Useful tips for everyday
How to fix ora-01034 Oracle not available? To resolve ORA-01034, be sure that the ORACLE_HOME and ORACLE_SID properly match within the files /etc/oratab or /var/opt/oracle/oratab…
When do you use an AC voltage divider? AC Voltage Divider. The two impedance voltage divider is used often to supply a voltage different from…
How do you make 4 to 20mA? To create the 4 mA signal we need a resistance of 24V/ 4mA = 6000 ohm. The resistance…
What is the purpose of a certificate in encryption? If you were to go by the definition cited by the NIST Computer Security Resource Center,…
How do I get rid of browser hijacker in Chrome? Change your homepage: (at the top right corner of Google Chrome), select “Settings”. In the…
Can Apple Cinema Display work with USB-C? To use an LED Cinema Display with a modern Mac over USB-C, you need an adapter or a…
Which font is best for headings in Word? The recommended fonts are: Arial (not Arial Narrow) Verdana. Calibri. Universe. Helvetica. What font should subheadings be?…
How do you make a column in a data frame numeric? To convert columns of an R data frame from integer to numeric we can…
How do you count occurrences of a string in pandas? To count the number of occurences in e.g. a column in a dataframe you can…
How do I hide information in Google Docs? To hide a sheet: Open a spreadsheet in the Google Sheets app. Tap the sheet you want…