Powered By Blogger Widgets | Customized By: Blogging Tips

Thursday, June 7, 2012

Data structures & Algorithms - Multiple Choice Questions (MCQs) - Objective

Set - 1

 

 


1. Two main measures for the efficiency of an algorithm are
a. Processor and memory
b. Complexity and capacity
c. Time and space
d. Data and space

Collection on http://www.cs-mcqs.blogspot.com
  

2. The time factor when determining the efficiency of algorithm is measured by
a. Counting microseconds
b. Counting the number of key operations
c. Counting the number of statements
d. Counting the kilobytes of algorithm

Collection on http://www.cs-mcqs.blogspot.com

3. The space factor when determining the efficiency of algorithm is measured by
a. Counting the maximum memory needed by the algorithm
b. Counting the minimum memory needed by the algorithm
c. Counting the average memory needed by the algorithm
d. Counting the maximum disk space needed by the algorithm

Collection on http://www.cs-mcqs.blogspot.com

4. Which of the following case does not exist in complexity theory
a. Best case
b. Worst case
c. Average case
d. Null case

Collection on http://www.cs-mcqs.blogspot.com

5. The Worst case occur in linear search algorithm when
a. Item is somewhere in the middle of the array
b. Item is not in the array at all
c. Item is the last element in the array
d. Item is the last element in the array or is not there at all

Collection on http://www.cs-mcqs.blogspot.com

6. The Average case occur in linear search algorithm
a. When Item is somewhere in the middle of the array
b. When Item is not in the array at all
c. When Item is the last element in the array
d. When Item is the last element in the array or is not there at all

Collection on http://www.cs-mcqs.blogspot.com

7. The complexity of the average case of an algorithm is
a. Much more complicated to analyze than that of worst case
b. Much more simpler to analyze than that of worst case
c. Sometimes more complicated and some other times simpler than that of worst case
d. None or above

Collection on http://www.cs-mcqs.blogspot.com

8. The complexity of linear search algorithm is
a. O(n)
b. O(log n)
c. O(n2)
d. O(n log n)

Collection on http://www.cs-mcqs.blogspot.com

9. The complexity of Binary search algorithm is
a. O(n)
b. O(log )
c. O(n2)
d. O(n log n)

Collection on http://www.cs-mcqs.blogspot.com

10. The complexity of Bubble sort algorithm is
a. O(n)
b. O(log n)
c. O(n2)
d. O(n log n)

Collection on http://www.cs-mcqs.blogspot.com

11. The complexity of merge sort algorithm is
a. O(n)
b. O(log n)
c. O(n2)
d. O(n log n)

Collection on http://www.cs-mcqs.blogspot.com

12. The indirect change of the values of a variable in one module by another module is called
a. internal change
b. inter-module change
c. side effect
d. side-module update

Collection on http://www.cs-mcqs.blogspot.com

13. Which of the following data structure is not linear data structure?
a. Arrays
b. Linked lists
c. Both of above
d. None of above

Collection on http://www.cs-mcqs.blogspot.com

14. Which of the following data structure is linear data structure?
a. Trees
b. Graphs
c. Arrays
d. None of above

Collection on http://www.cs-mcqs.blogspot.com

15. The operation of processing each element in the list is known as
a. Sorting
b. Merging
c. Inserting
d. Traversal

Collection on http://www.cs-mcqs.blogspot.com

16. Finding the location of the element with a given value is:
a. Traversal
b. Search
c. Sort
d. None of above

Collection on http://www.cs-mcqs.blogspot.com

17. Arrays are best data structures
a. for relatively permanent collections of data
b. for the size of the structure and the data in the structure are constantly changing
c. for both of above situation
d. for none of above situation

Collection on http://www.cs-mcqs.blogspot.com

18. Linked lists are best suited
a. for relatively permanent collections of data
b. for the size of the structure and the data in the structure are constantly changing
c. for both of above situation
d. for none of above situation

Collection on http://www.cs-mcqs.blogspot.com

19. Each array declaration need not give, implicitly or explicitly, the information about
a. the name of array
b. the data type of array
c. the first data from the set to be stored
d. the index set of the array

