PHP Quiz: Trivia Knowledge! Exam

1. Which operator will check if two variables are the same?

=

==

!=

The == operator is used to check if two variables are the same. It compares the values of the variables and returns true if they are equal, and false otherwise. This is different from the = operator, which is used for assignment. The != operator, on the other hand, checks if two variables are not equal.

Explanation

The == operator is used to check if two variables are the same. It compares the values of the variables and returns true if they are equal, and false otherwise. This is different from the = operator, which is used for assignment. The != operator, on the other hand, checks if two variables are not equal.

2. +, -, *, /, %, are all examples of what category of operators.

Assignment Operators

Arithmetic Operators

String Operators

Comparison Operators

The given correct answer is "Arithmetic Operators". Arithmetic operators are used to perform mathematical calculations such as addition (+), subtraction (-), multiplication (*), division (/), and modulus (%). These operators are used to manipulate numerical values and perform arithmetic operations in programming languages.

Explanation

The given correct answer is "Arithmetic Operators". Arithmetic operators are used to perform mathematical calculations such as addition (+), subtraction (-), multiplication (*), division (/), and modulus (%). These operators are used to manipulate numerical values and perform arithmetic operations in programming languages.

3. The assignment operator looks like this:

==

=

+

++

The assignment operator is represented by the symbol "=". It is used to assign a value to a variable. In programming, the "=" operator is used to store a value on the right-hand side into the variable on the left-hand side. For example, "x = 5" assigns the value 5 to the variable x. This operator is different from the "==" operator, which is used for comparison and checks if two values are equal.

Explanation

The assignment operator is represented by the symbol "=". It is used to assign a value to a variable. In programming, the "=" operator is used to store a value on the right-hand side into the variable on the left-hand side. For example, "x = 5" assigns the value 5 to the variable x. This operator is different from the "==" operator, which is used for comparison and checks if two values are equal.

4. If I wanted to concatenate a word to a string variable I would use which of these?

$dan .= "Dan";

$dan += "Dan";

$dan &= "Dan";

$Dan == "Dan";

To concatenate a word to a string variable, the correct operator to use is ".=". This operator appends the word "Dan" to the existing value of the variable $dan. The other options are incorrect: "$dan +=" is used for arithmetic addition, "$dan &=" is used for bitwise AND operation, and "$Dan ==" is used for comparison.

Explanation

To concatenate a word to a string variable, the correct operator to use is ".=". This operator appends the word "Dan" to the existing value of the variable $dan. The other options are incorrect: "$dan +=" is used for arithmetic addition, "$dan &=" is used for bitwise AND operation, and "$Dan ==" is used for comparison.

5. What is the correct way to include the file "time.inc"?

< ?php include("time.inc"); ? >

< !--include file="time.inc"-- >

< % include file="time.inc" % >

< ?php include_file("time.inc"); ? >

The correct way to include the file "time.inc" is by using the PHP include function as shown in the answer. The include function allows the contents of the specified file to be included and executed in the current script.

Explanation

The correct way to include the file "time.inc" is by using the PHP include function as shown in the answer. The include function allows the contents of the specified file to be included and executed in the current script.

6. Include files must have a file extension of ".inc"

True

False

The statement is false because include files can have any file extension, not just ".inc". The file extension is just a way to identify the file type, and it does not restrict the content or purpose of the file.

Explanation

The statement is false because include files can have any file extension, not just ".inc". The file extension is just a way to identify the file type, and it does not restrict the content or purpose of the file.

7. The concatenation operator in PHP looks like this:

+

&

.

$

The correct answer is "." because the dot (.) is the concatenation operator in PHP. It is used to join two strings together, creating a new string that contains both of the original strings.

Explanation

The correct answer is "." because the dot (.) is the concatenation operator in PHP. It is used to join two strings together, creating a new string that contains both of the original strings.

8. Which of the following statement is valid to use a Node module fs in a Node-based application?

Var fs = require("fs");

Var fs = import("fs");

Package fs;

Import fs;

The correct answer is "var fs = require("fs");". In Node.js, the "require" function is used to import modules. The "fs" module is a built-in module in Node.js that provides file system-related functionality. Therefore, to use the "fs" module in a Node-based application, we need to use the "require" function to import it.

Explanation

The correct answer is "var fs = require("fs");". In Node.js, the "require" function is used to import modules. The "fs" module is a built-in module in Node.js that provides file system-related functionality. Therefore, to use the "fs" module in a Node-based application, we need to use the "require" function to import it.

