#4 Systems Software

1. Which of the following is not a function of an operating system?

• A. Translating high-level program code into machine code
• B. Memory management
• C. Hardware peripheral management,
• D. Providing a user interface

2. Which of the following explains what paging is?

• A. Programs in memory get divided into physical blocks of equal sizes of a few kilobytes each
• B. Using blocks of a computer's hard disk as an extension of the memory unit
• C. This is the creation of a virtual machine ©
• D. Programs in memory are divided up into modular structures, creating logical separations between the whole program's component parts

3. Which of the following describes segmentation?

• A. Programs in memory are divided up into modular structures, creating logical separations between the whole program's component parts
• B. Using blocks of a computer's hard disk as an extension of the memory unit
• C. This is the creation of a virtual machine
• D. Programs in memory get divided into physical blocks of equal sizes of a few kilobytes each

4. Explain why virtual memory is necessary.

• A. It allows for disk thrashing where the hard disk is used to speed up processing time
• B. Pages of programs that are unlikely to be used can be displaced out of RAM to allow that space to be reallocated to more current concerns
• C. It is required for servicing interrupts
• D. It provides a halfway house between the cache and the RAM to allow data and instructions to reside there during transfer

5. Expand the acronym ISR.

• A. Integrated System RAM
• B. Integrated System ROM
• C. Interrupt Service Routine
• D. Interrupt System Routine

6. Which of these describes a characteristic of an interrupt?

• A. Does not involve continuously polling a peripheral to see if it has data to transmit.
• B. that the task will gain instant control of the CPU
• C. Stops the CPU from working for a split second
• D. Peripheral devices cannot interrupt the CPU as they are too far removed from it

7. Which of these is not a scheduling practice used by an operating system?

• A. Round robin
• B. First come first served
• C. Shortest job first
• D. Largest mmory cpcity first

8. Which of these is not a feature of a multilevel feedback queue?

• A. Assigns preference to short tasks
• B. Assigns preference to processes that are engaging with input and output
• C. Keeps a single queue of all tasks
• D. Categorises processes by looking at the extent of their need for the CPU

9. Which of the following is a characteristic of a multitasking operating system?

• A. It cannot be achieved when there is only one CPU core
• B. It has to be carried out on a distributed system
• C. A single CPU switches between jobs frequently
• D. Several users have direct access to one CPU simultaneously

10. Which of the following types of operating system is used in safety-critical systems in chemical plants?

• A. Batch processing
• B. Single user
• C. Real-time
• D. Single task