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Why are vacuum tubes also called valves?

A. Because they can amplify the weak signals and make them strong

B. Because they can stop or allow the flow of current

C. Both of above

D. None of above

Correct Answer :

B. Because they can stop or allow the flow of current


Related Questions

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Software in computer

A. Enhances the capabilities of the hardware machine

B. Increase the speed of central processing unit

C. Both of above

D. None of above

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In _____ mode, the communication channel is used in both directions at the same time?

A. Full-duplex

B. Simplex

C. Half-duplex

D. None of the above

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Which programming language is based on Algol 60.

A. PILOT

B. SNOBOL

C. ADA

D. SIMULA

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What is the path from which data flow in a computer system is known as

A. Car

B. Bus

C. Truck

D. Road

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Which of the following is not an electronic computer?

A. ENIAC

B. ABC

C. UNIVAC

D. EDVAC

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Which of the following is intended to be used in all applications runs on mainframe computers.

A. LOGO

B. APL

C. PL/1

D. OCCAM

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How many numbers could ENIAC store in its internal memory

A. 100

B. 20

C. 80

D. 40

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Father of "C" programming language

A. Dennis Ritchie

B. Prof John Keenly

C. Thomas Kurtz

D. Bill Gates

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Most of the first generation computers were

A. Special purpose computers

B. General purpose computers

C. Both of above

D. None of above

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Which is a semi conductor memory?

A. Dynamic

B. Static

C. Bubble

D. Both a & b

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An application suitable for sequential processing is

A. Processing of grades

B. Payroll processing

C. Both a and b

D. All of above

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4

The first computer introduced in Nepal was

A. IBM 1400

B. IBM 1401

C. IBM 1402

D. IBM1402

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IBM 1401 is the first computer to enter in Nepal. It belonged to

A. First Generation

B. Second Generation

C. Third Generation

D. Froth Generation

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To move a copy of file from one computer to another over a communication channel is called?

A. File transfer

B. File encryption

C. File modification

D. File copying

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The first firm to mass-market a microcomputer as a personal computer was

A. IBM

B. Super UNIVAC

C. Radio Sharks

D. Data General Corporation

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Which of the following is the most quickly accessible storage?

A. RAM

B. Registers

C. Disks

D. Pen Drive

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Which of the following is the first computer to use Stored Program Concept?

A. UNIVAC

B. ENIAC

C. EDSAC

D. None of above

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Which one of the following is NOT a computer language

A. MS-Excel

B. BASIC

C. COBOL

D. C++

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CD-ROM stands for

A. Compactable Read Only Memory

B. Compact Data Read Only Memory

C. Compactable Disk Read Only Memory

D. Compact Disk Read Only Memory

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Which operation is not performed by computer

A. Inputting

B. Processing

C. Controlling

D. Understanding

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Primary memory stores

A. Data alone

B. Programs alone

C. Results alone

D. All of these

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Which electronic component was made out of semiconductor material?

A. Vacuum tubes

B. Transistors

C. ICs

D. All of above

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To prevent the loss of data during power failures, use a(n):

A. Encryption program.

B. Surge protector.

C. Firewall.

D. UPS.

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4

Which is not a comptuer of first generation?

A. ENIAC

B. UNIVAC

C. IBM 360

D. IBM 1401

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The two kinds of main memory are:

A. Primary and secondary

B. Random and sequential

C. ROM and RAM

D. All of above

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The magnetic storage chip used to provide non-volatile direct access storage of data and that have no moving parts are known as

A. Magnetic core memory

B. Magnetic tape memory

C. Magnetic disk memory

D. Magnetic bubble memory

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MICR stands for

A. Magnetic Ink Character Reader

B. Magnetic Ink Code Reader

C. Magnetic Ink Cases Reader

D. None

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What is meant by a dedicated computer?

A. Which is used by one person only

B. Which is assigned one and only one task

C. Which uses one kind of software

D. Which is meant for application software

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How many address lines are needed to address each machine location in a 2048 x 4 memory chip?

A. 10

B. 11

C. 8

D. 12

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When was the first electro-mechanical computer developed?

A. 1880

B. 1990

C. 1944

D. None of above