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CS508 GDB Solution BY VUBWN | CS508 100% Correct GDB Solution BY VUBWN | CS508 GDB Solution

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In this course, you have studied several high-level programming languages such as Java and C#. A high-level programming language is that language which is close to human language (e.g., English). All the programs written in high level programming language must be translated into machine language (by using compilers or interpreters etc.) for execution. It is because computer understands only machine language.
A natural question arises that if a computer understands only machine language then why not write all programs directly in machine language rather than high-level language (and then translating afterwards)?
Being a programming language expert, what is your opinion in this regard? Give solid reasons to support your answer.


Answer:

Because computers understand a sequence of (for instance) ‘1010101010’ better than they understand a command such as ‘PRINT’, or its equivalent in hexadecimal numbers. But even machine language is converted to zeros and ones.
The high-level languages, but also machine languages, are used so humans can get a computer to do what it needs to do. But the computer will even convert hexadecimal numbers (‘0F’) to a sequence of zeros and ones.
No one writes programs in machine language. Normal binary executables are not just machine code anyway, so it would be pointless to try and do this. Binaries contain machine code but include specific, OS dependent formatting.
For example, linux uses ELF. This format is understood by the linker and loader (on *nix, the loader is part of the kernel). The only place unadulterated machine code exists is in the system memory.
You can write programs in assembly language, which is very similar to machine language, but then this must be compiled and linked. In other words, it is the same thing as writing a program in any other compiled language.
 Reasons Not Choosing Machine Language
• It is machine dependent i.e. it differs from computer to computer.
• It is difficult to program and write.
• It is prone to errors
• It is difficult to modify.

 Why to Choose High Level Language
1. High level languages are programmer friendly. They are easy to write, debug and maintain.
2. It provide higher level of abstraction from machine languages.
3. It is machine independent language.
4. Easy to learn.
5. Less error prone, easy to find and debug errors.
6. High level programming results in better programming productivity.



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