Computer science information and technolgy

19/08/2023

Q.Which of the following is the smallest unit of data in a computer?
a) Bit
b) KB
c) Nibble
d) Byte

19/08/2023

Q.. Which of the following is the brain of the computer?
a) Central Processing Unit
b) Memory
c) Arithmetic and Logic unit
d) Control unit

10/08/2023

Q. Who is the father of Computers?
a) James Gosling
b) Charles Babbage
c) Dennis Ritchie
d) Bjarne Stroustrup

21/09/2021

Q.A computer cannot "boot" if it does not have the _____

A) Compiler
B) Loader
C) Operating system
D) Assembler

21/09/2021

Q.Which of the following was used in programming the first computers?
[A] Object code
[B] Source code
[C] Machine Language
[D] Assembly Language

28/07/2021

Computer Shortcut Keys (Function keys) –
F1 key – Display Help
F2 key – To Rename the selected item
F3 key – Search for a file or a folder
F4 key – Display the Address bar list in My Computer or Windows Explorer
F5 key – Refresh the active window
F6 key – Cycle through the screen elements in a window or on the desktop
F7 key – To spell check and grammar check in MS Word document, Outlook, etc
F8 key – Used to enter the Windows startup menu, mainly used to access Windows Safe Mode
F9 key – Refresh document in Microsoft Word
F10 key – Activate the menu bar in the active program
F11 key – Maximize or minimize the active window
F12 key – Open the Save as window in Microsoft Word

28/07/2021

knowledge
Join another platform get more knowledge about computer science
https://youtube.com/channel/UC432FKHRY_Qscjr8Iii19eQ

General Computer Shortcut Keys –
Ctrl + A – Select all
Ctrl + C – Copy the selected content
Ctrl + N – Open a new console
Ctrl + V – Paste the selected content
Ctrl + W – Close the Windows Explorer or browser
Ctrl + X – Cut the selected content
Ctrl + Y – Redo an action
Ctrl + Z – Undo an action
Ctrl – while dragging an item (Copy the selected item)
Ctrl + Shift – while dragging an item (Create a shortcut of the selected item)
Ctrl + Shift +Esc – Open the Task Manager
Ctrl + Shift – With any of the arrow keys (Highlight/Select a block of text)
Ctrl + Esc – Display the Start menu
Ctrl + F4 – Close the active document in programs that enable you to have multiple documents open simultaneously
Ctrl + Click (On Underlined link or URL on document) – Opens the link in the browser
ALT + D– Select the address bar
Alt + Enter – View the properties for the selected item
Alt + F4 – Close the active item, or quit the active program
Alt + Spacebar – Open the shortcut menu for the active window
Alt + Tab – Switch between the open programs/windows
Alt + Esc – Cycle through programs/windows in the order that they had been opened
Alt + Spacebar – Display the System menu for the active window
Shift – With any of the arrow keys (Select more than one item in a window or on the desktop, or select text in a document)
Shift + F10 – Displays the shortcut menu for the selected item(Works as a right mouse click)
Delete – Delete the content and move it to Recycle bin.
Shift + Delete – Delete the selected item permanently without placing the item in the Recycle Bin
Right arrow – Open the submenu or open the next menu to the right
Left arrow – Close the submenu or open the next menu to the left
Backspace – View the folder one level up in My Computer or Windows Explorer
Esc – Cancel the current task
Shift – when you insert a CD-ROM into the CD-ROM drive (Prevent the CD-ROM from automatically playing)

26/07/2021

4 Bits = 1 Nibble
8 Bits = 1 Byte
1024 Bytes = 1 Kilo Byte ( KB )
1024 KB = 1 Mega Byte ( MB )
1024 MB = 1 Gyga Byte ( GB )
1024 GB = 1 Tera Byte ( TB )
1024 TB = 1 Peta Byte ( PB )
1024 PB = 1 Exa Byte ( EB )
1024 EB = 1 Zetta Byte ( ZB )
1024 ZB = 1 Yotta Byte ( YB )

26/07/2021

CPU = Central Processing Unit
RAM = Random Access Memory
ROM = Read Only Memory
PROM = Programmable Read Only Memory
EPROM = Erasable PROM
EEPROM = Electrically EPROM
HDD = Hard Disk Drive
FDD = Floppy Disk Drive
KBD = KeyBoard
I/O = Input & Output
CD = Compact Disk
DVD = Digital Video Disk
SMPS = Switch Mode Power Supply
POST = Power ON Self Test
BIOS = Basic Input Output System
VDU = Visible Display Unit
LED = Light Embedded Diode
LCD = Liquid Crystal Display
USB = Universal Serial Bus
VGA = Video/Visual Graphic Adapter
LAN = Local Area Network
WAN = Wide Area Network
MAN = Metropolitan Area Network
HLL = High Level Language
LLL = Low Level Language
MIPS = Million of Instruction Per Second
Mbps = Mega Bytes Per second
Kbps = Kilo Bytes per second
HTTP = Hyper Text Templates

