Operating System Practice Test 5

Question 1 of 20

1. From the following, which is not a common file permission?

Read

Write

Execute

Stop

Question 1 of 20

Question 2 of 20

2. Which is not a port scan type?

SYN scanning

TCP scanning

UDP scanning

SYSTEM Scanning

Question 2 of 20

Question 3 of 20

3. What is the major drawback of anomaly detection IDS?

It generates many false alarms

It doesn't detect novel attacks

None of the mentioned

These are very slow at detection

Question 3 of 20

Question 4 of 20

4. Multicasting delivers the content to ___________

a single client

all clients, regardless whether they want the content or not

a group of receivers who indicate they wish to receive the content

none of the mentioned

Question 4 of 20

Question 5 of 20

5. What is characteristic of RADIUS system?

It works on Network layer to deny access to unauthorized people

It is essential for centralized encryption and authentication

It provides centralized authentication mechanism via network devices

It’s a strong File access system

Question 5 of 20

Question 6 of 20

6. A scheduling algorithm can use either ___________ priority or ________ priority.

static, dynamic

none of the mentioned

live, dead

static, still

Question 6 of 20

Question 7 of 20

7. Which of the following is not a characteristic of a virus?

Virus destroy and modify user data

Virus is a code embedded in a legitimate program

Virus cannot be detected

Virus is a standalone program

Question 7 of 20

Question 8 of 20

8. For a computer to deliver continuous media it must guarantee the specific rate and timing requirements, also known as ___________

burst time

quality of service

period

deadline

Question 8 of 20

Question 9 of 20

9. What is the full form of MPEG?

Motion Picture Experts Group

Motion Picture Engineers Group

Motion Pictures Engineering Group

None of the mentioned

Question 9 of 20

Question 10 of 20

10. What are strengths of Network based IDS?

Malicious intent detection

Cost of ownership reduced

All of the mentioned

Real time detection and response

Question 10 of 20

Question 11 of 20

11. What is the preferred way of encryption?

symmetric key

public key-encryption

pre shared secret key

using key distribution center (KDC)

Question 11 of 20

Question 12 of 20

12. What are the factors that define QoS?

Throughput

All of the mentioned

Jitter

Delay

Question 12 of 20

Question 13 of 20

13. What are zombie systems?

Are specific system which are designed to attack by manufacturer

These systems are previously compromised independent systems

None of the mentioned

They are network of known hacking group

Question 13 of 20

Question 14 of 20

14. When will Local playback be used?

none of the mentioned

the multimedia data are delivered from a local file system

a computer next to you is playing something

a multimedia file is being played on a system in the local network

Question 14 of 20

Question 15 of 20

15. What are the characteristics of Host based IDS?

Logs are analysed to detect tails of intrusion

Logs includes logins,file opens and program executions

All of the mentioned

The host operating system logs in the audit information

Question 15 of 20

Question 16 of 20

16. Which of the following is a good practice?

Grant read only permission

Grant limited permission to specified account

Give full permission for remote transferring

Give both read and write permission but not execute

Question 16 of 20

Question 17 of 20

17. Servicing requests strictly according to deadline using EDF may result in ___________

higher bandwidth

higher seek time

lower seek times

lower bandwidth

Question 17 of 20

Question 18 of 20

18. In SCAN - EDF, requests with the same deadlines are ordered according to ___________

EDF policy

FIFO policy

SCAN policy

FCFS policy

Question 18 of 20

Question 19 of 20

19. What are characteristics of Network based IDS?

Filter decides which traffic will not be discarded or passed

It models the normal usage of network as a noise characterization

They look for attack signatures in network traffic

It is programmed to interpret a certain series of packet

Question 19 of 20

Question 20 of 20

20. The level that treats different types of traffics in different ways, giving certain traffic streams higher priority than other streams and with best efforts, but no guarantees are made ___________

Worst effort service

Soft QoS

Best effort service

Hard QoS

Question 20 of 20

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