Data Structures Exam Questions With
All Correct Answers 2025 Latest
Update
What is data structure? CORRECT ANSWERS Data structures refers to the way data is
organized and manipulated. It seeks to find ways to make data access more efficient.
When dealing with data structure, we not only focus on one piece of data, but rather
different set of data and how they can relate to one another in an organized manner.
Differentiate file structure from storage structure. CORRECT ANSWERS Basically, the
key difference is the memory area that is being accessed. When dealing with the
structure that resides the main memory of the computer system, this is referred to as
storage structure. When dealing with an auxiliary structure, we refer to it as file
structures.
When is a binary search best applied? CORRECT ANSWERS A binary search is an
algorithm that is best applied to search a list when the elements are already in order or
sorted. The list is search starting in the middle, such that if that middle value is not the
target search key, it will check to see if it will continue the search on the lower half of the
list or the higher half. The split and search will then continue in the same manner.
What is a linked list? CORRECT ANSWERS A linked list is a sequence of nodes in
which each node is connected to the node following it. This forms a chain-like link of
data storage.
How do you reference all the elements in a one-dimension array? CORRECT
ANSWERS To do this, an indexed loop is used, such that the counter runs from 0 to the
array size minus one. In this manner, we are able to reference all the elements in
sequence by using the loop counter as the array subscript.
In what areas do data structures applied? CORRECT ANSWERS Data structures is
important in almost every aspect where data is involved. In general, algorithms that
involve efficient data structure is applied in the following areas: numerical analysis,
operating system, A.I., compiler design, database management, graphics, and statistical
analysis, to name a few.
What is LIFO? CORRECT ANSWERS LIFO is short for Last In First Out, and refers to
how data is accessed, stored and retrieved. Using this scheme, data that was stored
last , should be the one to be extracted first. This also means that in order to gain
access to the first data, all the other data that was stored before this first data must first
be retrieved and extracted.
, What is a queue? CORRECT ANSWERS A queue is a data structures that can
simulates a list or stream of data. In this structure, new elements are inserted at one
end and existing elements are removed from the other end.
What are binary trees? CORRECT ANSWERS A binary tree is one type of data
structure that has two nodes, a left node and a right node. In programming, binary trees
are actually an extension of the linked list structures.
Which data structures is applied when dealing with a recursive function? CORRECT
ANSWERS Recursion, which is basically a function that calls itself based on a
terminating condition, makes use of the stack. Using LIFO, a call to a recursive function
saves the return address so that it knows how to return to the calling function after the
call terminates.
What is a stack? CORRECT ANSWERS A stack is a data structure in which only the
top element can be accessed. As data is stored in the stack, each data is pushed
downward, leaving the most recently added data on top.
Explain Binary Search Tree CORRECT ANSWERS A binary search tree stores data in
such a way that they can be retrieved very efficiently. The left subtree contains nodes
whose keys are less than the node's key value, while the right subtree contains nodes
whose keys are greater than or equal to the node's key value. Moreover, both subtrees
are also binary search trees.
What are multidimensional arrays? CORRECT ANSWERS Multidimensional arrays
make use of multiple indexes to store data. It is useful when storing data that cannot be
represented using a single dimensional indexing, such as data representation in a board
game, tables with data stored in more than one column.
Are linked lists considered linear or non-linear data structures? CORRECT ANSWERS
It actually depends on where you intend to apply linked lists. If you based it on storage,
a linked list is considered non-linear. On the other hand, if you based it on access
strategies, then a linked list is considered linear.
How does dynamic memory allocation help in managing data? CORRECT ANSWERS
Aside from being able to store simple structured data types, dynamic memory allocation
can combine separately allocated structured blocks to form composite structures that
expand and contract as needed.
What is FIFO? CORRECT ANSWERS FIFO is short for First-in, First-out, and is used to
represent how data is accessed in a queue. Data has been inserted into the queue list
the longest is the one that is removed first.
What is an ordered list? CORRECT ANSWERS An ordered list is a list in which each
node's position in the list is determined by the value of its key component, so that the
key values form an increasing sequence, as the list is traversed.
