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Questions and Answers
What happens when a break statement is reached in a switch case?
What happens when a break statement is reached in a switch case?
- Control jumps to the next line after the switch statement. (correct)
- The switch statement continues to the next case.
- The program terminates entirely.
- None of the cases are executed.
What will be printed if day is set to 5 in the following code? int day = 5; switch(day) { case 1: System.out.println("Monday"); break; case 2: System.out.println("Tuesday"); break; default: System.out.println("Weekend"); }
What will be printed if day is set to 5 in the following code? int day = 5; switch(day) { case 1: System.out.println("Monday"); break; case 2: System.out.println("Tuesday"); break; default: System.out.println("Weekend"); }
- No output
- Tuesday
- Monday
- Weekend (correct)
Which statement accurately describes the function of a default case in a switch statement?
Which statement accurately describes the function of a default case in a switch statement?
- It must always be the first case in the switch statement.
- It can replace all other cases.
- It is optional and executes when no cases match. (correct)
- It is executed only if all other cases are skipped.
In a while loop, what condition is tested to control the flow of the loop?
In a while loop, what condition is tested to control the flow of the loop?
If the condition in a while loop evaluates to false, what happens next?
If the condition in a while loop evaluates to false, what happens next?
Which of the following statements is true regarding the structure of switch-case statements?
Which of the following statements is true regarding the structure of switch-case statements?
What is the output of the following code when x starts at 3? while(x > 0) { System.out.println(x); x--; }
What is the output of the following code when x starts at 3? while(x > 0) { System.out.println(x); x--; }
What happens when the condition in an if statement evaluates to false?
What happens when the condition in an if statement evaluates to false?
What will happen if a case in a switch statement does not end with a break?
What will happen if a case in a switch statement does not end with a break?
Which operator can be used to check if two values are equal in a conditional statement?
Which operator can be used to check if two values are equal in a conditional statement?
What is the output of the following code snippet? int x = 7; if(x > 6) { System.out.println("Above 6"); } else { System.out.println("6 or less"); }
What is the output of the following code snippet? int x = 7; if(x > 6) { System.out.println("Above 6"); } else { System.out.println("6 or less"); }
In a nested if statement, what must be true for the inner if statement to be executed?
In a nested if statement, what must be true for the inner if statement to be executed?
What is the purpose of using an else if statement?
What is the purpose of using an else if statement?
Which of the following outputs "Error" based on the condition check of age?
Which of the following outputs "Error" based on the condition check of age?
What is the output when int age = 25; is passed into the following code? if(age > 16) { System.out.println("Hello!"); } else { System.out.println("Not Allowed!"); }
What is the output when int age = 25; is passed into the following code? if(age > 16) { System.out.println("Hello!"); } else { System.out.println("Not Allowed!"); }
Which conditional statement structure is best suited for evaluating multiple distinct conditions without deep nesting?
Which conditional statement structure is best suited for evaluating multiple distinct conditions without deep nesting?
What will the output be if $age = 25$ in the following code: $if(!(age > 18)) { System.out.println("Too Young"); } else { System.out.println("Welcome"); }$?
What will the output be if $age = 25$ in the following code: $if(!(age > 18)) { System.out.println("Too Young"); } else { System.out.println("Welcome"); }$?
Which operator is used to check if both conditions are true in the given examples?
Which operator is used to check if both conditions are true in the given examples?
In the context of logical operators, what will be the result if at least one condition is true when using the OR operator?
In the context of logical operators, what will be the result if at least one condition is true when using the OR operator?
What is the purpose of a break statement in a switch case?
What is the purpose of a break statement in a switch case?
In which scenario would the following statement execute: $if(age > 20 && money > 320)$?
In which scenario would the following statement execute: $if(age > 20 && money > 320)$?
What does the NOT operator do to a condition?
What does the NOT operator do to a condition?
What will happen if a variable being switched on does not match any case in a switch statement?
What will happen if a variable being switched on does not match any case in a switch statement?
How can multiple case statements be defined in a switch statement?
How can multiple case statements be defined in a switch statement?
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Study Notes
Conditional Statements
- Conditional statements enable programs to make decisions based on various conditions.
- The
ifstatement is a fundamental conditional statement. - The
ifstatement executes a block of code if its condition evaluates to true. - The
ifstatement ignores the code within its block if its condition evaluates to false. - Comparison Operators for Conditions
>(greater than)!=(not equal to)==(equal to)>=(greater than or equal to)<(less than)<=(less than or equal to)
- Syntax:
if (condition) { // Code to execute }
if…else Statements
- The
elsestatement complements theifstatement. - The
elsestatement executes when theifstatement's condition evaluates to false. - Syntax:
if (condition) { // Code to execute when true } else { // Code to execute when false }
Nested if Statements
- One
if-elsestatement can be embedded within anotheriforelsestatement. - Nested
ifstatements provide greater flexibility in handling multiple conditions.
else if Statements
- The
else ifstatement simplifies the process of evaluating multiple conditions. - It avoids the need for multiple nested
if-elsestatements.
Logical Operators
&&(AND Operator): This operator requires both conditions to be true for the overall expression to be true.||(OR Operator): This operator requires at least one condition to be true for the overall expression to be true.!(NOT Operator): This operator reverses the truth value of the expression. If the expression is true, the NOT operator makes it false, and vice versa.
switch Statement
- Tests a variable against a list of values (cases).
- Executes code associated with the matching case.
- The
switchstatement provides a more structured way to compare a value against multiple possibilities compared to a series ofif-elsestatements. - Syntax:
switch (expression) { case value1 : // Code } breakStatement: Stops execution of theswitchstatement.defaultStatement: Executes if no other case matches.
while Loop
- Repeatedly executes code as long as a condition remains true.
- The loop continues to iterate until the specified condition becomes false.
- Useful for scenarios that require repetition based on a dynamic condition.
- Syntax:
while(condition) { // Code to execute }
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