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Computer Science

Is assembly code a high level or low level language?

Low level language

What does an assembler do?

Translates assembly code into machine code

What does a compiler do?

Translates an entire program in high level language into executable machine code (Which is called object code)

Define source code

The plain text that's inoutted into the compiler

Give a feature about object code

It's hardware specific, so will only run in certain environments

What does an interpreter do?

Translates code written in a high level language to machine code

What is different about an interpreter in comparison to a compiler

Translates code line by line before executing

Give advantages of a compiler

- Speed of execution is faster
- It's hard for users to view/edit the original program, so is better for distributing finished programs

- No need for translation at run-time

Give advantages of an interpreter

- Better for debugging programs as it runs line by line so detects errors more easily
- If a small error is found the program doesn't need to be recompiled, which is better when developing and testing the code

- Source code can be run on any machine with an interpreter

How is bytecode interpreted

Using a bytecode interpreter

Under what condition can bytecode be transferred to a machine

The machine must have a bytecode interpreter

Give differences between high and low level languages

High level languages - easier to read
- less memory efficient

- debugging is easier


Low level languages - harder to understand

- more memory eficient

- debugging is more complex

Give advantages of an Assembler

- More memory-efficient
- Speed of execution is faster

- Fewer instructions are needed to accomplish the same result

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