Collection on http://www.cs-mcqs.blogspot.com

20. The elements of an array are stored successively in memory cells because
a. by this way computer can keep track only the address of the first element and the addresses of other elements can be calculated
b. the architecture of computer memory does not allow arrays to store other than serially
c. both of above
d. none of above
 
Collection on http://www.cs-mcqs.blogspot.com
 



Answers



1. Two main measures for the efficiency of an algorithm are
c. Time and space
2. The time factor when determining the efficiency of algorithm is measured by
b. Counting the number of key operations
3. The space factor when determining the efficiency of algorithm is measured by
a. Counting the maximum memory needed by the algorithm
4. Which of the following case does not exist in complexity theory
d. Null case
5. The Worst case occur in linear search algorithm when
d. Item is the last element in the array or is not there at all
6. The Average case occur in linear search algorithm
a. When Item is somewhere in the middle of the array
7. The complexity of the average case of an algorithm is
a. Much more complicated to analyze than that of worst case
8. The complexity of linear search algorithm is
a. O(n)
9. The complexity of Binary search algorithm is
b. O(log n)
10. The complexity of Bubble sort algorithm is
c. O(n2)
11. The complexity of merge sort algorithm is
d. O(n log n)
12. The indirect change of the values of a variable in one module by another module is called
c. side effect
13. Which of the following data structure is not linear data structure?
d. None of above
14. Which of the following data structure is linear data structure?
c. Arrays
15. The operation of processing each element in the list is known as
d. Traversal
16. Finding the location of the element with a given value is:
b. Search
17. Arrays are best data structures
a. for relatively permanent collections of data
18. Linked lists are best suited
b. for the size of the structure and the data in the structure are constantly changing
19. Each array declaration need not give, implicitly or explicitly, the information about
c. the first data from the set to be stored

20. The elements of an array are stored successively in memory cells because
a. by this way computer can keep track only the address of the first element and the addresses of other elements can be calculated

Set - 2


1. The memory address of the first element of an array is called
a. floor address
b. foundation address
c. first address
d. base address

2. The memory address of fifth element of an array can be calculated by the formula
a. LOC(Array[5]=Base(Array)+w(5-lower bound), where w is the number of words per memory cell for the array
b. LOC(Array[5])=Base(Array[5])+(5-lower bound), where w is the number of words per memory cell for the array
c. LOC(Array[5])=Base(Array[4])+(5-Upper bound), where w is the number of words per memory cell for the array
d. None of above

3. Which of the following data structures are indexed structures?
a. linear arrays
b. linked lists
c. both of above
d. none of above

4. Which of the following is not the required condition for binary search algorithm?
a. The list must be sorted
b. there should be the direct access to the middle element in any sublist
c. There must be mechanism to delete and/or insert elements in list
d. none of above

5. Which of the following is not a limitation of binary search algorithm?
a. must use a sorted array
b. requirement of sorted array is expensive when a lot of insertion and deletions are needed
c. there must be a mechanism to access middle element directly
d. binary search algorithm is not efficient when the data elements are more than 1000.

6. Two dimensional arrays are also called
a. tables arrays
b. matrix arrays
c. both of above
d. none of above

7. A variable P is called pointer if
a. P contains the address of an element in DATA.
b. P points to the address of first element in DATA
c. P can store only memory addresses
d. P contain the DATA and the address of DATA

8. Which of the following data structure can't store the non-homogeneous data elements?
a. Arrays
b. Records
c. Pointers
d. None

9. Which of the following data structure store the homogeneous data elements?
a. Arrays
b. Records
c. Pointers
d. None

10. Each data item in a record may be a group item composed of sub-items; those items which are indecomposable are called
a. elementary items
b. atoms
c. scalars
d. all of above

11. The difference between linear array and a record is
a. An array is suitable for homogeneous data but hte data items in a record may have different data type
b. In a record, there may not be a natural ordering in opposed to linear array.
c. A record form a hierarchical structure but a lienear array does not
d. All of above

