Technology Questions

The hypervisor is a virtual machine monitor (VMM) that manages resources for virtual machines. The name hypervisor is suggested as it is a supervisory tool for the virtual machines. There are mainly two types of hypervisors :

- Type-1: the guest Vm runs directly over the host hardware, e.g Xen, Hyper-V, VmWare ESXi

- Type-2: the guest Vm runs over hardware through a host OS, e.g Kvm, Oracle virtualbox

When writing Node.js applications, ending up with hundreds or even thousands of dependencies can easily happen.
For example, if you depend on Express, you depend on 27 other modules directly, and of course on those dependencies' as well, so manually checking all of them is not an option!

The only option is to automate the update / security audit of your dependencies. For that there are free and paid options:

1. npm outdated
2. Trace by RisingStack
3. NSP
4. GreenKeeper
5. Snyk

Properties of Sub-Query

- A sub-query must be enclosed in the parenthesis.

- A sub-query must be put in the right hand of the comparison operator, and

- A sub-query cannot contain an ORDER-BY clause.

- A query can contain more than one sub-query.

Types of Sub-Query

- Single-row sub-query, where the sub-query returns only one row.

- Multiple-row sub-query, where the sub-query returns multiple rows,. and

- Multiple column sub-query, where the sub-query returns multiple columns

Automatic Private IP Addressing

for small network if u see something default automatic numeric values entered in a device that is attached you can see someone novice has done that using APIPA

Use IDCAMS REPRO to load the flat file into the VSAM file.

- AIDL is the abbreviation for Android Interface Definition Language. 

- It handles the interface requirements between a client and a service to communicate at the same level through interprocess communication. 

- The process involves breaking down objects into primitives that are Android understandable.

AIDL supports following data types:

- String

- List

- Map

- CharSequence

- All native Java data types like int,long, char and Boolean

- The easiest difference is static HTML once rendered cannot be changed on the other hand dynamic HTML can be changed.

- Static web pages cannot have database access but dynamic pages can be connected to database.

- Using static HTML no interactions persist between user and server but dynamic HTML has capability to interact with the user.

- Static HTML does not require server side coding but dynamic HTML requires server side coding.

- No animation, games can be developed using the static HTML but on the other hand dynamic HTML can perform this task.

The use of XML-based layouts provides a consistent and somewhat standard means of setting GUI definition format. In common practice, layout details are placed in XML files while other items are placed in source files.