Java Chapter 2 Questions and Answers Latest Update Graded A+

Java Chapter 2 Questions and Answers
Latest Update Graded A+
Which of these is not a primitive data type in Java?

A. `int`

B. `double`

C. `char`


✔✔D. `String`




How do you store a decimal value in a variable in Java?


✔✔A. `double x = 10.5;`


B. `decimal x = 10.5;`

C. `int x = 10.5;`

D. `float x = 10;`




What will be the output of `System.out.println("Hello" + " World!");`?

A. HelloWorld!


✔✔B. Hello World!


C. Hello + World!

1

,D. Compilation error




How do you create a character variable in Java?

A. `char letter = "A";`


✔✔B. `char letter = 'A';`


C. `char letter = "A";`

D. `Character letter = 'A';`




How do you concatenate two strings in Java?

A. `str1.merge(str2);`


✔✔B. `str1 + str2;`


C. `str1.concat(str2);`

D. Both B and C




What is the result of the following code: `System.out.println(20 - 5 * 2);`?

A. 30


✔✔B. 10


C. 5


2

,D. 0




Which of the following is the correct syntax for creating a for loop in Java?

A. `for(int i = 0; i < 10; i++)`


✔✔B. `for(int i = 0; i < 10; i++) { }`


C. `for(int i = 0 i < 10 i++) { }`

D. `for(int i = 0; i < 10; i++)`




What is the purpose of the `Math.pow()` method in Java?

A. To calculate the factorial of a number


✔✔B. To calculate the power of a number


C. To calculate the square root of a number

D. To find the absolute value of a number




What will the following code print: `System.out.println();`?

A. 3


✔✔B. 3


C. 3.0


3

, D. Compilation error




What is the default value of an integer variable in Java?

A. 0


✔✔B. 0


C. null

D. 1




Which of the following is a valid way to declare a float variable in Java?

A. `float f = 10.5;`


✔✔B. `float f = 10.5f;`


C. `float f = 10.5d;`

D. `float f = 10;`




What will be the output of `System.out.println("Java" + 10 + 20);`?

A. 30


✔✔B. Java1020


C. Java30


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