NIOS Class 12 Computer Hardware Assembly and Maintenance 663 Important Questions 2026

NIOS Class 12 Computer Hardware Assembly and Maintenance 663 Important Questions 2026 (Code 663) – Chapter-Wise Objective Question Bank

If you are preparing for the NIOS Class 12 exam in 2026 and looking for the most important questions for Computer Hardware Assembly and Maintenance (Code 663), you have come to the right place. At Unnati Education, we have carefully prepared a chapter-wise objective question bank that covers all the key topics of this subject. These questions are based on the latest 2026 NIOS exam pattern and are most likely to appear in your upcoming exam. For solutions and complete study support, contact Unnati Education today.

NIOS Class 12 Computer Hardware Assembly and Maintenance (663) Important Questions – Quick Overview

Here is a quick overview of what this important question bank covers so you can plan your preparation better.

What Are NIOS Class 12 Computer Hardware Assembly and Maintenance 663 Important Questions 2026?

NIOS Class 12 Computer Hardware Assembly and Maintenance 663 important questions are a carefully selected set of objective questions from each chapter of the NIOS 663 syllabus. These questions are prepared based on previous year exam trends, the latest NIOS curriculum, and the most commonly tested concepts. Instead of going through the entire textbook, students can use this question bank to focus on what matters most in the exam.

This question bank is designed especially for students who want to save time and score better. Each question in this bank is selected because it has either appeared before or has a high chance of appearing in the 2026 NIOS exam. Whether you are appearing in the April-May 2026 exam or the October-November 2026 exam, these important questions will help you prepare with confidence.

For the complete solutions to all these questions, you can connect with Unnati Education. We provide accurate, updated, and easy-to-understand solutions for every chapter.

If you are also preparing for other subjects, you can check our NIOS Class 12 Important Questions page to find similar question banks for other subjects.

Chapter-Wise Important Objective Questions for NIOS Computer Hardware Assembly and Maintenance (Code 663)

Module 1 – Introduction to Computers: Important Questions

Introduction to Computers – Important Objective Questions

This chapter introduces the basic concepts of computers and their working. Here are some sample important objective questions from this chapter.

Which of the following is an example of an input device? a) Monitor b) Keyboard c) Printer d) Speaker

The full form of CPU is: a) Central Processing Unit b) Computer Processing Unit c) Central Program Unit d) Control Processing Unit

Which generation of computers used transistors? a) First Generation b) Second Generation c) Third Generation d) Fourth Generation

A computer processes data and gives output in the form of: a) Instructions b) Information c) Input d) Binary

The brain of the computer is called: a) Monitor b) RAM c) CPU d) Hard Disk

Computer Components – Important Objective Questions

This chapter covers the main hardware parts of a computer. Below are sample questions from this chapter.

RAM stands for: a) Read Access Memory b) Random Access Memory c) Rapid Access Memory d) Read Accessible Memory

Which component stores data permanently? a) RAM b) Cache Memory c) ROM d) Register

The motherboard connects: a) Only CPU and RAM b) All components of a computer c) Only input devices d) Only output devices

Which of the following is an output device? a) Scanner b) Mouse c) Monitor d) Keyboard

The speed of a processor is measured in: a) MB b) GB c) GHz d) Hz

Data Representation in Computer – Important Objective Questions

This chapter focuses on how data is stored and processed inside a computer. Here are some important questions.

The binary number system uses how many digits? a) 8 b) 10 c) 2 d) 16

Which of the following is the decimal equivalent of binary 1010? a) 8 b) 10 c) 12 d) 14

ASCII stands for: a) American Standard Code for Information Interchange b) Advance Standard Code for Information Interchange c) American System Code for Information Interchange d) None of the above

1 Byte is equal to: a) 4 bits b) 8 bits c) 16 bits d) 32 bits

The hexadecimal number system has a base of: a) 2 b) 8 c) 10 d) 16

If you are preparing NIOS Class 12 Intext and Terminal Questions for this subject, these chapter-based questions will also help you understand how different types of questions are framed.

