BTC Study Guide Exam 1 Questions & Answers 2024/2025
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BTC
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BTC
BTC Study Guide Exam 1 Questions & Answers 2024/2025
List and define the three main characteristics of embedded systems that distinguish such systems from other computing systems. - ANSWERSSingle Functioned, Tightly-Constrained, and Reactive/Real-Time
List 5 common design metrics for embedd...
BTC Study Guide Exam 1 Questions &
Answers 2024/2025
List and define the three main characteristics of embedded systems that distinguish such systems from
other computing systems. - ANSWERSSingle Functioned, Tightly-Constrained, and Reactive/Real-Time
List 5 common design metrics for embedded systems - ANSWERSUnit Cost, NRE Cost, Size, Performance,
Power, Flexibility.
List a pair of design metrics that may compete with one another, providing an intuitive explanation of
the reason behind the competition. - ANSWERSSize vs Performance. A larger size allows more
performance, but if a size gets too large it may be too big for an embedded system.
List and define the three main processor technologies. What are the benefits of using each of the three
different processor technologies? - ANSWERS1) General-purpose: Low time-to-market and NRE costs,
high flexiblity
2) Application specific: Some flexibility, good performance, size, and power.
3) Single purpose: Fast, Low Power, Small Size.
1. What is hardware/software co-design? - ANSWERSIt's a tradeoff among various design metrics like
performance, size, NRE cost, and flexibility.
Discuss three reasons why hardware/software co-design is so challenging? - ANSWERSFor testing there's
no standard tool that fits all; you need to design custom testing environments.
Hardware execution is much slower than software; hardware can takes days to simulate a few cycles.
Co-optimization is very difficult even without HW/SW partitioning.
Discuss three key challenges in the embedded system design process that are unique to embedded
systems design as compared to desktop computing. - ANSWERS1) Design limitations: Limited design to
the small form factor, low energy needs, and long-term stable performance without maintenance.
2) Launch Phase: Time-to-Market and Time-to-Revenue
, 3) Security: very prone to malware and ransomware. Can only fit so much security on a small device
1What three functions do smart contracts contribute towards in the proposed scheme? - ANSWERSThe
implement three key chains: the Identity chain, reputation chain, and verify chain. The Identity chain
stores hash values, reputation chain records the number of transactions lists and calculates the sum
reputation value of participants, and the verify chain records voting results and participant's nodes.
What is the use of symmetric keys in the proposed scheme? - ANSWERSIt's a pair of keys shared
between two parties that can be used to maintain a private information link
What is FairShare? Explain its uses/advantages? - ANSWERSFairShare is a fair, accountable, and secure
data sharing scheme. Some of its uses are mentioned below:
1) It applies proxy re-encryption to ensure security and privacy of data exchanged.
2) Prevents fraudulent activities and resolves disputes amongst parties
3) Establishes provable security guarantees even when participatying parties collide with one another.
What are the limitations of the FairShare Adversarial Model? - ANSWERS1) Overheads are high for larger
file sizes beyond 1MB
2) FairShare allows accessing only non-real-time data, it's not good for time-critical IoT applications.
Provide 2 reasons why the blockchain technology is considered for addressing some of the security and
privacy issues in IoT devices. - ANSWERS1) As a decentralized and immutable technology, it's good in
addressing security and privacy issues.
2) It works as a ledger to keep all transactions known to all users. This is great for security.
Discuss a security challenge in IoT devices and give the method/approach used to address the issue. -
ANSWERSReplay attacks allow attackers to intercept a message from the communication medium. They
can be avoided by tagging each message with a session ID and component number.
What are three advantages of applying blockchain to RPMs? - ANSWERS1) They provide robustness
against failure and data exposure.
2) They provide data security and privacy.
3) They provide a way of proving that information sent/received has not been modified.
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