SSC IMD SA 2017 – Question 148

Which of the following statements is NOT true?

• Caching is a fast memory.
• Caching transparently stores data in a component called cache, so that future requests for that data can be served faster.
• Caching holds output for a device.
• The data stored within a cache might be values that have been computed earlier or duplicates of original values that are stored elsewhere.

Detailed Explanation:

The correct answer is c) Caching holds output for the device (कैशिंग डिवाइस के लिए निर्गत रखता है।).

To determine the false statement, let us evaluate the technical definitions of Caching, Buffering, and Spooling:

• Caching: A fast memory component (SRAM or fast DRAM) that transparently stores copies of frequently or recently accessed data from slower storage so that future requests for that data can be serviced much faster. Statements (a), (b), and (d) are all correct definitions and properties of caching.
• Why Statement (c) is FALSE: Holding output or data for a device to process at its own pace is the definition of Spooling (e.g., print spooling holding print jobs) or Buffering (holding data in transit to handle speed mismatches between producer and consumer), NOT caching.