Uncover your misconceptions by answering conceptual questions
Conceptual Self-Check
Language:
Java
Concepts: Operator Answer 15 Concept Questions
In Java:
Addition has higher precedence than string concatenation
Addition has higher precedence than string concatenation
I am not sure what's right.
In Java:
Addition and string concatenation have same precedence
Addition and string concatenation have same precedence
In Java:
Square brackets are used to access an element in an array
Square brackets are used to access an element in an array
I am not sure what's right.
In Java:
Parenthesis are used to access an element in an array
Parenthesis are used to access an element in an array
In Java:
= compares two values
= compares two values
I am not sure what's right.
In Java:
= assigns a value to a variable
= assigns a value to a variable
In Java:
An assignment a=b is an expression and thus produces a value
An assignment a=b is an expression and thus produces a value
I am not sure what's right.
In Java:
An assignment a=b is not an expression
An assignment a=b is not an expression
In Java:
Member accesses cannot be chained together
Member accesses cannot be chained together
I am not sure what's right.
In Java:
Member accesses can be chained together
Member accesses can be chained together
In Java:
Method calls or field accesses cannot be chained to a constructor invocation
Method calls or field accesses cannot be chained to a constructor invocation
I am not sure what's right.
In Java:
Method calls or field accesses can be chained to a constructor invocation
Method calls or field accesses can be chained to a constructor invocation
In Java:
To test whether an expression is true or false, one can just use it
To test whether an expression is true or false, one can just use it
I am not sure what's right.
In Java:
To test whether an expression is true or false, one must compare it to true or to false
To test whether an expression is true or false, one must compare it to true or to false
In Java:
o==p compares the references stored in the variables o and p
o==p compares the references stored in the variables o and p
I am not sure what's right.
In Java:
o==p compares the objects referred to by variables o and p
o==p compares the objects referred to by variables o and p
In Java:
To map a boolean expression to a boolean, one can just use it
To map a boolean expression to a boolean, one can just use it
I am not sure what's right.
In Java:
To map a boolean expression to a boolean, a conditional operator is necessary
To map a boolean expression to a boolean, a conditional operator is necessary
In Java:
A single piece, like a literal or name, also is an expression
A single piece, like a literal or name, also is an expression
I am not sure what's right.
In Java:
Expressions must consist of more than one piece
Expressions must consist of more than one piece
In Java:
&& and || evaluate their right operand only if absolutely necessary
&& and || evaluate their right operand only if absolutely necessary
I am not sure what's right.
In Java:
&& and || always evaluate both operands
&& and || always evaluate both operands
In Java:
& is only a bitwise AND
& is only a bitwise AND
I am not sure what's right.
In Java:
& for boolean operands is a logical AND
& for boolean operands is a logical AND
In Java:
Pre-increment in update part of for loop means same as pre-increment anywhere else
Pre-increment in update part of for loop means same as pre-increment anywhere else
I am not sure what's right.
In Java:
Pre-increment in update part of for loop means increment before loop body
Pre-increment in update part of for loop means increment before loop body
In Java:
Chained accesses are invoked from left to right
Chained accesses are invoked from left to right
I am not sure what's right.
In Java:
Chained accesses are invoked from right to left
Chained accesses are invoked from right to left
In Java:
String concatenation stringifies non-String operand expressions
String concatenation stringifies non-String operand expressions
I am not sure what's right.
In Java:
String concatenation evaluates non-String operand expressions and casts value to String
String concatenation evaluates non-String operand expressions and casts value to String