Tech Flashcards
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Lynx
Aperture
the less the better photo, f1.2 better than f5
Bokeh
Subject is in focus and background is blurred
ISO
light sensitivity, 100 means less sensitive 1400 sensitive
raw file
lots of info about colors
EIS & OIS
OIS is hardware based, EIS is software based
Optical, digital & hybrid zoom
Optical(hardware based) - lossless, digital zoom zooms the photo with quality loss, hybrid is optical + digital zoom
HDR
makes the photo equally bright in exposures by taking over and underexposed photos and combining them
TOF
time of flight measures the depth of sub with the backgound with infrared
Ultrawide lens
Ultrawide lens is more wide so we get wider picture
Raster VS vector format
Raster format is pixel based, uncompressed, big file
Vector format is stored mathematical calculations, lossless
JPEG
Joint Photographic Experts Group
PNG
Portable Network Graphics, lossless, transparent bg possible
GIF
Graphics Interchange Format, only 256 colors, patent free
TIFF
Tagged image file format, big file size, large color gamut
BMP
Bitmap BMP by windows, used for printing, big file
IP Rating
Ingress protection rating
CPU cores
CPU cores- prime, efficiency, performance
Prime core heavy tasks
Efficiency core battery saving tasks
Performance cores mid level tasks
Use of 1.1.1.1
1.1.1.1 dns service by cloud flare, who can put our website in a content delivery network which can absorb ddos attacks, it doesn’t keep logs
ISP
Image signal processor - auto focus, Inst capture, stabilization
Steps for photography
Clean lens, exposure, focus, take big photo then crop, use pro mode, edit with editor, keep hdr at auto
DDR 4 VS DDR 5
ddr 4: max bandwidth 3.2Gbps, 1600-3200MHz frequency, power management on motherboard, 1 channel, , burst length of 8, max capacity 32Gb per stick
ddr 5: max bandwidth 6.4Gbps, 3200-6400MHz, on RAM stick, power efficient, 2 channels, burst length of 16, 128GB per stick
shutter speed=
Shutter speed = 2×frame rate
VSNL
विदेश संचार निगम लिमिटेड
digital cryptographic key is used to
authenticate
Passkey Authentication support by chrome
login without otp or password
click farms
automatically downloading apps and softwares and auto reviewing it to increase the rating of it
call forwarding code
403phonenumber#
all files can still be accessed through your browser by
file:///sdcard/
generate 32 words in docs
=rand()
get related results
related:searchterm
clear traces of browsing in incognito
after incognito browsing, enter brave://net-internals/#dns and clear host resolver cache
get computer info
run msinfo32
features of Premiere Pro
Lumetry scopes where we read the waves from left to right with a graph of Y axis 0-100, we can modify the exposures and make the waves approach 100. then RGB parade, equilizing the 3 channels(RGB) and Vectroscope to adjust skin tone (RGB waves)
Core functions of Mobile device management
Enable, Secure & Manage
remove traces of metadata from pictures by?
Don’t give camera & location permission to whatsapp as it could be found out through site called exif.regex.info through which anyone can know your location
things for file sharing
web hosting, domain name and file sharing software
While receiving an international call, if an Indian number or no number is displayed on your phone, contact
DoT toll free number 1800 110 420 / 1963
malvertising
Infections delivered through malvertising does not require any user action (like clicking) to compromise the system and it does not exploit any vulnerabilities on the website or server it is hosted from
play video at a timestamp
At the end of URL type &t=1m45s skip intro of video by url &start=120s only sec allowed
search for an image of a particular quality
searchterm imagesize: 1980x1080
what is B-roll
supplemental or alternativefootage intercut with the main shot.
ATX power connector
Connects power supply to motherboard
Start Safe Mode
- pressing F8 at startup or
- troubleshoot >advanced settings > startup settings > 4 or
Incase of fraudulent SMS, calls or URLs
Immediately dial 1930 or register complaint on cybercrime.gov.in
ms powertoys used to:
remap keyboard shortcut
client is also known as
end-user
Uptime VS Runtime
Uptime is time since reboot and runtime is time for program execution in a pc
Complaint not responded to by your bank/NBFC/e-wallet for 30 days/not satisfied with the reply received?
Approach RBI Ombudsman athttps://cms.rbi.org.in. -RBI
How to set icon for drive?
Get a picture with bmp format and make a file with [autorun] enter icon = filename.bmp and save as autorun.inf then move the pic and file to the drive and hide it
Make the menu appear
Alt + F - Makes the menu bar appear (if hidden)
list of users who have access to the PC
Run netplwiz
view password of any internet connection
ctrl panel>Net & Internet>Net sharing centre>click on that connection>wireless prop>security
Inspect tab
F12
to read blogs without signing up
archive.is/website_name
RJ
Registered Jack
BRD
blue ray disk
Plotter used for
mass printing
what is block transfer
transfer btw CPU & cache
Seek Time VS Latency time VS Access time
Amount of time it takes a hard drive’s read/write head to find the physical location of a piece of data on the disk.
