Core Java Test

Name of the Student

Student Roll No

Division

• A
• B

1) Which of the following option leads to the portability and security of Java?

• a) Dynamic binding between objects
• b) Bytecode is executed by JVM
• c) The applet makes the Java code secure and portable
• d) Use of exception handling

2) Which of the following is not a Java features?

• a) Dynamic
• b) Architecture Neutral
• c) Use of pointers
• d) Object-oriented

3) ____ is used to find and fix bugs in the Java programs.

• a) JVM
• b) JRE
• c) JDK
• d) JDB

4. When an expression consists of int, double, long, float, then the entire expression will get promoted into a data type that is:

• a) float
• b) double
• c) int
• d) long

5. Which of the following operators can operate on a boolean variable? A. && B. == C. ?: D. +=

• a) C & B
• b) A & D
• c) A, B & D
• d) A, B & C

6. Out of these statements, which ones are incorrect?

• a. The Brackets () have the highest precedence
• b. The equal to = operator has the lowest precedence
• c. The addition operator + and the subtraction operator – have an equal precedence
• d. The division operator / has comparatively higher precedence as compared to a multiplication operator

7) What will be the output of the following Java program? class output { public static void main(String args[]) { double a, b,c; a = 3.0/0; b = 0/4.0; c=0/0.0; System.out.println(a); System.out.println(b); System.out.println(c); } }

• a) NaN
• b) Infinity
• c) 0.0
• d) all of the mentioned