12. Which of the following statement is false?
a. Arrays are dense lists and static data structure
b. data elements in linked list need not be stored in adjecent space in memory
c. pointers store the next data element of a list
d. linked lists are collection of the nodes that contain information part and next pointer

13. Binary search algorithm can not be applied to
a. sorted linked list
b. sorted binary trees
c. sorted linear array
d. pointer array

14. When new data are to be inserted into a data structure, but there is no available space; this situation is usually called
a. underflow
b. overflow
c. housefull
d. saturated

15. The situation when in a linked list START=NULL is
a. underflow
b. overflow
c. housefull
d. saturated

16. Which of the following is two way list?
a. grounded header list
b. circular header list
c. linked list with header and trailer nodes
d. none of above

17. Which of the following name does not relate to stacks?
a. FIFO lists
b. LIFO list
c. Piles
d. Push-down lists

18. The term "push" and "pop" is related to the
a. array
b. lists
c. stacks
d. all of above

19. A data structure where elements can be added or removed at either end but not in the middle
a. Linked lists
b. Stacks
c. Queues
d. Deque

20. When inorder traversing a tree resulted E A C K F H D B G; the preorder traversal would return
a. FAEKCDBHG
b. FAEKCDHGB
c. EAFKHDCBG
d. FEAKDCHBG


Answers



1. The memory address of the first element of an array is called
d. base address

2. The memory address of fifth element of an array can be calculated by the formula
a. LOC(Array[5]=Base(Array)+w(5-lower bound), where w is the number of words per memory cell for the array

3. Which of the following data structures are indexed structures?
a. linear arrays

4. Which of the following is not the required condition for binary search algorithm?
c. There must be mechanism to delete and/or insert elements in list

5. Which of the following is not a limitation of binary search algorithm?
d. binary search algorithm is not efficient when the data elements are more than 1000.

6. Two dimensional arrays are also called
c. both of above

7. A variable P is called pointer if
a. P contains the address of an element in DATA.

8. Which of the following data structure can't store the non-homogeneous data elements?
a. Arrays

9. Which of the following data structure store the non-homogeneous data elements?
b. Records

10. Each data item in a record may be a group item composed of sub-items; those items which are indecomposable are called
d. all of above

11. The difference between linear array and a record is
d. All of above

12. Which of the following statement is false?
c. pointers store the next data element of a list

13. Binary search algorithm can not be applied to
a. sorted linked list

14. When new data are to be inserted into a data structure, but there is no available space; this situation is usually called
b. overflow

15. The situation when in a linked list START=NULL is
a. underflow

16. Which of the following is two way list?
d. none of above

17. Which of the following name does not relate to stacks?
a. FIFO lists

18. The term "push" and "pop" is related to the
c. stacks

19. A data structure where elements can be added or removed at either end but not in the middle
d. Deque

20. When inorder traversing a tree resulted E A C K F H D B G; the preorder traversal would return
b. FAEKCDHGB

Set - 3



1.    Which data structure allows deleting data elements from front and inserting at rear?
a. Stacks
b. Queues
c.   Deques
d. Binary search tree

2.    Identify the data structure which allows deletions at both ends of the list but insertion at only one end.
a. Input-restricted deque
b. Output-restricted deque
c.   Priority queues
d. None of above

3.    Which of the following data structure is non-linear type?
a. Strings
b. Lists
c.   Stacks
d. None of above

4.    Which of the following data structure is linear type?
a. Strings
b. Lists
c.   Queues
d. All of above

5.    To represent hierarchical relationship between elements, which data structure is suitable?
a. Deque
b. Priority
c.   Tree
d. All of above

6.    A binary tree whose every node has either zero or two children is called
a. Complete binary tree
b. Binary search tree
c.   Extended binary tree
d. None of above

7.    The depth of a complete binary tree is given by
a. Dn = n log2n
b. Dn = n log2n+1
c.   Dn = log2n
d. Dn = log2n+1

8.    When representing any algebraic expression E which uses only binary operations in a 2-tree,
a. the variable in E will appear as external nodes and operations in internal nodes
b. the operations in E will appear as external nodes and variables in internal nodes
c.   the variables and operations in E will appear only in internal nodes
d. the variables and operations in E will appear only in external nodes

