Paper 1 Exam Practice

What is the largest hexadecimal number that can be stored in a 12-bit register?

• FFF

• 1A3

• 429

• 1000

What is the largest denary number that can be stored in a 12-bit register?

• 4095

• 1023

• 2047

• 8191

Convert the hexadecimal code "429" into a 12-bit binary number.

• 010000101001

• 100001010010

• 001010010001

• 110010010001

Convert the hexadecimal code "1A3" into a 12-bit binary number.

• 000110100011

• 001101000011

• 110010100011

• 010110100011

Convert the binary number "100010100001" into a hexadecimal number.

• 8A1

• 1A3

• 429

• FFF

Convert the binary number "011100001011" into a hexadecimal number.

• 70B

• 1A3

• 429

• FFF

Which of the following is NOT a method for transmitting data?

• Serial

• Simplex

• Parallel

• Parity

What is the name of the unit that data is broken down into for transmission between devices?

• Packets

• Frames

• Bits

• Segments

What is the purpose of encryption in data transmission?

• To compress data for faster transmission

• To ensure data is transmitted without errors

• To protect data from unauthorized access

• To convert data into a readable format

How does symmetric encryption work in data transmission?

• It uses a single key for both encryption and decryption.

• It uses different keys for encryption and decryption.

• It encrypts data using a public key and decrypts it using a private key.

• It converts data into packets for secure transmission.