Question 1

Which of the following best describes the main difference between the OSI and TCP/IP models?

Accepted Answer

The OSI model has seven layers, while the TCP/IP model has four layers.

Question 2

Which layer of the OSI model is responsible for reliable end-to-end communication and error recovery?

Accepted Answer

Transport Layer

Question 3

Given the binary number $$110101_2$$, what is its decimal equivalent?

Accepted Answer

$$53_{10}$$

Question 4

Which of the following is a valid private IP address?

Accepted Answer

192.168.1.1

Question 5

What is the main function of the Domain Name System (DNS) in networking?

Accepted Answer

Translating domain names to IP addresses

Question 6

Which of the following best describes the main advantage of floating point binary representation?

Accepted Answer

It allows representation of very large and very small numbers.

Question 7

A computer stores the number $$-45 in 8-$$bit two's complement form. What is the binary representation?

Accepted Answer

$$11010011$$

Question 8

Which of the following is NOT a weakness of floating point representation?

Accepted Answer

It can represent all integers exactly.

Question 9

Which cloud service model provides only the hardware and networking resources, leaving the operating system and applications to the user?

Accepted Answer

Infrastructure as a Service (IaaS)

Question 10

Which of the following best describes the main role of the Presentation layer in the OSI model?

Accepted Answer

Data translation, encryption, and compression

Question 11

What is the result of adding the binary numbers $$1011_2$$ and $$1101_2$$?

Accepted Answer

$$11000_2$$

Question 12

Which of the following statements about public and private IP addresses is correct?

Accepted Answer

Private IP addresses are not routable on the public Internet.

Question 13

Which of the following is a key benefit of cloud computing?

Accepted Answer

Scalability and on-demand resource allocation

Question 14

Which protocol is used to dynamically exchange routing information between routers in a network?

Accepted Answer

Routing Information Protocol (RIP)

Question 15

What is the decimal value of the hexadecimal number $$2F_{16}$$?

Accepted Answer

$$47_{10}$$

Question 16

Which of the following best describes the function of the Data Link layer in the OSI model?

Accepted Answer

Provides node-to-node data transfer and error detection

Question 17

A company wants to deploy a web application without managing the underlying hardware or operating system. Which cloud service model is most appropriate?

Accepted Answer

Platform as a Service (PaaS)

Question 18

Which of the following is a valid reason for normalizing floating point numbers in binary representation?

Accepted Answer

To maximize the precision by ensuring the most significant bit is non-zero

Question 19

Which of the following is NOT a function of the Application layer in the OSI model?

Accepted Answer

Routing packets between networks

Question 20

Which of the following best describes the main difference between SaaS and PaaS cloud service models?

Accepted Answer

SaaS provides ready-to-use applications, while PaaS provides a platform for application development.

A Level Computer Science Study Pack: Data Representation & Networking

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