The data blocks of a very large file in the Unix file system are allocated using

For a magnetic disk with concentric circular tracks, the seek latency is not linearly proportional to the seek distance due to

Which of the following is/are true of the auto-increment addressing mode?
$${\rm I}.\,\,\,$$ It is useful in creating self-relocating code
$${\rm II}.\,\,\,$$ If it is included in an Instruction Set Architecture, then an additional $$ALU$$ is required for effective address calculation.
$${\rm III}.\,\,\,$$ The amount of increment depends on the size of the data item accessed

A process executes the following code

for (i = 0; i < n; i + +) fork ( ); 

The total number of child processes created is