If the Pico is plugged connected to a computer by a USB cable, what voltage(s) should you read on pin 40 and pin 36, respectively? OV (or Gnd) 5V and 3.3 V 3.3 V and 5 V Something in between 1.8 V - 5.5 V 3.3 V Undefined

A microcontroller is used to interface an AC load through a relay. L1 20V U1 RAOC12NO-AND RAIC1NJANT RCCTPLSPIACOPITSOANI4 RAZCZNANDDACOUTIVREF. RASCINANDVRE RAACIOUTSRGTOCH RASK2OUTSRNOSSIALVOANA RASICLKOOSC2 RATCLOSCI RC1P2ACCP26osa D1 RCSOISCLIANIS SV RCASDISDALANI6 RCSSDOLANI7 RCBTXICKTONI OE R2 22 220V AC 200 RDICCPASD2SDAAN21 21 ROOEAN2 REONTOFLTOSRANI2 RB1NTIC12N3-JAN1O REONTICTED1IAN REOCTEDOPRAJOCP2C12N0ANG 10K Q1 2 ROP2CISSAN23 20 RDAP2DISDORAN24 ROGPICITKZIOKZIANCS RBSKOCIPSACCPITICHITIOANI REGAOCZPOC R1 10K PEDPJACOPSIANS www.studenteompanion.co.za REIPBIANE 10BEZCOPSIAN7 MOLRIVPPRE) RESET www.studentoompanion.ne 1. List the different types of interfacing used in this circuit? 2. What is the role of D1 and Q1? 3. Can the 220V AC source affect the microcontroller? Why? 4. What is the current gate of transistor Q1 (VBE is 0.7)?

Your friend has just bought a new personal computer. She tells you that her new system runs at 1GHz, which makes it more than three times faster than her old 300MHz system. What would you tell her? (Hint: Consider how Amdahl’s Law applies.)

A 32-bit computer has two selector channels and one multiplexor channel. Each selector channel supports two hard disks and two DVDs units. The multiplexor channel has two printers connected to it. Assume the following transfer rates.             Disk drive                               900 Kbytes/s             DVD drive                              800 Kbytes             Printer                                     100 Kbytes/s Estimate the maximum aggregate I/O transfer rate in this system.    Show how you estimate.