JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV MOBILE APPLICATION DEVELOPMENT Previous Question Paper (December - 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
What is the importance of JVM?
Answer
The JVM is crucial for platform independence, allowing Java bytecode to run on any device with a compatible JVM without recompilation. It also provides essential memory management, security, and garbage collection services, which are vital for resource-constrained mobile environments.
Explain how many multiplex transmissions are used on digital cellular telephone network?
Answer
Digital cellular networks primarily use two types of multiplexing: Time Division Multiple Access (TDMA), where users share the same frequency by being assigned specific time slots, and Code Division Multiple Access (CDMA), where users share the same frequency simultaneously by using unique spreading codes. These allow multiple users to transmit data over the same channel without interference.
Explain how many ways to run a MIDlet program.
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List the system classes of J2ME.
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Distinguish between Screen and Canvas.
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Explain the types of commands used in Command class.
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Distinguish between Inner Joins and Outer Joins.
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Explain how to determine the number of columns in ResultSet.
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What is Cookie?
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Explain about the Connection interface class Hierarchy.
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Part B
Describe the different types of profiles are used in J2ME.
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Explain about Microwave Technology.
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Explain how J2ME is organized in detail.
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Explain about the Cellular Telephone networks.
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Write a HelloWorld MIDlet source code which contains two packages. These packages are imported at the beginning of the MIDlet to access MIDlet classes and lcdui classes. MIDlet classes are screen oriented and create a Display object and then place components of the screen into the Display object. The Display object is then invoked later in the MIDlet to display the screen on the small computing device.
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Explain about the J2ME software development kits.
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Explain the attributes of JavaApplication Descriptor File.
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Write a MIDlet program for Hiding the text in a Text Field.
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Explain the steps involved to create an Alert dialog box.
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Write a program to draw an immutable image on the canvas.
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Explain the steps required to create Check box.
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Explain about the J2ME user interface.
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Write a program to sort a mixed data types in a Record Enumeration.
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Explain how to insert data into Tables.
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Write a program to read data from the ResultSet.
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Explain about the HTTP request header.
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Explain how to retrieve information from a web server.
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Write a program to create a MIDlet to send an HTTP request and read an HTTP response, including body of the response from a server.
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