NIMCET 2007 — Computer PYQ

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Question

NIMCET 2007 — Computer PYQ

NIMCET | Computer | 2007

Which of the following is volatile memory :

Choose the correct answer:

Explanation

Let's look at the mathematical and logical definitions of these systems to determine the correct choice:

1. Volatile Memory

Volatile memory is a temporary working space that requires constant electrical power to maintain its stored state.

Let $P$ represent the power status of the computer system, where $P \in {0, 1}$ ( $0$ for Off, $1$ for On).
Let $D (t)$ represent the state of the data stored in memory at time $t$ .

For volatile memory, the relationship between data retention and electrical power can be expressed as:

$If P = 0 ⟹ D (t) = \emptyset$

RAM (Random Access Memory): It is the primary example of volatile memory. The CPU uses RAM to store active program instructions and real-time data. The moment the computer is shut down or loses electricity ( $P = 0$ ), every single bit of information stored in RAM is immediately wiped out.

2. Non-Volatile Memory

Non-volatile memory contains semi-permanent or permanent data that does not rely on a continuous electrical current to remain intact.

$If P = 0 ⟹ D (t) \neq = \emptyset$

ROM (Read-Only Memory): ROM is non-volatile. It holds crucial system boot instructions (such as the BIOS or firmware). It securely retains its data sequence even when the device is completely powered down.

Analyzing the Options:

(a) ROM, RAM: Incorrect, because ROM is non-volatile.
(b) RAM: Correct, because RAM is entirely volatile.
(c) ROM: Incorrect, because ROM is non-volatile.
(d) none: Incorrect.

Conclusion

Among the given options, RAM is the only type of memory that satisfies the definition of a volatile storage medium.

Correct Answer: (b) RAM