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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A

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12th Standard Computer Applications English Medium - PHP Conditional Statements 3 Mark Book Back Question Paper and Answer Key 2022 - 2023

Published on: 05/09/2022

QB365 provides a detailed and simple solution for every Possible Book Back Questions in Class 12 Computer Applications Subject -PHP Conditional Statements, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

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Questions:

Generic 3

5 x 3 = 15

Differentiate if statement and if elseif else statement.

Write Short notes on Switch statement

Differentiate Switch and if else statement.

What is the purpose of if... elseif else statement?

Write the features Conditional Statements in PHP.

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Answers Key:

Generic 3

5 x 3 = 15

No.	if elseif else statement	if statement
1	If-elseif-else statement is a combination of if-else statement.	If statement executes a single statement
2	More than one statement can execute the condition based on user needs	Only one statement can execute
3	If the condition if false more alternatives are there.	If the condition is false, there is no alternative.

(i) The switch-case statement is an alternative to if... elseif... else statement which does almost the same thing.
(ii) The switch-case statement tests a variable against a series of values until it finds a match, and then executes the block of code corresponding to that match.
(iii) The switch statement executes line by line, unlike if... elseif...else.
(iv) It also executes all the subsequent case statement till the end of the switch block automatically.
(v) To prevent this add a break statement to the end of each case block.

Switch Statement	If else statement
Switch statement uses single expression for multiple choices.	if-else statement uses multiple statement for multiple choices.
It test only for equality.	It test for equality as well as for logical expression.
Statement will be executed is decided by user.	Evaluates any type
If switch statements does not match any cases, the default statements is executed.	If the condition fails, then by default the else statement is executed.

(i) In if...else if...else statements, more than one block of statement can execute based on the condition and user needs.
(ii) If we want to check for another condition in the else part, choose if... elseif ... else statement
(iii) Unlike else, it will execute that alternative expression only if the elseif conditional expression evaluates to "True value.

(i) Conditional statements are useful for writing decision making logics. It is the most important feature of many programming languages, including PHP.
(ii) When we write the code for conditional statements very often, we can perform different actions for different decisions in different business logic.