Problem 15
How many bytes of storage space would be required to store a 20 -page document containing details of employees, in which each page contains 100 records and every record is of 200 characters, if two-byte Unicode characters were used?
Problem 16
In zoned-bit recording, why does the rate of data transfer vary depending on the portion of the disk being used?
Problem 18
Suppose a disk storage system consists of 5 platters with 10 tracks on each side and 8 sectors in each track. What is the capacity of the system? Assume every sector contains 512 bytes and data can be stored on both surfaces of each platter.
Problem 20
The following two messages are encoded in ASCII using one byte per character and then represented in hexadecimal notation. Are both the messages same? \(436 \mathrm{~F} 6 \mathrm{D} 7075746572436 \mathrm{~F} 6 \mathrm{D} 7075736572\)
Problem 21
Encode the following sentences in ASCII using one byte per character. a. Is 1 byte \(=8\) bits? b. Yes, a byte contains 8 bits!
Problem 23
List the hexadecimal representations of the integers from 20 to 22.
Problem 24
a. Write the number 100 by representing 1 and 0 in ASCII. b. Write the number 255 in binary representation.
Problem 25
What values have binary representations in which only one of the bits is 1 ? List the binary representations for the smallest six values with this property.
Problem 26
Convert each of the following hexadecimal representations to binary representation and then to its equivalent base 10 representation: a. OxA b. \(0 \times 14\) c. \(0 \times 1 E\) d. \(0 \times 28\) e. \(0 \times 32\) f. \(0 \times 3 \mathrm{C}\) g. \(0 \times 46\) h. \(0 \times 65\) k. \(0 \times 194\) 1\. \(0 \times \mathrm{CA}\)
Problem 27
Convert each of the following base 10 representations to its equivalent binary representation: a. 110 b. 99 c. 72 d. 81 e. 36
