Computer Fundamental

note!Answer: D) Optical
DVDs store data using lasers on a reflective surface, which makes them optical discs.

note!Answer: A) Keyboard
A keyboard is a manual-entry input device because users type data by pressing keys. A scanner, barcode reader, and OMR (Optical Mark Recognition) device are classified as direct-entry input devices because they capture data directly from documents or printed markings.

note!Answer: B) 2GL
Mnemonic codes are short symbolic names for instructions, used in second generation (assembly) languages.

note!Answer: A) Laser
Laser printers produce the sharpest, highest-quality printed graphics among the options.

note!Answer: D) 127
A traditional USB bus supports a maximum of 127 device addresses (including the hub/root-hub addressing convention) on a single USB host/controller hierarchy.

note!Answer: D) All of the above
A computer system consists of hardware, software and human ware (users).

note!Answer: C) Bus
A bus is a set of parallel wires that connects hardware components inside a computer.

note!Answer: B) IC
Integrated circuits (ICs) defined the third generation of computers, starting around 1964.

note!Answer: D) IBM and IBM compatible
IBM PCs and IBM-compatible PCs share the same architecture, unlike Apple Macintosh systems.

note!Answer: A) Function keys
Function keys (F1 to F12) can be programmed to perform special tasks in software.

note!Answer: C) First generation second generation of computer
UNIVAC (Universal Automatic Computer) was one of the earliest commercial computers. The UNIVAC I was delivered in 1951 and used vacuum tubes, which are characteristic of first-generation computers.

note!Answer: C) Using UPS
A UPS (Uninterruptible Power Supply) supplies battery power during an outage, allowing safe shutdown.

note!Answer: D) All of the above
Computers are diligent, automatic and non-intelligent (they only follow instructions), so all options describe them.

note!Answer: B) MHZ
CPU clock speed is measured in megahertz (MHz) or gigahertz (GHz).

note!Answer: D) Placed between the main memory and microprocessor
Cache memory is a small, fast memory placed between the main memory and the microprocessor to speed up access.

note!Answer: C) Modem
A modem connects the computer to the internet, which is needed to send and receive email.

note!Answer: B) Optical storage
DVDs store data using lasers on a reflective disc, so they are optical storage.

note!Answer: B) Tailored software
Tailored (custom) software is written to meet the specific requirements of a particular organization.

note!Answer: B) Output device
A printer receives data from the computer and produces output on paper, so it is an output device.

note!Answer: D) All of the above
A computer system consists of storage, input/output devices, and a CPU together.