Question

1. The logical operator ______________________ takes one operand and inverts its value, changing true to false and false to true.

	A.	&&
	B.	!=
	C.	II
	D.	!

The ___________________ operator takes two boolean expressions as operands; if both are true, then the result is true; otherwise the result is false.

	A.	$$
	B.	&&
	C.	||
	D.	!

1. What is the order of precedence of the operators that Java uses to evaluate a condition and selection statements to choose which instructions to execute based on whether a condition evaluates to true or false?

	A.	Equality operators, relational operators, logical OR, logical NOT, and logical AND.
	B.	Logical OR, Logical NOT, relation operators, equality operators, logical AND.
	C.	Relational operators, logical AND, equality operators, logical NOT, logical OR.
	D.	Logical NOT, relation operators, equality operators, logical AND, logical OR.

1. The ________________ statement evaluates an integer or character expression or a String, then compares the expression's value to case constants.

	A.	switch
	B.	nested if
	C.	if
	D.	if else

1. The __________________ operator is used in expressions where one or two values should be used depending on the evaluation of a condition.

	A.	if
	B.	?:
	C.	else
	D.	II

1. When we need exact precisions in calculations with decimal numbers, we can use the ________________________ class in the Java Class Library.

	A.	RoundingMode
	B.	BigInteger
	C.	BigDecimal
	D.	MathContext

1. The ___________________________ statement is used o perform certain set of operations for one set of data and do nothing for all other data.

	A.	nested if
	B.	if/else
	C.	if
	D.	switch

1. The ___________________________ statement is used o perform certain set of operations for one set of data and other operations for all other data.

	A.	case
	B.	if
	C.	switch
	D.	if/else

1. ________________ repeats a set of operations for each input item while a condition is true.

	A.	sentinel testing
	B.	control testing
	C.	nesting
	D.	looping

1. The ____________ loop is especially useful for event-controlled looping.

	A.	for
	B.	while
	C.	do while
	D.	if/else

1. If the loop condition evaluates to false ____________________________________________

	A.	the body of the while loop is executed.
	B.	the last item is evalauted.
	C.	the first item is evaluated.
	D.	the program immediately terminates.

1. A sentinel value in the loop signals ________________________________

	A.	the type of loop to be executed.
	B.	the number of total items to be processed.
	C.	the end of items to be processed.
	D.	the beginning of items to be procesed.

1. The ____________________ loop checks the loop condition after executing the loop body.

	A.	both for loop and while loop.
	B.	while
	C.	for
	D.	do/while

1. The ________________ loop is useful for count-controlled loops, that is, loops for which the number of iterations is known when the loop begins.

	A.	while
	B.	do/while
	C.	for
	D.	both do/while and for

1. When the for loop is encountered, what happens first?

	A.		the loop body is executed.
	B.		the initialization statement is executed.
	C.		the loop condition is evalauted.
	D.		the loop update statement is executed.

Answer 1

1.The logical operator ------------ takes one operand and inverts its value changing true to false and false to true

Answer : ! (not operator )performs one operand and inverts its value changinig true to false and false to true

2.The -------------- operator takes two boolean expression as operands if both are true ,then the results is true;otherwise the result is false

Answer: && operator performs two expressions are true than output is true otherwise false

3. What is the order of precedence of the operators that java uses to evalute a condition and selection statements to choose which instructions to executes based on whether a condition evalutes true or false?

Answer: LOgical operator, relational operator, equality operator, logical AND , logical OR

4. The ----------- statements evalutes an integer or character expression or string , then compares the expression's value to case constants.

Answer: Switch Statement evalutes int, char,string expressions are evalute

5. The ------------- operator is used in expression where one or two values should be used depending on the evalution of a condition

Answer: ?: (conditional operator) is evalutes one or two values be evalution of a condition

6.When we need to exact precision in calculations with decimal numbers, we can use the -------------- class in the java class library

Answer: BigDecimal

7. The ------------- statement is used to perform certain set of operations for one set of data and do nothhing for all other data

Answer: if statement is used to perform if condition is true and set of operations perform than nothing about all other data

8. The ----------statement is used to perform certain set of operations for one set of data for all other data

Answer: else-if statement is perform set of operations for all other data

9.------------ repeats a set of operations for each input item while a condition is true

Answer : looping is repeats opetations until condition is true

10. The ----------- loop is especially useful for event- controlled looping

Answer: do-while loop is a event-controlled loop

11. if the loop condition evalutes to false------------

Answer: the loop is immediately terminates

12. A sentinel value in the loop signals ----------

Answer: the type of loop is executed

13. The -------------- loop checks the loop condition after executing the loop body

Answer: both for and while loop

14. The -------------- loop is useful for count -controlled loops that is loops for which the number of iterations is known when the loop begins

Answer: both while and for

15. When the for loop is encounted ,what happens first ?

Answer: the initialization statement is executed first

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