Computer question from Jr. Assistant exam, 2026 by JKSSB
Which statement is correct concerning computer memory and data storage fundamentals?
Last updated Jun 24, 2026
Correct Answer:
Option C —
Cache memory is faster than the Main memory and stores frequently accessed data.
To understand why Cache is so vital, we must look at the Memory Hierarchy. The goal of this hierarchy is to balance speed, cost, and capacity.
Speed vs. Capacity: As you move up the pyramid (toward the CPU), memory becomes significantly faster and more expensive, but the storage capacity decreases.
The Role of Cache: Because modern CPUs are much faster than RAM, the CPU would spend most of its time "idling" if it had to wait for RAM to send data. Cache memory stores copies of the data from the most frequently used main memory locations so the CPU can access them almost instantly.
Volatility: * Volatile Memory: Requires power to maintain stored information (e.g., RAM, Cache).
Non-Volatile Memory: Retains information even after power is removed (e.g., ROM, Hard Drives, Flash drives).
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
