Java Quiz

Which of the following are basic principles of object oriented programming?

• Modularity

• Encapsulation

• Inheritance

• Platform indpendence

'++' is a

• unary operator

• binary operator

• unary operand

• binary operand

Name the keyword which makes the variable as a class variable

What is the memory capacity (storage size) of short and float data type in bytes

• 1 byte and 4 bytes

• 2 bytes and 4 bytes

• 2 bytes and 8 bytes

• 1 bytes and 8 bytes

Which of the following is not a keyword?

• int

• public

• this

• by

Which is a similarity between if-else and switch case statement?

• They both can only be used for numerical comparisons
• They both require a break statement to exit the block of code
• They both allow the program to execute different blocks of code based on certain conditions.
• They both can only handle boolean conditions

Give the output of the following code:

String P = "20", Q ="19";

int a = Integer.parseInt(P);

int b = Integer.valueOf(Q);

System.out.println(a+""+b);

• 39

• 20''19

• 2019

• 3''9

What are the types of errors in Java?

• Syntax error

• Runtime Error

• Declaration Error

• Logical Error

State the data type and value of res after the following is executed:

char ch = '9';

res= Character.isDigit(ch);

• int

• double

• character

• boolean

Which of the following statement is true?

• Linear search works only on sorted arrays.

• In Binary search, each element of the array is checked against the target value until the element is found or end of the array is reached.

• Binary search works on only sorted arrays.

• In Linear search, array is successively divided into 2 halves and the target element is searched either in the first half or in the second half.