# The Ultimate Computer Quiz! From Easy To Hard Questions

20 Questions | Total Attempts: 174

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• 1.
How many 3-line-to-8-line decoders are required for a 1-of-32 decoder?
• A.

1

• B.

2

• C.

4

• D.

8

• 2.
Race around condition may occur when J and K are
• A.

0,1

• B.

1,0

• C.

0,0

• D.

1,1

• 3.
One example of the use of an S-R flip-flop is as a(n):
• A.

Binary storage register

• B.

Racer

• C.

Astable oscillator

• D.

Transition pulse generator

• 4.
The primary use for Gray code is:
• A.

Coded representation of a shaft's mechanical position

• B.

Turning on/off software switches

• C.

To represent the correct ASCII code to indicate the angular position of a shaft on rotating machinery

• D.

To convert the angular position of a shaft on rotating machinery into hexadecimal code

• 5.
Why is the fan-out of CMOS gates frequency dependent?
• A.

Each CMOS input gate has a specific propagation time and this limits the number of different gates that can be connected to the output of a CMOS gate.

• B.

When the frequency reaches the critical value, the gate will only be capable of delivering 70% of the normal output voltage and consequently the output power will be one-half of normal; this defines the upper operating frequency.

• C.

The higher the number of gates attached to the output, the more frequently they will have to be serviced, thus reducing the frequency at which each will be serviced with an input signal.

• D.

The input gates of the FETs are predominantly capacitive, and as the signal frequency increases the capacitive loading also increases, thereby limiting the number of loads that may be attached to the output of the driving gate.

• 6.
• A.

Determine sign and magnitude

• B.

Reduce propagation delay

• C.

Add a 1 to complemented inputs

• D.

Increase ripple delay

• 7.
What is a shift register that will accept a parallel input, or a bidirectional serial load and internal shift features, called?
• A.

Tristate

• B.

End round

• C.

Universal

• D.

Conversion

• 8.
• A.

Use the Q output of the first FF.

• B.

Use the Q output of the last FF.

• C.

Tie all of the Q outputs together.

• D.

Use the Q output of each FF.

• 9.
When using even parity, where is the parity bit placed?
• A.

Before the MSB

• B.

After the LSB

• C.

In the parity word

• D.

After the odd parity bit

• 10.
A settable flip-flop's normal starting state when power is first applied to a circuit is always the ________ state.
• A.

Reset

• B.

Set

• C.

Toggle

• D.

Dual

• 11.
Why is a pull-up resistor needed for an open collector gate?
• A.

To provide Vcc for the IC

• B.

To provide ground for the IC

• C.

To provide the HIGH voltage

• D.

To provide the LOW voltage

• 12.
Which logic family is characterized by a multiemitter transistor on the input?
• A.

TTL

• B.

CMOS

• C.

ECL

• D.

None of the above

• 13.
What is one disadvantage of an S-R flip-flop?
• A.

It has no enable input

• B.

It has an invalid state

• C.

It has no clock input

• D.

It has only a single output

• 14.
• A.

10

• B.

8

• C.

5

• D.

4

• 15.
MOD-6 and MOD-12 counters are most commonly used as:
• A.

Frequency counters

• B.

Multiplexed displays

• C.

Digital clocks

• D.

Power consumption meters

• 16.
Which of the following logic families has the highest maximum clock frequency?
• A.

S-TTL

• B.

AS-TTL

• C.

HS-TTL

• D.

HCMOS

• 17.
Which of the following logic families has the shortest propagation delay?
• A.

S-TTL

• B.

AS-TTL

• C.

HS-TTL

• D.

HCMOS

• 18.
Which of the logic families listed below allows the highest operating frequency?
• A.

74AS

• B.

54S

• C.

ECL

• D.

HCMOS

• 19.
Which search engine was named KUMO during its internal testing?
• A.

• B.

Yahoo

• C.

Bing

• D.

Baidu

• 20.
Who is the author of "Fault Lines : How hidden fractures still threaten the world economy" ?
• A.

Manmohan Singh

• B.

D.Subba Rao

• C.

Raghuram Rajan

• D.

Amitav Ghosh

• 21.
In the digital clock project, what type of counter is used to count to 59 seconds?
• A.

MOD-60

• B.

MOD-6

• C.

BCD

• D.

BCD followed by MOD-6

• 22.
Who is the only Indian to have been awarded the title 'Hero of the Soviet Union' ?
• A.

