Is the binary code ? = {0, 01, 011, 111} uniquely decodable? How should the receiver react on receiving a sequence starting 0111 … 1 … ?

We are given a number 0b1100_0000 represented in a 8-bit system. Prob 2. Answer the following questions: . What is the value in decimal if this is an unsigned number? . What is the value in decimal if this is a signed number? • If we extend (type case) this number to a 16-bit system as an unsigned number, what will it be in hexadecimal? • If we extend (type case) this number to a 16-bit system as a signed number, what will it be in hexadecimal?

When the result of an unsigned arithmetic operation is too big to fit into the destination, what flag is set?

Match the following counting problems with their answers. The number of different 4- digit PIN numbers. The number of telephone numbers that starts with 912-344- The number of bit strings of length 6 that starts with 0 or starts with 10. The number of bit strings of length 6. 1. 64 2. 48 3. 1000 4. 9999 5. 10000

In AES cryptography, what is the rationale for the bit scrambling step that is used for finding the replacement byte that goes into each cell of the S-box table?

"Rabenstein code was used to send a message with 4 information bits, you receive 100110001 , if you can expect at most one bit of corruption, what were the original information bits?

choose the correct answer

6. The sender sends the following message 00111001011 to the receiver. Using the vertical redundancy check, add the parity bit that will show the string has an error using an even number of ones. Answer:

Please explain step by step:Let e = 2.71828183 be the Euler’s number with 8 decimal digits of precision.Find the binary scientific notation of e with five bits after the binary point; i.e. find integer n and bits x1, x2, . . . , x5 such that e = 1.x1x2x3x4x5 × 2 n .Find the single-precision IEEE 754 representation of e. (Hint: Round the result of 223e to the closest integer like m. Convert m to its normalized binary scientific notation and round its fraction to 23 bits after the binary point. Finally, find the normalized binary scientific notation of m/2 23 by subtracting 23 from the power of two in the representation of m).