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NIELIT 2018-62

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Among all given option, ____ must reside in the main memory.

  1. Assembler
  2. Compiler
  3. Linker
  4. Loader
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→ A loader is the part of an operating system that is responsible for loading programs and libraries.
→ It is one of the essential stages in the process of starting a program, as it places programs into memory and prepares them for execution.
→ Loading a program involves reading the contents of the executable file containing the program instructions into memory, and then carrying out other required preparatory tasks to prepare the executable for running.
→ Once loading is complete, the operating system starts the program by passing control to the loaded program code.
Note: The loader is a program that loads the object program from the secondary memory into the main memory for execution of the program
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Previous year GATE question.

Loader is a program that loads machine codes of a program into the system memory.In Computing, a loader is the part of an Operating System that is responsible for loading programs. It is one of the essential stages in the process of starting a program. Because it places programs into memory and prepares them for execution. Loading a program involves reading the contents of executable file into memory.  Once loading is complete, the operating system starts the program by passing control to the loaded program code. All operating systems that support program loading have loaders.

In many operating systems the loader is permanently resident in memory. So D is correct.

Ref: https://gateoverflow.in/1662/gate1998-1-25-isro2008-41

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