PU- Day 1 Assessments slot 2 - Srinivas's Class

Which of this statement is incorrect?
a) switch statement is more efficient than a set of nested ifs
b) two case constants in the same switch can have identical values
c) switch statement can only test for equality, whereas if statement can evaluate any type of boolean expression
d) it is possible to create a nested switch statements

• A

• B

• C

• D

Which of the following statements about switch statements is true?
a) A switch statement can handle multiple data types
b) The default case in a switch statement is optional
c) A switch statement can only have one default case
d) Switch statements can be used for range checking

• D

• C

• B

• A

What is a limitation of using a switch statement?
a) It cannot handle boolean expressions
b) It can only evaluate integer and character types
c) It requires a break statement to prevent fall-through
d) It cannot be nested

• D

• C

• B

• A

In which scenario is it preferable to use an if statement over a switch statement?
a) When checking for multiple discrete values
b) When evaluating complex boolean expressions
c) When the number of cases is very small
d) When the cases are all integers

• C

• B

• A

• D

What will be the output of the following Java program?

1. class comma_operator

2. {

3. public static void main(String args[])

4. {

5. int sum = 0;

6. for (int i = 0, j = 0; i < 5 & j < 5; ++i, j = i + 1)

7. sum += i;

8. System.out.println(sum);

9. }

10. }

• 20
• 6

• 15
• 5

Which of the following is a valid use case for a switch statement?
a) To evaluate a range of values
b) To handle multiple conditions with the same outcome
c) To perform complex calculations
d) To check for null values

• A

• D

• B

• C

What is the primary advantage of using a switch statement over multiple if statements?
a) It is easier to read and maintain
b) It can handle more data types
c) It executes faster in all scenarios
d) It requires less memory

• D

• A

• B

• C

In a switch statement, what happens if no case matches the input value?
a) The program will throw an error
b) The default case will be executed if it exists
c) The program will skip the switch statement entirely
d) The first case will be executed

• D

• C

• A

• B

What will be the output of the following Java program?

1. class jump_statments

2. {

3. public static void main(String args[])

4. {

5. int x = 2;

6. int y = 0;

7. for ( ; y < 10; ++y)

8. {

9. if (y % x == 0)

10. continue;

11. else if (y == 8)

12. break;

13. else

14. System.out.print(y + " ");

15. }

16. }

17. }

• 2 4 6 8 10
• 1 2 3 4 5
• 1 3 5 7 9
• 0 2 4 6 8

What will be the output of the following Java program?

1. class Output

2. {

3. public static void main(String args[])

4. {

5. final int a=10,b=20;

6. while(a<b)

7. {

8.  

9. System.out.println("Hello");

10. }

11. System.out.println("World");

12.  

13. }

14. }

• Infinite loop printing 'Hello'
• No output due to infinite loop
• Hello World printed once
• Compilation error due to final variables