31. What is AI in terms of database collation?
Answer & Solution
Answer: Option A
Solution:
This question is about database collations in MySQL. Collations define how data is sorted and compared.
The question asks what "AI" stands for in the context of collations.
AI in this case stands for Accent Insensitive.
So the answer is Option A: Accent Insensitive.
Here's what it means:
* Accent Sensitive: When a collation is accent sensitive, it treats characters with accents differently than those without. For example, "é" would be considered different from "e".
* Accent Insensitive: An accent-insensitive collation ignores accents when comparing characters. "é" and "e" would be treated as the same.
This is important for ensuring consistent sorting and searching, especially when dealing with languages that use accents.
32. Which operator is used to access property of an object in PHP?
Answer & Solution
Answer: Option C
Solution:
This question asks about how you "get into" an object in PHP to grab specific pieces of information, called "properties". Imagine an object like a box, and the properties are the things inside.
We need an operator to tell PHP: "Hey, I want to look inside this object and get the property called '____'"
Here's the breakdown of the options:
Option A: . This is used to access properties of classes, not objects. Think of it like a blueprint for making objects.
Option B: * This is for multiplication. It doesn't help us with objects.
Option C: -> This is the winner! The arrow operator (->) is the key to accessing object properties. It's like saying "go inside this object and grab the property I'm pointing at".
Option D: @ This is used for error suppression. It's not for accessing properties.
So the correct answer is Option C: ->
33. A DEFAULT value cannot be supplied to TEXT types.
Answer & Solution
Answer: Option A
Solution:
This question is asking about DEFAULT values in MySQL and how they relate to the TEXT data type.
DEFAULT values are values that are automatically assigned to a column when a new row is inserted into a table, and you don't explicitly specify a value for that column.
TEXT data types are used to store large amounts of text data, like articles, paragraphs, or long descriptions.
So, can you assign a DEFAULT value to a TEXT column?
The answer is False.
You can assign a DEFAULT value to a TEXT column in MySQL.
For example, you could set the default value for a TEXT column called 'description' to 'N/A' to indicate that no description is available.
So, the correct answer is Option B: False.
34. Which language is the core for APIs and communication in MySQL?
Answer & Solution
Answer: Option A
Solution:
This question is asking about the main language used by MySQL to communicate with other programs and services. Think of it like the language a computer uses to talk to other computers.
Out of the options given, C is the language most commonly used by MySQL for its core functions. It's like the foundation that everything else is built upon.
While other languages like Python and Ruby can be used to interact with MySQL, they aren't the primary languages the database itself uses for its internal workings.
Therefore, the answer is Option A: C.
35. The statement that views status variables by aggregating the values over all connections is . . . . . . . .
Answer & Solution
Answer: Option C
Solution:
This question is about how to view the status of your MySQL database. Think of status variables like little pieces of information that tell you how your database is performing. Here's how to break down the options:
Option A: SHOW SESSION STATUS
This command will show you the status variables for the *current* connection you have to the MySQL server.
Option B: SHOW LOCAL STATUS
This command is similar to SHOW SESSION STATUS and is used to show status variables for the current connection.
Option C: SHOW GLOBAL STATUS
This is the correct answer! It shows you the status variables *aggregated* from *all* connections to your MySQL server. This gives you a more comprehensive view of the database's overall health.
Option D: SHOW STATUS
This command is similar to SHOW GLOBAL STATUS, it also shows the status variables aggregated from all connections to your MySQL server.
In simple terms, if you want to see the overall status of your MySQL server across all connections, the command you're looking for is SHOW GLOBAL STATUS.
36. The language that is the core for APIs and communication in MySQL is . . . . . . . .
Answer & Solution
Answer: Option A
Solution:
This question asks about the programming language that MySQL uses to communicate with other programs and applications. It's like the language used to send messages between MySQL and other software. Here's why the correct answer is C:
* C is a fundamental and powerful programming language. MySQL is written primarily in C. This means its core functionality and the way it interacts with other systems are built using C.
Here's why the other options are incorrect:
* C++ is a language closely related to C, but MySQL doesn't rely on it as heavily for its core communication. * Python and Ruby are great programming languages, but they are not the primary language used for MySQL's core communication. They are often used for tasks like building applications that interact with MySQL databases.
