Write short note onSoftware tools System Programming and Compiler Construction Sem 6 Mumbai University May 2015

We are building EduLadder(ELADR) - Protocol

The Eladr Protocol is a decentralized, security and efficiency enhanced Web3 noSQL database powered by IPFS as the data storage layer https://ipfs.io/, and the Cardano block chain as the rewards token platform, https://cardano.org/. It provides a JSON based, IPFS layer 2 solution for data indexing and retrieval in an 'append only' file system built with open source Node.js API libraries.

The ELADR token was designed to incentivize and reward community members as a proof of contribution. Token holders are also granted access to EduLadder.com premium features as well as associated ELADR token enabled apps.

WHITE PAPER Buy Now Try BETA

Real Problems! Real Experts!

Join Our Telegram Channel !

The Eduladder is a community of students, teachers, and programmers. We help you to solve your academic and programming questions fast.
In eduladder you can Ask,Answer,Listen,Earn and Download Questions and Question papers.
Watch related videos of your favorite subject.
Connect with students from different parts of the world.
Apply or Post Jobs, Courses ,Internships and Volunteering opportunity. For FREE
See Our team
Wondering how we keep quality?
Got unsolved questions? Ask Questions

GATE GMAT CBSE NCERT Career Interview Railway UPSC NID NIFT-UG NIFT-PG PHP AJAX JavaScript Node Js Shell Script Research

UNIX-SYSTEMS-PROGRAMMING-AND-COMPILER-DESIGN-LABORATORY-10CSL68--->View question

Write short note on:Software tools -System Programming and Compiler Construction-Sem 6-Mumbai University-May 2015

It is related to system programming and compiler construction.

Asked On2017-12-19 15:49:41 by:leo

Taged users:
Meghna vinay-s-m-gowda

Likes:
Be first to like this question

Dislikes:
Be first to dislike this question
Talk about this Like Dislike

View all questions

Answers

Systems Software consists of a set of programs that support. The operation of a computer system and help, the programmer, to simplify the programming process and run application software efficiently.

1. Translator

-A Translator is a system program that converts a program in one language to a program in another language.

-A Translator can be denoted by following symbol:

STTB

Where S = Source Language

T = Target Language

B = Base Language in which the translator is written

2.Assembler

Assembler is a language translator which takes as input a program in assembly language of machine A and generates its equivalent machine code for machine A, and the assembler itself is written in assembly language of Machine A.

3.Cross Assembler

-A Cross-Assembler runs on one machine, but assembles ALP of another machine and generates machine code for that machine.

-Imagine an ALP program (the actual assembler) running on a Windows machine. It takes as input some 8086 ALP program and generates its machine code for 8086 machine. But the main assembler still runs on Windows machine, even though source and target languages are of a backward processor 8086. Example: TASM programs running.

4.Disassembler

As the name suggests, it converts machine code of a particular machine back to its assembly language. (Recall: reverse engineering).

This idea of reverse engineering is used to recover some lost source code file using its object file.

5.Compiler

A Compiler is a language translator that takes as input a source program in some HLL and converts it into a lower-level language (i.e. machine or assembly language).

So, an HLL program is first compiled to generate an object file with machine-level instructions (i.e. compile time) and then instructions in object file are executed (ex: run time).

6.Cross-Compiler

A Cross-Compiler runs on one machine, but generates machine or assembly code for another machine.

7.Decompiler

-Similar to Disassembler for Assembly Language, a Decompiler traces back the machine or assembly code and converts it into source HLL program.

-This reverse conversion is strictly dependent on how much information about source HLL is present in the machine code (or assembly code).

8.Interpreters

-An Interpreter is similar to a compiler, but one big difference is that it executes each line of source code as soon as its equivalent machine code is generated. (This approach is different from a compiler, which compiles the entire source code into an object file that is executed separately).

-If there are any errors during interpretation, they are notified immediately to the programmer and remaining source code lines are not processed.

-In case of a Compiler, all errors occurred during compile-time are notified collectively to the programmer; the programmer then corrects the errors and re-compiles and executes the code.

-The main advantage with Interpreters is that, since it immediately notifies an error to the programmer, debugging becomes a lot easier.

9.Pre-processors

-A Pre-processor converts one HLL into another HLL.

-Typically pre-processors are seen as system software used to perform some additional functions (such as removal of white spaces and comments) before the actual translation process can begin.

-So, input and output of pre-processor is generally the same HLL, only some additional functions have been performed on the source.

-A Macro Processor is an example of pre-processor.

10.Macro Processor

-A Macro is defined as a single-line abbreviation of a small sequence of statements.

-A Macro Processor expands the macro calls and removes macro definitions from an as input source code, which contains these macro definitions and calls.

-Macros are used similar to functions, but they are much smaller (and less complex) than functions.

11.Linker

-A Linker (or a Linkage Editor) takes the object file, loads and compiles the external sub-routines from the library and resolves their external references in the main-program.

-A Compiler generates an object file after compiling the source code. But this object file cannot be executed immediately after it gets generated.

-This is because the main program may use separate subroutines in its code (locally defined in the program or available globally as language subroutines). The external sub-routines have not been compiled with the main program and therefore their addresses are not known in the program.

Answerd on:2018-06-06 Answerd By:aksingh1818

Likes:
|aksingh1818

Dislikes:
Be first to dislike this answer
Talk about this Like Dislike

Lets together make the web is a better place

We made eduladder by keeping the ideology of building a supermarket of all the educational material available under one roof. We are doing it with the help of individual contributors like you, interns and employees. So the resources you are looking for can be easily available and accessible also with the freedom of remix reuse and reshare our content under the terms of creative commons license with attribution required close.

You can also contribute to our vision of "Helping student to pass any exams" with these.
Answer a question: You can answer the questions not yet answered in eduladder.How to answer a question
Career: Work or do your internship with us.Work with us
Create a video: You can teach anything and everything each video should be less than five minutes should cover the idea less than five min.How to upload a video on eduladder

Welcome to Eduladder V 4.0

Ads

Write short note on:Software tools -System Programming and Compiler Construction-Sem 6-Mumbai University-May 2015

It is related to system programming and compiler construction.

Similar Questions

Notes