Time required to move the disk arm to the required track
Latency is average time for the sector being accessed to rotate into position under a head, after a completed seek.Define latency, transfer and seek time with respect to disk I/O
time it takes for the beginning of the required sector to reach the head
Access time = Seek + Latency
Display the password of wifi using cmd
Run as admin
netsh wlan show profile
When it shows all profiles,
… profile name=”that_name” key=clear
Hub
all messages are broadcasted to all, cheap, simple, used in LAN, half duplex, robust. If hub failed the network will fail, no security
Switch
Send privately, identifies devices with MAC address, smarter than hub, unicast, secure, full duplex,transmission is possible via mac address, expense, if it fails the net will fail
Router
Chooses free path for data transmission, receives data packets, analyses, forwards to sender, high speed, both wire + wireless, expensive, complex, less security
Repeater
Boosts weak signal, regenerates signal, wire + wireless, cheap, extends signal length, many of them are needed
Bridge
Connects diff networks, data transmission, uses all layers of OSI, we can’t access internet w/o it, secure, expensive, slow speed
NIC
NIC - Network interface card, types: internal + external, internal card is inserted wih motherboard + RJ45, external card types: wire + wireless, not secure, not portable
Modem
Modulator demodulator, btw computer & telephone line, modulator converts digital to analog signal
IMAP
Internet mail access protocol
FTP Port
21
SMTP port
25
PPP port
110
IMAP port
143
HTTP port
80
HTTPS port
443
TCP
Connection oriented protocol, reliable, slower than UDP, header size is 20 bytes
UDP
Connectionless protocol, not reliable, faster than TCP, header byte size is 8 bytes
Simplex
Uni- directional like loudspeaker, keyboard
Half duplex
Bi-directional but not at the same time like walkie talkie
Full Duplex
bidirectional at the same time like telephone
Parallel data transmission
Transmission of multiple data bits via multiple channels
Serial data transmission
Transmission of data bits 1 at a time over 1 channel, types: synchronous, asynchronous
Synchronous
Lot of data sent in a block, each block has many characters
Asynchronous
Only 1 character is sent at a time, uses start(0) or stop(1) to transfer data
MIME
Multipurpose internet mail extension
MAC Address length
48 bits
IPv4 VS IPv6
IPv4 - 32 bits, 4 octet, 0-255, 4Billion
IPv6 - 128 bits, 8 octet, 0-65535, 340 trillion
Server
Provides backup, secure, storage, typesv file server, app server, web server, database server
Unguided Media VS guided media
Guided media - wired, uses conductor to transmit signal, provjdes direction to signal, fast, coacial, optical fibre
Encrypt directory
cipher /e or /d F:/Filepath/
Removes traces of deleted files
cipher /w:F:/Filepath/
Filter paper test
Pure petrol evaporates but unpure petrol shows a mark on the filter paper indicating the presence of some ‘मिलावट’
Density test:
Using thermometer & hydrometer, pure petrol has 710kg/m³ to 770kg/m³
Focal length:
Distance btw optical center & sensor plane
50mm field of view lens is called:
normal lens
Wide angle lens have ________mm field of view
> 50mm
Fisheye lenses
Lenses that have an FOV of 180°
Telephoto lens
If FOV are > 50mm
Prime vs zoom lenses:
prime: 1 focal length, also called fixed lenses, sharp, large aperture.
Zoom has variable focal length, convinient, flexible, save space & weight
Types of zoom lenses:
Variable & constant aperture
Minimum focus distance:
Minimum dist btw camera & subject only to which the lense can focus
SPF
Sender policy framework
DKIM
Domain keys identified mail
DMARC
Domain-based message authentication reporting & conformance
ADSL
assymetric digital subscriber line
UDF
Universal disk format
i3 vs i5 vs i7
i3 - dualcore + hyperthreading
i5 - quadcore + no hyperthreading + turboboost
i7 - hyperthreading + quadcore + turboboost + kernel
what is carding
stealing info from magnetic strip
codec
compression tech for converting analog to digital
SD vs SDHC vs SDXC vs UHS 1
SD - 4GB
SDHC - 64GB
SDXC - 2TB
UHS - 4k recording
Shen PC shows black screen with just mouse pointer, reset graphics card by
Win + Ctrl + Shift + B
types of mail delivery
local - gmail to gmail
outbound - gmail to yahoo
Using HTTPS data is encrypted using
SSL or TLS
pop3 requires
authenticaiton
AVOD
Advertising Video On Demand
SVOD
Subscription Video On Demand
TVOD
Transaction Video On Demand
VPS hosting has _______ no. of sites on the server than a shared hosting
Less
First village of india
Uttarakhand
A.P capital
Vishakhapatnam
China capital
Beijing
0 discrimination day
1st march
world book and copyright day
23 apr
world wildlife day
3rd march
RCS
Rich communication system
RFR
Rapid security response
WWDC
World wide Developer Conference
