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DATA STRUCTURES TECHNICAL QUESTIONS
Post: #1

DATA STRUCTURES TECHNICAL QUESTIONS


.doc  DATA STRUCTURES TECHNICAL QUESTIONS.doc (Size: 216 KB / Downloads: 149)

1.What is data structure?
Answer: A data structure is a way of organizing data that considers not only the items stored, but also their relationship to each other. Advance knowledge about the relationship between data items allows designing of efficient algorithms for the manipulation of data.
2. List out the areas in which data structures are applied extensively?
Answer: The name of areas are:

• Compiler Design,
• Operating System,
• Database Management System,
• Statistical analysis package,
• Numerical Analysis,
• Graphics,
• Artificial Intelligence,
• Simulation
3.What are the major data structures used in the following areas : RDBMS, Network data model & Hierarchical data model.
Answer: The major data structures used are as follows:
• RDBMS - Array (i.e. Array of structures)
• Network data model - Graph
• Hierarchical data model - Trees


What does each entry in the Link List called?
Each entry in a linked list is called a node. Think of a node as an entry that has three sub entries. One sub entry contains the data, which may be one attribute or many attributes. Another points to the previous node, and the last points to the next node. When you enter a new item on a linked list, you allocate the new node and then set the pointers to previous and next nodes.

What is Linked List in data structure?
Linked List is one of the fundamental data structures. It consists of a sequence of nodes, each containing arbitrary data fields and one or two (”links”) pointing to the next and/or previous nodes. A linked list is a self-referential datatype because it contains a pointer or link to another data of the same type. Linked lists
Post: #2
DATA STRUCTURES TECHNICAL QUESTIONS



.pdf  datastructure.pdf (Size: 54.27 KB / Downloads: 231)
PART -A


1.Write down the definition of data structures?
A data structure is a mathematical or logical way of organizing data in the memory that
consider not only the items stored but also the relationship to each other and also it is
characterized by accessing functions.

2. Give few examples for data structures?
Stacks, Queue, Linked list, Trees, graphs

3. Define Algorithm?
Algorithm is a solution to a problem independent of programming language. It consist of
set of finite steps which, when carried out for a given set of inputs, produce the corresponding
output and terminate in a finite time.

4. What are the features of an efficient algorithm?
Free of ambiguity
Efficient in execution time
Concise and compact
Completeness
Definiteness
Finiteness

5. List down any four applications of data structures?
Compiler design
Operating System
Database Management system
Network analysis

6. What is meant by an abstract data type(ADT)?
An ADT is a set of operation.A useful tool for specifying the logical properties of a
datatype is the abstract data type.ADT refers to the basic mathematical concept that defines the
datatype. Eg.Objects such as list, set and graph along their operations can be viewed as ADT's.

7.What are the operations of ADT?
Union, Intersection, size, complement and find are the various operations of ADT.

8.What is meant by list ADT?
List ADT is a sequential storage structure. General list of the form a1, a2, a3.…., an and the
size of the list is 'n'. Any element in the list at the position I is defined to be ai, ai+1 the successor
of ai and ai-1 is the predecessor of ai.

9. What are the various operations done under list ADT?
Print list
Insert
Make empty
Remove
Next
Previous
Find kth

10.What is a Rational number?
A Rational number is a number that can be expressed as the quotient of two integers.
Operations on Rational number:
 Creation of rational number from two integers.
 Addition
 Multiplication
 Testing for equality.

11.What are the two parts of ADT?
 Value definition
 Operator definition

12.What is a Sequence?
A sequence is simply an ordered set of elements.A sequence S is sometimes written as the
enumeration of its elements,such as
S = <s0,s1,………..sn-1>
If S contains n elements,then length of S is n.

13.Define len(S),first(S),last(S),nilseq ?
len(S) is the length of the sequence S.
first(S) returns the value of the first element of S
last(S) returns the value of the last element of S
nilseq :Sequence of length 0 is nilseq .ie., contains no element.

14.What are the four basic data types?
int,float,char and double

15.What are the two things specified in declaration of variables in C?
 It specifies the amount of storage that must be set aside for objects declared with
that type.
 How data represented by strings of bits are to be interpreted.
Post: #3
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Post: #4
prove that the time complexity of merge sort is O(nlogn)
Post: #5
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