OOPS through JAVA Importent Questions

           Course Outcomes

CO1: Apply object-oriented programming principles and Java program structure to write, compile, and

execute basic Java programs using appropriate data types, operators, and control statements. (K3 – Apply)

CO2: Develop and utilize classes, objects, constructors, methods, access specifiers, and method overloading/overriding to implement modular and reusable Java applications. (K3 – Apply)

CO3: Implement and analyze arrays, inheritance models, interfaces, and abstract classes to design structured and extensible Java solutions for given problems. (K4 – Analyze)

CO4: Use and evaluate Java packages, standard libraries, exception handling mechanisms, and Java I/O streams to build robust and efficient applications. (K4 – Analyze)

CO5: Develop and integrate advanced Java features including string handling, multithreading, JDBC based database connectivity, and JavaFX GUI components to create interactive and concurrent

applications. (K5 – Evaluate)

Bloom's Level (OBL)

K1    (Remember)     K2 (Understand)   K3 (apply) K4 (Analyze)    K5 (Evaluate)

CO-PO Mapping

 

CO	PO1	PO2	PO3	PO4	PO5	PO6	PO7	PO8	PO9	PO10	PO11	PSO1	PSO2	PSO3
CO1	3	2	2	1	1	-	-	-	-	-	-	-	-	2
CO2	3	2	3	2	1	-	-	-	-	-	-	-	-	2
CO3	3	3	3	2	1	-	-	-	-	-	-	-	-	2
CO4	3	2	2	3	2	-	-	-	-	-	-	-	-	2
CO5	3	2	3	3	2	-	-	-	-	-	-	-	-	2
Avg	3	2.2	2.6	2.2	1.4	-	-	-	-	-	-	-	-	2

 

Q.No	QUESTIONS	MARKS	BT L	CO	PO
UNIT-I
1	Define Data Abstraction and Encapsulation with suitable examples.	2	K2	CO1	PO1
2	What is the purpose of public static void main (String [] args) in Java?	2	K1	CO1	PO1
3	Differentiate between primitive data types and reference data types in Java.	2	K2	CO1	PO1
4	Explain automatic type promotion (implicit casting) versus explicit type casting.	2	K2	CO1	PO1
5	Distinguish between bitwise logical operators (&, |) and short-circuit Boolean operators (&&, ||).	2	K2	CO1	PO1
6	What is the purpose of the final keyword when applied to a variable?	2	K1	CO1	PO1
7	How does the Scanner class read formatted input from the console? Give syntax.	2	K2	CO1	PO1
8	State the difference between break and continue statements inside a loop.	2	K2	CO1	PO1
9	What is the syntax and advantage of the enhanced for-each loop in Java?	2	K2	CO1	PO1
10	How do command-line arguments work in Java? How are numeric inputs parsed from them?	2	K3	CO1	PO2

 

Q.No	QUESTIONS	MARKS	BT L	CO	PO
11	Explain the basic principles of Object-Oriented Programming (OOP) supported by Java.	5	K2	CO1	PO2
12	Describe the various categories of operators available in Java with their precedence and associativity.	5	K2	CO1	PO2
13	Write a Java program that takes a student's marks via Command-Line Arguments and prints the grade using a switch statement.	5	K3	CO1	PO2
14	Compare and contrast while, do-while, and standard for loops with their control-flow diagrams and code snippets.	5	K2	CO1	PO2
15	Explain the role and scope of static variables and static methods with a worked code example.	5	K3	CO1	PO2
16	Write a Java program to check whether a given integer is a prime number using formatted output via System.out.printf().	5	K3	CO1	PO2
17	(a)  Discuss the structural architecture of a Java program, detailing tokens, identifiers, literals, and comments. (b)  Write a complete Java program to read 5 floating-point values from console input, calculate their sum and average, and display formatted output using printf().	10	K3	CO1	PO3

 

Q.No	QUESTIONS	MARKS	BT L	CO	PO
18	(a)  Explain the syntax and execution flow of nested decision-making statements (nested-if, if-else-if ladder, and conditional ?: operator).   (b)  Develop a Java program to solve quadratic equations 𝑎𝑥2 + 𝑏𝑥 + 𝑐 = 0 considering all discriminant conditions (Δ > 0, Δ = 0, Δ < 0).	10	K3	CO1	PO3
19	(a)  Elucidate Bitwise operators (AND, OR, XOR, Bitwise shift operators <<, >>, >>>) with binary arithmetic examples.   (b)  Write a Java program to reverse the digits of an integer and check if it is a Palindrome using iteration statements.	10	K3	CO1	PO3
20	(a)  Explain variable scope (local, instance, static) and lifetime in Java with memory layout illustrations. (b)  Write a Java application using nested for loops to generate a Pascal's Triangle up to N rows.	10	K3	CO1	PO3
UNIT-II
1	Define a class and an object. How is memory allocated for an object using new?	2	K1	CO2	PO1