Module 2 – Computer System Architecture: Important Questions

Anatomy of a Computer System – Important Objective Questions

This chapter explains the structure and architecture of a computer system. Here are the most important sample questions.

ALU performs which type of operations? a) Logical only b) Arithmetic only c) Both arithmetic and logical d) Storage operations

Which bus carries data between the CPU and memory? a) Address Bus b) Control Bus c) Data Bus d) System Bus

The control unit is responsible for: a) Storing data b) Executing arithmetic operations c) Managing and coordinating all computer operations d) Sending output to the monitor

Cache memory is: a) Slower than RAM b) Faster than RAM c) Same speed as RAM d) A type of secondary storage

BIOS is stored in: a) RAM b) Hard Disk c) ROM d) Cache

Tools for Assembling Computer – Important Objective Questions

This chapter teaches students about the tools needed to assemble a computer. Here are some sample objective questions.

Which tool is used to tighten screws in a computer cabinet? a) Pliers b) Screwdriver c) Soldering iron d) Multimeter

An antistatic wrist strap is used to: a) Cool down components b) Prevent static electricity damage c) Test voltage levels d) Measure resistance

Which of the following is a measuring tool used during computer assembly? a) Screwdriver b) Pliers c) Multimeter d) Tweezers

A POST card is used to: a) Assemble the motherboard b) Diagnose hardware errors during startup c) Install operating systems d) Format hard drives

Thermal paste is applied between: a) RAM and motherboard b) CPU and heat sink c) Hard disk and power supply d) Graphics card and monitor

Assembling a Personal Computer – Important Objective Questions

This is one of the most important practical concept chapters in this subject. Here are the key objective questions.

The first step in assembling a PC is: a) Installing the operating system b) Installing the CPU on the motherboard c) Connecting all cables d) Formatting the hard disk

The CPU socket on the motherboard is designed to: a) Hold the RAM b) Connect the power supply c) Seat the processor d) Attach the heat sink

SMPS stands for: a) Switched Mode Power Supply b) Simple Mode Power Supply c) Standard Mode Power Supply d) Single Mode Power Supply

Which slot is used for a graphics card on a motherboard? a) PCI b) PCIe x16 c) RAM slot d) SATA port

The correct order of assembling a PC starts with: a) Installing RAM first b) Mounting the motherboard inside the cabinet first c) Connecting the power supply first d) Installing the hard disk first

Module 3 – System Installation and Configuration: Important Questions

Preparing System for Installation – Important Objective Questions

This chapter covers the steps needed before installing an operating system on a computer. Here are some important questions from this chapter.

Before installing an OS, the hard disk must be: a) Formatted only b) Partitioned and formatted c) Connected to the internet d) Upgraded with more RAM

BIOS settings are accessed by pressing which key during startup? a) F1 or Delete b) Ctrl + Alt + Del c) Windows Key d) Escape

Partitioning a hard disk means: a) Formatting it completely b) Dividing it into logical sections c) Deleting all data d) Installing an OS

The boot order in BIOS should be set to: a) Hard Disk first b) DVD Drive or USB first for installation c) Network first d) Floppy Disk first

MBR stands for: a) Master Boot Record b) Main Boot Record c) Memory Boot Register d) Master Byte Record

Operating System Installation – Important Objective Questions

This chapter is very practical and important. Here are some key sample objective questions.

Which of the following is a type of operating system? a) MS Word b) Adobe Photoshop c) Windows 10 d) VLC Player

The minimum RAM required to install Windows 10 (32-bit) is: a) 128 MB b) 512 MB c) 1 GB d) 2 GB

During OS installation, the process of dividing a hard disk into sections is called: a) Formatting b) Partitioning c) Defragmenting d) Compressing

A device driver is: a) A person who manages hardware b) Software that allows the OS to communicate with hardware c) A type of antivirus d) A type of RAM

Which file system is most commonly used in Windows? a) FAT16 b) FAT32 c) NTFS d) EXT4

Module 4 – Networking Basics: Important Questions

Network Basics – Important Objective Questions

This chapter introduces students to how networks function. Here are some sample important questions.

