You have a table phone_book with 2 billion rows in it. Adding an index on last_name will require a lot of space. If the average last_name is 8 bytes long, you are looking at roughly 16 GB of space for the data portion of the index. Which of the following will help in reducing the size of index space?

What is the function of the 'swapon' command while installing Linux in the command line interface mode?

Abstract class BaseCls{ protected abstract function getName(); } class ChildCls extends BaseCls{ } Which implementation of getName() is invalid in ChildCls?

One of your PHP pages is very heavy and loading it takes about two minutes. But before it loads, a browser timeout occurs. Which will help solve this problem?

Which program automatically determines the number of blocks in a device and sets some reasonable defaults?

Mike Johnson is running Apache on an extremely busy server where hundreds of requests per second is a requirement. He might have to change the default hard limits set in the MPM module. Which hard limits should he change?

What domain name will have the following address - 127.0.0.1?

What's LAMP (in the most cases)?

What is HTTP?

The name of a web-based interface for work with databases is called…

What is the name of a superuser in Linux?