About this previous year paper
DESIGN & DEVELOPMENT OF APPLICATIONS (KCS-075)
B.Tech SEM VII – Complete Solved Question Paper (2022–23)
⏱ Time: 3 Hours | 📊 Marks: 100
SECTION A
Attempt all questions in brief (2 × 10 = 20 marks)
(a) Useful ways of Mobile Application Validation
Mobile application validation ensures that an app works correctly and meets user expectations. It includes functional testing, usability testing, performance testing, security testing, compatibility testing, and user acceptance testing before deployment
(b) What are Real-Time Embedded Systems?
Real-time embedded systems are systems that must respond to inputs within a strict time limit. Examples include airbag systems, medical monitoring devices, and industrial control systems where delayed response can cause failure
(c) What is an Embedded Operating System?
An embedded operating system is a specialized OS designed to run on embedded systems. It manages hardware resources, task scheduling, memory, and real-time constraints efficiently
(d) Issues related to Embedded System Design
Key issues include limited memory, low power consumption, real-time constraints, hardware-software integration, reliability, scalability, and cost constraints
(e) Hosting of an application in cloud computing environment
Hosting refers to deploying an application on cloud servers so it can be accessed via the internet. Cloud hosting provides scalability, availability, cost efficiency, and remote access
(f) Differentiate IaaS, PaaS, and SaaS
| IaaS | PaaS | SaaS |
|---|---|---|
| Provides infrastructure | Provides platform | Provides software |
| User manages OS & apps | User manages apps only | Provider manages everything |
| Example: AWS EC2 | Example: Google App Engine | Example: Gmail |
(g) Is it possible to add notes to a saved Google Map?
Yes, users can add notes or labels to saved locations in Google Maps, which helps in personal navigation, reminders, and location management
(h) How GPS works?
GPS works using satellites that transmit signals to a receiver. The receiver calculates its position by measuring the time delay of signals from multiple satellites using triangulation
(i) Important data types in Objective-C
Common data types include int, float, double, char, BOOL, NSString, NSArray, and NSDictionary
(j) What is iBeacon?
iBeacon is an Apple technology that uses Bluetooth Low Energy (BLE) to transmit signals to nearby iOS devices for location-based services and proximity marketing
SECTION B
Attempt any THREE (10 × 3 = 30 marks)
(a) Steps to publish a mobile application after development
After development, the steps include testing the app, generating release build, creating developer account, uploading app to store (Play Store/App Store), adding app description and screenshots, compliance checking, and final publishing
(b) Android Gestures and Touch Events with example
Android supports gestures like tap, swipe, pinch, and long-press. Touch events are handled using onTouchEvent() and gesture detectors.
Example: Swipe gesture is commonly used in image galleries and social media apps for navigation
(c) What is GPS and why it is important for social media applications?
GPS provides real-time location tracking. Social media apps use GPS for check-ins, location tagging, nearby friends, event discovery, and targeted content delivery
(d) Location Based Service (LBS) and its working
LBS provides services based on user location. It works by collecting location data via GPS, Wi-Fi, or cellular networks and delivering services like maps, navigation, and nearby search results
(e) Building a location-based app beyond GPS in iOS
iOS apps use GPS along with Wi-Fi positioning, Bluetooth beacons (iBeacon), motion sensors, and geofencing to provide accurate location services even indoors
SECTION C
Q3 (Attempt any one)
(a) Classification of Input/Output devices for embedded systems
Input devices include sensors, switches, keyboards, and cameras. Output devices include LEDs, LCDs, motors, buzzers, and displays. These devices help embedded systems interact with the environment
(b) Stages to validate Mobile Application Development
Validation stages include requirement analysis, functional testing, UI/UX testing, performance testing, security testing, compatibility testing, and user acceptance testing
Q4 (Attempt any one)
(a) Issues related to Embedded System Design
Issues include power management, memory limitation, hardware constraints, real-time response, reliability, security, and maintainability
(b) Layers in Mobile Application Architecture
Mobile application architecture includes: Presentation layer – UI and user interaction
Business logic layer – Application logic Data layer – Database and storage
Network layer – Server and APIs
Q5 (Attempt any one)
(a) Quality parameters in User Interface design
Important parameters include usability, consistency, simplicity, responsiveness, accessibility, visual clarity, and user satisfaction
(b) Comparison of mobile app development techniques
| Native | Hybrid | Web |
|---|---|---|
| High performance | Moderate performance | Low performance |
| Platform-specific | Cross-platform | Browser-based |
| Best UX | Faster development | Limited features |
Q6 (Attempt any one)
(a) History and architecture of Android OS
Android started in 2008 and is based on Linux kernel.
Architecture layers include Linux Kernel, Libraries, Android Runtime, Application Framework, and Applications.
( Draw neat architecture diagram)
(b) Importance of Data Persistence and SQLite in Flutter
Data persistence stores data permanently. SQLite in Flutter is implemented using sqflite package to store user data locally
Q7 (Attempt any one)
(a) Integration of Address Book and Calendar with social media apps
Social media apps integrate contacts and calendar to suggest friends, sync events, and send reminders. Example: Facebook syncing contacts to find friends
(b) iOS App States and UI layout options
iOS app states include Not Running, Inactive, Active, Background, and Suspended.
UI layout options include Storyboards, Auto Layout, SwiftUI, and Programmatic UI design