JAD – Java Application Descriptor
3GPP – 3rd Generation Partnership Project
3GP – 3rd Generation Project
MP3 – MPEG player lll
MP4 – MPEG-4 video file
AAC – Advanced Audio Coding
GIF – Graphics Interchangeable Format
JPEG – Joint Photographic Expert Group
BMP – Bitmap
SWF – Shock Wave Flash
WMV – Windows Media Video
WMA – Windows Media Audio
WAV – Waveform Audio
PNG – Portable Network Graphics
DOC – Document (Microsoft Corporation)
PDF – Portable Document Format
M3G – Mobile 3D Graphics
M4A – MPEG-4 Audio File
NTH – Nokia Theme (series 40)
THM – Themes (Sony Ericsson)
MMF – Synthetic Music Mobile Application File
NRT – Nokia Ringtone
XMF – Extensible Music File
WBMP – Wireless Bitmap Image
DVX – DivX Video
HTML – Hyper Text Markup Language
WML – Wireless Markup Language
CD – Compact Disk.
DVD – Digital Versatile Disk.
CRT – Cathode Ray Tube.
HTTP – Hyper Text Transfer Protocol.
HTTPS – Hyper Text Transfer Protocol Secure.
URL – Uniform Resource Locator.
USB – Universal Serial Bus.
VIRUS – Vital Information Resource Under Seized.
3G – 3rd Generation.
GSM – Global System for Mobile Communication.
CDMA – Code Division Multiple Access.
UMTS – Universal Mobile Telecommunication System.
SIM – Subscriber Identity Module.
AVI – Audio Video Interleave
RTS – Real-Time Streaming
SIS – Symbian OS Installer File
AMR – Adaptive Multi-Rate Codec
JAD – Java Application Descriptor
JAR – Java Archive

DAT – Digital Audio Tape.
DOS – Disk Operating System.
GUI – Graphical User Interface.
ISP – Internet Service Provider.
TCP – Transmission Control Protocol.
UPS – Uninterruptible Power Supply.
HSDPA – High-Speed Downlink Packet Access.
EDGE – Enhanced Data Rate for GSM [Global System for Mobile Communication] Evolution.
VHF – Very High Frequency.
UHF – Ultra High Frequency.
GPRS – General Packet Radio Service.
WAP – Wireless Application Protocol.
TCP – Transmission Control Protocol.
ARPANET – Advanced Research Project Agency Network.
IBM – International Business Machines.
HP – Hewlett Packard.
AM/FM – Amplitude/ Frequency Modulation.
WLAN – Wireless Local Area Network
AVI – Audio Video Interleave
RTS – Real-Time Streaming
SIS – Symbian OS Installer File
AMR – Adaptive Multi-Rate Codec
3GPP – 3rd Generation Partnership Project
3GP – 3rd Generation Project
MP4 – MPEG-4 video file
AAC – Advanced Audio Coding
GIF – Graphic Interchangeable Format
JPEG – Joint Photographic Expert Group
BMP – Bitmap
SWF – Shock Wave Flash
WMV – Windows Media Video
WMA – Windows Media Audio
WAV – Waveform Audio
PNG – Portable Network Graphics
DOC – Document (Microsoft Corporation)
PDF – Portable Document Format
M3G – Mobile 3D Graphics
M4A – MPEG-4 Audio File
NTH – Nokia Theme (series 40)
THM – Themes (Sony Ericsson)
MMF – Synthetic Music Mobile Application File
NRT – Nokia Ringtone
XMF – Extensible Music File
WBMP – Wireless Bitmap Image
DVX – DivX Video
HTML – HyperText Markup Language
WML – Wireless Markup Language
CRT – Cathode Ray Tube.
DOS – Disk Operating System.
GUI – Graphical User Interface.
UPS – Uninterruptible Power Supply.
USB – Universal Serial Bus.
VIRUS – Vital Information Resource Under Seized.
3G – 3rd Generation.
GSM – Global System for Mobile Communication.
CDMA – Code Division Multiple Access.
UMTS – Universal Mobile Telecommunication System.
SIM – Subscriber Identity Module.
HSDPA – High-Speed Downlink Packet Access.
EDGE – Enhanced Data Rate for
GSM – [Global System for Mobile Communication] Evolution.
VHF – Very High Frequency.
UHF – Ultra High Frequency.
GPRS – General Packet Radio Service.
WAP – Wireless Application Protocol.
TCP – Transmission Control Protocol.
ARPANET – Advanced Research Project Agency Network.
IBM – International Business Machine Corporation.
HP – Hewlett Packard.
WLAN – Wireless Local Area Network

26/07/2021

 HTM: Hierarchical Temporal Memory.
 HTML: Hypertext Markup Language.
 HTTP: Hypertext Transfer Protocol.
 HTTPD: Hypertext Transfer Protocol Daemon.
 HAL: Hardware Abstraction Layer.
 HCI: Human-Computer Interaction.
 HID: Human Interface Device.
 HIG: Human Interface Guidelines.
 HP: Hewlett-Packard.
 HPFS: High-Performance File System.
 HT: Hyper-Threading.
 HD: High Density.
 HDD: Hard Disk Drive.
 HD DVD: High Definition DVD.
 HDL: Hardware Description Language.
 HHD: Hybrid Hard Drive.
 HTX: Hyper Transport Expansion.
 HURD: Hird of Unix-Replacing Daemons.

25/07/2021