9. Which command works the same as the include() command? (the only difference being include() creates a warning whereas this alternative creates an error() when they fail)

Input()

Add()

Aquire()

Require()

The command that works the same as the include() command, with the only difference being that include() creates a warning when it fails whereas require() creates an error when it fails, is require().

Explanation

The command that works the same as the include() command, with the only difference being that include() creates a warning when it fails whereas require() creates an error when it fails, is require().

10. Which of these is the correct syntax for an if ... else statement?

If (condition) code to be executed if condition is true;

If (condition) code to be executed if condition is true;else code to be executed if condition is false;

If (condition) code to be executed if condition is true;elseif(condition) code to be executed if condition is false;

The correct syntax for an if...else statement is "if (condition) code to be executed if condition is true; else code to be executed if condition is false;". This syntax allows for the execution of different blocks of code based on whether the condition is true or false. The "if" keyword is followed by the condition in parentheses, and the code block to be executed if the condition is true is enclosed in curly braces. The "else" keyword is followed by the code block to be executed if the condition is false, also enclosed in curly braces.

Explanation

The correct syntax for an if...else statement is "if (condition) code to be executed if condition is true; else code to be executed if condition is false;". This syntax allows for the execution of different blocks of code based on whether the condition is true or false. The "if" keyword is followed by the condition in parentheses, and the code block to be executed if the condition is true is enclosed in curly braces. The "else" keyword is followed by the code block to be executed if the condition is false, also enclosed in curly braces.

11. Which of these is the correct syntax for a switch statement?

The correct syntax for a switch statement is to use the keyword "switch" followed by the variable or expression that is being tested inside parentheses. Then, each case is defined using the keyword "case" followed by a label. The code to be executed for each case is enclosed in curly braces. The keyword "break" is used to exit the switch statement after executing the code for a particular case. The "default" keyword is used to define the code that will be executed if none of the cases match the value of the variable or expression being tested.

Explanation

The correct syntax for a switch statement is to use the keyword "switch" followed by the variable or expression that is being tested inside parentheses. Then, each case is defined using the keyword "case" followed by a label. The code to be executed for each case is enclosed in curly braces. The keyword "break" is used to exit the switch statement after executing the code for a particular case. The "default" keyword is used to define the code that will be executed if none of the cases match the value of the variable or expression being tested.

12. Which of these are logical operators?

&&

||

!

£

^

The logical operators in programming are used to combine or negate logical expressions. The && operator represents the logical AND operation, which returns true only if both operands are true. The || operator represents the logical OR operation, which returns true if at least one of the operands is true. The ! operator represents the logical NOT operation, which returns the opposite of the operand's value. However, £ and ^ are not logical operators and do not have any defined meaning in this context.

Explanation

The logical operators in programming are used to combine or negate logical expressions. The && operator represents the logical AND operation, which returns true only if both operands are true. The || operator represents the logical OR operation, which returns true if at least one of the operands is true. The ! operator represents the logical NOT operation, which returns the opposite of the operand's value. However, £ and ^ are not logical operators and do not have any defined meaning in this context.

Submit

13. Which of the following code print the name of operating system?

Console.log('type : ' + os.type);

Console.log('type : ' + os.type());

Console.log('type : ' + os.getType());

None of the above.

The correct answer is "console.log('type : ' + os.getType());". This code will print the name of the operating system by using the os.getType() function.

Explanation

The correct answer is "console.log('type : ' + os.getType());". This code will print the name of the operating system by using the os.getType() function.

14. Which of the following statement is valid to use a Node module HTTP in a Node-based application?

Var http = require("http");

Var http = import("http");

Package http;

Import http;

The correct answer is "var http = require("http");". In Node.js, the require() function is used to import modules. The "http" module is a built-in module in Node.js that provides functionality for creating HTTP servers and making HTTP requests. Therefore, to use the "http" module in a Node-based application, we need to import it using the require() function and assign it to a variable named "http".

Explanation

The correct answer is "var http = require("http");". In Node.js, the require() function is used to import modules. The "http" module is a built-in module in Node.js that provides functionality for creating HTTP servers and making HTTP requests. Therefore, to use the "http" module in a Node-based application, we need to import it using the require() function and assign it to a variable named "http".

15. Which of the following is true about __filename global object?

The __filename represents the filename of the code being executed.

The __filename represents the resolved absolute path of code file.

Both of the above.

None of the above.

The correct answer is "Both of the above." The __filename global object represents both the filename of the code being executed and the resolved absolute path of the code file.

Explanation

The correct answer is "Both of the above." The __filename global object represents both the filename of the code being executed and the resolved absolute path of the code file.