ICT Revision MCQ Series (AL Grade 12) . 3 Number System and Data Representation 

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ICT Revision MCQ Series – Master Your Knowledge with Interactive Questions

Introduction In today’s fast-paced learning environment, multiple-choice questions (MCQs) have become a powerful tool for quick revision and self-assessment. Our Revision MCQ Series is designed to help students reinforce their understanding of key concepts through well-structured MCQs.

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ICT Revision MCQ Series AL lesson 3 . Number System and Data Representation

ICT Revision MCQ Series

This quiz assesses your knowledge of Grade 12  ICT lessons and serves as a revision test for your A/L examination preparation. It helps reinforce key concepts and improve your understanding of important ICT topics.

Perfect for:

  • Sri Lankan AL ICT students revising core concepts.
  • Building a strong foundation for exams and practical applications.

Good luck! 🖥️📊

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Category: Revision MCQ AL Grade 12 Lesion 3

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For a system encoding the character ‘A’ in ASCII, which represents the input, process, and output?

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Category: Revision MCQ AL Grade 12 Lesion 3

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Match the bitwise operations with their outcomes for inputs 1010 and 1100: (a) AND (1) 1110 (b) OR (2) 1000 (c) XOR (3) 0110 (d) NOT (1010) (4) 0101

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What is the primary number system used to represent data in digital devices?

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Category: Revision MCQ AL Grade 12 Lesion 3

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For a system converting 101101 (binary) to octal, which represents the input, process, and output?

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Which cannot be achieved using bitwise AND operations?

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Category: Revision MCQ AL Grade 12 Lesion 3

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Binary arithmetic and logical operations are essential in computing. In binary addition, __ is used to handle carryovers. Bitwise __ operations are used for masking bits. For subtraction, __ representation simplifies the process. Logical operations like __ are used in error detection.

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Category: Revision MCQ AL Grade 12 Lesion 3

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A program performs a bitwise OR operation on 10110 and 01101 to set flags. What is the result?

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A student converts the binary number 1101 to hexadecimal and gets 1D. What is the correct hexadecimal value?

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Which cannot be achieved using bitwise XOR operations?

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Category: Revision MCQ AL Grade 12 Lesion 3

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A student converts -9 to 6-bit one’s complement and gets 110110. What is the correct representation?

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Category: Revision MCQ AL Grade 12 Lesion 3

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Which cannot be directly achieved using ASCII character encoding?

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Category: Revision MCQ AL Grade 12 Lesion 3

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Character encoding is crucial in computing. In ASCII, __ bits are used to represent characters. __ encoding supports multilingual text. __ is used in IBM mainframes. __ encodes decimal digits with 4 bits.

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Category: Revision MCQ AL Grade 12 Lesion 3

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Number systems are critical in computing. __ is used for CPU operations. __ is used for compact memory addressing. __ simplifies negative number arithmetic. __ is less common but used in early systems.

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Category: Revision MCQ AL Grade 12 Lesion 3

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Match the character representation schemes with their descriptions: (a) ASCII (1) Supports multilingual characters (b) Unicode (2) 7-bit encoding for English characters (c) EBCDIC (3) Used in IBM mainframes (d) BCD (4) 4-bit encoding for decimal digits

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Category: Revision MCQ AL Grade 12 Lesion 3

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A program needs to represent -42 in a 7-bit signed magnitude format. Which is the correct representation?

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Category: Revision MCQ AL Grade 12 Lesion 3

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Which cannot be directly represented using signed magnitude in a 4-bit system?

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Category: Revision MCQ AL Grade 12 Lesion 3

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Which statements correctly describe number system conversions in computers? (a) Binary to hexadecimal conversion groups bits into sets of 4. (b) Octal is more compact than binary for representing large numbers. (c) Decimal is the primary number system for CPU operations. (d) Hexadecimal is used for memory addressing due to its compactness.

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Category: Revision MCQ AL Grade 12 Lesion 3

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A student performs 10111 - 01110 in binary and gets 01101. What is the correct result?

