Computer | MCQs

Explanation

The set of all possible values of data items is called domain.

A relational table's column structure is defined by a domain.

In a domain, there exist values.

They belong to a database domain, which is a column.

Explanation

Execution time is the time a computer takes to complete a job or instruction.

It measures the duration from the start to the end of processing a task.

It is crucial for evaluating processing speed and efficiency.

Explanation

Hertz (Hz) is the unit used to measure processor speed.

It indicating how many cycles per second the processor can execute.

Modern processors are measured in:

• Megahertz (MHz) - millions of cycles per second
• Gigahertz (GHz) - billions of cycles per second

Explanation

RAM is volatile and primary memory.

ROM is non-volatile and permanent storage.

Explanation

From Third generation operating systems were developed.

The period of third generation was from 1965-1971.

The computers of third generation used Integrated Circuits (ICs) in place of transistors.

A single IC has many transistors, resistors, and capacitors along with the associated circuitry.

The IC was invented by Jack Kilby.

Explanation

A computer mouse is a handheld hardware input device

A computer mouse controls a cursor in a GUI (graphical user interface) for:

• pointing,
• moving and
• selecting text,
• icons, files,
• and folders on your computer******

  ND30-12-2022

Explanation

• The main window in a computer spreadsheet is called a workbook
• while 
• The title bar in MS Excel displays the name of the  worksheet
• **
• In Excel, when we create a new document, we always select a blank workbook, as you already have done in the previous chapter.
• When this blank workbook opens up, an interface you see is called a workbook window.
  

Explanation

The International Business Machines Corporation, nicknamed Big Blue,

is an American multinational technology corporation

operations in over 175 countries.

Headquarters: Armonk, New York, United States

Founders: Herman Hollerith, Charles Ranlett Flint, Thomas J. Watson

Founded: June 16, 1911, Endicott, New York, United States

Explanation

The CPU and memory are located on the motherboard.

The motherboard's job is to connect all hardware components together.

The motherboard's a thin plate that holds the:

1. CPU,
2. Memory,
3. Connectors for the hard drive,
4. Optical drives.

Explanation

An integrated circuit is a small chip of semiconductor material, typically silicon, that contains numerous tiny MOSFETs.

The five generations of computers:

1. First Generation (1946-1959 or 1940-1956): Vacuum tube-based technology (e.g., ENIAC).
2. Second Generation (1959-1965 or 1956-1963): Transistor-based technology.
3. Third Generation (1965-1971 or 1964-1971): Integrated circuit-based technology.
4. Fourth Generation (1972-1980): VLSI microprocessor-based technology.
5. Fifth Generation (1980-present): ULSI microprocessor-based technology, with a focus on artificial intelligence.