# Embedded Systems Questions and Answers – High Level Optimization

This set of Embedded Systems Multiple Choice Questions & Answers (MCQs) focuses on “High Level Optimization”.

1. What does FRIDGE stand for?
a) fixed-point programming design environment
b) floating-point programming design environment
c) fixed-point programming decoding
d) floating-point programming decoding
View Answer

Answer: a
Explanation: Certain tools are available which are developed for the optimization programmes and one such tool is the FRIDGE or fixed-point programming design environment, commercially made by Synopsys System Studio.

2. Which of the following tool can replace the floating point arithmetic to fixed point arithmetic?
a) SDS
b) FAT
c) VFAT
d) FRIDGE
View Answer

Answer: d
Explanation: There are certain tools available which are developed for the optimization programmes and one such tool is the FRIDGE or fixed-point programming design environment, commercially made available by Synopsys System Studio. This tool can is used in the transformation program, that is the conversion of floating point arithmetic to the fixed point arithmetic. This is widely used in signal processing.

3. Which programming algorithm is used in the starting process of the FRIDGE?
a) C++
b) JAVA
c) C
d) BASIC
View Answer

Answer: c
Explanation: The FRIDGE tool uses C programming algorithm in the initial stage and is converted to a fixed-C algorithm which extends C by two extends.
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4. In which loop transformation, a single loop is split into two?
a) loop tiling
b) loop fusion
c) loop permutation
d) loop unrolling
View Answer

Answer: b
Explanation: Many loop transformation are done for the optimization of the program and one such loop transformation is the loop fusion in which a single loop is split and the loop fission includes the merging of the two separate loops.

5. Which loop transformations have several instances of the loop body?
a) loop fusion
b) loop unrolling
c) loop fission
d) loop tiling
View Answer

Answer: b
Explanation: The loop unrolling is a standard transformation which creates several instances of the loop body and the number of copies of the loop is known as the unrolling factor.

6. The number of copies of a loop is called as
a) rolling factor
b) loop factor
c) unrolling factor
d) loop size
View Answer

Answer: c
Explanation: The number of copies of the loop is known as the unrolling factor and it is a standard transformation that produces instances of the loop body.

7. Which of the following can reduce the loop overhead and thus increase the speed?
a) loop unrolling
b) loop tiling
c) loop permutation
d) loop fusion
View Answer

Answer: a
Explanation: The loop unrolling can reduce the loop overhead, that is the fewer branches per execution of the loop body, which in turn increases the speed but is only restricted to loops with a constant number of iteration. The unrolling can increase the code size.
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8. Which loop transformation can increase the code size?
a) loop permutation
b) loop fusion
c) loop fission
d) loop unrolling
View Answer

Answer: d
Explanation: The loop unrolling can decrease the loop overhead, the fewer branches per execution of the loop body and this can increase the speed but is only restricted to loops with a constant number of iteration and thus the loop unrolling can increase the code size.

9. Which memories are faster in nature?
a) RAM
b) ROM
c) Scratch pad memories
d) EEPROM
View Answer

Answer: c
Explanation: As the memory size decreases, it is faster in operation, that is the smaller memories are faster than the larger memories. The small memories are caches and the scratch pad memories.
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10. Which loop transformation reduces the energy consumption of the memory systems?
a) loop permutation
b) loop tiling
c) loop fission
d) loop fusion
View Answer

Answer: b
Explanation: The loop tiling can reduce the energy the consumption of the memory systems.

Sanfoundry Global Education & Learning Series – Embedded System.

To practice all areas of Embedded System, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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