Rakesh Sharma

• B.

Abdul Kalam

• C.

Ravish Malhotra

• D.

• 23.
GT, Antara,Insignia and Ampera are key brands of which company?
• A.

Renault

• B.

Opel

• C.

Daewoo

• D.

BMW

• 24.
Who is the first Indian to win a medal in Olympics in Badminton?
• A.

Pullela Gopichand

• B.

Saina Nehwal

• C.

Parupalli Kashyap

• D.

P.V. Sindhu

• 25.
Arachnophobia refers to the fear of ______________?
• A.

Cockroaches

• B.

Spider

• C.

Honey bees

• D.

Ants

• 26.
Who is regarded as the "father of modern observational Astronomy" ?
• A.

Nicolaus Copernicus

• B.

Johannes Kepler

• C.

Sir Isaac Newton

• D.

Galileo Galilei

• 27.
Which American Computer company is called BIG BLUE?
• A.

IBM

• B.

Compaq corporation

• C.

Microsoft

• D.

Tandy svenson

• 28.
Which celebrity became the first Indian to cross 1 million follower mark on Twitter ?
• A.

A.R.Rahman

• B.

Sachin Tendulkar

• C.

Narendra Modi

• D.

Amitabh Bachchan

• 29.
Diamond is a paramagnetic material
• A.

True

• B.

False

• 30.
The new technology unveiled by a team at MIT which can charge a phone upto 30 cm away
• A.

MagMIMO

• B.

Q1.1

• C.

PMA

• D.

Rezence

• 31.
OpenSSL, websites can provide encrypted information to visitors, so the data transferred cannot be seen by others while it goes from your computer to the website. Version 1.0.1 of OpenSSL, released on April 19th, 2012, has a little bug that allows a person to retrieve information on the memory of the web server without leaving a trace. Name the bug
• A.

Heartbleed

• B.

Shellshock

• C.

Ice IX

• D.

SpyEye

• 32.
The next windows OS after Windows 8.1
• A.

Windows 9

• B.

Windows 10

• C.

Windows 6.4

• D.

Windows 8.2

• 33.
The bug which has stemmed from coding mistakes in bash, a low-level computer program that's been part of many, but not all, Unix-related systems for decades, Thereby making it mostly a problem for servers that run Unix, Linux or other similar operating-system variants
• A.

Heartbleed

• B.

Shellshock

• C.

Ice IX

• D.

SpyEye

• 34.
Apple has released updates to insulate Mac OS X systems from the dangerous the following bug, a pervasive vulnerability that is already being exploited in active attacks.
• A.

Heartbleed

• B.

Shellshock

• C.

SpyEye

• D.

Ice IX

• 35.
When was the  first great Internet Slowdown — a protest by some of the web’s largest companies over the FCC and US government’s handling of net neutrality
• A.

September 10,2014

• B.

June 10,2014

• C.

May 10,2014

• D.

March 10,2014

• 36.
The Google X team has been working for two years on a self flying drone-based delivery system on drone based delivery system project named
• A.

Project Wing

• B.

Project Fly

• C.

Project shield

• D.

Project constitute

• 37.
This game was removed from both Apple's App Store and Google Play by its creator on February 10, 2014, due to guilt over what he considered to be its addictive nature.
• A.

Swing Copter

• B.

Flappy Bird

• C.

Clumpsy bird

• D.

Fly bird

• 38.
Which of the following,used in mobiles is used to measure the orientation or vertical and horizontal positioning of the phone. The most basic application of this is the device knowing when to alternate the view of the screen depending on how you are holding it.
• A.

Accelerometer

• B.

Speedometer

• C.

Gyroscope

• D.

None of the above

• 39.
Shelfari is a social cataloging website for books. Shelfari users build virtual bookshelves of the titles they own or have read, and can rate, review, tag, and discuss their books. Which company is offering this service?
• A.

Amazon

• B.

Intel

• C.

Microsoft

• D.

Infosys

• 40.
What is Mozilla's online paying application called?
• A.

Mozpay

• B.

Mozmoney

• C.

Mozwallet

• D.

None of the above

• 41.
Who coined the term "Artificial Intelligence"?
• A.

John McCarthy

• B.

John Carter

• C.

John Raver

• D.

John Nash

• 42.
NASA scientist developed which of the following satellites in order to mitigate droughts?
• A.

CAMP

• B.

DAMP

• C.

SAMP

• D.

