70+ Application Development - Senior Analyst Interview Questions and Answers

Lambda function is a serverless computing service that runs code in response to events and automatically manages the computing resources required by that code.

• Lambda functions are event-driven and can be triggered by various AWS services such as S3, DynamoDB, and API Gateway.

• They are written in languages such as Python, Node.js, and Java.

• Lambda functions are charged based on the number of requests and the duration of the code execution.

• They are highly scalable and can handle ...read more

CoreData is a framework provided by Apple for managing the model layer of an application.

• CoreData is used to manage the model layer of an application by providing an object graph management and persistence framework.

• It allows developers to define data models, fetch and save data, and perform complex queries.

• CoreData can be used to store data locally on a device, cache data from a server, or manage data in memory.

• It supports relationships between entities, versioning, and migr...read more

Hana is a database platform while ECC is an ERP system built on top of it.

• Hana is a column-oriented, in-memory database platform developed by SAP.

• ECC (Enterprise Central Component) is an ERP system built on top of the Hana platform.

• Hana is designed for real-time analytics and processing of large data sets.

• ECC is a suite of applications for managing business operations such as finance, logistics, and human resources.

• Hana is a newer technology compared to ECC, which has been ar...read more

ASP.NET is a web development framework used to build dynamic web pages and applications.

• ASP.NET uses server-side scripting to generate dynamic web pages.

• Session management in ASP.NET can be done using the Session object.

• Session state can be stored in-process, out-of-process, or in a SQL Server database.

• Session variables can be accessed and manipulated using the HttpContext.Current.Session property.

• Example: HttpContext.Current.Session['username'] = 'JohnDoe';

APP program is a software application that performs a specific task or set of tasks.

• APP stands for Application

• It is a software program designed to perform a specific task or set of tasks

• Examples include Microsoft Word, Adobe Photoshop, and Google Chrome

• APP programs can be developed for desktop, mobile, or web platforms

A web page can be created dynamically using server-side scripting languages like PHP, ASP.NET, and Node.js.

• Use server-side scripting languages to generate HTML, CSS, and JavaScript code dynamically

• Retrieve data from databases or APIs to populate the web page with dynamic content

• Use client-side scripting languages like jQuery to manipulate the DOM and create dynamic effects

• Frameworks like React and Angular can also be used to create dynamic web pages

• Ensure proper security meas...read more

PL/SQL triggers automate actions in the database, enhancing data integrity and enforcing business rules.

• Used to enforce data integrity by preventing invalid data entry. Example: A trigger that checks if a patient's age is above a certain limit before inserting their record.

• Automates auditing by logging changes to critical tables. Example: A trigger that records changes to patient records in an audit table.

• Facilitates complex business logic execution automatically. Example: A ...read more

No, commit statement cannot be used in BAdI.

• Commit statement should not be used in BAdI as it can lead to inconsistent data

• BAdIs are meant for enhancing the functionality of standard SAP applications, not for database operations

• Use BAdIs for implementing custom logic and enhancements without directly modifying standard code

Formatters in SAPUI5 are used to format data before displaying it in the UI.

• Formatters are used to format data such as dates, numbers, and currencies in SAPUI5 applications.

• They can be defined in the controller or view of the application.

• Formatters are typically used in binding expressions in XML views or in JavaScript controllers.

• Example: Using a formatter to display a date in a specific format like 'MM/dd/yyyy'.

There are three types of views in SAPUI5: XML view, JavaScript view, and JSON view.

• XML view: Define UI elements in XML format.

• JavaScript view: Define UI elements using JavaScript code.

• JSON view: Define UI elements in JSON format.

Hashmap is a data structure that stores key-value pairs and uses hashing to retrieve values quickly.

• Hashmap uses a hash function to map keys to indices in an array.

• Collisions can occur when multiple keys map to the same index, which is resolved using separate chaining or open addressing.

• Retrieving a value from a hashmap has an average time complexity of O(1), but worst case can be O(n).

• Examples of hashmap implementations include Java's HashMap class and Python's dictionary ty...read more

Change detection mechanism in Angular detects changes in the application state and updates the view accordingly.

• Angular uses Zone.js to intercept asynchronous operations and trigger change detection

• Change detection is triggered by events like user input, timers, XHR requests, etc.

• Angular compares the current and previous states of the application to detect changes and update the view

Context API is a built-in feature in React for managing global state, while Redux is a separate library for state management.

• Context API is built into React, while Redux is a separate library

• Context API is primarily used for smaller applications with simpler state management needs

• Redux is more suitable for larger applications with complex state management requirements

• Redux has a centralized store and follows a unidirectional data flow pattern

• Context API can lead to prop drill...read more

An end to end data flow is the complete journey of data from its origin to its destination.

