Operating System

1.CHKDSK is the previous version of

1. XCOPY
2. DISKCOPY
3. SCANDISK
4. FORMAT

2. Which command is used to remove the read permission of the file 'note' from both the group and others?

1. chmod go+r note
2. chmod go+rw note
3. chmod go-x note
4. chmod go-r note

3.You can change a file`s read/write permission in DOS
attrib
xcopy
chmod
Diskcopy



4. Which of the following is an external DOS Command ?

1. copy
2. type
3. dir
4. Format

5.Developer of Unix OS

1. Ken Thompson, Dennis Ritchie
2. Ken Thompson, James Gosling
3. Linus Torvald, Dennis Ritchie
4. Jack Kilby , Robert Noyce

6. Diskcopy is

1. External DOS Command
2. Internal DOS Command
3. Linux Command
4. Unix Command