All Correct Answers 2025 Latest
Update
What is data structure? CORRECT ANSWERS Data structures refers to the way data is
organized and manipulated. It seeks to find ways to make data access more efficient.
When dealing with data structure, we not only focus on one piece of data, but rather
different set of data and how they can relate to one another in an organized manner.
Differentiate file structure from storage structure. CORRECT ANSWERS Basically, the
key difference is the memory area that is being accessed. When dealing with the
structure that resides the main memory of the computer system, this is referred to as
storage structure. When dealing with an auxiliary structure, we refer to it as file
structures.
When is a binary search best applied? CORRECT ANSWERS A binary search is an
algorithm that is best applied to search a list when the elements are already in order or
sorted. The list is search starting in the middle, such that if that middle value is not the
target search key, it will check to see if it will continue the search on the lower half of the
list or the higher half. The split and search will then continue in the same manner.
What is a linked list? CORRECT ANSWERS A linked list is a sequence of nodes in
which each node is connected to the node following it. This forms a chain-like link of
data storage.
How do you reference all the elements in a one-dimension array? CORRECT
ANSWERS To do this, an indexed loop is used, such that the counter runs from 0 to the
array size minus one. In this manner, we are able to reference all the elements in
sequence by using the loop counter as the array subscript.
In what areas do data structures applied? CORRECT ANSWERS Data structures is
important in almost every aspect where data is involved. In general, algorithms that
involve efficient data structure is applied in the following areas: numerical analysis,
operating system, A.I., compiler design, database management, graphics, and statistical
analysis, to name a few.
What is LIFO? CORRECT ANSWERS LIFO is short for Last In First Out, and refers to
how data is accessed, stored and retrieved. Using this scheme, data that was stored
last , should be the one to be extracted first. This also means that in order to gain
access to the first data, all the other data that was stored before this first data must first
be retrieved and extracted.
, What is a queue? CORRECT ANSWERS A queue is a data structures that can
simulates a list or stream of data. In this structure, new elements are inserted at one
end and existing elements are removed from the other end.
What are binary trees? CORRECT ANSWERS A binary tree is one type of data
structure that has two nodes, a left node and a right node. In programming, binary trees
are actually an extension of the linked list structures.
Which data structures is applied when dealing with a recursive function? CORRECT
ANSWERS Recursion, which is basically a function that calls itself based on a
terminating condition, makes use of the stack. Using LIFO, a call to a recursive function
saves the return address so that it knows how to return to the calling function after the
call terminates.
What is a stack? CORRECT ANSWERS A stack is a data structure in which only the
top element can be accessed. As data is stored in the stack, each data is pushed
downward, leaving the most recently added data on top.
Explain Binary Search Tree CORRECT ANSWERS A binary search tree stores data in
such a way that they can be retrieved very efficiently. The left subtree contains nodes
whose keys are less than the node's key value, while the right subtree contains nodes
whose keys are greater than or equal to the node's key value. Moreover, both subtrees
are also binary search trees.
What are multidimensional arrays? CORRECT ANSWERS Multidimensional arrays
make use of multiple indexes to store data. It is useful when storing data that cannot be
represented using a single dimensional indexing, such as data representation in a board
game, tables with data stored in more than one column.
Are linked lists considered linear or non-linear data structures? CORRECT ANSWERS
It actually depends on where you intend to apply linked lists. If you based it on storage,
a linked list is considered non-linear. On the other hand, if you based it on access
strategies, then a linked list is considered linear.
How does dynamic memory allocation help in managing data? CORRECT ANSWERS
Aside from being able to store simple structured data types, dynamic memory allocation
can combine separately allocated structured blocks to form composite structures that
expand and contract as needed.
What is FIFO? CORRECT ANSWERS FIFO is short for First-in, First-out, and is used to
represent how data is accessed in a queue. Data has been inserted into the queue list
the longest is the one that is removed first.
What is an ordered list? CORRECT ANSWERS An ordered list is a list in which each
node's position in the list is determined by the value of its key component, so that the
key values form an increasing sequence, as the list is traversed.
