Printing Strings with the format Method in Java

Question 1

What is the purpose of the format method in Java?

a) To define a new class
b) To print a string with formatting options
c) To declare variables
d) To store integer values

Answer 1

b) To print a string with formatting options

Question 2

How are two strings combined in Java?

a) Using a minus symbol
b) By declaring them on the same line
c) By using the plus symbol (+)
d) By using the multiplication symbol (*)

Answer 2

c) By using the plus symbol (+)

Question 3

What is a string literal in Java?

a) A variable that stores numbers
b) A sequence of characters defined in double quotes
c) A class method
d) A function that formats strings

Answer 3

b) A sequence of characters defined in double quotes

Question 4

Can you concatenate a string and an integer in Java using the plus symbol?

a) No, only strings can be concatenated
b) Yes, but it requires casting the integer
c) Yes, Java automatically converts the integer
d) No, it results in a syntax error

Answer 4

c) Yes, Java automatically converts the integer

Question 5

What is the purpose of the %d placeholder in the format method in Java?

a) To substitute a string value
b) To substitute a boolean value
c) To substitute an integer value
d) To substitute a float value

Answer 5

c) To substitute an integer value

Question 6

In Java, how can you place a variable’s value in the middle of a string using format?

a) Use the + operator
b) Use %d for integers or %s for strings
c) It is not possible
d) Place the variable directly inside the string

Answer 6

b) Use %d for integers or %s for strings

Question 7

What is the placeholder %s used for in the format method?

a) Substituting a float value
b) Substituting a string value
c) Substituting an integer value
d) Substituting a double value

Answer 7

b) Substituting a string value

Question 8

How can you declare multiple integer variables on a single line in Java?

a) Separate variables with a semicolon
b) Separate variables with commas
c) Use multiple int keywords
d) Declare one variable at a time

Answer 8

b) Separate variables with commas

Question 9

Where are static variables typically defined in Java?

a) Inside methods
b) Inside constructors
c) Outside methods but inside a class
d) Inside loops

Answer 9

c) Outside methods but inside a class

Question 10

What is a key characteristic of static variables in Java?

a) They are local to each method
b) They are shared by all instances of a class
c) They can only be assigned once
d) They are always private

Answer 10

b) They are shared by all instances of a class

Question 11

In the following code, what is the value printed for the static variable?

 
public static int staticVar = 20;  
public static void main(String[] args) {  
    int localVar = 10;  
    System.out.println("Static variable value is: " + staticVar);  
}

a) 10
b) 0
c) 20
d) 30

Answer 11

c) 20

Question 12

What is printed to the console when the following code is run?

~~~
public static String name = “Smith”;
public static void main(String[] args) {
int salary = 50000;
System.out.println(name + “ Salary is: “ + salary);
}
```

a) Smith Salary is: 50000
b) Smith Salary is:
c) Salary is: 50000
d) Smith 50000

Answer 12

a) Smith Salary is: 50000