaking to reduce bundle size.

• Use performance profiling tools like...read more

AWS offers a wide range of cloud services for various purposes.

• Compute services: EC2, Lambda

• Storage services: S3, EBS

• Database services: RDS, DynamoDB

• Networking services: VPC, Route 53

• Security services: IAM, KMS

• Analytics services: Redshift, EMR

• AI/ML services: SageMaker, Rekognition

Microservice architecture is an architectural style that structures an application as a collection of loosely coupled services.

• Microservices are small, independent services that work together to form a complete application.

• Each microservice is responsible for a specific business function and can be developed, deployed, and scaled independently.

• Communication between microservices is typically done through APIs.

• Microservices promote flexibility, scalability, and resilience in s...read more

Code quality is maintained through various techniques and tools.

• Code reviews by peers and seniors

• Automated testing and continuous integration

• Adherence to coding standards and best practices

• Regular refactoring and optimization

• Use of static code analysis tools

• Documentation and comments

• Training and knowledge sharing

• Code profiling and performance monitoring

Function pointers are pointers that point to the memory address of a function.

• Function pointers can be used to pass functions as arguments to other functions.

• Function pointers can be used to create callback functions.

• Function pointers can be used to implement polymorphism in C.

• Function pointers can be used to create function tables.

• Function pointers can be used to implement function pointers in C++.

• Function pointers can be used to implement virtual functions in C++.

AWS cloud pillars are the foundation of AWS cloud computing services.

• Security - ensuring data protection and privacy

• Reliability - ensuring system availability and fault tolerance

• Performance Efficiency - optimizing resource utilization and scalability

• Cost Optimization - minimizing costs while maximizing benefits

IBM is a mainframe company that offers a wide range of products and services, while other mainframe companies may have a more limited scope.

• IBM has a long history in the mainframe market and is considered a leader in the industry.

• IBM mainframes are known for their reliability, scalability, and security features.

• IBM offers a comprehensive suite of software and hardware solutions for mainframe computing, including operating systems, databases, and development tools.

• Other mainfr...read more

Cmd is used to specify the default command to run when a container is started, while entry point is used to specify the executable that will run when the container starts.

• Cmd is optional and can be overridden at runtime, while entry point is required and cannot be overridden.

• Cmd is used to provide default arguments for the entry point command.

• Example: CMD ["python", "app.py"] - specifies the default command to run the Python script app.py

• Example: ENTRYPOINT ["java", "-jar", "...read more

CSS properties for page alignments

• text-align: center/left/right/justify

• margin: auto (for centering block elements)

• float: left/right (for aligning elements side by side)

• display: flex (for flexible box layout)

• position: absolute/relative (for precise positioning)

To stop a container, use the 'docker stop' command followed by the container ID or name.

• Use 'docker ps' command to list all running containers

• Identify the container ID or name of the container you want to stop

• Run 'docker stop ' to stop the container

CASE and Decode are SQL functions used to manipulate data. CASE is more flexible while Decode is simpler.

• CASE allows for multiple conditions and expressions while Decode only allows for one condition and multiple values

• CASE can be used in any SQL statement while Decode is specific to Oracle databases

• CASE is more readable and easier to maintain than Decode

• Example: CASE WHEN condition1 THEN result1 WHEN condition2 THEN result2 ELSE result3 END

• Example: Decode(column, value1, res...read more

Reverse a string in Java using StringBuilder or character array.

• Use StringBuilder's reverse() method to reverse the string.

• Alternatively, convert the string to a character array, swap characters from start and end, then convert back to string.

Address conflict by actively listening, seeking common ground, and finding a mutually beneficial solution.

• Listen actively to understand the other person's perspective

• Seek common ground and areas of agreement

• Collaborate to find a mutually beneficial solution

• Communicate openly and respectfully

Routing in Angular is the process of navigating between different components or views based on the URL.

• Routing allows users to navigate between different parts of an Angular application without a full page reload.

• Routes are defined in the app-routing.module.ts file using RouterModule.forRoot() method.

• Each route maps a URL path to a component, which is then displayed when the URL matches the path.

• Angular Router provides features like route guards, lazy loading, and nested rout...read more

Telephonic in-office interview question.

• Listen carefully to the interviewer's questions.

• Speak clearly and concisely.

• Be prepared to discuss your experience and skills.

• Ask questions about the company and position.

• Thank the interviewer for their time.

LINQ (Language Integrated Query) is a feature in C# that allows for querying data from different data sources using a SQL-like syntax.

• LINQ allows for querying data from collections, databases, XML, and more.

• It provides a uniform way to query different types of data sources.

• LINQ queries are written in C# and can be used to filter, sort, group, and manipulate data.

• Example: var result = from num in numbers where num % 2 == 0 select num;

DML stands for Data Manipulation Language and DDL stands for Data Definition Language.

• DML is used for manipulating data in a database, such as inserting, updating, deleting records.

• DDL is used for defining the structure of the database, such as creating tables, altering table structures, defining constraints.

• Examples of DML statements include INSERT, UPDATE, DELETE. Examples of DDL statements include CREATE, ALTER, DROP.

Ansible architecture is based on a client-server model where the control machine communicates with managed nodes using SSH.

• Ansible control machine: where playbooks are written and executed

• Managed nodes: machines that are being managed by Ansible

• Inventory: list of managed nodes

• Playbooks: automation scripts written in YAML format

• Modules: reusable units of code that perform specific tasks on managed nodes

Exception handling is a mechanism to handle errors or exceptional situations in a program.

• It allows the program to gracefully handle errors without crashing.

• Exceptions can be caught and handled using try-catch blocks.

• Common exceptions include NullPointerException, ArrayIndexOutOfBoundsException, and IOException.

• Exception handling helps in debugging and maintaining code.

• It separates error-handling code from normal code execution.

HashMap is a data structure in Java that stores key-value pairs and provides fast retrieval of values based on keys.

• HashMap is part of the Java Collections framework.

• It allows null keys and values.

• HashMap uses hashing to store and retrieve elements efficiently.

• Example: HashMap map = new HashMap<>();