3 - Compilers and Interpreters

Question 1

What’s the difference between a compiler, assembler and interpreter?

Answer 1

• Compilers translate from HILL to machine code.
• Assemblers translate mnemonic machine instructions (like MOV, ADD) to binary code.
• Interpreter acts like a compiler but never translates to binary, it just analyses, works out your intentions and executes.

Question 2

What advantage does a compiler have over an interpreter?

Answer 2

It’s much faster.

Question 3

What advantage does a interpreter have over an compiler?

Answer 3

• Platform independent
• More suitable for rapid prototyping and when the program is frequently modified.
• Easier to debug.
• Easier to make and use

Question 4

What comprises does one have to choose between when deciding between a compiler and an interpreter?

Answer 4

A compromise between speed and ease of use.

Question 5

What ‘code’ does Java compiler to?

Answer 5

Java compiles to ‘Byte’ code.

Java Virtual Machine (JVM) uses both a compiler and interpreter.

Question 6

What compiler does C use?

Answer 6

Just in Time (JIT) ?

Question 7

Can can you reuse exsiting proven software?

Answer 7

Essentially by using libraries:

• source-level subroutines and macro libraries
• pre-translated relocatable binary libraries
• dynamic libraries and dynamic linking