Computer Architecture Set 17

Computer Science Engineering (CSE)

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This set of Computer Architecture Multiple Choice Questions & Answers (MCQs) focuses on Computer Architecture Set 17

Q1 | The LEA mnemonic is used to
  • load the effective address of an instruction
  • load the values of operands onto an accumulator
  • declare the values as global constants
  • store the outcome of the operation at a memory location
Answer: load the effective address of an instruction
Explaination:
the effective address is the address of the memory location required for the execution of the instruction.
Q2 | The instructions of IA-32 machines are of length up to               
  • 4 bytes
  • 8 bytes
  • 16 bytes
  • 12 bytes
Answer: 12 bytes
Explaination:
the size of instruction that can be executed at once.
Q3 | The bit present in the op code, indicating which of the operands is the source is called as                   
  • src bit
  • indirection bit
  • direction bit
  • frm bit
Answer: direction bit
Explaination:
none.
Q4 | The instruction used to cause unconditional jump is                   
  • ujg
  • jg
  • jmp
  • goto
Answer: jmp
Explaination:
this statement causes a jump from one instruction to another without the condition.
Q5 |                       instruction is used to check the bit of the condition flags.
  • test
  • tb
  • check
  • bt
Answer: bt
Explaination:
this is used to check the condition flags for exceptions.
Q6 | .data directive is used                     
  • to indicate the ending of the data section
  • to indicate the beginning of the data section
  • to declare all the source operands
  • to initialize the operands
Answer: to indicate the beginning of the data section
Explaination:
this is used to indicate the starting of the section of data.
Q7 | The instruction used to multiply operands yielding a double integer outcome is                     
  • mul
  • imul
  • dmul
  • emul
Answer: imul
Explaination:
this instruction is used to carry out multiplication on large integral values.
Q8 | SIMD stands for                       
  • single instruction multiple data
  • simple instruction multiple decoding
  • sequential instruction multiple decoding
  • system information mutable data
Answer: single instruction multiple data
Explaination:
this is the instruction used to perform an operation on multiple types of data.
Q9 | In case of multimedia extension instructions, the pixels are encoded into a data item of                     
  • 16 bit
  • 32 bit
  • 24 bit
  • 8 bit
Answer: 8 bit
Explaination:
none.
Q10 | The MMX (Multimedia Extension) operands are stored in                       
  • general purpose registers
  • banked registers
  • float point registers
  • graphic registers
Answer: float point registers
Explaination:
these operands are used for graphic related operations.
Q11 | The division operation in IA-32 is a single operand instruction so it is assumed that                         
  • the divisor is stored in the eax register
  • the dividend is stored in the eac register
  • the divisor is stored in the accumulator
  • the dividend is stored in the accumulator
Answer: the divisor is stored in the eax register
Explaination:
in the case of a division
Q12 | Any condition that causes a processor to stall is called as                     
  • hazard
  • page fault
  • system error
  • none of the mentioned
Answer: hazard
Explaination:
an hazard causes a delay in the execution process of the processor.
Q13 | The stalling of the processor due to the unavailability of the instructions is called as                         
  • control hazard
  • structural hazard
  • input hazard
  • none of the mentioned
Answer: control hazard
Explaination:
the control hazard also called as instruction hazard is usually caused by a cache miss.
Q14 | The contention for the usage of a hardware device is called               
  • structural hazard
  • stalk
  • deadlock
  • none of the mentioned
Answer: structural hazard
Explaination:
the processor contends for the usage of the hardware and might enter into a deadlock state.
Q15 | The pipeline bubbling is a method used to prevent data hazard and structural hazards.
  • true
  • false
Answer: true
Explaination:
the periods of time when the unit is idle is called a bubble.
Q16 |                           method is used in centralized systems to perform out of order execution.
  • scorecard
  • score boarding
  • optimizing
  • redundancy
Answer: score boarding
Explaination:
in a scoreboard, the data dependencies of every instruction are logged. instructions are released only when the scoreboard determines that there are no conflicts with previously issued and incomplete instructions.
Q17 | The algorithm followed in most of the systems to perform out of order execution is                       
  • tomasulo algorithm
  • score carding
  • reader-writer algorithm
  • none of the mentioned
Answer: tomasulo algorithm
Explaination:
the tomasulo algorithm is a hardware algorithm developed in 1967 by robert tomasulo from ibm. it allows sequential instructions that would normally be stalled due to certain dependencies to execute non- sequentially (out-of-order execution).
Q18 | The problem where process concurrency becomes an issue is called as                         
  • philosophers problem
  • bakery problem
  • bankers problem
  • reader-writer problem
Answer: reader-writer problem
Explaination:
none.
Q19 | The set of loosely connected computers are called as                       
  • lan
  • wan
  • workstation
  • cluster
Answer: cluster
Explaination:
in a computer cluster all the participating computers work together on a particular task.
Q20 | Each computer in a cluster is connected using                       
  • utp
  • rj-45
  • stp
  • coaxial cable
Answer: rj-45
Explaination:
the computers are connected to each other using a lan connector cable.
Q21 | The computer cluster architecture emerged as a result of                     
  • isa
  • workstation
  • super computers
  • distributed systems
Answer: distributed systems
Explaination:
a distributed system is a computer system spread out over a geographic area.
Q22 | The software which governs the group of computers is                       
  • driver rd45
  • interface ui
  • clustering middleware
  • distributor
Answer: clustering middleware
Explaination:
the software helps to
Q23 | The cluster formation in which the work is divided equally among the systems is               
  • load-configuration
  • load-division
  • light head
  • both load-configuration and load- division
Answer: load-configuration
Explaination:
this approach the work gets divided among the systems equally.
Q24 | In the client server model of the cluster                     approach is used.
  • load configuration
  • fifo
  • bankers algorithm
  • round robin
Answer: round robin
Explaination:
by using this approach the performance of the cluster can be enhanced.
Q25 | The most common modes of communication in clusters are               
  • message queues
  • message passing interface
  • pvm
  • both message passing interface and pvm
Answer: both message passing interface and pvm
Explaination:
none.
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