FCA2 ADVANCEMENT LOGIC CIRCUITS CH 1,3

What term is defined as a number to be added to a preceding number? 1. Addend 2. Augend 3. Carry 4. Sum

1. Addend

What is the output of an exclusive NOR gate when (a) all inputs are LOW and (b) all inputs are HIGH? 1. HIGH (b) HIGH 2. LOW (b) HIGH 3. HIGH (b) LOW 4. LOW (b) LOW

1. HIGH (b) HIGH

Using positional notation, what two factors determine the value of a number? 1. Symbol and position 2. Position and base 3. Radix and symbol 4. Unit and symbol

1. Symbol and position

Which, if any, of the following is a difference between subtracting octal numbers and subtracting decimal numbers? 1. The amount of the borrow 2. The octal minuend is converted to decimal 3. The octal subtrahend is converted to decimal 4. None; there is no difference

1. The amount of the borrow

Which of the following statements is correct concerning D flip-flops? 1. The output is delayed up to one clock pulse 2. Input data is delayed until it coincides with the clock 3. The clock is delayed until it coincides with the input data 4. The output is always a square wave

1. The output is delayed up to one clock pulse

An inverter on the clock input has which of the following effects on the D flip flop? 1. The output will change on the negative-going transition of the clock pulse 2. The output will change on the positive-going transition of the clock pulse 3. The data input will change at the clock frequency 4. The output will change at the clock frequency

1. The output will change on the negative-going transition of the clock pulse

What is the purpose of an inverter? 1. To change logic polarity 2. To change voltage levels 3. To amplify the input 4. To complement the input

1. To change logic polarity

A T flip-flop is used primarily for which of the following functions? 1. To divide the input frequency by two 2. To double the input frequency 3. To amplify the input frequency 4. To invert the input frequency

1. To divide the input frequency by two

Logic is the development of a reasonable conclusion based on known information. 1. True 2. False

1. True

A chart that lists all possible input combinations and resultant output is called a 1. Truth Table 2. Decision Table 3. logic symbol listing 4. polarity magnitude listing

1. Truth Table

What term describes a single object in a modern number system? 1. Unit 2. Base 3. Digit 4. Number

1. Unit

Modern number systems are built around which of the following components? 1. Unit, number, and radix 2. Number, base, and radix 3. Position, power, and unit 4. Digit, power, and position

1. Unit, number, and radix

The circuit which generates a timing signal to control operations is called a/an 1. clock 2. counter 3. oscillator 4. bistable multivibrator

1. clock

What are the (a) radix and (b) the symbols used in the binary number system? 1. (a) 1 (b) 0, 1 2. (a) 2 (b) 1, 0 3. (a) 3 (b) 0, 1, 2 4. (a) 0 (b) 1, 2

2. (a) 2 (b) 1, 0

What is the largest sum that can be obtained from a half adder? 1. 01(subscript)2 2. 10(subscript)2 3. 11(subscript)2 4. 100(subscript)2

2. 10(subscript)2

What is the sum of 4(subscript)8 and 4(subscript)8? 1. 10(subscript)10 2. 10(subscript)8 3. 7(subscript)8 4. 16(subscript)8

2. 10(subscript)8

Which of the following is NOT a valid octal number? 1. 604(subscript)8 2. 591(subscript)8 3. 743(subscript)8 4. 477(subscript)8

2. 591(subscript)8

What is the modulus of a 3-stage binary counter? 1. 7 2. 8 3. 3 4. 4

2. 8

Which of the following statements describes parallel transfer? 1. Data is transferred one bit at a time 2. All data bits are transferred simultaneously 3. Data is received in serial form and transferred in parallel form 4. Data is transferred on a single line

2. All data bits are transferred simultaneously

Which of the following statements is true concerning CLR and PR pulses to the D flip-flop? 1. CLR causes Q to go high, PR causes Q to go low 2. CLR and PR override any existing output condition 3. Other inputs override CLR and PR 4. CLR and PR have no effect on the output

2. CLR and PR override any existing output condition

What term describes the number of symbols used in a number system? 1. Power 2. Radix 3. Exponent 4. Subscript

2. Radix

Flip-flops may NOT be used for which of the following operations? 1. Temporary storage 2. Subtraction 3. Division 4. Transfer of information

2. Subtraction

Which digit is the MSD in the binary number 1011001? 1. The 0 farthest to the left 2. The 1 farthest to the left 3. The 0 farthest to the right 4. The 1 farthest to the right

2. The 1 farthest to the left

Logic families are identified by which of the following means? 1. Logic polarity required 2. The types of elements used 3. Size and cost of manufacture 4. Packaging (DIP, TO, flat packs)

2. The types of elements used

The output of a NOR gate will be HIGH under which of the following conditions? 1. When all inputs are HIGH 2. When all inputs are LOW 3. When one input is HIGH 4. When one input is LOW

