Computers

Q1: 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)

Q2: Which is not part of the execution unit (EU)?

A
Arithmetic logic unit (ALU)

B
Clock

C
General registers

D
Flags

Q3: Which of the following is not an enhancement to the Pentium that was unavailable in the 8086/8088?

A
"Pipelined" architecture

B
Expansion of cache memory

C
Inclusion of an internal math coprocessor

D
Data/address line multiplexing

Q4: During a read operation the CPU fetches ________.

A
a program instruction

B
another address

C
data itself

D
all of the above

Q5: Which of the following is not a computer functional block?

A
Analog-to-digital converter

B
Central-processing unit

C
Memory

D
Input/output ports

Q6: The process of jointly establishing communication is called ________.

A
DMA

B
bidirectional addressing

C
multiplexing

D
handshaking

Q7: Which microprocessor has multiplexed data and address lines?

A
8086/8088

B
80286

C
80386

D
Pentium

Q8: Polled I/O works best when ________.

A
there are no priority considerations

B
priority considerations are frequent

C
the polling rate exceeds 1000 s

D
the polling rate is below 1000 s

Q9: The first Intel microprocessor to contain on-board cache memory was the ________.

A
80386

B
80486

C
Pentium

D
Pentium Pro

Q10: The Pentium microprocessor has a data bus of ________.

A
16 bits

B
32 bits

C
64 bits

D
128 bits

Q11: The first microprocessor had a(n)________.

A
1-bit data bus

B
2-bit data bus

C
4-bit data bus

D
8-bit data bus

Q12: A port can be ________.

A
strictly for input

B
strictly for output

C
bidirectional

D
all of the above

Q13: Which is not an operand?

A
Variable

B
Register

C
Memory location

D
Assembler

Q14: Which of the following was not a design improvement for the 8086/8088 over the 8085?

A
Execution unit (EU)

B
16-bit data bus

C
Arithmetic logic unit (ALU)

D
Bus interface unit (BIU)

Q15: Which of the following is not a basic element within the microprocessor?

A
Microcontroller

B
Arithmetic logic unit (ALU)

C
Register array

D
Control unit

Q16: 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)

Q17: What is occurring when two or more sources of data attempt to use the same bus?

A
Bus contention

B
Direct memory access

C
Bus interruption

D
PPI

Q18: Which bus is bidirectional?

A
Address bus

B
Control bus

C
Data bus

D
None of the above

Q19: Which of the following is not a computer bus?

A
Data bus

B
Control bus

C
Timer bus

D
Address bus

Q20: DMA is particularly suited for data transfer between the ________.

A
disk drive and CPU

B
disk drive and RAM

C
disk drive and ROM

D
disk drive and I/O

Q21: 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 priority

C
the device assigned the highest priority is serviced first

D
the system is likely to crash

Q22: Which method bypasses the CPU for certain types of data transfer?

A
Software interrupts

B
Interrupt-driven I/O

C
Polled I/O

D
Direct memory access (DMA)

Q23: The first microprocessor had a(n)________.

A
1-bit data bus

B
2-bit data bus

C
4-bit data bus

D
8-bit data bus

Q24: A 20-bit address bus can locate ________.

A
1,048,576 locations

B
2,097,152 locations

C
4,194,304 locations

D
8,388,608 locations

Q25: The Pentium can address ________.

A
1 MB

B
1 GB

C
2 GB

D
4 GB

Q26: Which of the following is not an arithmetic instruction?

A
INC (increment)

B
CMP (compare)

C
DEC (decrement)

D
ROL (rotate left)


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