题目内容

( ) is a program that is often used to help find problems in other programs.

A debugger
B. A loader
C. A linker
D. An assembler

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High-level languages must first be translated into a machine language before they can be understood and processed by a computer. This job is often done by ( ).

A. an assembler
B. a loader
C. a linker
D. a compiler

( ) is the basic software that controls a computer.

An operating system
B. A word-processing program
C. An application program
D. An assembler

The most widely used OS in the world is ( ) which provides users with a graphical user interface.

A. Windows OS
B. UNIX
C. MS-DOS
D. OS/2

A (An) ( ) is a low-level language in binary code that the computer can understand and execute directly.

A. assembly language
B. object-oriented language
C. machine language
D. high-level language