26. Filename extensions help identify certain files. What filename extension identifies executable files?

A. INF
B. PRO
C. EXE
D. SYS
E. None of the above

27. Which combination of keys allows you to perform a warm boot?

A. Ctrl+ESC
B. Ctrl+Alt+DEL
C. Ctrl+Shift+DEL
D. Ctrl+Shift+ENTER
E. None of the above

28. You suspect that your automatic modem dialer is not working correctly. Which of the following commands will manually dial the number 123- 4567?

A. AT1234567
B. ATDT1234567
C. AT1234567DL
D. ATM 1234567
E. None of the above

29. Which command is used to copy all files from drive A with extension .TXT to the currently logged drive and directory?

A. COPY a: *.TXT
B. COPY *.TXT A:
C. COPY *.TXT C:
D. COPY *.TXT ALL.TXT
E. None of the above

30. While working with MS-DOS, which command is used to switch to the monochrome display from color display?

A. MODE BLACK
B. MODE B/W
C. MODE MONO
D. MODE CO40
E. None of the above