RAMP

• 43.
Which version of Windows phone OS runs on the Lumia series of smartphones by Nokia?
• A.

Mango

• B.

Plum

• C.

Lemon

• D.

Berry

• 44.
Which site helps users copy another person’s photos and put them on instagram as their own?
• A.

Insta Slash

• B.

Insta Mix

• C.

Insta Spark

• D.

Insta Pixel

• 45.
The value of BDC
• A.

Is fixed for any particular transistor.

• B.

Varies with temperature.

• C.

Varies with IC.

• D.

Varies with temperature and IC

• 46.
Arrrange the following the regions in ascending order according to their width.
• A.

Base,emitter,collector

• B.

Emitter, collector, base

• C.

Base, collector, emitter

• D.

Collector,emitter,base

• 47.
For normal operation of a pnp BJT, the base must be ________ with respect to the emitter and ________ with respect to the collector
• A.

Positive, negative

• B.

Positive, positive

• C.

Negative, positive

• D.

Negative, negative

• 48.
• A.

Saturation and active

• B.

Active and cutoff

• C.

Saturation and cutoff

• D.

None of the above

• 49.
What is the order of doping, from heavily to lightly doped, for each region?
• A.

Base, collector, emitter

• B.

Emitter, collector, base

• C.

Emitter, base, collector

• D.

Collector, emitter, base

• 50.
The output frequency of a full-wave rectifier diode circuit is ________ the input frequency
• A.

Half

• B.

Quarter

• C.

Equal to

• D.

Twice

• 51.
In a regulated supply, what term describes how much change occurs in the output voltage for a given change in the input voltage?
• A.

• B.

Line regulation

• C.

Voltage regulation

• D.

Ripple voltage

• 52.
What type of diode circuit is used to add or restore a dc level to an electrical signal?
• A.

Clamper

• B.

Clipper or limiter

• C.

IC voltage regulator

• D.

None of the above

• 53.
What best describes the circuit?
• A.

Full wave rectifier

• B.

Half wave rectifier

• C.

Clipper

• D.

Clamper

• 54.
Which diode(s) has (have) a zero level current and voltage drop in the ideal model?
• A.

Si

• B.

Ge

• C.

Both Si and Ge

• D.

Neither Si nor Ge

• 55.
• A.

Full wave rectifier

• B.

Half wave rectifier

• C.

Clipper

• D.

Clamper

• 56.
The Schottky diode is used
• A.

In circuits requiring negative resistance

• B.

In very fast-switching circuits

• C.

In power supply rectifiers

• D.

In high-power circuits

• 57.
Rectifiers are commonly used in battery chargers
• A.

True

• B.

False

• 58.
Refer to this figure. Which symbol is correct for an LED?
• A.

A

• B.

B

• C.

C

• D.

D

• E.

E

• 59.
Refer to this figure. Identify the Schottky diode
• A.

A

• B.

B

• C.

C

• D.

D

• E.

E

• 60.
The normal operating region for a zener diode is the
• A.

Forward bias

• B.

Reverse bias

• C.

Zero crossing

• D.

Reverse breakdown

• 61.
What type of diode is commonly used in electronic tuners in TVs?
• A.

Varactor

• B.

Gunn

• C.

Schottky

• D.

LED

• 62.
A laser diode normally emits
• A.

Coherent light

• B.

Monochromatic light

• C.

Both coherent and monochromatic light

• D.

Neither coherent nor monochromatic light

• 63.
A varactor diode is a pn junction diode that always operates in ________-bias and is doped to ________ the inherent capacitance of the depletion region
• A.

Forward, maximize

• B.

Reverse, maximize

• C.

Reverse, minimize

• D.

Forward, minimize

• 64.
• A.

From source to drain

• B.

From source to gate

• C.

From drain to gate

• D.

From drain to source

• 65.
Three Japanese scientists have received the 2014 Nobel Prize in Physics for inventing the following in mid 1990s
• A.

A nuclear battery which could power a Smartphone forever

• B.

Blue LED

• C.

Brain’s “inner GPS “system

• D.

None of the above

• 66.
2014′s Nobel Prize for Physiology or Medicine has been awarded to John O’Keefe, May-Britt Moser, and Edvard Moser for their discovery of
• A.

Brain’s “inner GPS “system

• B.

Ebola-killing robot

• C.

Blue LED

• D.

None of the above

• 67.
Which of the following uses an electromagnet to mechanically operate as a switch?
• A.

Relay

• B.