9.    A binary tree can easily be converted into q 2-tree
a. by replacing each empty sub tree by a new internal node
b. by inserting an internal nodes for non-empty node
c.   by inserting an external nodes for non-empty node
d. by replacing each empty sub tree by a new external node

10.  When converting binary tree into extended binary tree, all the original nodes in binary tree are
a. internal nodes on extended tree
b. external nodes on extended tree
c.   vanished on extended tree
d. None of above

11. The post order traversal of a binary tree is DEBFCA. Find out the pre order traversal
a. ABFCDE
b. ADBFEC
c.   ABDECF
d. ABDCEF

12.  Which of the following sorting algorithm is of divide-and-conquer type?
a. Bubble sort
b. Insertion sort
c.   Quick sort
d. All of above

13.  An algorithm that calls itself directly or indirectly is known as
a. Sub algorithm
b. Recursion
c.   Polish notation
d. Traversal algorithm

14.  In a binary tree, certain null entries are replaced by special pointers which point to nodes higher in the tree for efficiency. These special pointers are called
a. Leaf
b. branch
c.   path
d. thread

15.  The in order traversal of tree will yield a sorted listing of elements of tree in
a. Binary trees
b. Binary search trees
c.   Heaps
d. None of above

16.  In a Heap tree
a. Values in a node is greater than every value in left sub tree and smaller than right sub tree
b. Values in a node is greater than every value in children of it
c.   Both of above conditions applies
d. None of above conditions applies

17.  In a graph if e=[u, v], Then u and v are called
a. endpoints of e
b. adjacent nodes
c.   neighbors
d. all of above

18.  A connected graph T without any cycles is called
a. a tree graph
b. free tree
c.   a tree
d. All of above

19.  In a graph if e=(u, v) means
a. u is adjacent to v but v is not adjacent to u
b. e begins at u and ends at v
c.   u is processor and v is successor
d. both b and c

20. If every node u in G is adjacent to every other node v in G, A graph is said to be
a. isolated
b. complete
c.   finite
d. strongly connected



Answers:




1.    Which data structure allows deleting data elements from front and inserting at rear?
b. Queues

2.    Identify the data structure which allows deletions at both ends of the list but insertion at only one end.
a. Input-restricted deque

3.    Which of the following data structure is non-linear type?
d. None of above

4.    Which of the following data structure is linear type?
d. All of above

5.    To represent hierarchical relationship between elements, which data structure is suitable?
c.   Tree

6.    A binary tree whose every node has either zero or two children is called
c. Extended binary tree

7.    The depth of a complete binary tree is given by
d. Dn =  log2n + 1

8.    When representing any algebraic expression E which uses only binary operations in a 2-tree,
a. the variable in E will appear as external nodes and operations in internal nodes

9.    A binary tree can easily be converted into q 2-tree
d. by replacing each empty sub tree by a new external node

10.  When converting binary tree into extended binary tree, all the original nodes in binary tree are
a. internal nodes on extended tree

11. The post order traversal of a binary tree is DEBFCA. Find out the pre order traversal
c.   ABDECF

12.  Which of the following sorting algorithm is of divide-and-conquer type?
c.   Quick sort

13.  An algorithm that calls itself directly or indirectly is known as
b. Recursion

14.  In a binary tree, certain null entries are replaced by special pointers which point to nodes higher in the tree for efficiency. These special pointers are called
d. thread

15.  The in order traversal of tree will yield a sorted listing of elements of tree in
b. Binary search trees

16.  In a Heap tree
b. Values in a node is greater than every value in children of it

17.  In a graph if e=[u, v], Then u and v are called
d. all of above

18.  A connected graph T without any cycles is called
d. All of above

19.  In a graph if e=(u, v) means
d. both b and c

20. If every node u in G is adjacent to every other node v in G, A graph is said to be
b. complete

Popular Posts