Kotlin Online Test

In Kotlin, you are tasked with creating a function executeTasksSequentially that runs a list of suspendable tasks sequentially within a coroutine context. Each task is a lambda function that can perform an asynchronous operation and potentially throw an exception. The function should handle these exceptions and continue executing the remaining tasks. However, a crucial line is missing in the function implementation, and you need to identify which line correctly completes it.

Here's the incomplete function:

This function is particularly useful in scenarios where multiple asynchronous tasks need to be run in order, such as processing a sequence of network requests or database transactions.

A: task.invoke()
B: withContext(Dispatchers.IO) { task() }
C: async { task() }.await()
D: launch { task() }.join()
E: task()
F: delay(1000); task()

In Kotlin, you are asked to complete the implementation of a function searchNodeByName which recursively searches for a node by its name within a tree structure represented by instances of the data class Node(val name: String, val children: List<Node>). However, a crucial line is missing in the implementation, and your task is to identify which line correctly completes the function.

Here's the incomplete function:

A: return searchNodeByName(it, nodeName)
B: if (searchNodeByName(it, nodeName) != null) return searchNodeByName(it, nodeName)
C: try { return searchNodeByName(it, nodeName) } catch (e
D: if (it.name == nodeName) return it
E: it.name == nodeName
F: searchNodeByName(it, nodeName)

In Kotlin, you are tasked with designing a system that manages software dependencies. Each software package is represented by a Package data class, which includes a name and a list of dependencies (other Package objects). The main function, resolveDependencies, should recursively gather all unique dependencies for a given package, including dependencies of dependencies, and return them in a set to avoid duplication.

Here's the initial setup for the data classes and function:

Consider the following structure of packages with nested dependencies:

If println(resolveDependencies(packageE)) is called, what is the expected output?

What does the following Kotlin code print?

We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount.

For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition.

⚠️⚠️⚠️ Note:
- The first line of the input is the length of the array. The second line contains all the elements of the array.
- The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function.
- You need to "print" the final result (not return it) to pass the test cases.

For the example discussed above, the input will be:
5
20 70 -40 30 -10

Your code needs to print the following to the standard output:
20 70 30 -40 -10

A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. 

Example:

Input:
WWMMWWCCC

Expected Output: 
4W3C2M

Explanation: 
‘W’ has the highest count, then ‘C’, then ‘M’. 

⚠️⚠️⚠️ Note:
- The input is already parsed and passed to a function.
- You need to "print" the final result (not return it) to pass the test cases.
- If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’.
- If any of them have the same count, the output should follow this order - M, W, C.