Sync error

arduino-builder/arduino-builder -compile -core-api-version 10611 -build-path /tmp/507775860 -hardware arduino-builder/hardware -hardware arduino-builder/packages/cores -tools arduino-builder/tools -tools arduino-builder/packages/tools -built-in-libraries arduino-builder/latest -libraries /tmp/316972191/pinned -libraries /tmp/316972191/custom -fqbn arduino:avr:uno -build-cache /tmp -verbose=false /tmp/316972191/Blink

Sketch uses 928 bytes (2%) of program storage space. Maximum is 32256 bytes.

Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.

Flashing with command:C:/Users/pp/.arduino-create/arduino/avrdude/6.3.0-arduino9/bin/avrdude.exe -CC:/Users/pp/.arduino-create/arduino/avrdude/6.3.0-arduino9/etc/avrdude.conf -q -q -patmega328p -carduino -PCOM4 -b115200 -D -Uflash:w:C:/Users/pp/AppData/Local/Temp/arduino-create-agent624420665/Blink.hex:i

avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00

avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00

avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x00

avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0xe1

avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x00

avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x00

avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x00

avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x00

avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x00

avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x00

Executing command: exit status 1

What is this Error..? Please explain how to fix it..?

What is this Error.

It means your computer is not talking to the Arduino or the Arduino is not talking back.

It can be caused by not choosing the correct Arduino from the tools menu, selecting the wrong serial port or having a faulty Arduino.