Computer Science Concepts Quiz
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Questions and Answers

How many enqueue and dequeue operations does one pop operation equal when a stack of N elements is implemented with only one queue?

  • N-1 enqueue, 1 dequeue (correct)
  • 1 enqueue, 1 dequeue
  • 1 enqueue, N-1 dequeue
  • N-1 enqueue, N dequeue

    • What condition must a graph satisfy to be classified as a tree?

  • It must have exactly 5 nodes.
  • It can have 0 or more incoming nodes.
  • There must be no cycles in the graph. (correct)
  • It must be a directed graph.

    • Which combination of traversals is sufficient to construct a Binary Search Tree (BST) from given traversals?

  • Either 2 or 3 is sufficient (correct)
  • 1 and 3
  • 2 and 3
  • Any one of the given three traversals is sufficient

    • Which type of algorithm is known to utilize a priority queue for its operation?

    <p>Dijkstra's Algorithm</p> Signup and view all the answers

    What can be concluded about the time taken to search for elements in an array compared to a singly linked list on a typical modern computer?

    <p>Array search time is less than linked list search time.</p> Signup and view all the answers

    How does the scope of a static local variable compare to other local variables?

    <p>Retains value across calls</p> Signup and view all the answers

    What data type is represented by the following pseudo code: colors = ["Red", "Green", "Blue"]?

    <p>String Array</p> Signup and view all the answers

    How many return values can a function have?

    <p>Multiple</p> Signup and view all the answers

    What is the output of the following loop for (i = 0; i < 5; i++) { if (i == 3) { break; } print(i); }?

    <p>012</p> Signup and view all the answers

    What does the following pseudo code describe in the context of memory management? void printx(struct node* head) { if(!head) return ; printf("%d ",head->data); if(head->next) { printx(head->next->next); printf("%d ",head->data); }}

    <p>6 8 10 11 8 6</p> Signup and view all the answers

    From the following options, select the type of linked list described by the following points: Each node has two links - one to the previous node and one to the next.

    <p>Doubly linked list</p> Signup and view all the answers

    What will the following code help to do? int solve(Queue *Queue) { Stack st; while (!isEmpty(Queue)) { push(&st, deQueue(Queue)); } while (!isEmpty(&st)) { enQueue(Queue, pop(&st)); }}

    <p>Reverses the order of elements in the queue.</p> Signup and view all the answers

    Study Notes

    Question 1 Summary

    • Static local variables are lost when the function ends
    • Their values are retained across different calls to the function
    • They behave similarly to local variables, ending when the block ends

    Question 2 Summary

    • The pseudocode demonstrates the selection of data types
    • The example uses a string array ("colors")

    Question 3 Summary

    • A function can have one return value
    • Multiple return values are possible, but depend on the context

    Question 4 Summary

    • The loop iterates from 0 up to 4
    • If i is 3, the loop breaks
    • The output is 0, 1, 2

    Question 5 Summary

    • The pseudocode describes memory management
    • It focuses on allocating and freeing memory blocks within a program

    Question 6 Summary

    • Object-Oriented Programming emphasizes data encapsulation and inheritance
    • It enables the reuse and extension of objects

    Question 7 Summary

    • A packet should be retransmitted if the acknowledgment is not received within a specified timeout

    Question 8 Summary

    • The loop iterates only 4 times

    Question 9 Summary

    • After sorting the array {4, 2, 8, 1, 5}, the first element is 1

    Question 10 Summary

    • Declarative Programming uses rules for drawing conclusions
    • Widely used in artificial intelligence (AI) and knowledge-based systems

    Question 11 Summary

    • In a flowchart, an oval symbol represents the start or end of a program

    Question 12 Summary

    • Global variables have the longest lifetime in programming

    Question 13 Summary

    • Modifying a copy of an array does not impact the original array
    • Making a copy does not create a new array (shallow copy)

    Question 14 Summary

    • The provided pseudocode calculates the sum of numbers from 1 to 3
    • The calculated sum is printed

    Question 15 Summary

    • IPv6 uses 16 bits per group

    Question 16 Summary

    • A rectangle in a flowchart signifies a process

    Question 17 Summary

    • If a class does not include a constructor, the compiler provides a default one
    • Failure to define a constructor could lead to an uninitialized object

    Question 18 Summary

    • Logic Programming is a paradigm using facts and rules to draw inferences and create knowledge bases for automated reasoning

    Question 19 Summary

    • Using Boolean logic where True is represented as 1 and False is represented as 0, the expression True + False + 3 evaluates to 4.

