Computer System Overview Questions and Answers for Competitive Exams

Computer System Overview Questions and Answers:

Q.41 If a microcomputer operates at 5 MHz with an 8 bit bus and a newer version operates at 20 MHz with a 32 bit bus, the maximum speed up possible approximately will be……

(A) 2

(B) 4

(C) 6

(D) 16

Q.42 Index register in a microprocessor is used for….

(A) indirect addressing

(B) pointing to the stack address

(C) address modification

(D) keeping track of the number of time a loop is executed

Q.43 The sequence of events that happen during a typical operation.

(A) PC MAR memory MDR IR

(B) PC Memory MDR IR

(C) PC Memory IR

(D) PC MAR Memory IR

Q.44 A byte addressable computer has memory capacity of 2m bytes add confirm 2n operations. An instruction involving 3 operands and operator needs a maximum of….

(A) 3m hits

(B) 3m + n hits

(C) m + n hits

(D) none of these

Q.45 In the previous problem if the computer is word addressable with the word size being 8 bytes, then the answer will be……

(A) 3m hits

(B) 3m + n hits

(C) m + n hits

(D) none of these

Q.46 The addressing mode used in an instruction of the form ADD X, Y is….

(A) absolute

(B) immediate

(C) indirect

(D) index

Q.47 Which of the following units cannot be used to measure the speed of computer?

(A) MIPS

(B) MFLOPS

(C) FLOPS

(D) BAUD

Q.48 A set of related program is called.

(A) script

(B) arrays

(C) stacks

(D) package

Q.49 Program status word (PSW) contains various (different) status of….

(A) CPU

(B) ALU

(C) program

(D) registers

Q.50 Microprogramming is designing of….

(A) ALU

(B) CPU

(C) ROM

(D) Control Units

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