NIMCET Computer Previous Year Questions (PYQs) – Page 21 of 23

In $n$-bit $2$'s complement representation, the range of signed integers is:

$-2^{n-1}$ to $2^{n-1}-1$

Here,

$n=8$

So, range is:

$-2^{7}$ to $2^{7}-1$

$=-128$ to $127$

Therefore, the minimum negative integer value is $-128$.

Without mechanical movement of the reading head, the system can read sectors from the same cylinder.

A cylinder consists of the same track number across all surfaces.

Given:

Number of surfaces $=4$

Sectors per track $=2000$

So, sectors readable without head movement:

$4\times 2000=8000$

Total memory required by $100$ processes is:

$100\times 100MB=10000MB$

$10000MB\approx 10GB$

Since the computer has $16GB$ RAM, total required memory is less than available RAM.

But Virtual Memory is still useful because it provides memory isolation and protection across different processes.

Each process gets its own virtual address space, which helps prevent one process from directly interfering with another process.