    Question 20 Summary

    • A function parameter is an input to the function

    Question 21 Summary

    • The provided image displays a binary tree

    Question 22 Summary

    • Binary trees may use a hierarchical index for speed in disk reads
    • They keep keys in sorted order for traversal.

    Question 23 Summary

    • A binary search tree with 7 nodes will require 3 levels

    Question 24 Summary

    • In a binary tree, the inorder successor of a node with two children is the left-most node of its right subtree

    Question 25 Summary

    • The 3rd row in a matrix will be modified depending on how the given function interacts with the input matrix.

    Question 26 Summary

    • x (initially 0) is XORed with each element in the arr array.
    • The output of the calculation depends on array elements

    Question 27 Summary

    • The pseudocode describes a stack that reads characters and outputs them in reverse order.
    • The output for "doselectquiz" is "ziuqtcelesod"

    Question 28 Summary

    • Dijkstra's algorithm is a widely used algorithm to efficiently find the shortest paths in a weighted graph

    Question 29 Summary

    • The worst-case time complexity of a linear search algorithm is O(n)

    Question 30 Summary

    • The maximum number of enqueue operations before overflow depends on the array size, typically 1 less for one based-indexing

    Question 31 Summary

    • The output of the linked list traversal depends on the structure of the list.

    Question 32 Summary

    • Doubly linked list has two links, one to the previous and one to the next in a sequence of nodes

    Question 33 Summary

    • The snippet reverses the order of elements in a queue.

    Question 34 Summary

    • N-1 enqueue; N dequeue. In a single queue to run a stack operation

    Question 35 Summary

    • A tree is a type of directed graph with no cycles

    Question 36 Summary

    • Inorder and Postorder traversals can uniquely specify a binary search tree (BST).

    Question 37 Summary

    • Dijkstra's Algorithm frequently uses Priority Queues to efficiently determine the shortest paths in a weighted graph

    Question 38 Summary

    • Only statement 2 is true, Depth-first search utilizes a stack, while Breadth-first search uses a queue.

    Question 39 Summary

    • Arrays provide faster search (O(1)) compared to linked lists (O(n)).

    Question 40 Summary

    • If a full binary tree has 12 internal nodes, it contains 13 leaf nodes.

    Question 41 Summary

    • The output of the Python command type(message) when message="doselect is the best platform" is <class 'str'>

    Question 42 Summary

    • The output is 2. Python's len() function determines the length of a sequence.
    • The map(int, x) converts each element in x to an integer, and then len() gets the length of the resulting list.

    Question 43 Summary

    • The sorted array in descending order of arr = [10, 3, 7, 1, 9] is [10, 9, 7, 3, 1]

    Question 44 Summary

    • The output of the code x = "Hello"; y = "World"; z = x[2:] + y[:3]; print(z) is llo Wor.

    Question 45 Summary

    • finally block always gets executed in try-except. Whereas except only runs if an exception occurs.

    Question 46 Summary

    • The output is A followed by C followed by <_main__.D object at ...>

    Question 47 Summary

    • Loops repeat code blocks a number of times

    Question 48 Summary

    • The output from the code snippet is 0 1 2 3 Else as print is called during each iteration of loop until i=3 when break is performed

    Question 49 Summary

    • The finally block always runs, regardless of the break within the try block.

    Question 50 Summary

    • The output of the code is 10

    Question 51 Summary

    • The output is True

    Question 52 Summary

    • The value of result is 28

    Question 53 Summary

    • The output is FALSE

    Question 54 Summary

    • The output is [1, 2, 3, 4, 5, 6, 7, 8]

    Question 55 Summary

    • The output is [40, 30, 20]

    Question 56 Summary

    • If the continue is inside the nested loop, the program runs only one iteration of the nested loop and continues with the next iteration of the outer loop.

    Question 57 Summary

    • The output is "A", "B", "C".

    Question 58 Summary

    • Underscores are discouraged as the first character in a variable name (even though it is valid) in Python to indicate private instance variables

    Question 59 Summary

    • The output is 10

    Question 60 Summary

    • The output is 20, 10. The func() call modifies x inside the func scope.

    Question 61 Summary

    • Coderita is a language used for coding, in which the language comprises lowercase English letters

    Question 62 Summary

    • The string input "employee" will output "employees" after the string appending logic

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    Description

    Test your understanding of key computer science concepts including static variables, data types, functions, loops, memory management, and object-oriented programming. This quiz is perfect for students looking to solidify their knowledge in practical applications and theory.

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