Computer Architecture Set 3

Computer Science Engineering (CSE)

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This set of Computer Architecture Multiple Choice Questions & Answers (MCQs) focuses on Computer Architecture Set 3

Q1 | The addressing mode, where you directly specify the operand value is
  • immediate
  • direct
  • definite
  • relative
Answer: immediate
Explaination:
none.
Q2 |            addressing mode is most suitable to change the normal sequence of execution of instructions.
  • relative
  • indirect
  • index with offset
  • immediate
Answer: relative
Explaination:
the relative addressing mode is used for this since it directly updates the pc.
Q3 | Which method/s of representation of numbers occupies a large amount of memory than others?
  • sign-magnitude
  • 1’s complement
  • 2’s complement
  • 1’s & 2’s compliment
Answer: sign-magnitude
Explaination:
it takes more memory as one bit used up to store the sign.
Q4 | Which method of representation has two representations for ‘0’?
  • sign-magnitude
  • 1’s complement
  • 2’s complement
  • none of the mentioned
Answer: sign-magnitude
Explaination:
one is positive and one for negative.
Q5 | When we perform subtraction on -7 and 1 the answer in 2’s complement form is                     
  • 1010
  • 1110
  • 0110
  • 1000
Answer: 1000
Explaination:
first the 2’s complement is found and that is added to the number and the overflow is ignored.
Q6 | The processor keeps track of the results of its operations using flags called                   
  • conditional code flags
  • test output flags
  • type flags
  • none of the mentioned
Answer: conditional code flags
Explaination:
these flags are used to indicate if there is an overflow or carry or zero result occurrence.
Q7 | The register used to store the flags is called as                     
  • flag register
  • status register
  • test register
  • log register
Answer: status register
Explaination:
the status register stores the condition codes of the system.
Q8 | In some pipelined systems, a different instruction is used to add to numbers which can affect the flags upon
  • and gate
  • nand gate
  • nor gate
  • xor gate
Answer: xor gate
Explaination:
none.
Q9 | The most efficient method followed by computers to multiply two unsigned numbers is                 
  • booth algorithm
  • bit pair recording of multipliers
  • restoring algorithm
  • non restoring algorithm
Answer: bit pair recording of multipliers
Explaination:
none.
Q10 | For the addition of large integers, most of the systems make use of               
  • fast adders
  • full adders
  • carry look-ahead adders
  • none of the mentioned
Answer: carry look-ahead adders
Explaination:
in this method, the carries for each step are generated first.
Q11 | In a normal n-bit adder, to find out if an overflow as occurred we make use of
  • counter
  • flip flop
  • shift register
  • push down stack
Answer: shift register
Explaination:
the shift registers are used to store the multiplied answer.
Q12 | The smallest entity of memory is called                 
  • cell
  • block
  • instance
  • unit
Answer: cell
Explaination:
each data is made up of a number of units.
Q13 | The collection of the above mentioned entities where data is stored is called               
  • block
  • set
  • word
  • byte
Answer: word
Explaination:
each readable part of the data is called blocks.
Q14 | If a system is 64 bit machine, then the length of each word will be                 
  • 4 bytes
  • 8 bytes
  • 16 bytes
  • 12 bytes
Answer: 8 bytes
Explaination:
a 64 bit system means, that at a time 64 bit instruction can be executed.
Q15 | The type of memory assignment used in Intel processors is            
  • little endian
  • big endian
  • medium endian
  • none of the mentioned
Answer: little endian
Explaination:
the method of address allocation to data to be stored is called as memory assignment.
Q16 | When using the Big Endian assignment to store a number, the sign bit of the number is stored in            
  • the higher order byte of the word
  • the lower order byte of the word
  • can’t say
  • none of the mentioned
Answer: the higher order byte of the word
Explaination:
none.
Q17 | To get the physical address from the logical address generated by CPU we use
  • mar
  • mmu
  • overlays
  • tlb
Answer: mmu
Explaination:
memory management unit, is used to add the offset to the logical address generated by the cpu to get the physical address.
Q18 |            method is used to map logical addresses of variable length onto physical memory.
  • paging
  • overlays
  • segmentation
  • paging with segmentation
Answer: segmentation
Explaination:
segmentation is a process in which memory is divided into groups of variable length called segments.
Q19 | During the transfer of data between the processor and memory we use
  • cache
  • tlb
  • buffers
  • registers
Answer: registers
Explaination:
none.
Q20 | Physical memory is divided into sets of finite size called as               
  • frames
  • pages
  • blocks
  • vectors
Answer: frames
Explaination:
none.
Q21 | Add #%01011101,R1 , when this instruction is executed then                     
  • the binary addition between the operands takes place
  • the numerical value represented by the binary value is added to the value of r1
  • the addition doesn’t take place, whereas this is similar to a mov instruction
  • none of the mentioned
Answer: the binary addition between the operands takes place
Explaination:
this performs operations in binary mode directly.
Q22 | If we want to perform memory or arithmetic operations on data in Hexa- decimal mode then we use                      symbol before the operand.
  • ~
  • !
  • $
  • *
Answer: $
Explaination:
none.
Q23 | When generating physical addresses from a logical address the offset is stored in                       
  • translation look-aside buffer
  • relocation register
  • page table
  • shift register
Answer: relocation register
Explaination:
in the mmu the relocation register stores the offset address.
Q24 | The technique used to store programs larger than the memory is                           
  • overlays
  • extension registers
  • buffers
  • both extension registers and buffers
Answer: overlays
Explaination:
in this, only a part of the program getting executed is stored on the memory and later swapped in for the other part.
Q25 | The unit which acts as an intermediate agent between memory and backing store to reduce process time is                         
  • tlb’s
  • registers
  • page tables
  • cache
Answer: cache
Explaination:
the cache’s help in data transfers by storing most recently used memory pages.
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