Data storage on physical media MCQs in DBMS

By: Prof. Dr. Fazal Rehman Shamil | Last updated: September 23, 2024

MCQs on Data Storage on Physical Media in DBMS

1.Which of the following storage media is known for having the fastest data access time?

A. Magnetic Tape
B. Hard Disk Drive (HDD)
C. Solid State Drive (SSD)
D. Optical Disc
Answer: C. Solid State Drive (SSD)

2.In the context of DBMS, what is a ‘block’?

A. A collection of records
B. The smallest unit of data that can be read or written
C. A data type
D. A storage location in RAM
Answer: B. The smallest unit of data that can be read or written

3.Which of the following is primarily used for archival storage due to its sequential access nature?

A. SSD
B. HDD
C. Magnetic Tape
D. Flash Drive
Answer: C. Magnetic Tape

4.In a DBMS, the term ‘seek time’ refers to:

A. The time taken to move the disk arm to the desired track
B. The time taken to transfer data from the disk to memory
C. The time taken to process a query
D. The time taken to retrieve a block of data from cache
Answer: A. The time taken to move the disk arm to the desired track

5.What is the purpose of using RAID (Redundant Array of Independent Disks) in data storage?

A. To increase data access time
B. To provide fault tolerance and improve performance
C. To decrease storage capacity
D. To encrypt data
Answer: B. To provide fault tolerance and improve performance

6.Which of the following RAID levels offers mirroring but no striping?

A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 10
Answer: B. RAID 1

7.In a magnetic disk, data is organized into concentric circles called:

A. Sectors
B. Tracks
C. Blocks
D. Cylinders
Answer: B. Tracks

8.What is the main advantage of using an SSD over an HDD?

A. Higher storage capacity
B. Lower cost per GB
C. Faster data access speed
D. Larger physical size
Answer: C. Faster data access speed

9.Which of the following is a type of non-volatile memory used in storage devices?

A. RAM
B. Cache Memory
C. Flash Memory
D. Registers
Answer: C. Flash Memory

10.Which component of a hard disk drive (HDD) is responsible for reading and writing data?

A. Platter
B. Spindle
C. Read/Write Head
D. Actuator Arm
Answer: C. Read/Write Head

11.In a disk drive, what is ‘rotational latency’?

A. The time taken to spin up the disk
B. The time taken to move the read/write head to the correct track
C. The delay waiting for the disk to rotate to the correct position
D. The time taken to transfer data from the disk to the memory
Answer: C. The delay waiting for the disk to rotate to the correct position

12.Which type of storage device typically has the highest capacity?

A. SSD
B. HDD
C. Optical Disc
D. Flash Drive
Answer: B. HDD

13.What is the function of a ‘sector’ in the context of disk storage?

A. To store a single record
B. To divide the disk into logical units
C. To store a fixed amount of data within a track
D. To organize data hierarchically
Answer: C. To store a fixed amount of data within a track

14.Which of the following is an advantage of using magnetic tapes for data storage?

A. Fast random access
B. High durability and long-term storage
C. Low cost per MB
D. Small physical size
Answer: B. High durability and long-term storage

15.What does the ‘write-through’ method in caching ensure?

A. Data is written to cache only
B. Data is written to main memory only
C. Data is written simultaneously to cache and main memory
D. Data is never written to cache
Answer: C. Data is written simultaneously to cache and main memory

 

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