What was the speed of the first commercial CPU?

What was the speed of the first commercial CPU?

• 1 GHz
• 100 kHz
• 2 MHz
• 5 Hz 

EXPLANATION

The initial clock speed of 4004 is 108 kHz, while the maximum clock speed is 740 kHz. Memory bus architecture is of the Harvard type (The Harvard architecture is a computer architecture with physically separate computer storage and signal pathways for instructions and data. The term originated from the Harvard Mark I relay-based computer, which stored instructions on punched tape and data in electromechanical counters). The 4004 used 4-bit bus for transferring, 12-bit addresses, 8-bit instructions and 4-bit data word.

Computer processor history

Year	Event
2002	Intel released the Celeron 1.3 GHz with a 100 MHz bus and 256 kB of level 2 cache.
2003	Intel Pentium M was introduced in March 2003.
2003	AMD released the first single-core Opteron processors, with speeds of 1.4 GHz to 2.4 GHz and 1024 KB L2 cache, on April 22, 2003.

 

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Who invented the Internet?

Who invented the Internet?

• Leonard Kleinrock
• Al Gore
• Robert Taylor
• Lawrence Roberts 

 

EXPLANATION

The history of the Internet begins with the development of electronic computers in the 1950s. Initial concepts of wide area networking originated in several computer science laboratories in the United States, United Kingdom, and France.^[1] The U.S. Department of Defense awarded contracts as early as the 1960s, including for the development of the ARPANET project,
directed by Robert Taylor and managed by Lawrence Roberts. The first message was sent over the ARPANET in 1969 from computer science Professor Leonard Kleinrock's laboratory at University of California, Los Angeles (UCLA) to the second network node at Stanford Research Institute (SRI). 

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In PowerShell, all variable names begin with which character?

In PowerShell, all variable names begin with which character?

• *
• %
• #
• $ 

EXPLANATION

In PowerShell, variable names start with the $ character. You can assign a value to a variable using the assignment operator, which is the = character. You can create a variable by simply assigning it a value. For example, the command

$myName = "Ferb"

creates a variable named $myName and assigns it a string value. The double quotes (" ") indicate that a string value is being assigned to the variable.
As I mentioned previously, PowerShell variables are really objects. In simple terms, objects can contain data (properties) and operations you can perform on the data (methods). In this example, the $myName variable is really a String object. As with other objects, the String object has both properties and methods. For example, the Length property of a String object tells you the number of characters in the string, and the ToUpper method gives you a copy of the string converted to uppercase. You can access both properties and methods using a dot (.) after the variable name. Properties don't use parentheses ( ), but methods do. For example, the command

$myName.Length

returns a value of 4 because the variable's value (Ferb) is four characters long. The command

$myName.ToUpper()

returns FERB.

 

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Which of the following devices can operate in the Network and Data Link layers?

Which of the following devices can operate in the Network and Data Link layers?

• Bridge
• Router
• NIC
• Brouter (Bridge Router) 

EXPLANATION

Brouter combines the function of a router as well as a bridge. Router operates in the network layer and bridge operates in the data link layer.

http://techterms.com/definition/brouter

SOURCE

http://techterms.com/definition/brouter

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On most systems, what is one of the first programs loaded on start-up (after the bootloader)?

On most systems, what is one of the first programs loaded on start-up (after the bootloader)?

• Kernel
• BIOS
• Master Boot Record
• Windows 

EXPLANATION

The kernel is a computer program that is the core of a computer's operating system, with complete control over everything in the system.[1] On most systems, it is one of the first programs loaded on start-up (after the bootloader).
It handles the rest of start-up as well as input/output requests from software, translating them into data-processing instructions for the central processing unit. It handles memory and peripherals like keyboards, monitors, printers, and speakers.

SOURCE

https://en.wikipedia.org/wiki/Kernel_(operating_system)

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