Instructions:

1. This practice test contains 20 multiple-choice questions on the Number System topic.
2. Each question carries 1 mark.
3. There is no negative marking for incorrect answers.
4. The total time available is 20 minutes.
5. Select the most appropriate answer for each question.
6. Try to solve the questions independently without using external help.
7. Read each question carefully before selecting your answer.
8. After completing the test, review your answers and explanations to identify areas for improvement.
9. This test is designed for basic-level practice in Digital Electronics.