LAN stands for: a) Large Area Network b) Local Area Network c) Long Area Network d) Linked Area Network

Which device connects two different networks? a) Hub b) Switch c) Router d) Repeater

The IP address is used for: a) Identifying a computer on a network b) Storing data permanently c) Connecting to a power source d) Formatting the hard drive

Which of the following is a wireless network standard? a) Ethernet b) Wi-Fi (IEEE 802.11) c) USB d) HDMI

A server in a network is: a) A computer that only receives data b) A computer that provides services to other computers c) A type of cable d) A type of printer

Network Configuration – Important Objective Questions

This chapter covers the practical aspects of setting up a network. Here are some key sample questions.

DNS stands for: a) Digital Network Service b) Domain Name System c) Data Network System d) Dynamic Node Service

DHCP is used to: a) Assign IP addresses automatically b) Encrypt network data c) Store network passwords d) Connect to a printer

Which protocol is used to send emails? a) FTP b) HTTP c) SMTP d) DHCP

A firewall is used to: a) Speed up the internet b) Protect a network from unauthorized access c) Increase RAM d) Format the hard disk

The default subnet mask for a Class C IP address is: a) 255.0.0.0 b) 255.255.0.0 c) 255.255.255.0 d) 255.255.255.255

For complete solved answers and detailed explanations, our NIOS Class 12 question paper collection and chapter-wise question banks are available through Unnati Education.

Module 5 – Troubleshooting and Maintenance: Important Questions

Problem Diagnosis, Troubleshooting and Maintenance – Important Objective Questions

This is one of the highest-scoring chapters in NIOS 663. Here are the most important sample questions.

POST stands for: a) Power On Self Test b) Power Output System Test c) Primary Operating System Test d) Program On Start Test

A beep sound during startup usually indicates: a) Successful boot b) A hardware error c) Network connection issue d) Software crash

Which tool is used to clean a computer from inside? a) Damp cloth b) Compressed air can or blower c) Water d) Liquid cleaner

Overheating in a computer is most commonly caused by: a) Excess RAM b) Faulty CPU fan or dust accumulation c) Too many USB devices d) Using NTFS file system

A Blue Screen of Death (BSOD) in Windows usually indicates: a) A software licensing issue b) A serious system or hardware error c) A network failure d) A display driver update

New Trends in Computing – Important Objective Questions

This chapter covers modern developments in the computing world. Here are some important questions.

Cloud computing refers to: a) Storing data on a physical hard disk b) Delivering computing services over the internet c) Using only offline software d) Installing software on local machines only

IoT stands for: a) Internet of Technology b) Internet of Things c) Input Output Technology d) Integrated Output Terminal

Artificial Intelligence (AI) in computers is used for: a) Only data storage b) Simulating human intelligence and decision-making c) Replacing RAM d) Formatting hard disks

Which of the following is a cloud storage service? a) MS Paint b) Google Drive c) Notepad d) Task Manager

Virtual Reality (VR) is used for: a) Storing large files b) Creating simulated 3D environments for users c) Antivirus protection d) Printing documents

Module 6 – Workplace and Professional Skills: Important Questions

Engage with Customers – Important Objective Questions

This chapter focuses on how computer hardware technicians should interact with customers. Here are important sample questions.

