Pre Test - Pre finals

What is the main purpose of memory management in an operating system?

• To manage CPU usage

• To manage primary memory and process allocation

• To control hardware input and output

• To manage system security

Which type of address is used in source code before memory allocation?

• Physical address

• Relative address

• Symbolic address

• Secondary address

What is a "frame" in memory management?

• A variable-length block of secondary memory

• A fixed-length block of main memory

• A temporary storage in cache memory

• A process queue in the operating system

Which of the following best describes "swapping"?

• Moving processes within the CPU to optimize performance

• Temporarily moving a process from main to secondary memory

• Creating additional memory through virtual memory

• Removing inactive processes permanently

Which type of fragmentation occurs due to fixed-size memory blocks?

• Logical fragmentation

• External fragmentation

• Internal fragmentation

• Swapping fragmentation

In dynamic partitioning, which placement algorithm chooses the first block large enough for a process?

• Best-fit

• First-fit

• Last-fit

• Next-fit

What is the main advantage of virtual memory?

• It allows multitasking by giving processes their private address space

• It creates permanent storage for processes

• It reduces CPU usage significantly

• It eliminates all types of fragmentation

What is one drawback of fixed partitioning in memory management?

• Inefficient use of memory due to internal fragmentation

• High chance of external fragmentation

• Low system overhead

• Dynamic allocation

Which technique divides memory into equally sized frames?

• Dynamic partitioning

• Simple paging

• Simple segmentation

• Virtual memory segmentation

What type of fragmentation does simple paging reduce?

• Internal fragmentation

• External fragmentation

• Logical fragmentation

• None