CRUD is create, read, update and delete. How can we interpret in sql commands?

CRUD is create, read, update and delete. How can we interpret in sql commands?

• Create, Read, Upgrade and Delete;
• Create, Read, Update and Delete;
• Insert, Select, Upgrade and Delet;
• Insert, Select, Update and Delete; 

 

EXPLANATION

This procedure performed using SQL is known as CRUD - Create, Read, Update and Delete which is nothing more than the composition of the basic operations that an application performs in a database, creating, reading, updating and deleting data. See the abbreviation CRUD mapped below:

Create -> INSERT;

Read -> SELECT;

Update -> UPDATE;

Delete -> DELETE.

SOURCE

https://www.sqlshack.com/creating-using-crud-stored-procedures/

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What is the term for a rogue access point that serves as a man in the middle from which further attacks can be carried out?

What is the term for a rogue access point that serves as a man in the middle from which further attacks can be carried out?

• War driving
• Twin driving
• War twinning
• Evil twin 

EXPLANATION

An evil twin is a rogue access point used for malicious purposes. The attacker acts as a man in the middle.

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In the early days of computer technology, what type of memory had to be hand made rather than by machine?

In the early days of computer technology, what type of memory had to be hand made rather than by machine?

• Thin film memory
• EPROM
• Magnetic core memory
• Bubble Memory 

 

EXPLANATION

Magnetic core memory was almost always "woven" by hand in spite of repeated attempts to automate the process. Core uses tiny magnetic beads (the cores), through which wires are threaded to write and read information.

SOURCE

https://en.wikipedia.org/wiki/Magnetic-core_memory

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Which is the standard file extension used by VMWare for virtual hard drive images?

Which is the standard file extension used by VMWare for virtual hard drive images?

• VHD (Virtual Hard Disk)
• VDI (Virtual Disk Image)
• VMDK (Virtual Machine Disk)
• HDD (Hard Disk Drive) 

 

EXPLANATION

VMDK is the standard used by VMWare and is supported by several other virtual hypervisors.  It can contain the entire virtual machine, including settings.
VHD is the standard typically used by Microsoft Hyper-V.  It represents a single virtual drive, and does not contain configuration settings for the rest of the virtual machine.
HDD is the standard for Parallels.
VDI is the standard and default for type-2 hypervisor VirtualBox; it can use and create all four of the listed formats, however.

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What is the minimum size of the IPv6 packet header?

What is the minimum size of the IPv6 packet header?

• 36 octets
• 32 octets
• 40 octets
• 48 octets 

 

EXPLANATION

The IPv6 packet header has a minimum size of 40 octets. Options are implemented as extensions. This provides the opportunity to extend the protocol in the future without affecting the core packet structure.
RFC 2460; Internet Protocol, Version 6 (IPv6) Specification, S. Deering, R. Hinden (December 1998)
https://en.wikipedia.org/wiki/IPv6

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