IBPS SO IT Officer Important Questions 2026 is a curated set of 15 high-yield Professional Knowledge questions built around the concepts that repeat most often across previous-paper and memory-based analyses — SQL, networking, operating systems, data structures, cybersecurity, programming, and software engineering.
If you're preparing for the IBPS SO IT Officer Mains exam, reading theory alone won't get you through the Professional Knowledge paper. You need to apply core IT concepts under time pressure — interpret a query, calculate a subnet, trace a scheduling algorithm, or spot a security attack from a scenario. This guide gives you exactly that kind of practice, question by question, with clear explanations and quick revision notes you can revisit the night before your exam.
These are high-priority practice questions, not guaranteed predictions. IBPS can change the question mix and difficulty from one cycle to the next — use this list as a final revision tool, not your only source of preparation.
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15 Important IBPS SO IT Officer Mains Questions
Each question below targets a concept that examiners test repeatedly — not because it's guaranteed to appear again, but because it represents a pattern you're likely to see in some form. Work through them one at a time, cover the answer, and try to solve before checking.
DBMS & SQL (Questions 1–4)
DBMS and SQL carry the highest weightage in Professional Knowledge. Get comfortable with joins, normalization, ACID properties, and indexing before moving to anything else.
Consider two tables, EMPLOYEE(Emp_ID, Name, Dept_ID) and DEPARTMENT(Dept_ID, Dept_Name). Which SQL query correctly returns the names of all employees along with their department names, including employees who are not currently assigned to a department?
A relation has the functional dependencies A → B and B → C, where A is the candidate key. Which statement is correct?
A banking transaction debits ₹10,000 from Account A but the system crashes before the amount can be credited to Account B. Which ACID property ensures that the partially completed transaction is not committed?
Which characteristic of a B+ tree makes it particularly suitable for database indexing?
Not confident with Normalization yet? Read our full breakdown — Normalization in DBMS Explained — before attempting more DBMS questions.
Computer Networks (Questions 5–7)
Networking questions test whether you understand how data actually moves — layer by layer, packet by packet. Focus on the OSI model, TCP behaviour, and subnetting calculations.
A network administrator wants to identify the OSI layer primarily responsible for logical addressing and routing packets between different networks. Which layer should be considered?
During TCP connection establishment, which sequence correctly represents the three-way handshake?
An IPv4 network is configured with the CIDR prefix 192.168.10.0/26. How many usable host addresses are available in each subnet?
Operating Systems (Questions 8–9)
Scheduling and deadlock questions are almost always scenario-based. Rather than memorising definitions, practise tracing through examples until the logic becomes automatic.
Which CPU scheduling algorithm can cause the convoy effect, where short processes wait behind a long-running process?
Which statement best describes a safe state in the context of deadlock avoidance?
Data Structures & Algorithms (Questions 10–11)
DSA questions in banking IT exams stay conceptual rather than code-heavy — expect traversal logic and complexity analysis rather than full implementations.
A Binary Search Tree contains the values 50, 30, 70, 20, 40, 60 and 80. What will be the inorder traversal of this BST?
What is the time complexity of binary search on a sorted array containing n elements?
Cybersecurity & Cryptography (Questions 12–13)
Banking IT exams lean heavily on cybersecurity because banks handle sensitive financial data. Know the common attack types and what digital signatures actually guarantee.
A malicious attacker injects specially crafted SQL statements through an application's input field to manipulate or retrieve database information. Which attack is being described?
Which cryptographic mechanism is primarily used to provide authentication and integrity of a digitally signed message?
Programming & Software Engineering (Questions 14–15)
Round off your revision with core OOP and SDLC concepts — these are usually the easiest marks if your fundamentals are clear.
A parent class defines a method, and a child class provides its own implementation of that same method with the same method signature. Which OOP concept does this demonstrate?
A testing team verifies that individual modules work correctly before they are combined into the complete system. Which type of testing is primarily being performed?
