This set of Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on “Hybrid Architecture -RISC and CISC Convergence, Advantages of RISC, Design Issues of RISC Processors -1”.
1. The disadvantage of CISC design processors is
a) low burden on compiler developers
b) wide availability of existing software
c) complex in nature
d) none
View Answer
Explanation: Some computers are used in preference to CISC design due to its low burden on compiler developers and wide availability of existing software. But they are complex in nature.
2. The RISC architecture is preferred to CISC because RISC architecture has
a) simplicity
b) efficiency
c) high speed
d) all of the mentioned
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Explanation: The RISC architecture is preferred to CISC because RISC architecture is simple, highly efficient and the processors using RISC architecture have high speed.
3. The feature of RISC that is not present in CISC is
a) branch prediction
b) pipelining
c) branch prediction and pipelining
d) none
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Explanation: A RISC core allows performance enhancing features, such as branch prediction and pipelining. Traditionally, these have only been possible in RISC designs.
4. The feature of hybrid CISC-RISC architecture is
a) consume a lot of power
b) not applicable to mobile applications
c) processed by RISC core
d) all of the mentioned
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Explanation: The CISC-RISC hybrids continue to consume a lot of power and are not best candidates for mobile and embedded applications.
5. Which of the following is an application of RISC architecture by adding more instructions?
a) multimedia applications
b) telecommunication encoding
c) image conversion
d) all of the mentioned
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Explanation: By adding more instructions to the RISC architecture, some applications can be run much faster like multimedia applications, telecommunication encoding/decoding, image conversion and video processing.
6. Which of the following processor belongs to hybrid RISC-CISC architecture?
a) Intel Pentium III
b) Intel Itanium 64
c) AMD’s X86-64
d) All of the mentioned
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Explanation: The processors, Intel Pentium III, Intel Itanium 64 and AMD’s X86-64 consists of hybrid RISC-CISC architecture.
7. In order to implement complex instructions, CISC architectures use
a) macroprogramming
b) hardwire
c) microprogramming
d) none
View Answer
Explanation: In order to implement complex instructions, CISC architectures use microprogramming.
8. The advantage of RISC processors is
a) can operate at high clock frequency
b) shorter design cycle
c) simple and fast
d) all of the mentioned
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Explanation: The advantages of RISC processors are that they can work at high clock frequency, can be designed, developed and tested more quickly with a high speed.
9. The additional functionality that can be placed on the same chip of RISC is
a) Memory management units
b) Floating point units
c) Memory management and floating point arithmetic units
d) RAM, ROM
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Explanation: Several extra functionalities, such as memory management units or floating point arithmetic units, can also be placed on the same chip of RISC.
10. The number of clockcycles that take to wait until the length of the instruction is known in order to start decoding is
a) 0
b) 1
c) 2
d) 3
View Answer
Explanation: The loading and decoding the instructions in a RISC processor is simple and fast. It is not needed to wait until the length of the instruction is known in order to start the decoding.
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