2. When all inputs are LOW

The power of a number is indicated by the 1. subscript 2. exponent 3. radical 4. radix

2. exponent

Which of the following symbols represents the operation function of an exclusive OR gate? 1. Θ 2. ⊕ 3. Ο 4. ⊗

2. ⊕

A number system uses the symbols 0 through 4. What is its base? 1. 6 2. 5 3. 3 4. 4

3. 3

Which of the following logic gates requires all inputs to be TRUE at the same time to produce a TRUE output? 1. OR 2. NOT 3. AND 4. NAND

3. AND

Which of the following output Boolean expressions is/are correct for an AND gate? 1. f = AB 2. f = A·B 3. Both 1 and 2 above 4. A=B

3. Both 1 and 2 above

Subtraction is accomplished by which of the following methods in a computer that can only add? 1. Binary subtraction 2. Decimal complement 3. Complementary subtraction 4. Minuend complement

3. Complementary subtraction

What are the inputs to a D flip-flop? 1. Set and reset 2. Set and clock 3. Data and clock 4. Reset and data

3. Data and clock

Which of the following gates produces a HIGH output when any or all of the inputs are LOW? 1. AND 2. OR 3. NAND 4. NOR

3. NAND

What type of logic gate is modified to produce an exclusive OR gate? 1. AND 2. NAND 3. OR 4. NOR

3. OR

Which of the following types of circuits will produce a stable clock when triggered by an outside source? 1. R-S flip-flop 2. Bistable multivibrator 3. One-shot multivibrator 4. D flip-flop

3. One-shot multivibrator

What term identifies a series of FFs designed to temporarily store information? 1. Data word 2. Counter 3. Register 4. DIP package

3. Register

Which of the following statements is true regarding astable multivibrators used as clocks? 1. As multivibrator frequency increases, stability decreases 2. Output 2 will have a higher voltage than output 1 3. The frequency stability may be increased by applying a higher frequency trigger 4. A trigger of lower frequency will stabilize the output frequency

3. The frequency stability may be increased by applying a higher frequency trigger

One octal digit is represented by how many binary digits? 1. One 2. Two 3. Three 4. Four

3. Three

What is the purpose of a D flip-flop? 1. To eliminate the output of the equipment 2. To divide the data input by the clock frequency 3. To store data until it is needed 4. To toggle the data input

3. To store data until it is needed

A TTL logic circuit would use which of the following types of elements? 1. Diode-transistor 2. Resistor-transistor 3. Transistor-transistor 4. Complementary metal oxide semiconductors

3. Transistor-transistor

Which of the following rules of binary subtraction requires the use of a borrow? 1. 0 - 0 2. 1 - 0 3. 1 - 1 4. 0 - 1

4. 0 - 1

What is the sum of 77(subscript)8 and 3(subscript)8? 1. 127(subscript)8 2. 80(subscript)8 3. 100(subscript)8 4. 102(subscript)8

4. 102(subscript)8

What is the decimal value of 8(exponent)3? 1. 64(subscript)10 2. 128(subscript)10 3. 256(subscript)10 4. 512(subscript)10

4. 512(subscript)10

What is the radix of the octal number system? 1. 10 (subscript)10 2. 0 to 7 3. 8 4. 7 (subscript) 8

4. 7 (subscript) 8

Which of the following statements describes a toggle flip-flop? 1. A monostable device 2. An astable device that changes state only on a set pulse 3. A two input bistable device 4. A bistable device with a single input

4. A bistable device with a single input

Which of the following statements describes the difference between a half adder and a full adder? 1. A half adder produces a carry 2. A full adder produces a carry 3. A half adder will add a carry from another circuit 4. A full adder will add a carry from another circuit

4. A full adder will add a carry from another circuit

What is a number? 1. A quantity of objects 2. A counting system based on symbols 3. The decimal system 4. A symbol representing a unit or a quantity

4. A symbol representing a unit or a quantity

Flip-flops are what type of multivibrators? 1. Astable 2. Monostable 3. Free running 4. Bistable

4. Bistable

Counters may be used for which of the following purposes? 1. Counting operations, quantities and time 2. Dividing frequency 3. Addressing information in storage 4. Each of the above

4. Each of the above

Which of the following types of clocks would probably be used in a complex piece of equipment with a variety of timing requirements? 1. Single triggered-monostable 2. Single free-running 3. Triggered-astable for each section of the equipment 4. Multiphase

4. Multiphase

In subtraction, the (a) is subtracted from the (b). 1. (a) Minuend (b) subtrahend 2. (a) Remainder (b) subtrahend 3. (a) Subtrahend (b) difference 4. (a) Subtrahend (b) minuend

Subtrahend (b) minuend