JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD MCA 3 MOBILE COMPUTING Previous Question Paper (April/May - 2019 - R15)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART - A
Explain the 3-tier architecture for Mobile Computing.
Answer
The 3-tier architecture for mobile computing organizes the system into three distinct layers to manage data and application logic efficiently:
- Client Tier: Consists of mobile devices (PDAs, smartphones) that provide the user interface and handle local processing.
- Application Tier (Middleware): Acts as a bridge between the client and the database. It contains the business logic, manages communication protocols, and handles data synchronization.
- Data Tier (Enterprise Tier): Contains the backend databases and legacy systems where the actual data is stored, managed, and retrieved by the middleware.
Brief about NSS component of GSM protocol.
Answer
The Network Switching Subsystem (NSS) is the core of the GSM architecture, responsible for call control, mobility management, and subscriber authentication. Its key components include:
- MSC (Mobile Switching Center): The primary node that performs call switching and routing.
- HLR (Home Location Register): A central database containing permanent subscriber data and current location information.
- VLR (Visitor Location Register): A temporary database that stores data for subscribers currently roaming in a specific MSC area.
- AuC (Authentication Center): Provides security parameters for verifying subscriber identity.
- EIR (Equipment Identity Register): A database used to track mobile equipment via IMEI numbers.
Distinguish the adhoc wireless network from the one with infrastructure.
Answer
Sign in to view the complete answer paper.
Write about CLDC configuration of J2ME.
Answer
Sign in to view the complete answer paper.
Differentiate Lossy and lossless compressions of Multimedia.
Answer
Sign in to view the complete answer paper.
PART - B
Explain how Mobile IP solves the IP addressing issues of Mobile environment?
Answer
Sign in to view the complete answer paper.
Write about applications of Mobile Computing.
Answer
Sign in to view the complete answer paper.
Based on the environment mobility characteristics, mention the different Mobile Computing functions.
Answer
Sign in to view the complete answer paper.
Mention the salient features of IPv6 protocol.
Answer
Sign in to view the complete answer paper.
With a neat sketch write about the GSM system architecture.
Answer
Sign in to view the complete answer paper.
Write about SMS value-added Services Architecture with the help of a diagram.
Answer
Sign in to view the complete answer paper.
Write about IEEE 802.11 WLAN architecture.
Answer
Sign in to view the complete answer paper.
Write about any one IEEE 802.11 Physical layer protocol.
Answer
Sign in to view the complete answer paper.
Explain how mobility is dealt with in Wireless LAN?
Answer
Sign in to view the complete answer paper.
Write about WLAN Security.
Answer
Sign in to view the complete answer paper.
Giving the hierarchy, write about UI elements in MIDP of J2ME.
Answer
Sign in to view the complete answer paper.
Brief about the H.323 framework for Voice Over IP (VOIP).
Answer
Sign in to view the complete answer paper.
With a neat sketch, write about the Windows CE architecture.
Answer
Sign in to view the complete answer paper.
Write about Audio and Video Coder and Decoders (CODECs).
Answer
Sign in to view the complete answer paper.
Write about 3GPP security architecture.
Answer
Sign in to view the complete answer paper.
Through the architectural diagram, elaborate about IP Multimedia Subsystems (IMS).
Answer
Sign in to view the complete answer paper.