Revision Homework

Revision Homework

1. Robust Software

   • Ability for computer system to cope with errors during execution
   • Ways to make a program more robust
     • Data validation
     • Error catching techniques
   • Identifying Vulnerabilities
     • Audit Trails
       • A record of what has been done: Aids in restoring a system to a previous state
     • Code Reviews
       • Checks of source code by other programmers: Helps identify bad programming practice and vulnerabilities in the code

2. Characteristics of different programming languages

   • Originally code written in binary on pieces of tape
   • Assembly language: Simple commands easily translated into the computer's language
   • Old programs written in low level languages
     • Today most programs written in high level languages
       • Translated by compiler to machine code
     • Used for embedded systems
     • Translated by assembler to machine code
   • Machine code
     • Binary representation of instructions CPU can understand