| what is a translator? | program which translates a program written by user into machine code |
| what does compiler do? | it translates program written in HLL into machine code. When compiled, code can be executed repeatedly without recompiling it |
| how are compiler different from interpreter? | -translates in one go
-1 HLL statement can be translated into several machine code
-general use |
| what does interpreter do? | translates program written in HLL into machine code, one line at a time |
| how is interpreter different from compiler? | -one statement at a time
-no executed files
-slower |
| what is a program? | list of instruction to perform certain task |
| what are 2 types of program? | HLL, LLL |
| what are 2 examples of HLL | python, Java |
| what are examples of LLL | machine code, assembly language |
| what are benefits of HLL? | 1. easier to read and understand
2. less time to write
3. easier to find errors
4. portable |
| what are benefits of LLL? | 1. runs quicker
2. make use of special hardware
3. doesn't take up space in primary memory |
| what are buffers? | 1. temporary memory
2. to speed things up. Hardware slow compared to processor
3. data from processor sent to hardware and stored in buffer. So processor can continue other task |
| what are interrupts? | 1. a signal sent from device or software to processor
2. signal stops job of processor. When receive interrupt, processor either continues or stops
3. allow computer to perform multiple task
4. when interrupt is serviced, status of currently running task is saved by interrupt handler |
