CW-4

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Across
  1. 1. unique identifier key for a record in a database table
  2. 3. a cmd used to retrieve data from a database table in SQL
  3. 4. the process of converting analog signals to digital signals
  4. 5. a linux cmd to modify existing database tables
  5. 7. a cmd create an empty file in linux
  6. 8. a term which describes a piece of code that can be reused in different parts of a program
  7. 9. a type of computer memory that can be accessed quickly
Down
  1. 2. computer's main circuit board, housing the CPU and other essential components.
  2. 3. the process of ensuring that software or hardware is free from vulnerabilities.
  3. 6. in networking, what device is used to forward data packets between computer networks