CS6401 OS 2marks-16marks, Operating System Question Bank, OS Short Answers – CSE 4th SEM Anna University


CS6401 OS 2marks-16marks

Anna University Regulation 2013 Computer Science Engineering (CSE) CS6401 OS 2marks & 16marks for all 5 units are provided below. Download link for CSE 4th SEM CS6401 Operating System Short answers, Question Bank are listed down for students to make perfect utilization and score maximum marks with our study materials.


CS6401 OS 2marks-16marks

1. What is an Operating system?
An operating system is a program that manages the computer hardware. It also provides a basis for application programs and act as an intermediary between a user of a computer and the computer hardware. It controls and coordinates the use of the hardware among the various application programs for the various users.
2. List the services provided by an Operating System?
Program execution I/O Operation File-System manipulation Communications Error detection
3. What is the Kernel?
A more common definition is that the OS is the one program running at all times on the computer, usually called the kernel, with all else being application programs.
4. What is meant by Mainframe Systems?
Mainframe systems are the first computers developed to tackle many commercial and scientific applications. These systems are developed from the batch systems and then multiprogramming system and finally time sharing systems.
5. What is meant by Batch Systems?
Operators batched together jobs with similar needs and ran through the computer as a group .The operators would sort programs into batches with similar requirements and as system become available, it would run each batch.
6. What is meant by Multiprogramming?
Several users simultaneously compete for system resources (i.e) the job currently waiting for I/O will yield the CPU to another job which is ready to do calculations, if another job is waiting. Thus it increases CPU utilization and system throughput.
7. What is meant by Time-sharing Systems?
Time Sharing is a logical extension of multiprogramming .Here, CPU executes multiple jobs by switching among them, but the switches occur so frequently that the users can interact with each program while it is running. 8. What are the Components of a Computer System? Application Programs

System Program Operating System Computer Hardware
9. What are the advantages of Multiprogramming?
Increased System Throughput Increased CPU utilization
10. What is Multiprocessor System?
Multiprocessor systems have systems more than one processor for communication, sharing the computer bus, the memory, clock & peripheral devices.
11. What are the advantages of multiprocessors?
Increased throughput Economy of scale Increased reliability
12. What are Multiprocessor Systems & give their advantages?
Multiprocessor systems also known as parallel systems or tightly coupled systems are systems that have more than one processor in close communication, sharing the computer bus, the clock and sometimes memory & peripheral devices. Their main advantages are, ™ Increased throughput ™ Economy of scale ™ Increased reliability
CS6401 OS Unit 1 2marks & 16marks – Download Here
CS6401 OS Unit 2 2marks & 16marks – Download Here
CS6401 OS Unit 3 2marks & 16marks – Download Here
CS6401 OS Unit 4 2marks & 16marks – Download Here
CS6401 OS Unit 5 2marks & 16marks – Download Here
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Related Links
For CS6401 OS Previous Year Question Papers – Click here
For CS6401 OS Important Questions/Answer Key – Click here
For CS6401 OS Lecture Notes – Click here
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CS6401 2marks, OS Unit wise short answers – CSE 4th Semester


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