Oracle Exam 1Z0-149 Topic 2 Question 23 Discussion

Actual exam question for Oracle's 1Z0-149 exam

Question #: 23
Topic #: 2

[All 1Z0-149 Questions]

Which two are true about lexical units? (Choose two.)

ACharacter literals are case-sensitive.

BSpaces can be embedded in delimiters.

CIdentifiers include labels.

DA character literal with zero characters has the BOOLEAN value NULL.

EAll user-defined identifiers must start with an alphabet.

Show Suggested Answer

Suggested Answer: A, E

by Meaghan at Apr 12, 2024, 06:09 AM

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Ashton

6 months ago

I think option C is also true since identifiers can also include labels.

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Jeannetta

6 months ago

I'm not sure about option D. Can a character literal with zero characters really have the BOOLEAN value NULL?

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Rosita

6 months ago

I agree with Gail. Also, I believe option E is true since identifiers must start with an alphabet.

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Gail

6 months ago

I think option A is true because character literals are indeed case-sensitive.

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Mindy

6 months ago

I disagree with E) All user-defined identifiers must start with an alphabet.

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Clarence

7 months ago

I believe D) A character literal with zero characters has the BOOLEAN value NULL is also true.

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Gerry

7 months ago

I think C) Identifiers include labels is true.

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Florinda

8 months ago

I think C is true. Identifiers do include labels, right? At least that's what I remember from the lecture.

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Launa

8 months ago

But I'm not sure about B. Can you really embed spaces in delimiters? That seems a bit odd to me.

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Veta

8 months ago

Okay, let's see. Character literals are definitely case-sensitive, so A is true.

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Yolande

8 months ago

Hmm, I think I might know the answer. Let me work through this step-by-step.

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Oretha

8 months ago

Yeah, I agree. These are some pretty subtle distinctions. I'm going to have to think carefully about this one.

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Felicia

8 months ago

I'm not sure about this question. The concepts of lexical units seem a bit tricky to me.

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Eulah

7 months ago

B) Spaces can be embedded in delimiters.

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Ozell

7 months ago

A) Character literals are case-sensitive.

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