Questões - Expression Language (EL)

Question 1

Consider the following code and select the correct statement from the options below. ${(5 + 3 + a > 0) ? 1 : 2}

Accepted Answer

It will print 1because the statement is valid.

Answer

It will print 2 because the statement is valid.

Answer

It will throw an exception because is undefined.

Answer

It will throw an exception because the expression’s syntax is invalid.

Question 2

Which statement best expresses the purpose of a tag library descriptor (TLD) in an EL function?

Accepted Answer

It matches function names to tags that can be used in the JSP.

Answer

It contains the Java code that will be compiled.

Answer

It invokes the Java method as part of the JSP.

Answer

It matches the tag library with a URI.

Question 3

Which of the following variables is not available for use in EL expressions?

Accepted Answer

contextScope

Answer

param

Answer

cookie

Answer

header

Answer

pageContext

Question 4

Which tags tell the web container where to find your TLD file in your filesystem?

Accepted Answer

<taglib-location></taglib-location>

Answer

<taglib-directory></taglib-directory>

Answer

<taglib-uri></taglib-uri>

Answer

<tld-directory></tld-directory>

Answer

<taglib-name></taglib-name>

Question 5

Which two of the following expressions won’t return the header’s accept field?

Accepted Answer

${header[accept]}

Accepted Answer

${header.'accept'}

Answer

${header.accept}

Answer

${header['accept']}

Answer

${header["accept"]}

Question 6

When writing a TLD, which tags would you use to surround fnName(int num), a Java method declared in a separate class?

Accepted Answer

<function-signature></function-signature>

Answer

<function-name></function-name>

Answer

<method-class></method-class>

Answer

<method-signature></method-signature>

Answer

<function-class></function-class>

Question 7

Which of the following method signatures is usable in EL functions?

Accepted Answer

public static expFun(void)

Answer

expFun(void)

Answer

private expFun(void)

Answer

public expFun(void)

Answer

public native expFun(void)

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