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1. The devices that provide the means for a computer to communicate with the user or other computers are referred to as:A.CPUB.ALUC.I/OD.none of the aboveAnswer & Explanation
Answer: Option C
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2. The software used to drive microprocessor-based systems is called:A.assembly languageB.firmwareC.machine language codeD.BASIC interpreter instructionsAnswer & Explanation
Answer: Option A
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3. The circuits in the 8085A that provide the arithmetic and logic functions are called the:A.CPUB.ALUC.I/OD.none of the aboveAnswer & Explanation
Answer: Option B
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4. How many buses are connected as part of the 8085A microprocessor?A.2 B.3C.5 D.8Answer & Explanation
Answer: Option B
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5. The ________ ensures that only one IC is active at a time to avoid a bus conflict caused by two ICs writing different data to the same bus.A.control busB.control instructionsC.address decoderD.CPUAnswer & Explanation
Answer: Option C
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Microprocessor Fundamentals - True or False
6. How many bits are used in the data bus?A.7 B.8C.9 D.16Answer & Explanation
Answer: Option B
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7. The items that you can physically touch in a computer system are called:A.softwareB.firmwareC.hardwareD.none of the aboveAnswer & Explanation
Answer: Option C
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8. Single-bit indicators that may be set or cleared to show the results of logical or arithmetic operations are the:A.flags B.registersC.monitors D.decisionsAnswer & Explanation
Answer: Option A
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9. When referring to instruction words, a mnemonic is:A.a short abbreviation for the operand addressB.a short abbreviation for the operation to be performedC.a short abbreviation for the data word stored at the operand addressD.shorthand for machine languageAnswer & Explanation
Answer: Option B
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10. The technique of assigning a memory address to each I/O device in the computer system is called:A.
memory-mapped I/O
B.ported I/OC.dedicated I/OD.
wired I/O
Answer & Explanation
Answer: Option A
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11. When was the first 8-bit microprocessor introduced?A.1969 B.1974C.1979 D.1985Answer & Explanation
Answer: Option B
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12. What type of circuit is used at the interface point of an output port?A.
decoder
B.latchC.tristate bufferD.
none of the above
Answer & Explanation
Answer: Option B
Explanation:
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13. I/O mapped systems identify their input/output devices by giving them a(n) ________.A.
8-bit port number
B.16-bit port numberC.8-bit buffer numberD.
8-bit instruction
Answer & Explanation
Answer: Option A
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14. What type of circuit is used at the interface point of an input port?A.
decoder
B.latchC.tristate bufferD.
none of the above
Answer & Explanation
Answer: Option C
Explanation:
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15. The register in the 8085A that is used to keep track of the memory address of the next op-code to be run in the program is the:A.
stack pointer
B.program counterC.instruction pointerD.
accumulator
Answer & Explanation
Answer: Option B
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16. The control bus and memories share a bidirectional bus in a typical microprocessor system.A True B.False
.Answer & Explanation
Answer: Option B
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17. All computer programs for a machine are called:A.
software
B.firmwareC.hardwareD.
none of the above
Answer & Explanation
Answer: Option A
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18. The 8085A is a(n):A.
16-bit parallel CPU
B.8-bit serial CPUC.8-bit parallel CPUD.
none of the above
Answer & Explanation
Answer: Option C
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19. Because microprocessor CPUs do not understand mnemonics as they
are, they have to be converted to ________.A.
hexadecimal machine code
B.binary machine codeC.assembly languageD.
all of the above
Answer & Explanation
Answer: Option B
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20. A register in the microprocessor that keeps track of the answer or results of any arithmetic or logic operation is the:A.
stack pointer
B.program counterC.instruction pointerD.
accumulator
Answer & Explanation
Answer: Option D
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21. What is the difference between a mnemonic code and machine code?A.
There is no difference.
B.Machine codes are in binary, mnemonic codes are in shorthand English.
C.Machine codes are in shorthand English, mnemonic codes are in binary.
Answer & Explanation
Answer: Option B
Explanation:
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22. Which bus is a bidirectional bus?A.
address bus
B.data busC.address bus and data busD.
none of the above
Answer & Explanation
Answer: Option B
Explanation:
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23. Which of the following buses is primarily used to carry signals that direct other ICs to find out what type of operation is being performed?A.
data bus
B.control busC.address busD.
address decoder bus
Answer & Explanation
Answer: Option B
Explanation:
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24. What kind of computer program is used to convert mnemonic code to machine code?A.
debug B.assembler
C.C++ D.FortranAnswer & Explanation
Answer: Option B
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25. Which of the following are the three basic sections of a microprocessor unit?A.
operand, register, and arithmetic/logic unit (ALU)
B.control and timing, register, and arithmetic/logic unit (ALU)C.control and timing, register, and memoryD.
arithmetic/logic unit (ALU), memory, and input/output
Answer & Explanation
Answer: Option B
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1. The stack is a data storage area in RAM used by certain microprocessor operations.A.True B.FalseAnswer & Explanation
Answer: Option A
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2. A microprocessor with the necessary support circuits will include at least two memory ICs: ROM or EPROM, and a RAM.A.True B.FalseAnswer & Explanation
Answer: Option A
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3. I/O-mapped systems identify their input and output devices by giving them an 8-bit port number.A.True B.FalseAnswer & Explanation
Answer: Option A
Explanation:
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4. A microcontroller integrates multichip systems with RAM, ROM, and I/O.