• Data is generated at the source

• It is then collected and processed

• The processed data is stored in a database or data warehouse

• The data is then analyzed and transformed into insights

• Finally, the insights are presented to the end user or system

• Example: A customer's online purchase journey from adding items to cart to receiving the order

• Example: A sensor collecting data from a machine and s...read more

Oops Concepts in Java, Collections Framework

• Oops Concepts in Java include Inheritance, Polymorphism, Abstraction, and Encapsulation

• Collections Framework in Java provides a set of classes and interfaces to store and manipulate groups of objects

• Examples of collections in Java include ArrayList, HashMap, and LinkedList

Data in AMDP can be filtered using WHERE clause in SQL queries.

• Use WHERE clause in SQL queries to filter data in AMDP

• You can filter data based on specific conditions such as date range, value range, etc.

• Example: SELECT * FROM table_name WHERE column_name = 'value'

OAuth 2.0 can be implemented by following these steps

• Register your application with the OAuth provider

• Obtain client ID and secret

• Redirect user to OAuth provider's authorization endpoint

• Receive authorization code

• Exchange authorization code for access token

• Use access token to access protected resources

Asset accounting in SAP tracks and manages fixed assets throughout their lifecycle.

• Asset accounting involves creating and managing asset master records

• It tracks the acquisition, depreciation, and retirement of assets

• It provides reports on asset values, depreciation, and useful life

• Examples of assets include buildings, machinery, and vehicles

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

• A promise can be in one of three states: pending, fulfilled, or rejected.

• You create a promise using the Promise constructor: `let myPromise = new Promise((resolve, reject) => { ... });`

• You handle the result of a promise using `.then()` for success and `.catch()` for errors: `myPromise.then(result => { ... }).catch(error => { ... });`

• Promises can be chained to hand...read more

Wrapper class is a class that wraps a primitive data type to provide additional functionality.

• Wrapper classes are used to convert primitive data types into objects.

• They provide methods to convert between primitive data types and objects.

• Examples of wrapper classes include Integer, Double, and Boolean.

• Wrapper classes are often used in collections and generics.

• They can also be used to pass primitive data types as arguments in methods that require objects.

Mode on coding side in JS and Node.JS

• Mode refers to the most frequently occurring value in a dataset

• In JS, we can find mode using an object to count occurrences of each value

• In Node.JS, we can use the 'mode' package to find the mode of an array

• Mode can be useful in data analysis and machine learning

To make an app secure, implement encryption, authentication, and authorization.

• Use encryption to protect sensitive data in transit and at rest

• Implement authentication to verify user identity

• Use authorization to control access to app features and data

• Regularly update and patch the app to address security vulnerabilities

• Conduct regular security audits and penetration testing

• Educate users on best security practices, such as using strong passwords and avoiding public Wi-Fi

• Conside...read more

React is a JavaScript library for building user interfaces, while Angular is a full-fledged framework for web development.

• React is a library, while Angular is a framework.

• React uses a virtual DOM for better performance, while Angular uses a real DOM.

• React is more flexible and allows developers to choose their own tools, while Angular has a more opinionated structure.

• React is mainly used for building single-page applications, while Angular is suitable for building large-scale ...read more

DevOps practices are a set of principles and practices aimed at improving collaboration and communication between development and operations teams.

• Automation of processes to increase efficiency

• Continuous integration and continuous delivery (CI/CD)

• Monitoring and logging for improved visibility

• Infrastructure as code (IaC) for consistent environments

• Collaboration and communication between teams

Proguard is a tool that shrinks, optimizes and obfuscates Java code.

• Proguard is used to reduce the size of the code and make it run faster.

• It can also obfuscate the code to make it harder to reverse engineer.

• Proguard is commonly used in Android app development to reduce the size of the APK file.

• It works by analyzing the code and removing unused classes, fields, and methods.

• Proguard can also rename classes, fields, and methods to make them harder to understand.

• It can be config...read more

Angular lifecycle includes various stages like ngOnChanges, ngOnInit, ngDoCheck, etc.

• Angular components go through a series of lifecycle stages from creation to destruction.

• ngOnChanges is called when an input property changes.

• ngOnInit is called after the first ngOnChanges.

• ngDoCheck is called during every change detection run.

• ngAfterContentInit is called after content is projected into the component.

• ngAfterViewInit is called after the component's view has been initialized.

• ngOn...read more

Pandas is a Python library used for data manipulation and analysis.

• Pandas provides data structures like Series and DataFrame for handling data.

• It can be used for tasks like filtering, sorting, grouping, and merging data.

• Pandas also has built-in functions for handling missing data and reshaping data.

• Example: df = pd.read_csv('data.csv') # read data from CSV file

• Example: df.head() # display first 5 rows of data