Introduction
Welcome to Day 1 – Evening Session of your ECET 2026 (CSE) preparation based on the C-23 curriculum. We’re kicking things off with one of the most fundamental subjects in Computer Science – Operating Systems (OS). Understanding how operating systems work is crucial not just for your diploma but also for scoring high in ECET. This topic forms the backbone of many technical MCQs, making it a must-practice area for every serious aspirant.
📘 Concept Notes – Introduction to Operating Systems
What is an Operating System (OS)?
An Operating System (OS) is a system software that acts as an intermediary between the user and the computer hardware. It provides a user-friendly environment to interact with hardware resources.
Key Functions of OS:
- Process Management – Handling processes and CPU scheduling.
- Memory Management – Allocation and deallocation of memory spaces.
- File System Management – Organizing, storing, retrieving, and securing data.
- Device Management – Coordinating and assigning I/O devices.
- User Interface – CLI (Command Line Interface) or GUI (Graphical User Interface).
Types of Operating Systems:
- Batch OS
- Time-Sharing OS
- Distributed OS
- Real-Time OS
- Network OS
- Mobile OS
Examples of Popular OS:
- Windows, Linux, Mac OS, Android, iOS, Unix
🔟 10 Most Expected MCQs – ECET 2026
Topic: Introduction to OS
Q1. What is the main function of an Operating System?
A) Word processing
B) Browsing the web
C) Resource management
D) Compiling code
Q2. Which of the following is not an operating system?
A) Windows
B) Linux
C) Oracle
D) Unix
Q3. The interface between the user and the hardware is called:
A) Compiler
B) Interpreter
C) Operating System
D) Application Software
Q4. Which OS type allows multiple users to share system resources at the same time?
A) Real-Time OS
B) Time-Sharing OS
C) Distributed OS
D) Batch OS
Q5. Which of these is a mobile operating system?
A) Windows
B) Android
C) DOS
D) Unix
Q6. Which of the following is a function of the operating system?
A) Hardware design
B) Programming language design
C) Process scheduling
D) Web development
Q7. What kind of OS is used in embedded systems and robotics?
A) Network OS
B) Real-Time OS
C) Distributed OS
D) Multi-user OS
Q8. What is the primary goal of an OS?
A) Play games
B) Provide programming tools
C) Efficient and convenient use of hardware
D) Internet access
Q9. UNIX OS is primarily used in:
A) Gaming systems
B) Scientific and industrial applications
C) Smartphones
D) Home appliances
Q10. What does GUI stand for?
A) Graphical Unit Interface
B) General User Interface
C) Graphical User Interface
D) General Utility Interface
✅ Answer Key Table
| Q.No | Answer |
|---|---|
| Q1 | C |
| Q2 | C |
| Q3 | C |
| Q4 | B |
| Q5 | B |
| Q6 | C |
| Q7 | B |
| Q8 | C |
| Q9 | B |
| Q10 | C |
🧠 Answer Explanations
Q1. ✅ OS handles hardware resources, making C: Resource management correct.
Q2. ✅ Oracle is a database, not an OS – so C: Oracle is correct.
Q3. ✅ The OS is the interface between user and hardware – hence C.
Q4. ✅ Time-Sharing OS allows multiple users access simultaneously – so B is correct.
Q5. ✅ Android is the correct mobile OS – B is right.
Q6. ✅ Process scheduling is a core OS task – C is correct.
Q7. ✅ Real-Time OS is used in time-critical systems like robotics – B is correct.
Q8. ✅ Main goal of OS is efficient hardware use – C is the right answer.
Q9. ✅ UNIX is widely used in scientific/industrial applications – B is right.
Q10. ✅ GUI means Graphical User Interface – correct answer is C.
🎯 Why This Practice Matters
Practicing ECET 2026 MCQs on topics like Introduction to Operating Systems helps you:
- 🔹 Strengthen your fundamentals from Day 1
- 🔹 Boost your confidence with ECET exam-style questions
- 🔹 Identify commonly asked topics from the C-23 Syllabus
- 🔹 Improve time management and accuracy in the exam
✅ Pro Tip: Revise this blog 3–4 times and try writing answers without looking to improve memory recall.
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