| Q.21 | ‘>’ symbol in DOS commands is used to ? |
| A | Compare two values |
| B | Redirect input |
| C | Redirect output |
| D | Filter data |
| Q.22 | Usually, in MS-DOS the primary hard disk drives has the drive letter…..? |
| A | A |
| B | B |
| C | C |
| D | D |
| Q.23 | Which of the following is not usual file extension in DOS ? |
| A | .exe |
| B | .bat |
| C | .0 |
| D | .com |
| Q.24 | Which one of commands in MS-DOS commands sends contents of the screen to an output device ? |
| A | BREAK |
| B | DISK COPY |
| C | MORE |
| D | None of these |
| Q.25 | Which commands is used to delete file from a directory in DOS ? |
| A | REN |
| B | DEL |
| C | CD |
| D | MD |
| Q.26 | In DOS the DIR COMMAND IS USED TO ? |
| A | Display content of a file |
| B | Delete file |
| C | Display list of files and sub-directories |
| D | Copy files |
| Q.27 | The DOS command which cannot be executed with versions 1 and 2 is ? |
| A | GRAPHICS |
| B | FIND |
| C | LABEL |
| D | MODE |
| Q.28 | Which one of the following is an MS-DOS external command ? |
| A | DIR |
| B | COPY |
| C | FORMAT |
| D | PROMPT |
| Q.29 | In DOS the label command is used to ? |
| A | Create the label of disk |
| B | Change the label of disk |
| C | remove the label of disk |
| D | Both a and b |
| Q.30 | Which of the following is not an operating system ? |
| A | Windows |
| B | DOS |
| C | Linux |
| D | CP/M |
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