A.True B.FalseAnswer & Explanation
Answer: Option A
Explanation:
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5. Programs written for the 8080A must have slight modifications to run on the 8085A.A.True B.FalseAnswer & Explanation
Answer: Option B
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6. The software used to drive a microprocessor-based system is called FORTRAN.A.True B.FalseAnswer & Explanation
Answer: Option B
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7. Conversion from assembly language to machine language can be done by the programmer through a process called hand assembly.A.True B.FalseAnswer & Explanation
Answer: Option A
Explanation:
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8. Assembly language is written using mnemonics: MVI, DCR, JZ.A.True B.FalseAnswer & Explanation
Answer: Option A
Explanation:
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9. The 8085 software is compatible with the 8080A.A.True B.FalseAnswer & Explanation
Answer: Option A
Explanation:
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10. LDA addr and STA addr are Fortran language instructions stored in an external memory IC for a microprocessor.A.
True B.False
Answer & Explanation
Answer: Option B
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1. Which of the following is not a basic element within the microprocessor?A.MicrocontrollerB.Arithmetic logic unit (ALU)C.Register arrayD.Control unitAnswer & Explanation
Answer: Option A
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2. Which method bypasses the CPU for certain types of data transfer?A.Software interruptsB.Interrupt-driven I/OC.Polled I/OD.Direct memory access (DMA)Answer & Explanation
Answer: Option D
Explanation:
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3. Which of the following is not an enhancement to the Pentium that was unavailable in the 8086/8088?A."Pipelined" architectureB.Expansion of cache memoryC.Inclusion of an internal math coprocessorD.Data/address line multiplexingAnswer & Explanation
Answer: Option D
Explanation:
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4. Which bus is bidirectional?A.Address busB.Control busC.Data busD.None of the aboveAnswer & Explanation
Answer: Option C
Explanation:
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5. DMA is particularly suited for data transfer between the ________.A.disk drive and CPUB.disk drive and RAMC.disk drive and ROMD.disk drive and I/OAnswer & Explanation
Answer: Option B
Explanation:
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6. The first microprocessor had a(n)________.A.1-bit data busB.2-bit data busC.4-bit data busD.8-bit data busAnswer & Explanation
Answer: Option C
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7. Which microprocessor has multiplexed data and address lines?A.8086/8088 B.80286C.80386 D.PentiumAnswer & Explanation
Answer: Option A
Explanation:
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8. Which is not an operand?A.VariableB.RegisterC.Memory locationD.AssemblerAnswer & Explanation
Answer: Option D
Explanation:
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9. Which is not part of the execution unit (EU)?A.Arithmetic logic unit (ALU)B.ClockC.General registersD.FlagsAnswer & Explanation
Answer: Option B
Explanation:
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10. A 20-bit address bus can locate ________.A.
1,048,576 locations
B.2,097,152 locationsC.4,194,304 locationsD.
8,388,608 locations
Answer & Explanation
Answer: Option A
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11. What is occurring when two or more sources of data attempt to use the same bus?A.
Bus contention
B.Direct memory accessC.Bus interruptionD.
PPI
Answer & Explanation
Answer: Option A
Explanation:
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12. Which of the following is not a jump instruction?A.
JB (jump back)
B.JA (jump above)C.JO (jump if overflow)D.
JMP (unconditional jump)
Answer & Explanation
Answer: Option A
Explanation:
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13. Which of the following was not a design improvement for the 8086/8088 over the 8085?A.
Execution unit (EU)
B.16-bit data busC.Arithmetic logic unit (ALU)D Bus interface unit (BIU)
.Answer & Explanation
Answer: Option C
Explanation:
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14. Polled I/O works best when ________.A.
there are no priority considerations
B.priority considerations are frequentC.the polling rate exceeds 1000 sD.
the polling rate is below 1000 s
Answer & Explanation
Answer: Option A
Explanation:
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15. Which of the following is not an arithmetic instruction?A.
INC (increment)
B.CMP (compare)C.DEC (decrement)D.
ROL (rotate left)
Answer & Explanation
Answer: Option D
Explanation:
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16. During a read operation the CPU fetches ________.A.
a program instruction
B.another addressC.data itselfD.
all of the above
Answer & Explanation
Answer: Option D
Explanation:
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17. The first Intel microprocessor to contain on-board cache memory was the ________.A.
80386
B.80486C.PentiumD.
Pentium Pro
Answer & Explanation
Answer: Option B
Explanation:
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18. Which of the following is not an 8086/8088 general-purpose register?A.
Code segment (CS)
B.Data segment (DS)C.Stack segment (SS)D.
