Section 4 Chapter 22 - Programming Language Translators

Question 1

Assembler

Answer 1

A program that translates assembly language into machine code

Question 2

Names of the input and output of an assembler

Answer 2

Source code and object code

Question 3

Compiler

Answer 3

A program that translates a high level language into machine code

Question 4

Why different platforms need different compilers

Answer 4

Because the object code that is produced is hardware specific

Question 5

Interpreter

Answer 5

A programming language translator that translates each line of source code into object code and executes it, one line at a time. However the interpreter may check for syntax errors in the entire source code before running

Question 6

Bytecode

Answer 6

A type of code that is obtained by compiling a program. It is not machine code and is platform independent.

Question 7

How bytecode is run

Answer 7

It is executed by a bytecode interpreter

Question 8

Advantages of bytecode (2)

Answer 8

• Platform independent

- Secure

Question 9

Advantages of a compiler (4)

Answer 9

• The object code can be saved and run without recompiling the source code
• Object code executes faster than interpreted code
• The object code can be distributed without the compiler being present
• The object code is more secure as it is hard to understand

Question 10

Advantages of an interpreter (2)

Answer 10

• It is useful for programming as there is no need for lengthy recompilation each time an error is found
• It is easier to partially test and debug programs`

Question 11

Where interpreters are useful

Answer 11

Debugging and developing a program

Question 12

Where compilers are useful

Answer 12

For running a program fast