AKTU Object Oriented Programming with Java · Important Questions 2026Source: ryzenstudy.com PYQs
BCS403 Object Oriented Programming with Java Important Questions 2026 (AKTU)
Repeat analysis + most-asked questions, unit-wise
What we did: built from all 3 AKTU Object Oriented Programming with Java papers (2023-24–2025-26): 70 questions grouped into 41 distinct questions, 15 of which were asked in more than one paper.
- of marks were repeat questions
- —
- of marks were repeat questions
- questions asked in 2+ papers
- 15
- questions asked in 2+ papers
- papers analysed (2023-24–2025-26)
- 3
- papers analysed (2023-24–2025-26)
- units, mapped to current syllabus
- 5
- units, mapped to current syllabus
How much of the paper repeats?
- Not enough papers yet to measure this for this subject.
Across 10 subjects and 23 papers we tested, 43% of marks repeated earlier questions on average.
1.Unit-wise most-asked questions
Ranked by how many papers asked them, then by how recently. Click a paper to open it.
Unit 1: Introduction · Object Oriented Programming
21% of past marks| Question | Asked |
|---|---|
| State the specific functions of the JVM, JRE, and JDK. Why is the JVM the reason Java is called platform independent? | Asked 3× |
| What is the role of constructors in Java classes and when are they invoked automatically? | Asked 3× |
| Explain the concept of Method Overriding. How does Java decide which method to call at runtime when a subclass object is assigned to a superclass reference? | Asked 2× |
| Discuss the four pillars of Object-Oriented Programming: Encapsulation, Abstraction, Inheritance, and Polymorphism. Also explain how they help in building reusable code. 7 marks2025-26 Q2(a) | Asked 1× |
Unit 2: Packages · Input /Output Basics · Multithreading
25% of past marks| Question | Asked |
|---|---|
| Explain the difference between Byte Streams and Character Streams. Describe the classes used to read and write a simple text file. | Asked 2× |
| Define a Thread. What is the difference between extending Thread and implementing Runnable? | Asked 2× |
| List the five exception handling keywords. Can a try block exist without a catch or finally? | Asked 2× |
| Write a Java program to solve the Producer-Consumer problem using a shared buffer and the methods wait() and notify(). | Asked 1× |
Unit 3: Java New Features
18% of past marks| Question | Asked |
|---|---|
| What is a Functional Interface in Java? Write a program that uses Lambda Expressions to perform basic arithmetic operations (Add, Sub, Mul) via a custom Functional Interface. | Asked 3× |
| What is Stream API? Use the Stream API to process a list of Employee objects: filter those with salary > 50000, and print their names in uppercase. | Asked 3× |
| Describe Sealed Classes and Records in detail. How do these features improve data modeling in Java? | Asked 2× |
| Explain the Diamond Syntax (<>) introduced in Java 7. How does it make generic code easier to write? 2 marks2025-26 Q1(e) | Asked 1× |
Unit 4: Java Collections Framework
18% of past marks| Question | Asked |
|---|---|
| Give a detailed description of the Java Collection Framework hierarchy. Also explain the relationship between the Iterable, Collection, and List interfaces. | Asked 3× |
| Write a Java program that uses a HashMap to store a Phone Book (Name as key, Phone Number as value). Implement a feature to search for a number by name. | Asked 3× |
| Write a Java program using ArrayList to store 5 employee objects (ID, Name, Salary). Sort the list by salary in descending order using a Comparator. 7 marks2025-26 Q7(a) | Asked 1× |
| Why does TreeSet keep elements in sorted order, while HashSet does not? 2 marks2025-26 Q1(f) | Asked 1× |
Unit 5: Spring Framework
18% of past marks| Question | Asked |
|---|---|
| Explain Dependency Injection with a real-world example. How does Spring's Inversion of Control container manage these dependencies? | Asked 3× |
| Explain the architecture of a RESTful Web Service. How does Spring Boot handle a client request and return a JSON response? | Asked 2× |
| Explain the Spring Bean Lifecycle. Describe the steps from when a bean is instantiated until it is destroyed by the container. | Asked 2× |
| Describe the structure of a basic Spring Boot application. What are the advantages of using Spring Boot over traditional web frameworks? | Asked 2× |
2.Topic weightage: which topics carry the marks
Blue = Tier 1 + Tier 2 (topics that carried ~80% of past marks). Grey = the rest. It shows where marks have gone, not a promise of what comes next.