 

Q.No	QUESTIONS	MARKS	BT L	CO	PO
2	List the four access specifiers in Java and their visibility scope.	2	K1	CO2	PO1
3	What is a constructor? State two distinct rules for defining a constructor.	2	K1	CO2	PO1
4	State the dual uses of this keyword in Java (reference variable vs. explicit constructor invocation this()).	2	K2	CO2	PO1
5	Differentiate between method overloading and method overriding.	2	K2	CO2	PO1
6	What happens when an object reference is assigned to another object reference variable?	2	K2	CO2	PO1
7	Why are static methods unable to access this or instance members directly?	2	K2	CO2	PO1
8	Define recursion in Java. What is the role of a base termination condition?	2	K2	CO2	PO1
9	What is a nested class? State the difference between static nested classes and inner classes.	2	K2	CO2	PO1
10	What is the effect of declaring a class as final?	2	K1	CO2	PO1
11	Explain constructor overloading with a suitable code example demonstrating parameterized and default constructors.	5	K3	CO2	PO2

 

Q.No	QUESTIONS	MARKS	BT L	CO	PO
12	Detail how Java implements "Pass-by-Value" for primitive types versus object references with illustrative memory diagrams.	5	K2	CO2	PO2
13	Write a Java program demonstrating method overloading for calculating the area of a circle, rectangle, and triangle.	5	K3	CO2	PO2
14	Explain the concept and implementation of recursive methods by writing a program to compute the 𝑛th Fibonacci number.	5	K3	CO2	PO2
15	Describe how private members of a class are accessed and modified using public getter and setter methods (Encapsulation).	5	K3	CO2	PO2
16	Explain the use of the final keyword when applied to instance variables, methods, and classes.	5	K2	CO2	PO2
17	(a) Explain the complete lifecycle of an object from declaration, instantiation, and initialization to garbage collection. (b) Design a BankAccount class with fields accountNumber, holderName, and balance. Implement overloaded constructors and methods for deposit(), withdraw(), and displayDetails().	10	K3	CO2	PO3
18	(a) Discuss method overloading versus method overriding with respect to method signatures, return types, binding time, and inheritance.	10	K3	CO2	PO3

 

Q.No	QUESTIONS	MARKS	BT L	CO	PO
	(b) Write a Java program demonstrating dynamic method dispatch using a base class Shape and derived classes Circle and Rectangle.
19	(a) What are the different categories of Nested Classes in Java? Explain with syntax. (b) Write a Java program where an outer class University instantiates an inner class Department to demonstrate access to outer private members.	10	K3	CO2	PO3
20	(a) Explain the mechanism of passing objects as arguments and returning objects from methods. (b) Develop a ComplexNumber class with attributes real and imaginary. Implement methods to add and multiply two ComplexNumber objects, returning the result as a new object.	10	K3	CO2	PO3
UNIT-III
1	What is an array and how is it declared and initialized in Java?	2	K1	CO3	PO1
2	Define inheritance and mention its types supported in Java.	2	K1	CO3	PO1
3	What is the purpose of the super keyword in Java inheritance?	2	K2	CO3	PO1
4	What is an abstract class?	2	K1	CO3	PO1

 

Q.No	QUESTIONS	MARKS	BT L	CO	PO
5	How is an interface declared and implemented in Java?	2	K3	CO3	PO2
6	Explain the storage of arrays in computer memory and discuss various operations performed on array elements.	5	K2	CO3	PO2
7	Describe method overriding and explain how dynamic method dispatch works in Java.	5	K3	CO3	PO2
8	Discuss the significance of default methods and static methods introduced in interfaces.	5	K2	CO3	PO2
9	Explain the Universal Super Class (Object Class) and how constructor methods interact during inheritance.	5	K2	CO3	PO2
10	Explain the different types of inheritance supported in Java in detail. How does Java achieve multiple inheritance through interfaces?	10	K4	CO3	PO3
11	Provide a comprehensive explanation of arrays in Java, covering one-dimensional, two-dimensional, three-dimensional arrays, arrays of varying lengths, and Class Arrays functionalities.	10	K4	CO3	PO3
12	(a)  Write a Java program to implement hierarchical inheritance and demonstrate method overriding. (b)  Explain abstract classes with a complete code example showing how abstract methods	10	K4	CO3	PO3

