Language Processors
Job Control Language (JCL) statements are Used to

All of these
Specify, to the operating system, the beginning and end of a job in a batch
Allocate the CPU to a job
Read the input from the slow-speed card reader to the high-speed magnetic disk

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Language Processors
Assembler is

a program that automate the translation of assembly language into machine language
a program that accepts a program written in a high level language and produces an object program
is a program that appears to execute a source program as if it were machine language
a program that places programs into memory and prepares them for execution

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