When a customer reports a technical problem, the first step is to: a) Start repairing immediately b) Listen carefully and understand the problem c) Ask the customer to leave d) Restart the computer immediately

Effective communication with a customer means: a) Using technical jargon always b) Speaking clearly and in simple language c) Ignoring their queries d) Replying only in writing

A customer feedback form helps a technician to: a) Sell more products b) Understand service quality and improve performance c) Avoid warranty issues d) Format customer data

Coordinate with Colleagues – Important Objective Questions

This chapter is about professional teamwork and workplace communication. Here are some key questions.

Coordinating with colleagues in a technical team means: a) Working only independently b) Sharing information and supporting each other to complete tasks c) Ignoring team meetings d) Taking all credit alone

A work order in a computer hardware service center is used to: a) Record daily attendance b) Document tasks assigned and completed for each job c) Manage payroll d) Install software

Team briefings in a hardware maintenance unit help to: a) Waste time b) Align everyone on the work schedule and goals c) Replace customer interaction d) Format computers

Why Solving Objective-Based Important Questions Improves Scores in Computer Hardware?

Many students focus only on theory and skip practicing objective questions. This is one of the biggest mistakes in NIOS exam preparation. The objective section in NIOS Computer Hardware Assembly and Maintenance 663 carries significant marks, and practicing chapter-wise MCQs helps in multiple ways.

When you repeatedly practice these questions, your brain retains key concepts faster. You also become familiar with how questions are framed in the NIOS exam. This reduces exam time pressure because you already know what to expect. Students who practice objective questions score 15 to 25 percent higher than those who only read theory. Our question bank is built to give you exactly this advantage.

Are These Important Questions Based on the Latest 2026 NIOS Exam Pattern?

Yes, all the questions in this bank are prepared according to the 2026 NIOS exam pattern. NIOS updates its question format from time to time, and at Unnati Education, we keep our content updated with every change. These questions match the current NIOS 663 curriculum and include the types of questions that have been most frequently asked in past exams.

Do These Important Questions Cover Hardware, Installation, Networking, and Troubleshooting Concepts?

Yes, this question bank covers all six modules of the NIOS Computer Hardware Assembly and Maintenance 663 syllabus. It includes questions from hardware components, system architecture, OS installation, networking basics, network configuration, troubleshooting, new computing trends, and workplace skills. Every chapter from the NIOS 663 index is covered with sample objective questions.

Most Repeated Objective Questions in NIOS Computer Hardware Exams

Based on previous year question papers, the following topics have repeatedly appeared in NIOS Computer Hardware 663 exams.

The concept of POST and BIOS settings appears almost every year. Questions on assembling a PC, SMPS, and motherboard components are very common. Networking questions including LAN, WAN, IP addresses, and routers frequently appear. Troubleshooting questions about BSOD, hardware errors, and beep codes are highly repeated. Cloud computing and IoT questions have become increasingly common in recent years.

Important Practical-Concept Questions (High-Scoring Area)

Some questions in NIOS 663 are based on practical concepts that students often ignore. These include questions about how to use a multimeter during hardware repair, how to apply thermal paste correctly, how to set the boot order in BIOS before OS installation, and how to use compressed air to clean internal components. These practical-concept questions are included in our question bank with proper answers and explanations.

Important Definitions and Short Answer Questions (2 to 3 Marks Focus)

Along with objective questions, students should also know key definitions for terms like BIOS, SMPS, POST, LAN, RAM, ROM, CPU, NTFS, and DNS. These definitions are often asked in 2 to 3 mark questions. Understanding what these terms mean also helps in answering objective questions correctly.

Important Scenario-Based Troubleshooting Questions

NIOS 663 exams also include scenario-based questions where a situation is described and you have to identify the problem or suggest a solution. For example: A computer is not starting and is making a continuous beep sound. What is the likely issue? Or: A computer connected to a network cannot access the internet. What should be checked first? These types of questions test your practical understanding and are covered in our question bank.

Hardware Diagram and Component Identification Questions

Some objective questions ask students to identify components from descriptions or basic diagrams. For example, questions about identifying the PCIe slot, the CPU socket, the SATA connector, or the RAM slot on a motherboard are common. Our question bank prepares students for these identification-based questions as well.

