OPERATORS

Question 1

What are operators?

Answer 1

Operators are special symbols that perform specific operations on one, two, or three operands, and then return a result.

Question 2

What is the operator precedence?

Answer 2

See phone for pic

Question 3

What is an assignment operator?

Answer 3

’=’
• Its purpose is to assign the value on its right to the operand on its left. E.g.
• int marks = 0;

Question 4

What is concatenation?

Answer 4

‘Adding’ two strings

Question 5

What are unary operators?

Answer 5

• The unary operators require only one operand.
• They perform various operations such as incrementing/decrementing a value by one, negating an expression, or inverting the value of a boolean.

Question 6

What are the three conditional operators?

Answer 6

• && Conditional-AND
• || Conditional-OR
• ?: - shorthand for an if-then-else statement

Question 7

What are the bitwise and bit shift operators?

Answer 7

1.The unary bitwise complement operator “~” inverts a bit pattern; making every “0” a “1” and every “1” a “0”.

2.The signed left shift operator “<>” shifts a bit pattern to the right. The bit pattern is given by
the left-hand operand, and the number of positions to shift by the right-hand operand.

3.The unsigned right shift operator “»>” shifts a zero into the leftmost position, while the leftmost position after “»” depends on sign extension.

4. The bitwise & operator performs a bitwise AND operation.
5. The bitwise ^ operator performs a bitwise exclusive OR operation.
6. The bitwise | operator performs a bitwise inclusive OR operation.

Question 8

What is The Type Comparison Operator instanceof

Answer 8

• The instanceof operator compares an object to a specified type.
• One can use it to test if an object is an instance of a class, an instance of a subclass, or an instance of a class that implements a particular interface.

Question 9

List all the types of operators

Answer 9

1. Assignment Operators
2. Arithmetic Operators
3. Unary Operators
4. Equality/Relational Operators
5. Conditional Operators
6. Bitwise Operators
7. Bit Shift Operators

Question 10

The do while asterisk thing

Answer 10

*see doc