Java 1

Java 1

University

22 Qs

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Java 1

Java 1

Assessment

Quiz

Computers

University

Practice Problem

Hard

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22 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the two main types of data types in Java?

Primitive and Composite
Primitive and Reference
Integer and Floating-point
Static and Dynamic

Answer explanation

Java has primitive data types (e.g., int, boolean) and reference data types (e.g., objects, arrays).

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT a primitive data type in Java?

int
float
String
boolean

Answer explanation

String is a reference type, not a primitive.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the default value of a reference variable in Java?

0
null
"" (empty string)
Undefined

Answer explanation

Reference variables default to null, meaning they do not reference an object until initialized.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the size of an int in Java?

8 bits
16 bits
32 bits
64 bits

Answer explanation

Java int is always 32-bit signed.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What will System.out.println(10 / 4); print?

2
2.5
3
2

Answer explanation

Integer division truncates the decimal, so 10 / 4 results in 2.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What will System.out.println((5 > 3) ? "Yes" : "No"); print?

Yes
No
true
false

Answer explanation

Since 5 > 3 is true, the ternary operator returns 'Yes'.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What will System.out.println(2 + "3"); print?

5
23
6
Compilation error

Answer explanation

2 is converted to a string, so '2' + '3' results in '23'.

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