How many usable IP addresses are in a single Class C block?
- 24
- 508
- 36000
- 254
How many usable IP addresses are in a single Class C block?
Tuesday, March 20, 2018
Which of the Following is NOT a Sync Type when Syncing Files and Folders using SyncToy, FreeFileSync and other File Syncing Tools?
Which of the Following is NOT a Sync Type when Syncing Files and Folders using SyncToy, FreeFileSync and other File Syncing Tools?
- Dedupe
- Contribute (Update)
- Sync (Two-Way Sync)
- Mirror
EXPLANATION
Dedupe is a Storage Technology which operates on a block level to save storage space using pointers to data blocks. It is not a file level operation.Contribute / Update -> Updates Files from the Left Folder Path to the Right without deleting any files or folders. Renamed, Modified and New Files and Folders are added from Left to Right.
Sync (Two-Way Sync) - New items, Renames, Modifications and Deletions are synced from Left to Right and Right to Left Paths (both directions).
Mirror - Copies and Overwrites all file and folder items from the Left Path to The Right Path - creates a mirror copy from Left to Right File Paths. Useful for Backups to removable storage such as USB External Hard Drives.
SOURCE
https://en.wikipedia.org/wiki/File_synchronizationWhich of the following is NOT an RFID frequency band?
Which of the following is NOT an RFID frequency band?
- 865-868 MHz
- 902-928 MHz
- 470-512 MHz
- 13.56 MHz
EXPLANATION
470–512 MHz is in use in the US for low-band TV channels 14–20 (also shared for land mobile 2-way radio use in some areas). https://en.wikipedia.org/wiki/Ultra_high_frequency#United_States
All other frequencies mentioned are used for RFID communication: https://en.wikipedia.org/wiki/Radio-frequency_identification
What do you call a series of SCSI devices working together through a host adapter?
What do you call a series of SCSI devices working together through a host adapter?
- An SCSI controller
- An SCSI chain
- Cabled SCSI
- RAID
EXPLANATION
A series of SCSI devices working together through a host adapter is called an SCSI chain. The host adapter provides the interface between the SCSI chain and the PC.If you want to cluster MySQL databases, what software do you use?
If you want to cluster MySQL databases, what software do you use?
- MySQL Cluster
- Apache Hadoop
- Kubernetes
- Beowulf
EXPLANATION
MySQL Cluster provides shared-nothing clustering and auto-sharding for the MySQL database management system. It is designed to provide high availability and high throughput with low latency, while allowing for near linear scalability.Which of these is NOT a real Linux package manager?
Which of these is NOT a real Linux package manager?
- PETget
- Tuxbrew
- Conary
- Pacman
EXPLANATION
Linux package managers are a dime a dozen and have lots of crazy names, like Pacman, PETget, and Conary.
For files in Unix and Linux, "atime" means most recent access time. What does "ctime" mean?
For files in Unix and Linux, "atime" means most recent access time. What does "ctime" mean?
- the time that file was most recently copied
- the file's data change time
- the file's status change time
- the file's creation time
EXPLANATION
atime is access time, or when the file was last read.mtime is modification time, or when the file's data was last modified.
ctime is change time, or when the files status (metadata) was last changed. Metadata, data about the file as opposed to data in the file, is held in the file's inode.
Unix jargon for "the time a file's status last changed". Change time and creation time (ctime)Unix and Windows file systems interpret 'ctime' differently:Unix systems maintain the historical interpretation of ctime as being the time when certain file metadata, not its contents, were last changed, such as the file's permissions or owner (e.g. 'This file's metadata was changed on 05/05/02 12:15pm'). Windows systems use ctime to mean 'creation time'[citation needed] (also called 'birth time') (e.g. 'This file was created on 05/05/02 12:15pm').
