$2.$ Can a variable declared within an if statement be accessed outside of that if statement?

A$.$ Yes, it can.

B$.$ No$,$ it cannot.

C$.$ It depends on whether the declaration executes.

D$.$ Only if the variable is defined as global.

$3.$ What is the result of the logical operation True and False?

A$.$ True B$.$ False C$.$ None D$.$ Error

$4.$ Which logical operator in Python returns True if at least one of the operands is

True?

A$.$ and B$.$ or C$.$ not D$.$ is

$5.$ When would you typically use a conditional expression in Python?

A$.$ When you need to execute a block of code repeatedly.

B$.$ When you need to iterate over a known sequence of elements.

C$.$ When you need to assign a value based on a condition.

D$.$ When you want to handle errors and exceptions.

$6.$ What happens if none of the conditions in an if$-$elif$-$else block are met?

A$.$ The program terminates.

B$.$ The block of code associated with the else statement is executed.

C$.$ The program moves to the next line of code outside the if$-$elif$-$else block.

D$.$ An error is raised.

$7.$ When would you typically use an elif statement instead of multiple if statements?

A$.$ When you want to provide a default block of code to execute when none of the

previous conditions are met.

B$.$ When you have multiple conditions to check, but only one of them should

trigger.

C$.$ When you need to execute a block of code repeatedly.

D$.$ When you want to handle specific cases within a larger set of conditions.

CS$303$E Week $4$ Worksheet: Selections $3$

$8.$ Consider the expression x $>=0$ or y $<10.$ If we assume x is equal to $10,$ and y

is equal to $5,$ then... $($hint: think of short$-$circuit evaluation$)$

A$.$ Python will evaluate both conditions in left$-$right order to determine whether

the expression is True.

B$.$ Python will evaluate both conditions in right$-$left order to determine whether

the expression is True.

C$.$ Python will evaluate only the second condition, y $<10.$

D$.$ Python will evaluate only the first condition, x $>=0.$

$9.$ Which of the following statements is true?

A$.($x $>=5$ and x $<15)$ is the same as $(5<=$ x $<15)$

B$.($y $>0$ or y $<-10)$ is the same as y $>0$ and y $<-10$

C$.($x $>0$ or x $<-5$ and y $<0)$ is the same as

$(($x $>0$ or x $<-5)$ and y $<0)$

D$.$ A and C are both true

$10.$ Which of the following is equivalent to the expression

$($p $+$ q $>$ r$)$ and $($s $-$ t $<=$ u$)?$

A$.($p $+$ q $>$ r$)$ and not $($s $-$ t $>=$ u$)$

B$.$ not $($p $+$ q $<$ r$)$ and $($s $-$ t $<=$ u$)$

C$.($p $-$ q $<=$ r$)$ and $($t $-$ s $>$ u$)$

D$.$ not $(($p $+$ q $<=$ r$)$ or $($s $-$ t $>$ u$))$

$11.$ What does the expression $5+10*2//3-4$ evaluate to$?$

A$.6$ B$.7$ C$.8$ D$.9$