JNTU
JNTU MCA 2019 JAVA PROGRAMMING Previous Question Paper (April/May - 2019 - R13)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 20 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
Describe the Java program structure.
Answer
A Java program structure typically consists of the following components in order: a package declaration (optional), import statements to include external packages, interface definitions, and class definitions. A class contains member variables (fields) and methods, including the main method, which serves as the entry point for program execution. The syntax follows a block-based structure defined by curly braces.
What is the difference between an interface and an abstract class?
Answer
An abstract class can have both abstract and concrete methods, maintains state through instance variables, and supports single inheritance. An interface contains only abstract methods (prior to Java 8) and constants, supports multiple inheritance, and defines a contract that classes must implement.
Explain the different types of legacy collection classes.
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How does Java support inter thread communication?
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What are the different types of controls available in AWT?
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Part B
What is object oriented programming? Explain the need of object oriented programming.
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What is constructor? What are the rules of constructor? Give an example.
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List and explain Java Buzz words, in detail.
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What is constructor overloading? Explain with examples.
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How Packages differ from Interfaces? Explain.
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What is the importance of CLASSPATH? Discuss.
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What is interface? How to create it? Explain with example.
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Explain about accessing implementations through interface references.
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Explain about Java commonly used collection classes.
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Discuss about random access file operations.
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Write about the overview of Java collection framework.
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Explain the connectionless client/server interaction with diagrams.
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What is thread synchronization? Discuss with an example.
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Explain the following with necessary code snippets: i) Creating thread ii) Stopping and Blocking a Thread
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Explain various thread states and properties in detail.
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Explain about Exception Handling in Java with examples.
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Describe the different stages in the life cycle of an Applet.
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Explain the features of Swings in Java.
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What is AWT? List difference between AWT and swings.
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Write an applet program to enter personal details.
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