Digital Electronics

Question 1

Who invented the first adding machine?

Answer 1

Blaise Pascal

Question 2

Who developed a loom in 1801 using a punched card that caused patterns and pictures to be woven into fabric?

Answer 2

Joseph Marie Jacquard

Question 3

Who was the English mathematician who developed the IDEA of a mechanical/digital computer?

Answer 3

Charles Babbage

Question 4

____ published the book “The Laws of Thought” in 1854, which was the first systematic treatment of the use of logic, later being used to create a special branch of mathematics.

Answer 4

George Boole

Question 5

____ created the first analog computer.

Answer 5

Vannevar Bush

Question 6

The Mark 1 was the first electrical/mechanical

computer, created at Harvard by ____.

Answer 6

Howard Aiken

Question 7

The first ELECTRONIC computer (using vacuum tubes) was created at the University of Pennsylvania in 1946 and was named the ____.

Answer 7

ENIAC

Electronic Numerical Integrator and Computer

Question 8

The first commercially available computer was the ____, available in 1951.

Answer 8

UNIVAC 1

Question 9

The transistor was developed by ____ in 1947.

Answer 9

Bell Laboratories

Question 10

Why are transistors better than vacuum tubes?

Answer 10

1. ) Less heat
2. ) Less power
3. ) Not as susceptible to damage (physical and electrical)
4. ) More reliable

Question 11

The ____ was developed in the 1960’s and is basically multiple transistors on a single chip.

Answer 11

IC (Integrated Circuit)

Question 12

T/F: The TTL chip was widely adopted because of its low cost and redundancy.

Answer 12

True

Question 13

T/F: Only several thousand transistors can be packaged on a single chip today.

Answer 13

False, millions.

Question 14

The first PC was created in the 19__’s.

Answer 14

1980’s

Question 15

The two categories of electronics studies are ____ and ____.

Answer 15

Analog and Digital

Question 16

A ___ is a binary value of either 0 or 1

Answer 16

Bit

Question 17

A ____ is a group of 8 bits.

Answer 17

Byte

Question 18

Early DOS limited the main memory of a computer to only ___ kb.

Answer 18

640

Question 19

____ allows all storage locations to be equally accessible.

Answer 19

Random Access Memory.

Question 20

Hard Drives and Floppy discs are examples of ____ - Memory.

Answer 20

Auxiliary

Question 21

What does BIOS stand for?

Answer 21

(Basic Input Output System)

Question 22

Where is the BIOS located?

Answer 22

In the ROM (Read Only Memory)

Question 23

T/F: Hard Discs last forever.

Answer 23

False, they will fail eventually.

Question 24

The ____ memory helps compensate for the difference between the processor and the main memory.

Answer 24

Cache

Question 25

____ memory is when auxiliary memory is used as part of the main memory.

Answer 25

Virtual

Question 26

T/F: The component containing the Control Unit and the Processor is called the CPU.

Answer 26

True

Question 27

T/F: Operations in Boolean algebra are grouped in brackets, parentheses, and braces.

Answer 27

True

Question 28

The collector and base signals of a(n) ____ are 180 degrees out of phase

Answer 28

Inverter

Question 29

A ____ amplifies the logic circuit power without inverting it.

Answer 29

Buffer

Question 30

The maximum amount of logic circuit inputs that a single logic circuit can drive is a characteristic known as ____.

Answer 30

Fan-Out

Question 31

The standard TTL output current is __ mA.

Answer 31

16mA

Question 32

A diamond symbol on a buffer symbol indicates that it is a(n) ____-____ Buffer.

Answer 32

Open Collector

Question 33

A bubble symbol drawn on the output of a symbol indicates ____ logic.

Answer 33

NOT

Question 34

Buffer amplifiers can deliver up to __ mA at up to __ volts.

Answer 34

40mA at up to 30 volts.

Question 35

The ___ is the Voltage that is being switched.

Answer 35

VCC (Voltage Common Collector)

Question 36

What determines the voltage level of the VCC?

Answer 36

The voltage required by the load.

Question 37

T/F: Two inverters can be used to create a buffer.

Answer 37

True

Question 38

T/F: NOR gates are easier to manufacture than NAND gates.

Answer 38

False. NAND are easier.

Question 39

T/F: NAND logic can be used for many functions.

Answer 39

True (Universal Function)