Computer Facts: Operating System Tools! Trivia Quiz

1. A tree-structured file directory system.

Allows easy storage and retrieval of file names

Is a much debated unecessary feature

Is not essential when we have millions of files

None of the above

A tree-structured file directory system allows easy storage and retrieval of file names because it organizes files in a hierarchical structure, making it easier to locate and access specific files. This structure allows for efficient navigation through directories and subdirectories, enabling users to quickly find the desired files without having to search through millions of files.

Explanation

A tree-structured file directory system allows easy storage and retrieval of file names because it organizes files in a hierarchical structure, making it easier to locate and access specific files. This structure allows for efficient navigation through directories and subdirectories, enabling users to quickly find the desired files without having to search through millions of files.

2. PCB =

Program Control Block

Process Control Block

Process Communication Block

None of the above

The correct answer is Process Control Block. A Process Control Block (PCB) is a data structure used by the operating system to manage information about a process. It contains important details such as process ID, program counter, register information, and memory allocation. The PCB is crucial in process scheduling and context switching, as it allows the operating system to keep track of each process and its state. Therefore, the correct answer is Process Control Block.

Explanation

The correct answer is Process Control Block. A Process Control Block (PCB) is a data structure used by the operating system to manage information about a process. It contains important details such as process ID, program counter, register information, and memory allocation. The PCB is crucial in process scheduling and context switching, as it allows the operating system to keep track of each process and its state. Therefore, the correct answer is Process Control Block.

3. Switching the CPU to another Process requires to save the state of the old process and loading new process state is called as __________.

Process Blocking

Context Switch

Time Sharing

None of the above

When the CPU switches from executing one process to another, it needs to save the state of the current process and load the state of the new process. This is known as a context switch. It involves saving the program counter, registers, and other relevant information of the current process, and then loading the saved state of the new process. This allows the CPU to seamlessly switch between different processes and maintain their individual states. Therefore, the correct answer is "Context Switch".

Explanation

When the CPU switches from executing one process to another, it needs to save the state of the current process and load the state of the new process. This is known as a context switch. It involves saving the program counter, registers, and other relevant information of the current process, and then loading the saved state of the new process. This allows the CPU to seamlessly switch between different processes and maintain their individual states. Therefore, the correct answer is "Context Switch".

4. The mechanism that bring a page into memory only when it is needed is called _____________

Segmentation

Fragmentation

Demand Paging

Page Replacement

Demand paging is the mechanism that brings a page into memory only when it is needed. It is a memory management technique used by operating systems to optimize the use of physical memory. With demand paging, pages are loaded into memory on-demand, as they are referenced by the executing program. This helps to reduce memory wastage and improves overall system performance by only bringing in the necessary pages when required.

Explanation

Demand paging is the mechanism that brings a page into memory only when it is needed. It is a memory management technique used by operating systems to optimize the use of physical memory. With demand paging, pages are loaded into memory on-demand, as they are referenced by the executing program. This helps to reduce memory wastage and improves overall system performance by only bringing in the necessary pages when required.

5. Which of the following will determine your choice of systems software for your computer?

Is it expensive ?

Is it compatible with your hardware ?

Both 1 and 3

The choice of systems software for your computer will be determined by both the compatibility of the applications software you want to use and whether it is compatible with your hardware.

Explanation

The choice of systems software for your computer will be determined by both the compatibility of the applications software you want to use and whether it is compatible with your hardware.

6. The Banker¿s algorithm is used

To prevent deadlock in operating systems

To detect deadlock in operating systems

To rectify a deadlocked state

None of the above

The Banker's algorithm is a resource allocation and deadlock avoidance algorithm used in operating systems. It is designed to prevent deadlock by carefully allocating resources to processes in a way that ensures safety and avoids the possibility of deadlock. By keeping track of the available resources, the maximum need of each process, and the current allocation, the Banker's algorithm can make safe decisions about granting resource requests, thus preventing deadlock from occurring.

Explanation

The Banker's algorithm is a resource allocation and deadlock avoidance algorithm used in operating systems. It is designed to prevent deadlock by carefully allocating resources to processes in a way that ensures safety and avoids the possibility of deadlock. By keeping track of the available resources, the maximum need of each process, and the current allocation, the Banker's algorithm can make safe decisions about granting resource requests, thus preventing deadlock from occurring.

7. Which directory implementation is used in most Operating System?

Single level directory structure

Two level directory structure

Tree directory structure

Acyclic directory structure

Most operating systems use a tree directory structure for organizing and managing files. This structure allows for hierarchical organization, where directories can contain subdirectories and files. This allows for easy navigation and efficient storage of files. Additionally, the tree structure allows for the implementation of access control and permissions, as well as the ability to create and manage multiple levels of directories.

Explanation

Most operating systems use a tree directory structure for organizing and managing files. This structure allows for hierarchical organization, where directories can contain subdirectories and files. This allows for easy navigation and efficient storage of files. Additionally, the tree structure allows for the implementation of access control and permissions, as well as the ability to create and manage multiple levels of directories.

8. A critical region

Is a piece of code which only one process executes at a time

Is a region prone to deadlock

Is a piece of code which only a finite number of processes execute

Is found only in Windows NT operation system

A critical region refers to a section of code that can only be executed by one process at a time. This is typically implemented using synchronization mechanisms such as locks or semaphores to ensure exclusive access. By allowing only one process to execute the critical region at any given time, it helps prevent race conditions and maintain data consistency.

Explanation

A critical region refers to a section of code that can only be executed by one process at a time. This is typically implemented using synchronization mechanisms such as locks or semaphores to ensure exclusive access. By allowing only one process to execute the critical region at any given time, it helps prevent race conditions and maintain data consistency.

9. A thread

Is a lightweight process where the context switching is low

Is a lightweight process where the context swithching is high

Is used to speed up paging

None of the above

A thread is a lightweight process where the context switching is low. This means that threads are designed to be efficient and require less time and resources to switch between them. This allows for faster execution and better performance compared to processes. Threads share the same memory space and resources of a process, allowing for easier communication and coordination between them. Overall, threads are a way to achieve parallelism and improve the efficiency of a program by dividing it into smaller, independent units of execution.

Explanation

A thread is a lightweight process where the context switching is low. This means that threads are designed to be efficient and require less time and resources to switch between them. This allows for faster execution and better performance compared to processes. Threads share the same memory space and resources of a process, allowing for easier communication and coordination between them. Overall, threads are a way to achieve parallelism and improve the efficiency of a program by dividing it into smaller, independent units of execution.

10. ______ is a high level abstraction over Semaphore.

Shared memory

Message passing

Monitor

Mutual exclusion

A monitor is a high level abstraction over Semaphore because it provides a way to synchronize the access to shared resources in a concurrent program. It allows multiple threads to access the shared resources in a mutually exclusive manner, ensuring that only one thread can execute a critical section at a time. Monitors use condition variables to control the execution of threads, allowing them to wait for certain conditions to be met before proceeding. This higher level of abstraction simplifies the process of synchronization compared to using semaphores directly.

Explanation

A monitor is a high level abstraction over Semaphore because it provides a way to synchronize the access to shared resources in a concurrent program. It allows multiple threads to access the shared resources in a mutually exclusive manner, ensuring that only one thread can execute a critical section at a time. Monitors use condition variables to control the execution of threads, allowing them to wait for certain conditions to be met before proceeding. This higher level of abstraction simplifies the process of synchronization compared to using semaphores directly.