AMU 2026 — Computer PYQ

1. What is a Check Figure? A check figure (such as a parity bit, checksum, or Cyclic Redundancy Check (CRC) bits) is a redundant value calculated from the block of data bits being transmitted. Its purpose is to verify data integrity and discover if bits were flipped or corrupted during transit.

2. Role of the Transmitting Computer (Sender):

   • Before sending data, the transmitting computer runs the data bits through a mathematical algorithm to calculate the check figure.

   • It appends this check figure value to the end of the data payload block and transmits both over the network channel.

3. Role of the Receiving Computer (Receiver):

   • Upon receiving the transmission, the receiving computer isolates the data block and recalculates the check figure locally using the exact same algorithm.

   • It then compares its newly calculated check figure with the check figure sent by the transmitter. If they match, the data is accepted; if they don't, a transmission error has occurred.

4. Why Option (a) is Incorrect:

   • Start and stop bits are control flags used exclusively in asynchronous serial transmission for character synchronization (framing), not for calculating complex error-checking algorithms.

Conclusion:

Since both the transmitting computer and the receiving computer must independently calculate the check figure to verify data integrity, the correct selection is (d).