Operating Systems Services Quiz

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What is paravirtualization?

A technique where the Virtual Machine Manager mimics the real hardware for virtual machines

Enabling applications to run on different hardware environments by modifying the Virtual Machine Manager

Virtualization without using real hardware but creating an optimized virtual system

A technique where the guest operating system is modified to work with the Virtual Machine Manager (correct)

What characterizes hardware-based solutions for virtual machine creation and management?

They work independently of any operating systems

They create optimized virtual systems without relying on real hardware virtualization

They provide support for virtual machines via firmware (correct)

They run as applications on standard operating systems

How do applications that provide VMM features to guest OS differ from paravirtualization?

They mimic the real hardware for virtual machines

They enable applications to run on different hardware environments without modifying the VMM (correct)

They directly interact with real hardware

They modify the guest OS to optimize performance

In a brute-force attack context, what does it involve?

Using excessive computational power to try all possible key combinations Signup and view all the answers

How does paravirtualization differ from creating an optimized virtual system without real hardware virtualization?

It involves modifying the guest OS to work with the VMM Signup and view all the answers

What does the term 'Masquerading (breach authentication)' refer to?

Intruder sits in data flow, masquerading as sender to receiver and vice versa Signup and view all the answers

What is the main characteristic of malware?

Software designed to exploit, disable, or damage computer Signup and view all the answers

What do 'Rings of protection' aim to do?

Separate functions into domains and order them Signup and view all the answers

What is an Access matrix used for?

Is a table that defines access permissions between specific subjects and objects Signup and view all the answers

What is the purpose of the Memory Management Unit (MMU)?

Hardware device that at run time maps virtual to physical address Signup and view all the answers

In Virtual Memory, what does the separation refer to?

User logical memory from physical memory Signup and view all the answers

What is Copy-on-Write (COW) primarily used for?

Allowing multiple processes to share the same data until a modification is attempted Signup and view all the answers

Who generates the logical address in a computer system?

CPU Signup and view all the answers

When does the Memory Management Unit (MMU) perform address mapping?

At run time Signup and view all the answers

What is required for a student to participate in the online in class test?

Valid identification card Signup and view all the answers

Which of the following are states that a process can be in?

Running Signup and view all the answers

What is a common service offered by Operating Systems?

Error Detection Signup and view all the answers

Which characteristic is common to all Operating Systems?

Program execution Signup and view all the answers

What do all devices from smartwatches to cluster HPCs share in common?

Program execution Signup and view all the answers

Which service is not typically offered by Operating Systems?

Anti-virus Signup and view all the answers

What is the output of the following code: String var_a="c"; String var_b="c"; if (var_a.equals(var_b)){ System.out.println("A and B have the same value!"); } else{ System.out.println("A and B do not have the same value!"); }

A and B have the same value! Signup and view all the answers

Which of the following are valid Java identifiers?

grade Signup and view all the answers

What is the output of the following code: for(int i=10;i>-1;--i) { System.out.print((i+1)+" "); }

1 2 3 4 5 6 7 8 9 10 11 Signup and view all the answers

What is the output of the following code: for(int i=0;I

Compilation Error Signup and view all the answers

Which of the following could be a valid Java identifier based on the naming conventions?

MIN-CAPACITY Signup and view all the answers