Who invented vacuum tubes?
John Bardeen
William Shockley
Lee de Forest
All of above
Correct Answer :
C. Lee de Forest
Related Questions
When was vacuum tube invented?
1900
1906
1910
1880
CD-ROM is a
Semiconductor memory
Memory register
Magnetic memory
None of above
What are the computers called that performs calculations and comparisons usually in the binary numbering system?
Analog Computers
Digital Computers
Hybrid Computers
None of above
Which type of computers uses the 8-bit code called EBCDIC?
Minicomputers
Microcomputers
Mainframe computers
Super computer
A physical connection between the microprocessor memory and other parts of the microcomputer is known as
Path
Route
Address bus
All of the above
Computer operators
writes computer programs for specific problems
operate the device which input and output data from the computer
normally require a college degree in computer science
all of the above
Which of the following statement is valid?
Lady Augusta is the first programmer
Ada is the daughter of Lord Byron, a famous English poet
ADA is a programming language developed by US Defense
All of above
The contents of information are stored in
Memory data register
Memory address register
Memory arithmetic registers
Memory access register
Which statement is valid about interpreter?
It translates one instruction at a time
Object code is saved for future use
Repeated interpretation is not necessary
All of above
Daisy wheel printer is a type of
Matrix printer
Impact printer
Laser printer
Manual printer
Word length of a Personal Computer is
4 bits
8 bits
16 bits
64 bits
ASCII and EBCDIC are the popular character coding systems. What does EBCDIC stand for?
Extended Binary Coded Decimal Interchange Code
Extended Bit Code Decimal Interchange Code
Extended Bit Case Decimal Interchange Code
Extended Binary Case Decimal Interchange Code
A high quality CAD system uses the following for printing drawing and graphs
Dot matrix printer
Digital plotter
Line printer
All of the above
The secondary storage devices can only store data but they cannot perform
Arithmetic Operation
Logic operation
Fetch operations
Either of the above
The arranging of data in a logical sequence is called
Sorting
Classifying
Reproducing
Summarizing
ENIAC uses
Decimal Numbering System
Octal Numbering System
Binary Numbering System
Hexadecimal Numbering System
Which of the following are the best units of data on an external storage device?
Bits
Bytes
Hertz
Clock cycles
When creating a computer program, the ________ designs the structure of the program
End user
System Analyst
Programmer
All of the above
Which technology is more reliable?
Mechanical
Electro-Mechanical
Electronic
For reliability it does not matter. So all of above are reliable
The storage subsystem in a microcomputer consists mainly of __ or __ media with varying capacities
Memory or video
Magnetic or optical
Optical or memory
Video or magnetic
Which computer was considered the first electronic computer until 1973 when court invalidated the patent?
ENIAC
MARK I
Z3
ABC
When did arch rivals IBM and Apple Computers Inc. decide to join hands?
1978
1984
1990
1991
The output quality of a printer is measured by
Dots per inch
Dot per sq. inch
Dots printed per unit time
All of above
Floppy disks are available in
Single side single density
Single side double density
Both of above
None of above
A register organized to allow to move left or right operations is called a
Counter
Loader
Adder
Shift register
A term associated with the comparison of processing speeds of different computer system is:
EFTS
MPG
MIPS
CPS
What is the date when Babbage conceived Analytical engine
1642
1837
1880
1850
Which of the following printers are you sure will not to use if your objective is to print on multi carbon forms?
Daisy wheel
Dot matrix
Laser
Thimble
Reading data is performed in magnetic disk by
Read/write leads
Sectors
Track
Lower surface
Data becomes ________ when it is presented in a format that people can understand and use
processed
graphs
information
presentation