Exam (elaborations)
CSCI 340 OS Systems Questions and answers latest update
- Course
- CSCI 340
- Institution
- University Of Illinois - Chicago
CSCI 340 OS Systems Questions and answers latest update
[Show more]
Content preview
CSCI 340 OS SystemsWhat is a program? ANS✔✔ A set of instructions that process data
What is data? ANS✔✔ The way a computer stores information
What does it mean to run the program? ANS✔✔ The CPU is executing
program code instruction after instruction
What computer component executes programs? ANS✔✔ CPU
Where is the running program stored? What else (other than the program
code) is stored there? ANS✔✔ RAM. Registers are also stored in RAM
What do we know about RAM memory? ANS✔✔ It has random-access, it is
slow, and volatile (it needs a power supply to work)
What is a memory stall? ANS✔✔ When the CPU needs data from RAM, but
RAM can't deliver data at the time and the CPU must wait
What long-term storage do we have? ANS✔✔ Hard disk
Wat is an executable file? ANS✔✔ A file that holds encoded sequence of
instructions for a computer to perform
,How does the speed of the CPU, RAM and hard disk compare to each other?
ANS✔✔ The CPU is the faster, RAM is second fastest, and hard disk is the
slowest
What is machine cycle? ANS✔✔ Sequence of steps CPU takes to execute a
single instruction
What are the basic steps of machine cycle? ANS✔✔ fetch, decode, execute
What is CPU core? What does it mean "quad-core CPU", "octa-core CPU" ?
ANS✔✔ The processor of a CPU. Quad and octa means 4 or 8 processors,
respectively, in a CPU.
How does memory look like? ANS✔✔ A linear array of bytes
What is byte? What is a bit? How many bits are in a byte? ANS✔✔ A byte is 8
bits. A bit is the smallest unit of data a computer can process and store
What is memory address? ANS✔✔ A unique number (normally in
hexadecimal) that has the location of the data
1. What is the length of memory address? 2. What does it mean "32-bit
address"? ANS✔✔ The length of memory address is 32 bits (i.e. 4 bytes). 32-
bit address means the address is 32 bits long.
, What is the relationship between C++ variable, RAM and memory address?
ANS✔✔ The C++ variable gets copied in RAM and it acquires a memory
address for that placement in RAM
What is PC? ANS✔✔ Program counter stores the next instruction that is to
be executed by the CPU
What is the language that the CPU understands? ANS✔✔ Machine language
How can we execute program written in higher-level languages? ANS✔✔ We
need a compiler or interpreter that transforms that language into machine
language for the CPU to understand
What is compiler? What are compiler advantages? ANS✔✔ A compiler takes
the high-level language (such as C++) and translates it to CPU machine
language. The compiler advantages is that it can run quickly but it can be OS
dependable
What is interpreter? What are interpreter advantages? ANS✔✔ transforms or
interprets a high-level programming code line by line into code that can be
understood by the machine. Can be slow, but can run in different platforms
OS definition ANS✔✔ A program that manages computer hardware and
provides other programs with a running environment
Examples of different operating systems ANS✔✔ Windows, Linux, MacOS,
ChromeOS, Android, iOS, Unix, VxWorks
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Schoolflix. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
53340 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now