Topic-wise Distribution of These 15 Questions
These 15 questions deliberately spread across the major Professional Knowledge areas rather than concentrating on one subject, so you get revision breadth in a single sitting.
| Topic | Questions | Concepts Covered |
|---|---|---|
| DBMS & SQL | 4 | Joins, Normalization, ACID, B+ Tree |
| Computer Networks | 3 | OSI Model, TCP, IPv4 Subnetting |
| Operating Systems | 2 | CPU Scheduling, Deadlock |
| Data Structures & Algorithms | 2 | BST, Complexity |
| Cybersecurity & Cryptography | 2 | SQL Injection, Digital Signatures |
| Programming & OOP | 1 | Method Overriding |
| Software Engineering | 1 | Unit Testing |
| Total | 15 | Major Professional Knowledge Areas |
This distribution is meant for revision breadth, not a prediction of exactly how many questions will come from each subject in the real exam. Recent memory-based-paper analyses have repeatedly listed DBMS/SQL, networking, operating systems, DSA, cybersecurity, programming, and software engineering among the areas covered in IBPS SO IT Officer Professional Knowledge papers.
What Should You Revise After These 15 Questions?
Treat this list as a revision checkpoint, not the complete syllabus. Here's what to cover next, topic by topic.
DBMS & SQL
- SQL queries and joins
- Aggregate functions
GROUP BYandHAVING- Subqueries
- Primary, foreign, and candidate keys
- Functional dependencies and normalization
- Transactions and ACID properties
- Concurrency control and serializability
- Indexing, B-tree, and B+ tree
- ER diagrams
- Data warehousing and basic OLAP concepts
Computer Networks
- OSI and TCP/IP models
- Network devices
- TCP vs UDP
- TCP three-way handshake
- IP addressing, CIDR, and subnetting
- DNS, DHCP, ARP
- HTTP and HTTPS
- Routing and NAT
- IPv6 basics
- Common network security concepts
Operating Systems
- Processes and threads
- Process states
- CPU scheduling and scheduling calculations
- Synchronization and semaphores
- Deadlocks and the Banker's Algorithm
- Paging, segmentation, and virtual memory
- Page replacement algorithms
- Fragmentation
- File systems
Data Structures & Algorithms
- Arrays, linked lists, stacks, queues
- Trees, Binary Search Trees, graphs
- Hashing
- Sorting and searching algorithms
- Recursion
- Big-O complexity
- Basic graph algorithms
Cybersecurity
- Authentication and authorization
- Malware, phishing, ransomware
- SQL Injection, XSS, CSRF
- Firewalls, IDS, and IPS
- Access control
- Symmetric and asymmetric encryption
- Hashing, digital signatures, and PKI
- SSL/TLS
Programming & Software Engineering
- OOP principles: inheritance, polymorphism, overloading vs. overriding
- Exception handling
- Programming output questions
- Data types and operators
- SDLC models and Agile
- Software testing: verification vs. validation, unit, integration, and system testing
- Software quality concepts
Knowing what a B+ tree is and solving a question that uses its properties are two different skills. The same is true for SQL queries, subnetting, CPU scheduling, deadlock, and algorithm complexity — concept revision has to be followed by application practice.
These 15 Questions Are Not Enough — Practice at Exam Level
Knowing the concepts is only half the battle. The real challenge is identifying the correct concept quickly and applying it under time pressure — exactly what the Mains exam tests.
After revising these questions, the next step is solving a larger set of IBPS SO IT Officer Professional Knowledge questions in a timed environment.
Revise → Practice → Analyse → Revise Weak Areas → Repeat
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Final Takeaway
These 15 questions are best used as a quick revision checkpoint before you move into full-scale practice. If you can solve them comfortably, that's a good sign — but don't mistake familiarity with these specific questions for complete Mains preparation. The actual Professional Knowledge paper can test the same underlying concepts in very different forms.
Revise the concepts. Solve varied questions. Analyse your mistakes. Then practise under exam conditions.