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ATT TEST 8 - QUESTIONS WITH ACCURATE SOLUTIONS
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ATT TEST 8 - QUESTIONS WITH ACCURATE SOLUTIONS
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ATT TEST 8 - QUESTIONS WITH ACCURATE SOLUTIONSWhen a feedback line is used in a logic (digital) circuit, it is called a _________
Right Ans - Sequential citcuit
What is a WORD? Right Ans - A complete piece of digital data
Flip flops store information by using what? Right Ans - Feedback from
output gates to input gates
What part of the clock pulse is used to level trigger a flip flop? Right Ans -
Low pulse width
What is the purpose of a register? Right Ans - To store and transfer data
How does the logic probe indicate a high signal? Right Ans - By a red led
Integrated circuits were made possible by the invention of what? Right Ans
- Semiconductor devices
What are 3 common features in all IC's? Right Ans - Pins, parts number, pin
indicator
Which IC family has the lowest power rating? Right Ans - CMOS
Which IC family has the fastest switching speed? Right Ans - ECL
Which IC family has the lowest power requirements? Right Ans - CMOS
Which IC family has input/output voltages of 0V-15V? Right Ans - CMOS
What is the advantage of TTL over ECL? Right Ans - Lower power
What is the purpose of a decimal encoder? Right Ans - Convert decimal
numbers to binary outputs
What circuit converts binary numbers to outputs that represent alphanumeric
characters? Right Ans - Binary decoder
, Why are ESDs so sensitive to static electricity? Right Ans - They normally
operate at very low current and voltage levels
What does a basic digital circuit look for? Right Ans - The presence or
absence of a signal
The presence of a signal is classified by: 5 volts/high/true/on. What is the
absence classified by? Right Ans - 0 volts/low/false/off
How are digital circuits classified? Right Ans - level of integration and by
function
How many gates does small scale integration have? (SSI) Right Ans - less
than 12 gates
How many gates does medium scale integration have? (MSI) Right Ans -
12-99 gates
How many gates does large scale integration have? (LSI) Right Ans - 100-
9,999 gates
How many gates does very large scale integration have? (VLSI) Right Ans -
10,000-99,999
How many gates does ultra large scale integration have? (ULSI) Right Ans -
100,000+ gates
What are the 3 basic functions of a buffer? Right Ans - Protection, driver,
switching
How many volts indicates a low? Right Ans - 0-.8
How many volts indicates a high? Right Ans - 2 or more
What is indicated by voltage between .8-2? Right Ans - a float
How are ICs classified? (SSI, MSI, LSI....) Right Ans - By the number of gates
What is not normally used as a wire deposit on the wafer? Right Ans - Iron
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