What is the purpose of a database index?
To prevent data corruption
To optimize data retrieval by providing fast access to specific records
To store large amounts of data
To encrypt data
Correct Answer :
B. To optimize data retrieval by providing fast access to specific records
Related Questions
In object-oriented programming, what is encapsulation?
The process of converting code into an executable program
The process of hiding the implementation details of an object
The process of compiling code
The process of optimizing code for performance
Which data structure uses a Last-In-First-Out (LIFO) order?
Queue
Stack
Linked List
Tree
What is the purpose of the for loop in programming?
To execute a block of code a specific number of times
To make decisions and execute code conditionally
To define a function
To create graphics
What is the purpose of the if statement in programming?
To repeat a block of code
To define a function
To make decisions and execute code conditionally
To create a loop
What is the main purpose of a function in programming?
To store data
To execute code in a random order
To perform a specific task or computation
To create graphics
What is the purpose of the continue statement in programming?
To exit a loop prematurely
To define a function
To print output to the console
To create a loop
What is the purpose of the do-while loop in programming?
To execute a block of code a specific number of times
To create graphics
To make decisions and execute code conditionally
To repeat a block of code while a condition is true, with the condition checked after the loop body
What is the purpose of an operating system's file system?
To organize and manage files and directories on storage devices
To connect to the internet
To display graphics on the screen
To execute programs
What is the purpose of a conditional statement in programming?
To define a function
To repeat a block of code a specific number of times
To make decisions and execute code conditionally
To display information on the screen
Which of the following is a valid way to define a constant in Python?
const pi = 3.14159
final float PI = 3.14159
PI = 3.14159
constant PI = 3.14159
What is a pointer in the C programming language?
A data type used to store text
A variable that stores multiple values
A variable that stores the memory address of another variable
A type of loop
What is the binary equivalent of the decimal number 25?
11001
11100
10011
11010
Which data structure is used to store a collection of elements with no duplicates?
Array
Set
List
Dictionary
Which data type is used to store whole numbers in Python?
float
int
str
bool
What is a DNS server responsible for in the context of the internet?
Storing email messages
Translating domain names into IP addresses
Managing network hardware
Providing web hosting services
What is a variable in programming?
A value that cannot be changed
A container for storing data
A type of loop
A function
What does the term protocol mean in the context of computer networking?
A set of rules and conventions for communication between devices
A type of hardware
A programming language
A software application
What does the acronym SQL stand for?
Structured Query Language
Simple Query Language
System Query Language
Sequential Query Language
Which programming paradigm is based on the concept of objects?
Functional programming
Procedural programming
Object-oriented programming
Declarative programming
In object-oriented programming, what is an instance of a class?
A variable
A function
An object created based on the class
A class variable
What is a function signature in programming?
A unique identifier for a function
The name of a function
The body of a function
A comment within a function
In the binary number system, what is the value of the leftmost digit?
1
0
2
It depends on the context
Which of the following is not a valid data structure in Python?
List
Tuple
Stack
String
What is the purpose of an if-else statement in programming?
To create a loop
To define a function
To make decisions and execute code conditionally
To print output to the console
What does the term protocol mean in the context of computer networking?
A set of rules and conventions for communication between devices
A type of hardware
A programming language
A software application
What is a primary key in a database table?
A key used to unlock the database
A key used for encryption
A unique identifier for each record in the table
A key used for sorting records
What is the purpose of an index in a database?
To sort data alphabetically
To store backup copies of data
To optimize data retrieval by providing fast access to specific records
To encrypt data
What is a loop in programming?
A bug in the code
A function that repeats a specific task
A variable that stores multiple values
A conditional statement
What is the purpose of the else statement in programming?
To define a new variable
To handle exceptions
To execute code if the if condition is true
To execute code if the if condition is false
What is the purpose of the finally block in a try-except-finally construct in Python?
To define a function
To execute code regardless of whether an exception occurred
To create graphics
To repeat a block of code