Intro to Java Programming Chapter 2 Questions and Answers Already Graded A

Intro to Java Programming Chapter 2
Questions and Answers Already Graded
A
What will be the output of `System.out.println(6 + "3");`?

A. 63


✔✔B. 63


C. 9

D. Compilation error




What is the default value of a `float` variable in Java?

A. 0


✔✔B. 0.0


C. 0.0f

D. 0.0d




How do you declare a constant in Java?

A. `int x = 10;`


✔✔B. `final int x = 10;`


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,C. `constant int x = 10;`

D. `x = final 10;`




Which of the following is a valid way to declare a `String` in Java?


✔✔A. `String name = "John";`


B. `String name = John;`

C. `String name = "John`;`

D. `String name = "John"`




What does the `+` operator do when used with two strings?

A. Adds the values

B. Concatenates the strings


✔✔C. Concatenates the strings


D. Divides the strings




How would you declare a `double` variable in Java?

A. `double number = 3.14;`


✔✔B. `double number = 3.14;`


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, C. `double number = 3;`

D. `double number = 3.0;`




What will `System.out.println();` output?

A. 2


✔✔B. 2


C. 2.5

D. Compilation error




How do you declare a boolean variable in Java?

A. `boolean flag = true;`


✔✔B. `boolean flag = true;`


C. `boolean flag = 0;`

D. `boolean flag = 1;`




Which keyword is used to create a constant in Java?

A. `constant`


✔✔B. `final`


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