Tag: web technology

Questions Related to web technology

Which of the following denote the method used for compatible type conversions?
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  1. TypeCov()

  2. Type()

  3. CTyp()

  4. CType()

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Correct Option: D

Constants are declared using the keyword
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  1. Constant

  2. Const

  3. Consta

  4. Fixed

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Correct Option: B

Which keyword can protect a class in a package from accessibility by the classes outside the package?

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  1. private

  2. b.final

  3. c.protected

  4. d.don't use any keyword at all (make it default)

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Correct Option: D

Which of the following statements about abstract methods/classes in Java are true? 1. An abstract class cannot be instantiated. 2. Constructors cannot be abstract. 3. A subclass of an abstract class must defined the abstract methods. 4. Static methods may be declared abstract.

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  1. Line 1, line 2 and line 3 only

  2. b.Line 1 only

  3. c.Line 1 and line 2 only

  4. d.Line 2 only

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Correct Option: C

The use of protected keyword to a member in a class will restrict its visibility as follows:
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  1. Visible only inside the package.

  2. b.Visible only in the class and its subclass in the same package.

  3. c.Visible in all classes in the same package and subclasses in other packages.

  4. d.Visible only in the class where it is declared.

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Correct Option: C

Which of the following are keywords? (A) switch (B) integer (C) default (D) boolean (E) object

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  1. (B) & (C)

  2. b. (E)

  3. c. (A) & (C)

  4. d. (D)

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Correct Option: C

The keywords reserved but not used in the initial version of Java are: (A) union (B) const (C) inner (D) goto (E) boolean (F) synchronized

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  1. All of these.

  2. b. (C) & (E)

  3. c. (A), (C) & (E)

  4. d. (B),(C) & (D)

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Correct Option: D

Which of the following are not keywords? (A) NULL (B) implements (C) protected (D) extended (E) string

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  1. (D) & (E)

  2. b. (A), (D) & (E)

  3. c. (D)

  4. d. (C), (D) & (E)

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Correct Option: B

AI Explanation

To determine which options are not keywords, we need to understand what keywords are in programming.

Keywords are predefined reserved words in a programming language that have special meanings and cannot be used as variable names or identifiers. These keywords are typically used to define the syntax and structure of the programming language.

Now, let's go through each option to determine which ones are not keywords:

Option A) (D) & (E) - This option includes (D) and (E) as not keywords. (D) is "extended" and (E) is "string". "extended" is not a keyword, but "string" is a keyword in many programming languages.

Option B) (A), (D) & (E) - This option includes (A), (D), and (E) as not keywords. We have already determined that (D) is not a keyword, and (A) is "NULL" which is also not a keyword. However, (E) is "string" which is a keyword.

Option C) (D) - This option includes (D) as not a keyword, which is correct.

Option D) (C), (D) & (E) - This option includes (C), (D), and (E) as not keywords. We have already determined that (D) is not a keyword. (C) is "protected" which is a keyword in many programming languages. (E) is "string" which is also a keyword.

Based on the above analysis, the correct answer is B. The options (A), (D), and (E) are not keywords.

We would like to make a member of a class visible in all subclasses regardless of what package they are in. Which one of the following keywords would achieve this?
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  1. private

  2. 0

  3. c. private OR protected

  4. d. protected

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Correct Option: C

The keywords reserved but not used in the initial version of Java are: (A) union (B) const (C) inner (D) goto (E) boolean (F) synchronized

technology web technology

  1. All of these.

  2. b. (C) & (E)

  3. c. (A), (C) & (E)

  4. d. (B),(C) & (D)

Show answer
Correct Option: C