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WorksheetsJava Beginners
Total questions: 15
Worksheet time: 5mins
Which of the following data types can be used as the controlling expression in a switch statement in Java?
int
char
String
All of the above
What happens if a break statement is omitted in a case block of a switch statement?
The switch statement continues to the next case block.
The switch statement exits the switch block.
The switch statement generates a compilation error.
The behavior is undefined.
Which of the following statements is true about fall-through behavior in a switch statement?
Fall-through behavior is an error in Java switch statements.
Fall-through behavior allows the execution of multiple case blocks sequentially until a break statement is encountered.
Fall-through behavior is only allowed in switch statements with a default case.
Fall-through behavior is the default behavior of a switch statement.
Which of the following statements is true regarding the use of switch statements with String objects in Java?
Switch statements with String objects are not allowed in Java.
Switch statements with String objects can only be used with constant expressions.
Switch statements with String objects are supported in Java starting from version 7.
Switch statements with String objects are less efficient than using if-else statements.
Which of the following is NOT a valid use case for a switch statement in Java?
Menu selection in a command-line application
Evaluating complex conditions based on user input
Handling different HTTP methods in a web server
Implementing a state machine
Which method is the entry point of any Java program?
init()
start()
main()
run()
How do you print "Hello, World!" in Java?
System.out.print("Hello, World!");
System.print("Hello, Word!");
System.out.println("Hello, World!")
System.write(Hello, World!");
What is the output of the following code snippet?
double num = 10 / 3;
System.out.println(num);
3.3333333333333335
3.0
3
compilation error
What is the purpose of using the char data type in Java?
To represent floating-point numbers.
To represent single characters.
To represent true or false values.
To represent large integers.
Which operator is used to compare two values for equality in Java?
=
==
equals()
!=
What is the result of the expression 5 + 2 * 3 in Java?
17
21
11
13
What is the significance of the default case in a switch statement?
It is executed when none of the other cases match the value of the expression.
It is executed before any other case in the switch statement.
It is optional and not required in a switch statement.
It is executed if the value of the expression is null.
In a for loop in Java, which of the following components is optional?
Initialization
Condition
Increment/Decrement
All components are mandatory
What does the following for loop do?
for (int i = 0; i < 10; i += 2)
{ System.out.println(i);
}
Prints even numbers from 0 to 8.
Prints even numbers from 0 to 10.
Prints numbers from 0 to 10 with a step of 2.
Prints numbers from 0 to 8 with a step of 2
Non- Primitive data type
int
double
boolean
String