 

Q.No	QUESTIONS	MARKS	BT L	CO	PO
	are enforced and implemented in derived classes.
13	(a)  Explain the concept of interfaces in Java along with the significance of default and static methods. (b)  Write a program demonstrating multiple inheritance using interfaces where a class implements two interfaces containing default methods and resolves potential method resolution ambiguities.	10	K4	CO3	PO3
UNIT-IV
1	What is a package? How do you define and import packages into Java programs?	2	K2	CO4	PO1
2	What is auto-boxing and auto-unboxing?	2	K1	CO4	PO1
3	Differentiate between checked and unchecked exceptions in Java.	2	K2	CO4	PO1
4	What is the purpose of try, catch, and finally blocks?	2	K2	CO4	PO1
5	What is the difference between Byte streams and Character streams in Java I/O?	2	K2	CO4	PO1
6	Explain the hierarchy of standard exception classes in Java and the role of the Throwable class.	5	K2	CO4	PO2

 

Q.No	QUESTIONS	MARKS	BT L	CO	PO
7	Discuss wrapper classes and explain the core utilities available in the java.lang package.	5	K2	CO4	PO2
8	Explain the use of throw and throws keywords in exception handling with proper context.	5	K3	CO4	PO2
9	Describe standard I/O streams and explain the utility of the Scanner class and files in Java.	5	K2	CO4	PO2
10	Detail the process of defining packages, managing path and classpath, and exploring Java SE packages including java.util, formatters, and date/time packages.	10	K4	CO4	PO3
11	Provide a thorough explanation of exception handling mechanisms in Java, detailing multiple catch clauses, standard exception hierarchies, and file management using Java I/O APIs.	10	K4	CO4	PO3
12	(a)  Discuss the creation and handling of user-defined (custom) exceptions in Java with a complete application code. (b)  Explain exception propagation and the precise mechanics of using throw and throws keywords in checked exception handling.	10	K4	CO4	PO3
13	(a)  Explain the Java I/O stream hierarchy in detail, differentiating clearly between Byte streams and Character streams. (b)  Write a Java program to read text from a source file using character streams, count	10	K4	CO4	PO3

 

Q.No	QUESTIONS	MARKS	BT L	CO	PO
	lines, words, and characters, and write the report to a target file.
UNIT-V
1	What is the difference between the String and StringBuffer classes?	2	K2	CO5	PO1
2	What is a thread and what is the need for multithreaded programming on multi-core processors?	2	K2	CO5	PO1
3	List and briefly explain the various thread states in Java.	2	K1	CO5	PO1
4	What is JDBC architecture and what is the role of the ResultSet interface?	2	K2	CO5	PO1
5	What is JavaFX Scene Builder and how are mouse events handled?	2	K3	CO5	PO2
6	Explain the methods used for extracting characters, comparing, modifying, and searching strings within the String class.	5	K2	CO5	PO2
7	Discuss thread priority, synchronization, and how deadlock and race situations occur in multithreaded programs.	5	K4	CO5	PO2
8	Explain the steps to set up the JDBC environment, install MySQL Connector/J, and establish database connections.	5	K3	CO5	PO2

 

Q.No	QUESTIONS	MARKS	BT L	CO	PO
9	Describe the JavaFX application window structure, scene graph layout, and how text and images are displayed.	5	K2	CO5	PO2
10	Explain multithreaded programming in depth, covering thread creation using the Thread class, managing main thread, thread states, priorities, synchronization, and inter-thread communication.	10	K5	CO5	PO3
11	Discuss advanced Java features including JDBC database connectivity architecture and JavaFX GUI development, detailing scene graphs, window structures, and event handling.	10	K5	CO5	PO3
12	(a)  Compare and contrast String, StringBuffer, and StringBuilder classes with respect to mutability, memory pooling, and performance. (b)  Write a Java program using StringBuffer to perform various text manipulation tasks including custom insertions, deletions, and substring reversals.	10	K5	CO5	PO3
13	(a)  Explain inter-thread communication mechanisms in Java using wait(), notify(), and notifyAll() methods through the classic Producer-Consumer problem. (b)  Write a complete JDBC program to establish a connection to a MySQL database, execute an SQL query, and process the records using the ResultSet interface.	10	K5	CO5	PO3