Diagnostic Test Computer Science

You are given the following pseudocode:

SET counter TO 0 FOR i FROM 1 TO 5. counter ← counter + 2 ENDFOR OUTPUT counter What is the final output of this algorithm?

• 0

• 5

• 10

• 25

What type of data is most suitable for storing whether a student has passed an exam (true or false)?

• Integer

• String

• Real

• Boolean

A school wants to store the names of 30 students in a class. What is the main advantage of using a one-dimensional array for this task instead of 30 separate string variables?

• Arrays use less memory.

• Arrays allow managing all names under a single identifier, making code writing and maintenance easier (for example, using a loop).

• Arrays automatically sort names alphabetically.

• Arrays can store different types of data together.

The process of converting analog sound into a digital format involves two main steps. These are:

• Compression and Encryption

• Sampling and Quantization

• Upload and Download

• Recovery and Execution

Which of the following is a main task of a computer's operating system?

• Create text documents and presentations.

• Manage the memory and processes of the computer.

• Provide electrical power to the components.

• Design the physical layout of the motherboard.

In the Recover-Decode-Execute cycle, what is the purpose of the 'Decode' step?

• Retrieve the next instruction from memory.

• Increment the value of the Program Counter.

• Make sense of the instruction that was retrieved.

• Execute the instruction.

You are looking for a specific book in a library where all the books are sorted by the author's last name. What search algorithm would be the most efficient?

• Linear Search

• Binary Search

• Bubble Search

• Random Search

A network where all devices are connected to a switch or central server is known as a ________ topology.

• Bus

• Ring

• Star

• Mesh

The main purpose of a protocol like HTTP is:

• To provide power to a network router.

• To define a set of rules on how web browsers and servers communicate.

• To physically connect a computer to a network.

• To prevent viruses from infecting a computer.

What is the main purpose of a parity bit in data transmission?

• Encrypt the data for greater security.

• Compress the data to save space.

• Detect simple errors in the transmitted data.

• Increase the transmission speed.