CBSE Class 7 Computer Science DOS Commands Worksheet

Fill in the blanks

Question: ___________ file determines which hardware to contact for any particular command.
a. IO.SYS
b. MS.SYS
c. MSDOS.SYS
d. COMMAND.COM
Answer: IO.SYS

Question: Any instruction given to the computer to perform specific task is called __________.
a. LINE
b. COMMAND
c. SENTENCE
d. INSTRUCTION
Answer: COMMAND

Question: ___________ directory is the main directory.
a. SUB
b. CURRENT
c. FILE
d. ROOT
Answer:  ROOT

Question: The internal commands reside in ___________ file.
a. IO.SYS
b. MS.SYS
c. MSDOS.SYS
d. COMMAND.CO
Answer: COMMAND.COM

Question: A ________is used for combining several commands into one command.
a. BATCH FILE
b. EDIT
c. COPY CON
d. ATTRIB
Answer: BATCH FILE

TRUE/FALSE

Question: Improperly editing the file can cause issues with your computer.
Answer: True

Question: ATTRIBE command is used for protecting the files from accidental changes or modification.
Answer: True

Question: Notepad is a command line text editor that allows you to view, create, or modify any file on your computer.
Answer: False

Question: Batch files are stored with an extension .bat
Answer: True

Question: Prompt is an external command.
Answer: False

Short Answer Type Questions

Question: Define the term Root Directory
Answer: Root directory is the main directory. All other directories are present in this directory, which are termed as Sub-Directories. After immediately booting the system, the root directory becomes the main directory.

Question: Give examples of four internal commands.
Answer: All the internal commands are present in the COMMAND.COM file. Some of the common examples of internal commands are given below:
1. DATE
2. TIME
3. CLS
4. COPY
5. MOVE
6. RD
7. CD
8. MD

Question: Give examples of four external commands.
Answer: Each external command has a separate file of their own. They are not a part of COMMAND.COM file.
Some of the common examples of external commands are given below:
1. XCOPY 2. ATTRIBE 3. EDIT 4. TREE 5. MORE 6. SORT

Question: What is a Batch File?
Answer: A batch file is used for combining several commands into one command. This is used to perform a specific task at the command prompt. Extension of batch file is .BAT.

Question: What is MS-DOS Editor?
Answer: It is a command line text editor of DOS. We can view files by opening them in it. We can also create new files using this editor and can also edit the consents of already existing files.

FULL FORMS

1. CPU : CENTRAL PROCESSING UNIT
2. RAM : RANDOM ACCESS MEMORY
3. ROM : READ ONLY MEMORY
4. CD : COMPACT DISK
5. DVD : DIGITAL VIDEO DISK
6. USB : UNIVERSAL SERIAL BUS
7. BMP : BITMAP PICTURE
8. JPEG : JOINT PICTURE EXPERT GROUP
9. RTF : RICH TEXT FORMAT
10.. GIF : GRAPHICS INTERCHANGE FORMAT
11.PNG : PORTABLE NETWORK GRAPHICS
12. DOS : DISK OPERATING SYSTEM
13. CUI : CHARACTER USER INTERFACE
14. GUI : GRAPHICAL USER INTERFACE
15. IBM : INTERNATIONAL BUSINESS MACHINE
16. CLS : CLEAR SCREEN
17. VER : VERSION
18. MD : MAKE DIRECTORY
19. RD : REMOVE DIRECTORY
20. CD : CHANGE DIRECTORY
21. REN : RENAME
22. DIR : DIRECTORY
23. WWW : WORLD WIDE WEB
24. PC : PERSONAL COMPUTER
25. KB : KILOBYTE
26. MB : MEGABYTE
27. GB : GIGABYTE
28. TB : TERABYTE

SHORTCUT KEYS (FOR MS WORD)

1. Ctrl+A : Select All
2. Ctrl+B : Bold
3. Ctrl+C : Copy
4. Ctrl+D : Font Dialog Box
5. Ctrl+E : Center Align
6. Ctrl+F : Find
7. Ctrl+G : Goto line/page no etc.
8. Ctrl+H : Replace
9. Ctrl+I : Italic
10. Ctrl+J : Justify
11. Ctrl+K : Hyperlink
12. Ctrl+L : Left Align
13. Ctrl+N : New File
14. Ctrl+O : Open File
15. Ctrl+P : Print
16. Ctrl+R : Right Align
17. Ctrl+S : Save File
18. Ctrl+U : Underline
19. Ctrl+V : Paste
20. Ctrl+X : Cut
21. Ctrl+Y : Redo
22. Ctrl+Z : Undo
23. Ctrl+1 : Single Line Spacing
24. Ctrl+2 : Double Line Spacing
25. Ctrl+5 : 1.5 Line Spacing
26. Ctrl+] : Increase Font Size
27. Ctrl+[ : Decrease Font Size
28. F3 : Change Case
29. F7 : Spelling and Grammar Check
30. Alt+F4 : Close Program