9 Lecture

1. What is the smallest unit of digital data storage? a. Kilobyte b. Megabyte c. Gigabyte d. Bit

Answer: d. Bit

2. What is the largest unit of digital data storage? a. Kilobyte b. Megabyte c. Terabyte d. Exabyte

Answer: d. Exabyte

3. Which type of storage device uses magnetic fields to store data? a. Solid-state drive (SSD) b. Hard disk drive (HDD) c. USB flash drive d. Optical disc

Answer: b. Hard disk drive (HDD)

4. What is the main disadvantage of optical discs as a storage medium? a. They are expensive b. They have limited storage capacity c. They are prone to physical damaged d. They are slow to access data

Answer: b. They have limited storage capacity

5. Which type of storage device uses flash memory to store data? a. Solid-state drive (SSD) b. Hard disk drive (HDD) c. USB flash drive d. Optical disc

Answer: a. Solid-state drive (SSD)

6. Which type of RAID configuration provides the highest level of data protection? a. RAID 0 b. RAID 1 c. RAID 5 d. RAID 10

Answer: d. RAID 10

7. What is the purpose of data compression? a. To reduce the size of a file b. To increase the speed of data transfer c. To protect data from corruption d. To increase the storage capacity of a device

Answer: a. To reduce the size of a file

8. What is the most common file system used in Windows computers? a. NTFS b. FAT32 c. HFS+ d. Ext4

Answer: a. NTFS

9. Which type of backup creates a copy of all data, regardless of whether it has changed? a. Incremental backup b. Differential backup c. Full backup d. Mirror backup

Answer: c. Full backup

10. What is the purpose of RAID? a. To improve the performance of a storage system b. To provide redundancy and data protection c. To compress data to save storage space d. To encrypt data for security purposes

Answer: b. To provide redundancy and data protection

1. What is the difference between primary and secondary storage? Answer: Primary storage, also known as memory, is volatile and is used to temporarily store data that is being actively processed by the computer. Secondary storage, on the other hand, is non-volatile and is used to store data for long-term use.

   
   

2. What is a hard disk drive (HDD)? Answer: A hard disk drive uses magnetic fields to store data on spinning disks. The disks are read and written to by a magnetic head that moves across the surface of the disk.

   
   

3. What is a solid-state drive (SSD)? Answer: An SSD uses flash memory to store data. This means that they have no moving parts, making them less prone to failure than hard disk drives.

   
   

4. What is a file system? Answer: A file system is responsible for organizing and managing the data on the storage device.

   
   

5. What are the advantages of NTFS file system? Answer: NTFS is the most common file system used in Windows computers, and it offers advanced features such as file compression and encryption.

   
   

6. What is the purpose of data backup? Answer: The purpose of data backup is to protect against data loss due to hardware failure, theft, or other unforeseen events.

   
   

7. What is a full backup? Answer: Full backup creates a complete copy of all data, regardless of whether it has changed since the last backup.

   
   

8. What is an incremental backup? Answer: Incremental backup only backs up data that has changed since the last backup.

   
   

9. What is a differential backup? Answer: Differential backup backs up all data that has changed since the last full backup.

   
   

10. What are the different types of data storage devices? Answer: The different types of data storage devices include hard disk drives, solid-state drives, USB flash drives, memory cards, and optical discs such as CDs and DVDs.

Data Storage

Data storage is a critical component of modern computing systems. As the amount of data that is generated and collected continues to increase exponentially, efficient and reliable storage solutions are more important than ever. In this article, we will discuss the various types of data storage technologies and their advantages and disadvantages. There are two main types of data storage: primary storage and secondary storage. Primary storage, also known as memory, refers to the volatile memory that is used to temporarily store data that is being actively processed by the computer. Secondary storage, on the other hand, refers to non-volatile storage devices that are used to store data for long-term use. One of the most common types of secondary storage is the hard disk drive (HDD). Hard disk drives use magnetic fields to store data on spinning disks. The disks are read and written to by a magnetic head that moves across the surface of the disk. Hard disk drives have been a popular choice for secondary storage for many years because of their high storage capacity and relatively low cost per gigabyte. However, they are vulnerable to physical damage, and their moving parts make them more prone to failure. Another popular type of secondary storage is the solid-state drive (SSD). Unlike hard disk drives, SSDs use flash memory to store data. This means that they have no moving parts, making them less prone to failure than hard disk drives. SSDs are also much faster than hard disk drives, which can improve the performance of a computer system. However, they are generally more expensive than hard disk drives and have lower storage capacities. In addition to hard disk drives and solid state drives, there are a number of other types of storage devices available. These include USB flash drives, memory cards, and optical discs such as CDs and DVDs. USB flash drives and memory cards are small and portable, making them ideal for transferring data between devices. However, they have limited storage capacities compared to hard disk drives and SSDs. Optical discs have largely been replaced by other storage technologies due to their limited storage capacity and slow data transfer speeds. In addition to choosing the right type of storage device, it is also important to consider the file system used to manage the data on the device. The file system is responsible for organizing and managing the data on the storage device. Different file systems have different advantages and disadvantages. For example, NTFS is the most common file system used in Windows computers, and it offers advanced features such as file compression and encryption. FAT32 is an older file system that is still commonly used because of its wide compatibility with different devices and operating systems. Data backup is another important aspect of data storage. Backing up data is essential for protecting against data loss due to hardware failure, theft, or other unforeseen events. There are several different types of data backup, including full backup, incremental backup, and differential backup. Full backup creates a complete copy of all data, regardless of whether it has changed since the last backup. Incremental backup only backs up data that has changed since the last backup, while differential backup backs up all data that has changed since the last full backup. In conclusion, data storage is a critical component of modern computing systems. Choosing the right type of storage device and file system can help ensure that data is stored efficiently and securely. Backing up data is essential for protecting against data loss, and there are several different types of backup that can be used depending on the needs of the user. By understanding the advantages and disadvantages of different data storage technologies, users can make informed decisions about how to store and protect their data.