Which of the following is a DOS device driver that allows DOS programs to store data in extended memory via XMS?

Which of the following is a DOS device driver that allows DOS programs to store data in extended memory via XMS?

• EMM386
• UMA
• HIMEM.SYS
• KMDF 

EXPLANATION

SYS is a DOS device driver which allows DOS programs to store data in extended memory via the Extended Memory Specification (XMS). This device driver is of particular importance because various versions of Microsoft Windows that ran on top of the DOS operating system required HIMEM. SYS to be loaded to be able to run.

HIMEM. SYS is a DOS device driver which allows DOS programs to store data in extended memory via the Extended Memory Specification (XMS). This device driver is of particular importance because various versions of Microsoft Windows that ran on top of the DOS operating system required HIMEM.