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A student converts 25 (decimal) to binary and gets 11001. What is the correct binary value?

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Match the number systems with their uses: (a) Binary (1) Compact memory addressing (b) Hexadecimal (2) CPU operations (c) Octal (3) Early UNIX systems (d) Decimal (4) Human-readable input

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Category: Revision MCQ AL Grade 12 Lesion 3

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(a) ASCII: Limited to 128 characters for English text. (b) Unicode: Supports global languages with variable-length encoding. (c) EBCDIC: Used for modern web applications. (d) BCD: Encodes decimal digits for numerical displays. (e) Unicode: Not backward-compatible with ASCII. Choose the correct statements.

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Category: Revision MCQ AL Grade 12 Lesion 3

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(a) AND: Used for masking bits. (b) XOR: Used for toggling bits. (c) OR: Used for clearing bits. (d) NOT: Inverts all bits. (e) AND: Used in error detection. Choose the correct statements.

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Category: Revision MCQ AL Grade 12 Lesion 3

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(a) Binary: Used for all digital data representation. (b) Octal: Compact representation for binary numbers. (c) Hexadecimal: Used for character encoding only. (d) Two’s complement: Simplifies signed integer arithmetic. (e) Signed magnitude: Has two representations for zero. Choose the correct statements.

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Which statement correctly distinguishes between binary and hexadecimal number systems?

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What is the primary method used to represent negative numbers in modern computers?

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For a system performing binary addition of 1011 and 1101, which represents the input, process, and output?

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Category: Revision MCQ AL Grade 12 Lesion 3

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A memory address is given as 2F in hexadecimal. What is its binary equivalent?

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Category: Revision MCQ AL Grade 12 Lesion 3

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What is the primary character encoding scheme used in modern web applications?

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Category: Revision MCQ AL Grade 12 Lesion 3

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A system needs to store -13 in a 6-bit two’s complement format. Which is the correct representation?

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Category: Revision MCQ AL Grade 12 Lesion 3

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Which statements correctly describe character encoding schemes? (a) ASCII is limited to 128 characters. (b) Unicode supports variable-length encoding for global text. (c) EBCDIC is widely used in modern web browsers. (d) BCD is efficient for alphabetic character encoding.

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Why Use MCQs for Learning? MCQs are a great way to evaluate your understanding of a subject in a structured manner. Here’s why they are effective:

  • Quick and Efficient – MCQs allow for rapid assessment of knowledge.
  • Engaging and Interactive – They keep learning interesting and encourage active participation.
  • Memory Retention – Answering questions enhances recall and reinforces concepts.
  • Instant Feedback – You can immediately check your answers and improve your understanding.

Tips MCQ-Based Exams

To score well in MCQ exams, follow these strategies:

  1. Understand the Concepts – Don’t just memorize answers; understand the logic behind them.
  2. Eliminate Wrong Options – Narrow down choices by eliminating incorrect answers.
  3. Time Management – Avoid spending too much time on one question.
  4. Practice Regularly – Consistent practice improves accuracy and speed.
  5. Read Carefully – Pay attention to tricky words like not, always, and except.

Conclusion

The Revision MCQ Series is your go-to resource for mastering concepts efficiently. Keep practicing with Lesson 1 questions and stay tuned for upcoming lessons. Your success starts with consistent revision and smart study techniques!

FAQs

1. How can MCQs help in learning? MCQs improve retention, provide quick assessment, and make learning engaging.

2. Can I find more lessons in this series? Yes! We regularly update the Revision MCQ Series with new lessons. Stay tuned!

3. How should I prepare for MCQ-based exams? Understand concepts, practice regularly, manage time well, and eliminate wrong answers.

4. Where can I access more MCQs? You can find additional MCQs on our website or in upcoming blog posts.

5. Is this MCQ series suitable for all students? Yes! Whether you’re a beg

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Ruwan
About Ruwan Suraweera 218 Articles
Pilana Vidyarthodaya M. V. ICT Teacher

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