Question 1

Which of the following is a volatile memory that loses all data when the computer is switched off?

Accepted Answer

RAM (Random Access Memory) is volatile and requires continuous power to retain data, unlike non-volatile storage devices like HDD or SSD.

Question 2

What is the storage capacity of a standard DVD?

Accepted Answer

A single-layer DVD has a standard storage capacity of 4.7 GB, while a CD holds 650 MB and Blu-ray holds up to 100 GB.

Question 3

Which memory device is used to permanently store the computer's boot instructions and BIOS?

Accepted Answer

ROM (Read-Only Memory) is non-volatile and stores permanent instructions like BIOS that cannot be easily modified or lost during shutdown.

Question 4

How much faster is SSD compared to HDD in terms of data access speed?

Accepted Answer

SSDs (Solid State Drives) are typically 15-20 times faster than HDDs (Hard Disk Drives) because they use flash memory without moving mechanical parts.

Question 5

What is the primary function of cache memory in a computer?

Accepted Answer

Cache memory acts as a high-speed buffer between the CPU and RAM, storing frequently accessed data to reduce access time.

Question 6

Which of the following storage devices is non-volatile and commonly used for external data backup?

Accepted Answer

External HDDs are non-volatile, portable storage devices ideal for backing up data because they retain information even after power is disconnected.

Question 7

What is the primary difference between RAM and ROM in a computer system?

Accepted Answer

RAM (Random Access Memory) is volatile and requires continuous power, whereas ROM (Read-Only Memory) is non-volatile and permanently stores data like BIOS.

Question 8

Which storage device has the fastest data access time among the following?

Accepted Answer

SSDs have no moving parts and provide faster data access compared to mechanical HDDs, optical disks, and magnetic tapes.

Question 9

What is the typical storage capacity of a standard modern USB flash drive commonly used in offices?

Accepted Answer

Modern USB flash drives commonly range from 2 GB to 32 GB for general office and personal use.

Question 10

In a computer system, cache memory is primarily used to:

Accepted Answer

Cache memory bridges the speed gap between the CPU and main RAM by temporarily storing frequently accessed data.

Question 11

Which of the following storage devices is considered non-volatile and is commonly used for external backup purposes?

Accepted Answer

External hard disks and SSDs are non-volatile, portable storage devices ideal for backup and data transfer between computers.

Question 12

What does the acronym GB stand for in the context of computer storage capacity?

Accepted Answer

GB (Gigabyte) is a unit of digital storage equal to 1024 MB or approximately 1 billion bytes.

Question 13

Which memory type is used in modern smartphones and tablets for storing applications and user data?

Accepted Answer

Smartphones and tablets primarily use flash memory technology (like eMMC or UFS) for fast, non-volatile storage of apps and data.

Question 14

A computer has 8 GB of RAM and a 256 GB SSD. If an application requires 2 GB of RAM and 50 GB of storage space, how much usable RAM and storage will remain after installation?

Accepted Answer

RAM is volatile memory used during execution (8 GB - 2 GB = 6 GB remaining), while SSD is persistent storage (256 GB - 50 GB = 206 GB remaining).

Question 15

Which of the following correctly represents the hierarchy of computer memory from fastest to slowest in terms of access speed?

Accepted Answer

Cache (fastest, smallest) → RAM (fast, volatile) → SSD (moderate, non-volatile) → HDD (slowest, large capacity) represents the correct speed hierarchy of storage devices.

Agniveer Army Clerk SKT Memory & Storage Devices

Memory & Storage Devices — Practice Questions