Functional interfaces and lambdas · U3
6% (cum 6%)
List, ArrayList, LinkedList, Stack · U4
5.3% (cum 11%)
Exception handling keywords · U2
5.3% (cum 17%)
Collection framework hierarchy · U4
5.3% (cum 22%)
Dependency injection and IoC · U5
5.3% (cum 27%)
Thread life cycle and creation · U2
5.2% (cum 32%)
Spring Boot basics and structure · U5
5.2% (cum 38%)
Stream API · U3
5% (cum 43%)
Synchronization and inter-thread communication · U2
5% (cum 48%)
Byte and character streams · U2
4.8% (cum 52%)
Map, HashMap, TreeMap · U4
4.7% (cum 57%)
Inheritance, overriding and overloading · U1
4.5% (cum 62%)
JVM, JRE and platform independence · U1
4.4% (cum 66%)
Classes, objects and constructors · U1
4.2% (cum 70%)
Checked, unchecked and custom exceptions · U2
3% (cum 73%)
Bean life cycle · U5
3% (cum 76%)
REST controllers and request mapping · U5
3% (cum 79%)
Records and sealed classes · U3
2.7% (cum 82%)
Interfaces and abstract classes · U1
2.7% (cum 85%)
Data types and control flow · U1
2% (cum 87%)
Encapsulation, polymorphism, abstraction · U1
1.8% (cum 88%)
Arrays and strings · U1
1.7% (cum 90%)
Annotations · U3
1.7% (cum 92%)
Packages and CLASSPATH · U2
1.5% (cum 93%)
Switch expressions and text blocks · U3
1.5% (cum 95%)
Sorting with Comparable and Comparator · U4
1.5% (cum 96%)
GET, POST, PUT, DELETE APIs · U5
1% (cum 97%)
Diamond syntax and try-with-resources · U3
0.9% (cum 98%)
Queue and Set interfaces · U4
0.9% (cum 99%)
AOP · U5
0.9% (cum 100%)
| Topic | Papers | Share |
|---|---|---|
| Functional interfaces and lambdas · Unit 3 · Tier 1 | 3/3 | 6% |
| List, ArrayList, LinkedList, Stack · Unit 4 · Tier 1 | 2/3 | 5.3% |
| Exception handling keywords · Unit 2 · Tier 1 | 3/3 | 5.3% |
| Collection framework hierarchy · Unit 4 · Tier 1 | 3/3 | 5.3% |
| Dependency injection and IoC · Unit 5 · Tier 1 | 3/3 | 5.3% |
| Thread life cycle and creation · Unit 2 · Tier 1 | 3/3 | 5.2% |
| Spring Boot basics and structure · Unit 5 · Tier 1 | 2/3 | 5.2% |
| Stream API · Unit 3 · Tier 1 | 3/3 | 5% |
| Synchronization and inter-thread communication · Unit 2 · Tier 1 | 2/3 | 5% |
| Byte and character streams · Unit 2 · Tier 1 | 2/3 | 4.8% |
| Map, HashMap, TreeMap · Unit 4 · Tier 2 | 3/3 | 4.7% |
| Inheritance, overriding and overloading · Unit 1 · Tier 2 | 2/3 | 4.5% |
| JVM, JRE and platform independence · Unit 1 · Tier 2 | 3/3 | 4.4% |
| Classes, objects and constructors · Unit 1 · Tier 2 | 3/3 | 4.2% |
| Checked, unchecked and custom exceptions · Unit 2 · Tier 2 | 2/3 | 3% |
| Bean life cycle · Unit 5 · Tier 2 | 2/3 | 3% |
| REST controllers and request mapping · Unit 5 · Tier 2 | 2/3 | 3% |
| Records and sealed classes · Unit 3 · Tier 2 | 2/3 | 2.7% |
| Interfaces and abstract classes · Unit 1 · Tier 3 | 1/3 | 2.7% |
| Data types and control flow · Unit 1 · Tier 3 | 1/3 | 2% |
