IGCSE COMPUTER SCIENCE: DATA TRANSMISSIONS EXAM QUESTIONS AND ANSWERS

IGCSE COMPUTER SCIENCE: DATA
TRANSMISSIONS EXAM QUESTIONS
AND ANSWERS
What is data transmission?(1) - Answer--The movement of data from one place to
another

What is serial data transmission?(2) - Answer--Data is transmitted one bit at a time
-Uses a single wire

Name 3 uses of serial data transmission(3) - Answer--USB

-Medium to long distances

-Transmission to another computer or device

What is parallel data transmission?(2) - Answer--Data is transmitted in multiple bits at a
time.

- Uses multiple wires

Name 3 uses of parallel data transmission(3) - Answer--Short distances

-Fast transmission within a computer system

-Integrated circuits

What is duplex data transmission?(2) - Answer--Two-way data transmission

-Sender and receiver can send data at the same time

What is simplex data transmission?(1) - Answer--One-way data transmission

What is half-duplex data transmission?(4) - Answer--Two way communication

-Sender and receiver cannot send and receive data at the same time.

name 1 use of simplex data transmission - Answer-computer to printer

name 1 use of duplex data transmission - Answer-telephone call

what is automatic repeat request (ARQ) ? (3) - Answer-- Error detection method.