35 minutes. Instant-marked. Unlimited attempts. Each answer is marked as soon as you choose it, with an explanation. Nothing is saved in this course.
P1. The binary number 110 equals:
4 + 2 = 6.
P2. How many patterns can 3 bits hold?
2 × 2 × 2 = 8.
P3. The decimal number 12 in binary is:
8 + 4 = 12, so 1100.
P4. The largest number 4 bits can hold is:
16 patterns, counting from 0, so the largest is 15.
P5. In ASCII, B has the code 66 when A is 65, because:
The capital letters are in order.
P6. A plain English message of 20 characters, at one byte each, takes:
20 × 1 = 20 bytes.
P7. A 20 × 10 image at 3 bytes per pixel is:
200 pixels × 3 = 600 bytes.
P8. 3,600 bytes in bits is:
3,600 × 8 = 28,800.