Engineering MCQs

Which of the following is not a type of a 4GL? One originating _________________?

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A. on Lisp machine
B. on report generators
C. from database query languages
D. from GUI creators
✅ The correct answer is option A.
Explanation: Fifth-generation programming language are built on LISP.

What command is used with file named ‘letter’ to remove the executable permission from the user and assign read permission to the group and others ?

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A. chmod go + x, u – x letter
B. chmod g – x, uo + r letter
C. chmod go + r, u + x letter
D. chmod u – x, go + r letter
✅ The correct answer is option D.

Suppose a class has public visibility. In this class we define a protected method. Which of the following statements is correct ?

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A. From within protected methods you do not have access to public methods.
B. This method is only accessible from inside the class itself and from inside all subclasses.
C. In a class, you cannot declare methods with a lower visibility than the visibility of the class in which it is defined.
D. This method is accessible from within the class itself and from within all classes defined in the same package as the class itself.
✅ The correct answer is option D.

The proper definition of a modern digital computer is_____________________?

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A. an electronic automated machine that can solve problems involving words and numbers
B. a more sophisticated and modified electronic pocket calculator
C. any machine that can perform mathematical operations
D. a machine that works on binary code
✅ The correct answer is option A.