Rheostat

• C.

Potentiometer

• D.

Transducer

• 68.
What are resistors generally made up of?
• A.

Carbon

• B.

Silicon

• C.

Germanium

• D.

Ceramic

• 69.
Which of the following mobile phone technologies was the first to use SIM cards?
• A.

CDMA

• B.

GSM

• C.

TDMA

• D.

EDGE

• 70.
Removing a cell phone provider's programing from your phone is known as
• A.

Flashing

• B.

Hacking

• C.

Cloning

• D.

Tracking

• 71.
What happens when a cell phone is cloned?
• A.

The programing is erased

• B.

The address book is copied onto another phone

• C.

The cellular phone company restores the phone to factory condition

• D.

The phone's information is copied

• 72.
Which among the following is Pranav Mistry's breakthrough invention?
• A.

Sixth Sense

• B.

GlassUp

• C.

CastAR

• D.

Laster SeeThru

• 73.
What is the technology employed by the “Google Driverless Car” ?
• A.

Ultrasonics

• B.

LIDAR

• C.

• D.

LASER

• 74.
Choose the right statement.
• A.

'Kinect' is more accurate than 'Leap motion'

• B.

'Kinect' is cheaper than 'Leap motion'

• C.

'Leapmotion' is the best choice to perform tasks such as high precision drawing and website navigation

• D.

'Leap motion' is more suitable for whole body tacking in a space the size of a living room

• 75.
What is 'Oculus Rift' ?
• A.

Motion sensing switch

• B.

• C.

Virtual reality mobile application

• D.

An operating system

• 76.
Choose the right statement
• A.

Augmented reality embeds digital information into real world contexts

• B.

Virtual reality embeds digital information into real world contexts

• C.

Augmented reality creates digital contexts that behave in ways that mimic real world

• D.

Both b and c

• 77.
World' first 64 bit ANDROID phone
• A.

Iphone 5s

• B.

Lenovo vibe z2

• C.

HTC desire t10

• D.

Vibe x2

• 78.
A 555timer can be used in which of the following configurations
• A.

Astable, monostable

• B.

Monostable, bistable

• C.

Astable, toggled

• D.

Bistable, tristable

• 79.
Which is a type of electrically-erasable programmable read only memory?
• A.

Flash

• B.

Flange

• C.

FRAM

• D.

Fury

• 80.
Which motor is not suitable for use as a dc machine?
• A.

Permanent magnet motor

• B.

Series motor

• C.

Squirrel cage motor

• D.

Synchronous motor

• 81.
After the first photons of light are produced , which process is responsible for amplification of the light?
• A.

• B.

Stimulated emission

• C.

• D.

Einstein's oscillation

• 82.
When the number of secondary turns in the transformer is increased, secondary current will
• A.

Increase

• B.

Decrease

• C.

Remains constant

• D.

First increases then decreases

• 83.
A transponder is a satellite equipment which
• A.

Receives a signal from earth station and amplifies

• B.

Changes the frequency of the received signal

• C.

• D.

Does all of the above mentioned functions

• 84.
What is (void*)0
• A.

Representation of null pointer

• B.

Representation of void pointer

• C.

Error

• D.

None of the above

• 85.
The first step to getting output from a laser is to excite an active medium. What is this process called?
• A.

Pumping

• B.

Priming

• C.

Exciting

• D.

Raising

• 86.
'.INI' extension refers usually to what kind of file?
• A.

Image Color Matching Profile file

• B.

Hypertext related file

• C.

Image file

• D.

System file

• 87.
ASCII  value of 0 is
• A.

47

• B.

48

• C.

49

• D.

50

• 88.
Who co-founded Hotmail in 1996 and then sold the company to Microsoft?
• A.

Shawn Fanning

• B.

• C.

Sabeer Bhatia

• D.

Ray Tomlinson

• 89.
'.JPG' extension refers usually to what kind of file?
• A.

MS Encarta document

• B.

Animation/movie file

• C.

System file

• D.

Image file

• 90.
Compact discs (according to the original CD specifications) hold how many minutes of music?
• A.

74 mins

• B.

56 mins

• C.

60 mins

• D.

90 mins

• 91.
Which of the following is not a search engine
• A.

Aol Search

• B.

• C.

• D.

Archie

• 92.
Which of the following operating systems is produced by IBM?
• A.

OS-2

• B.

Windows

• C.

UNIX

• D.

