What is the basic need in protecting memory in multi-user environment?

• A. We need two registers one €?start’ and other €?end’
• B. We need a variable register
• C. A fence register has to be used known as base register.
• D. None of the mentioned

What is the role of base/bound registers?

• A. They give starting address to a program
• B. Program’s addresses are neatly confined to space between the base and the bound registers
• C. They provide encrypted environment
• D. This technique doesn’t protects a program’s address from modification by another user

What is all-or-nothing situation for sharing in memory?

• A. Program makes all its data available to be accessed
• B. It prohibits access to some
• C. It creates rules who can access program memory
• D. It separates program memory and data memory

How is disadvantage of all-or-nothing approach overcome?

• A. Base/bound
• B. Relocation technique
• C. Fence method
• D. Tagged architecture

What is true regarding tagged architecture?

• A. Every word of machine memory has one or more extra bits
• B. Extra bits are used to do padding
• C. Extra bits are not used to identify rights to that word
• D. It is very compatible to code upgrades

What is best solution to have effect of unbounded number if base/bound registers?

• A. Tagged architecture
• B. Segmentation
• C. Fence method
• D. None of the mentioned

What is a major feature of segmentation?

• A. Program is divided in data memory and program memory
• B. Program is executed in segments
• C. Program is divided into pieces having different access rights
• D. It has effect of an unbounded architecture

What is the correct way the segmentation program address is stored?

• A. Name, offset
• B. Start, stop
• C. Access, rights
• D. Offset, rights

What is the main objective of protection?

• A. Ensure all objects are protected individually
• B. Objects have different priority and thus different levels of protection
• C. Ensure that each object is accessed correctly and only by allowed processes
• D. None of the mentioned

What is the principle of least privilege?

• A. Less privileges provide difficulty in executing admin tasks
• B. Users can get temporary high privilege access
• C. Users should be given just enough privileges to perform their tasks
• D. None of the mentioned