Address segment (AS)
Answer & Explanation
Answer: Option D
Explanation:
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19. Which of the following is not a computer bus?A.
Data bus
B.Control busC.Timer busD.
Address bus
Answer & Explanation
Answer: Option C
Explanation:
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20. With interrupt-driven I/O, if two or more devices request service at the same time, ________.A.
the device closest to the CPU gets priority
B.the device that is fastest gets priorityC.the device assigned the highest priority is serviced firstD.
the system is likely to crash
Answer & Explanation
Answer: Option C
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21. The Pentium can address ________.A.
1 MB
B.1 GBC.2 GBD.
4 GB
Answer & Explanation
Answer: Option D
Explanation:
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22. A port can be ________.A.
strictly for input
B.strictly for outputC.bidirectionalD.
all of the above
Answer & Explanation
Answer: Option D
Explanation:
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23. Which of the following is not a computer functional block?A.
Analog-to-digital converter
B.Central-processing unitC.MemoryD.
Input/output ports
Answer & Explanation
Answer: Option A
Explanation:
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24. The Pentium microprocessor has a data bus of ________.A.
16 bits
B.32 bitsC.64 bitsD.
128 bits
Answer & Explanation
Answer: Option C
Explanation:
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25. The process of jointly establishing communication is called ________.A.
DMA
B.bidirectional addressingC.multiplexingD.
handshaking
Answer & Explanation
Answer: Option D
Explanation:
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1. A mnemonic is an English-like instruction that is converted by an assembler into a machine code for use by a processor.A.
True B.False
Answer & Explanation
Answer: Option A
Explanation:
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2. Chip designers are always trying to increase the clock speed.A.
True B.False
Answer & Explanation
Answer: Option A
Explanation:
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3. Instructions for the 80X86 family are downward compatible.A.
True B.False
Answer & Explanation
Answer: Option B
Explanation:
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4. The Pentium can execute two instructions at once.A.
True B.False
Answer & Explanation
Answer: Option A
Explanation:
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5. A coprocessor is a microprocessor designed with a limited instruction set optimized to perform arithmetic operations very quickly.A.
True B.False
Answer & Explanation
Answer: Option A
Explanation:
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6. The original Pentium was the first CPU to feature separate data and instruction caches.A.
True B.False
Answer & Explanation
Answer: Option A
Explanation:
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7. Machine language is independent of the type of microprocessor in a computer system.A.
True B.False
Answer & Explanation
Answer: Option B
Explanation:
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8. The PCI bus is a good example of an external bus for personal computers.A True B.False
.Answer & Explanation
Answer: Option A
Explanation:
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9. The Power PC can effectively execute up to ten instructions per clock cycle.A.
True B.False
Answer & Explanation
Answer: Option B
Explanation:
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10. Polling is the process of pausing the normal sequence of instructions to cause the processor to execute a separate set of I/O instructions instead.A.
True B.False
Answer & Explanation
Answer: Option B
Explanation:
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1. The AND, OR, and TEST instructions are all part of which type of instruction?A.
Data transfer
B.ArithmeticC.Bit manipulationD.
Loops and jumps
Answer & Explanation
Answer: Option C
Explanation:
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2. A mini-program that can be used repeatedly, but is programmed only once is called a(n) ________.A.
string
B.subroutineC.interruptD.
processor control
Answer & Explanation
Answer: Option B
Explanation:
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3. Contiguous sequences of bytes or words are called ________.A.
data transfer
B.arithmeticC.loops and jumpsD.
strings
Answer & Explanation
Answer: Option D
Explanation:
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4. An interrupt method that requires the CPU to test each peripheral device in sequence is called ________.A.
vectored I/O
B.polled I/OC.programmed interruptD.
interrupt-driven I/O
Answer & Explanation
Answer: Option B
Explanation:
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5. An example of a unidirectional bus in a microcomputer system is the ________.A.
address bus
B.data busC.control busD.
all of the above
Answer & Explanation
Answer: Option A
Explanation:
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6. The ADD, CMP, and MUL instructions are all part of which type of instruction?A.
Data transfer
B.ArithmeticC.Bit manipulationD.
Loops and jumps
Answer & Explanation
Answer: Option B
Explanation:
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7. Instructions that allow direct control of the processor's flags are called ________ instructions.A.
data transfer
B.arithmeticC.bit manipulationD.
processor control
Answer & Explanation
Answer: Option D
Explanation:
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8. The MOV, PUSH, and POP instructions are all part of which type of instruction?A.
Data transfer
B.ArithmeticC.Bit manipulationD Loops and jumps
.Answer & Explanation
Answer: Option A
Explanation:
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9. The JNZ, JA, and LOOP instructions are all part of which type of instruction?A.
Data transfer
B.ArithmeticC.Bit manipulationD.
Loops and jumps
Answer & Explanation
Answer: Option D
Explanation:
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10. During a memory read operation, the CPU fetches ________.A.
a program instruction
B.an addressC.dataD.
all of the above
Answer & Explanation
Answer: Option D
Explanation:
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