Who invented vacuum tubes?
John Bardeen
William Shockley
Lee de Forest
All of above
Correct Answer :
C. Lee de Forest
Related Questions
The commonly used standard data code to represent alphabetical, numerical and punctuation characters used in electronic data processing system is called
ASCII
EBCDIC
BCD
All of above
What does DMA stand for?
Distinct Memory Access
Direct Memory Access
Direct Module Access
Direct Memory Allocation
The output quality of a printer is measured by
Dots per inch
Dot per sq. inch
Dots printed per unit time
All of above
A normal CD-ROM usually can store up to data?
680 KB
680 Bytes
680 MB
680 GB
A storage area used to store data to a compensate for the difference in speed at which the different units can handle data is
Memory
Buffer
Accumulator
Address
The Second Generation Computer was based on ________.
Vacuum Tube
Silicon Chips
Transistor
Bio Chips
Which of the following is not an electronic computer?
ENIAC
ABC
UNIVAC
EDVAC
BCD is
Binary Coded Decimal
Bit Coded Decimal
Binary Coded Digit
Bit Coded Digit
Which of the following is not valid statement?
Hard is referred to mean something temporary
Hard is used to mean something tangible
Soft is used to mean something permanent
Soft is used to mean something tangible
________is a combination of hardware and software that facilitates the sharing of information between computing devices.
network
peripheral
expansion board
digital device
A physical connection between the microprocessor memory and other parts of the microcomputer is known as
Path
Address bus
Route
All of the above
RAM is also called as
Read / Write Memory
Long Memory
Permanent Memory
Primary Memory
A paper printout of a document is known as
Softcopy output
Hardcopy output
Permanent Output
All of above
Which of the following is not a form of data?
numbers and characters
images
sound
none of above
The word processing task associated with changing the appearance of a document is
Editing
Writing
Formatting
All of above
Microprocessors as switching devices are for which generation computers?
First Generation
Second Generation
Third Generation
Fourth Generation
Computers with 80286 microprocessor is
XT computer
AT computers
PS/2 computer
None of above
Which of the following disk is fixed disk?
Hard Disks
Flash Disks
Blu-Ray Disks
DVDs
The word Abacus is derived from Abax, a word from
Latin language
Greek Language
Sanskrit language
Ancient Egypt
Software in computer
Enhances the capabilities of the hardware machine
Increase the speed of central processing unit
Both of above
None of above
The ALU of a computer responds to the commands coming from
Primary memory
Control section
External memory
Cache memory
An output device that uses words or messages recorded on a magnetic medium to produce audio response is
Magnetic tape
Voice response unit
Voice recognition unit
Voice band
What is the name of the new color laptop computer which is powered by a 386 processor at 33 MHz and is built by Epson?
AX3/33
NEC-20
Magnum 2000
HCL-3000
What is the main difference between a mainframe and a super computer?
Super computer is much larger than mainframe computers
Super computers are much smaller than mainframe computers
Supercomputers are focused to execute few programs as fast as possible while mainframe uses its power to execute as many
Supercomputers are focused to execute as many programs as possible while mainframe uses its power to execute few programs as fast as possible.
Word length of a Personal Computer is ___
4 bits
8 bits
16 bits
64 bits
Which of the following is not purely output device?
Screen
Printer
Speaker
Plotter
________ is the key to close a selected drop -down list; cancel a command and close a dialog box.
TAB
SHIFT
ESC
F10
An approach that permits the computer to work on several programs instead of one is
On-line thesaurus
Multiprogramming
Over lapped processing
Outline processor
The language that the computer can understand and execute is called
Machine language
Application software
System program
All of above
The scrambling of code is known as:
Encryption.
firewall.
Scrambling.
Password proofing.