Common Mistakes Students Make While Preparing Computer Hardware Assembly

• The most common mistake is skipping the practical modules and only studying theory.
• Another mistake is not practicing objective questions regularly.
• Many students also ignore the networking and workplace skills modules thinking they are less important. In reality, these modules carry good marks in the exam.
• Students also make the mistake of not revising data representation and binary conversion topics, which are regularly asked in objective format.
• Using our NIOS Class 12 TMA resources along with this important question bank gives a more complete preparation.

Who Should Use This Important Question Bank?

This question bank is ideal for NIOS Class 12 students appearing in the 2026 board exams. It is also useful for students who have gaps in their preparation and want to focus on the most important topics. Students who are short on time and want to revise quickly will find this resource especially helpful. Anyone who wants to score well in the objective section of NIOS 663 should use this chapter-wise question bank.

About Unnati Education – NIOS Support Since 2010

Unnati Education has been supporting NIOS students since 2010. We understand the NIOS exam pattern in depth and provide resources that are accurate, updated, and student-friendly.

At Unnati Education, we offer NIOS Previous Year Papers, Solved TMAs, Practical Files, and well-structured Notes for all subjects including Computer Hardware Assembly and Maintenance 663. Our content is always aligned with the latest NIOS guidelines so students do not waste time on outdated material.

Our team ensures real-time updates on assignment deadlines, exam schedules, and important notifications. We are available on WhatsApp and phone to provide personalised support to every student.

How to Get Complete Answers and Study Material for Computer Hardware Assembly and Maintenance (663)

This page contains sample objective questions from every chapter. The complete solutions with explanations for all chapter-wise objective questions are available through our important questions booklet. This booklet is specially prepared by Unnati Education and includes accurate answers for every question in this bank.

If you want the complete solutions booklet, previous year question papers for NIOS 663, or any other NIOS Class 12 study support, you can reach out to us directly. We also assist students in accessing the right study material at the right time.

Contact Unnati Education: Phone and WhatsApp: 9654279279 or 9899436384

Frequently Asked Questions (FAQs)

Are these NIOS Class 12 Computer Hardware Assembly and Maintenance 663 important questions enough to score good marks?

Yes, these important questions cover all the major chapters and concepts that are most likely to appear in the 2026 NIOS exam. When you combine this question bank with regular revision and proper understanding of each concept, your chances of scoring well in the objective section increase significantly. For full solutions, contact Unnati Education.

Can I get the complete solutions for all these objective questions?

Absolutely. The complete solution booklet for NIOS Class 12 Computer Hardware Assembly and Maintenance 663 important questions is available through Unnati Education. It contains accurate, easy-to-understand answers for every chapter. You can contact us on WhatsApp at 9654279279 or 9899436384 to get the booklet and start your preparation with confidence.

Are these questions updated for the 2026 NIOS exam pattern?

Yes, all questions in this bank are updated and aligned with the latest 2026 NIOS exam pattern. Our team at Unnati Education regularly reviews and updates content based on the most recent NIOS curriculum and previous year exam trends, so students always get the most current and relevant material for their preparation.

Which chapters in NIOS 663 are most important for objective questions?

Chapters covering computer components, assembling a PC, operating system installation, network basics, and troubleshooting are the most heavily tested in objective format. Data representation topics including binary and hexadecimal conversions are also regularly asked. New trends in computing such as cloud computing and IoT have also been increasingly tested in recent NIOS exams.

How is Unnati Education different from other NIOS study platforms?

Unnati Education has been serving NIOS students since 2010 with high-quality, exam-focused resources. We provide solved TMAs, practical files, previous year papers, and chapter-wise important questions that are all aligned to the latest NIOS guidelines. Our personalised WhatsApp support ensures every student gets help when they need it most, which makes our service reliable, trusted, and result-oriented.