DOS

• 93.
A computer virus that actively attacks an anti-virus program or programs in an effort to prevent detection is...
• A.

Retrovirus

• B.

Worm

• C.

Trojan Horse

• D.

Ghost Virus

• 94.
Which of the following is a non metal that remains liquid at room temperature?
• A.

Phosphorus

• B.

Bromine

• C.

Chlorine

• D.

Helium

• 95.
Who developed Yahoo?
• A.

Dennis Ritchie & Ken Thompson

• B.

David Filo & Jerry Yang

• C.

Vint Cerf & Robert Kahn

• D.

Steve Case & Jeff Bezos

• 96.
Which standard library function will you use to find the last occurance of a character in a string in C?
• A.

Strnchar()

• B.

Strchar()

• C.

Strrchar()

• D.

Strrchr()

• 97.
Which of the following gate can be used as basic Comparator ?
• A.

OR

• B.

AND

• C.

EX-NOR

• D.

NAND

• 98.
Which of the following is used as a moderator in nuclear reactor?
• A.

Thorium

• B.

Graphite

• C.

• D.

Heavy water

• 99.
What is the wavelength of visible spectrum?
• A.

8500 - 9800 angstrom

• B.

7800 - 8000 angstrom

• C.

3900 - 7600 angstrom

• D.

1300 - 3000 angstrom

• 100.
Because microprocessor CPUs do not understand mnemonics as they are, they have to be converted to ________.
• A.

• B.

Binary machine code

• C.

Assembly language

• D.

All of the above

• 101.
Which of the following is not a logical operator?
• A.

&

• B.

&&

• C.

||

• D.

!

• 102.
Which part of a database that holds only one type of information?
• A.

Report

• B.

Field

• C.

Record

• D.

File

• 103.
'.MOV' extension refers usually to what kind of file?
• A.

Image file

• B.

Animation/movie file

• C.

Audio file

• D.

MS Office document

• 104.
Who is largely responsible for breaking the German Enigma codes and created a test that provided a foundation for artificial intelligence?
• A.

Alan Turing

• B.

Jeff Bezos

• C.

George Boole

• D.

Charles Babbage

• 105.
Which was an early mainframe computer?
• A.

ENIAC

• B.

UNIC

• C.

BRAINIA

• D.

FUNTRIA

• 106.
A coating of dust on a computer's main circuit boards has this probable consequence
• A.

Overheating

• B.

Short circuits

• C.

Slower hard disk

• D.

None

• 107.
Which of these is not a computer?
• A.

Paseo

• B.

MacIntosh

• C.

Aptiva

• D.

Acorn

• 108.
ASCII and EBCDIC differ in
• A.

Their efficiency in storing data

• B.

The random and sequential access method

• C.

The number of bytes used to store characters

• D.

Their collecting sequences

• 109.
An OR gate can be imagined as
• A.

Switches connected in series

• B.

Switches connected in parallel

• C.

MOS transistors connected in series

• D.

All of the above

• E.

None of the above

• 110.
The colour code for the resistor whose value is 47Kohms with a tolerance of 10% is
• A.

Yellow, violet, orange,gold

• B.

Orange, blue, red, gold

• C.

Yellow, violet, orange, silver

• D.

Orange, blue, red,silver

• 111.
The breakdown occurs in a zener diode due to electron quantum tunneling under high electric field strength
• A.

True

• B.

False

• 112.
Who co-created the UNIX operating system in 1969 with Dennis Ritchie?
• A.

Bjarne Stroustrup

• B.

Steve Wozniak

• C.

Ken Thompson

• D.

Niklaus Wirth

• 113.
What Designates where the next action occurs?
• A.

Select

• B.

Decode

• C.

Motherboard

• D.

Highlight

• 114.
The purpose of choke in tube light is ?
• A.

To decrease the current

• B.

To increase the current

• C.

To decrease the voltage momentarily

• D.

To increase the voltage momentarily

• 115.
A special transformer used to convert unbalanced signals to balanced signals is the
• A.

Center-tapped transformer

• B.

Step-across transformer

• C.

Autotransformer

• D.

Balun

• 116.
Who first proposed the theory of lasers?
• A.

Albert Einstein

• B.

Neils Bohr

• C.

Magellan

• D.

Leonardo da Vinci

• 117.
"Superlenses" made from nanomaterials may enable scientists to do which of the following?
• A.

Travel faster than light

• B.

See through walls

• C.

Optically view DNA

• D.

None of the above