Computer System Overview Questions and Answers for Competitive Exams
Computer System Overview Questions and Answers:
Q.31 In a generic microprocessor, instruction cycle time is….
(A) shorter than machine cycle time
(B) larger than machine cycle time
(C) exactly double the machine cycle time
(D) exactly the same as the machine cycle time.
Ans . B
Q.32 What is the minimum number of operations required, for a microprocessor with 8 data pins, to read a 32-bit word?
(A) 1
(B) 2
(C) 4
(D) 8
Ans . C
Q.33 The flow and timing of data to and form the microprocessor is regulated by……
(A) control pins
(B) address pins
(C) data pins
(D) power pins
Ans . A
Q.34 What type of control pins are needed in a microprocessor to regulate traffic on the bus, in order to prevent two devices from trying to use it at the same time?
(A) Bus control
(B) Interrupts
(C) Bus arbitration
(D) Status
Ans . C
Q.35 A 32 bits microprocessor has the word length equal to…….
(A) 2 bytes
(B) 1 bytes
(C) 4 bytes
(D) 8 bytes
Ans . C
Q.36 A microprocessor with 12 address lines is capable of addressing……
(A) 1024 locations
(B) 2048 locations
(C) 4096 locations
(D) 64 k locations
Ans . C
Q,37 The stack pointer in the 8085 microprocessor is a…….
(A)16-bit register that point to stack memory locations.
(B) 16-bit accumulator
(C) memory location in the stack
(D) flag register used for the stack
Ans . A
Q.38 Which of the following statements is true about the Program Counter (PC) ?
(A) it is a cell in ROM
(B) It is a register
(C) During execution of the current instruction, its content changes.
(D) It counts the number of instructions executed in a program.
Ans . B
Q.39 Which of the following is not a register?
(A) buffer
(B) stack
(C) program counter
(D) accumulator
Ans . A
Q.40 The clock interrupt handle on a computer requires 2 msee per clock tick. The clock runs at 60 Hz. What percent of the CPU is devoted to the clock?
(A) 1.2
(B) 7.5
(C) 12
(D) 18.5
Ans . C
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