| Encapsulation, polymorphism, abstraction · Unit 1 · Tier 3 | 1/3 | 1.8% |
| Arrays and strings · Unit 1 · Tier 3 | 1/3 | 1.7% |
| Annotations · Unit 3 · Tier 3 | 1/3 | 1.7% |
| Packages and CLASSPATH · Unit 2 · Tier 3 | 1/3 | 1.5% |
| Switch expressions and text blocks · Unit 3 · Tier 3 | 1/3 | 1.5% |
| Sorting with Comparable and Comparator · Unit 4 · Tier 3 | 1/3 | 1.5% |
| GET, POST, PUT, DELETE APIs · Unit 5 · Tier 3 | 1/3 | 1% |
| Diamond syntax and try-with-resources · Unit 3 · Tier 3 | 1/3 | 0.9% |
| Queue and Set interfaces · Unit 4 · Tier 3 | 1/3 | 0.9% |
| AOP · Unit 5 · Tier 3 | 1/3 | 0.9% |
3.Paper pattern (2025-26)
| Section | Questions | Rule |
|---|---|---|
| A | 7 × 2 marks | Attempt all |
| B | 5 × 7 marks | Attempt any 3 |
| C | 12 × 7 marks | Attempt any 1 |
4.In the syllabus, never asked yet
Low priority, but read them once — a new paper can always start here.
- Reading and writing files · U2
- Default/static methods and forEach · U3
- Bean scopes and autowiring · U5
5.Study order
- 1Functional interfaces and lambdas (Unit 3, Tier 1)
- 2List, ArrayList, LinkedList, Stack (Unit 4, Tier 1)
- 3Exception handling keywords (Unit 2, Tier 1)
- 4Collection framework hierarchy (Unit 4, Tier 1)
- 5Dependency injection and IoC (Unit 5, Tier 1)
- 6Thread life cycle and creation (Unit 2, Tier 1)
- 7Spring Boot basics and structure (Unit 5, Tier 1)
- 8Stream API (Unit 3, Tier 1)
- 9Synchronization and inter-thread communication (Unit 2, Tier 1)
- 10Byte and character streams (Unit 2, Tier 1)
- 11Map, HashMap, TreeMap (Unit 4, Tier 2)
- 12Inheritance, overriding and overloading (Unit 1, Tier 2)
- 13JVM, JRE and platform independence (Unit 1, Tier 2)
- 14Classes, objects and constructors (Unit 1, Tier 2)
- 15Checked, unchecked and custom exceptions (Unit 2, Tier 2)
- 16Bean life cycle (Unit 5, Tier 2)
- 17REST controllers and request mapping (Unit 5, Tier 2)
- 18Records and sealed classes (Unit 3, Tier 2)
FAQ
Which units of BCS403 carry the most marks?
Unit 2 (Packages · Input /Output Basics · Multithreading, 25% of past marks) and Unit 1 (Introduction · Object Oriented Programming, 21% of past marks).
Do AKTU Object Oriented Programming with Java questions repeat?
15 questions have appeared in more than one of the 3 papers so far. There are not enough papers yet to measure the repeat share reliably.
How is this list made?
Every question from the 3 papers (2023-24–2025-26) was mapped to the current AKTU syllabus and grouped with the same question from other years. Questions are ranked by how many papers they appeared in, then by how recently.
Study this subject
Note: this is based on past AKTU papers, not a guarantee. Questions are mapped to the current syllabus; topics that are no longer in the syllabus are left out.