In simple terms, imagine MySQL as a robot that understands only C language. If you want to give it instructions or ask it for information, you need to speak C!
37. The operators that are used when a subquery returns multiple rows to be evaluated in comparison to the outer query are . . . . . . . .
Answer & Solution
Answer: Option A
Solution:
This question is about how to handle situations where a subquery (a query nested inside another query) returns multiple results.
Let's break it down:
* Subqueries: These are smaller queries within larger queries. Imagine a query looking for all customers who bought a specific product. The subquery might be to find the IDs of all customers who bought that product.
* Multiple Rows: When a subquery returns multiple results, we need special operators to compare these results with the outer query.
Now, let's look at the options:
A: IN and NOT IN: These are perfect for dealing with multiple rows. They let you check if a value in the outer query exists (or doesn't exist) in the list of values returned by the subquery.
B: EXISTS and NOT EXISTS: These check if a subquery returns any rows at all. They don't compare individual values.
C: OUTER JOIN and INNER JOIN: These combine data from different tables, but they are not specifically designed for handling subqueries with multiple rows.
D: LEFT JOIN and RIGHT JOIN: These are also used for combining tables, and aren't the primary tools for working with subqueries returning multiple results.
Therefore, the answer is Option A: IN and NOT IN.
IN checks if a value is present in the list returned by the subquery, and NOT IN checks if a value is *not* present in that list.
38. "SELECT" clause cannot be used without which clause in Mysql?
Answer & Solution
Answer: Option A
Solution:
This question is about how to write basic queries in MySQL. MySQL is a language used to talk to databases, which are like organized lists of information.
Think of a query like a request you make to the database. The "SELECT" clause is like saying "Give me this information".
Now, the database needs to know WHERE to find the information you want. This is where the "FROM" clause comes in. It tells the database which table to look in.
So, the answer is Option A: FROM.
The other options are important but not essential.
* WHERE helps you filter down the information to just what you need.
* ORDER BY helps organize the results in a specific way.
But you always need to tell the database which table to look in using "FROM"!
39. What can be used in place of MYSQL_SERVER_VERSION?
Answer & Solution
Answer: Option A
Solution:
This question is about finding an alternative to "MYSQL_SERVER_VERSION" in MySQL. This variable tells you the version of the MySQL server you're using.
Let's look at the options:
Option A: LIBMYSQL_VERSION - This variable refers to the version of the MySQL client library, not the server version.
Option B: LIBMYSQL_VERSION_ID - This variable also refers to the version of the MySQL client library.
Option C: MYSQL_VERSION_ID - This variable is the correct answer! It provides the server version number as an integer value.
Option D: MYSQL_ID - This variable doesn't exist in MySQL.
So, the best replacement for "MYSQL_SERVER_VERSION" is "MYSQL_VERSION_ID".
40. Server startup can also be done by the . . . . . . . .
Answer & Solution
Answer: Option A
Solution:
This question asks how we can start the MySQL server. Here's the breakdown:
* Server Startup: This means starting the MySQL database system so you can use it.
* Option File: This file (usually called 'my.cnf' or 'my.ini') contains settings that control how MySQL runs. It doesn't directly start the server.
* Log File: This file records information about what happened in the MySQL server. It doesn't start the server.
* Error File: This file holds details about errors that occurred in the server. It doesn't start the server.
* System File: This is a broad term, it could be anything, including the actual MySQL program files that are needed to run the server.
So, the answer is D: system file **. The system files contain the programs and data that make up the MySQL server, which is what you need to start it.
Read More Section(MySQL Miscellaneous)
Each Section contains maximum 100 MCQs question on MySQL Miscellaneous. To get more questions visit other sections.
- MySQL Miscellaneous - Section 1
- MySQL Miscellaneous - Section 2
- MySQL Miscellaneous - Section 3
- MySQL Miscellaneous - Section 4
- MySQL Miscellaneous - Section 5
- MySQL Miscellaneous - Section 6
- MySQL Miscellaneous - Section 7
- MySQL Miscellaneous - Section 8
- MySQL Miscellaneous - Section 10
- MySQL Miscellaneous - Section 11
- MySQL Miscellaneous - Section 12