Computer Knowledge
Programming Languages and Compilers
2,284 Questions
Programming languages and compilers involve the rules, syntax, and semantics used to write and execute software programs. Key areas include scripting languages, object oriented concepts, and parsing algorithms like top down parsers. Practice these computer science questions to build proficiency for technical and computer knowledge exams.
Object oriented languagesScripting languagesCompilers and parsersProgramming syntax
Programming Languages and Compilers Questions
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private
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local
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global
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none of the above
C
Correct answer
Explanation
Global variables are defined outside of any function and are accessible throughout the entire program, making them available to all parts of the code.
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value
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reference
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both of the above
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none of the above
B
Correct answer
Explanation
In C, arrays are passed to functions by passing the address of the first element, which is effectively passing by reference.
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if statement
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if - else statement
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switch statement
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none of the above
C
Correct answer
Explanation
The switch statement is the standard C construct for multiway branching, allowing a variable to be tested for equality against a list of values.
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local
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global
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both of the above
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none of the above
A
Correct answer
Explanation
Local variables are defined within a specific function or block and are only available within that scope, making them suitable for specific, short tasks.
A
Correct answer
Explanation
The dot operator (.) is used to access members of a structure or union variable.
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functions
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array
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structure
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union
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ch contains the address of char variable
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ch is a char variable
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ch is going to contain a char value
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none of these
A
Correct answer
Explanation
In C programming, the declaration char *ch defines ch as a pointer to a character, meaning ch stores the memory address of a character variable.
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scanf(“%s”,str);
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gets(str);
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getche(str);
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fgetchar(str);
B
Correct answer
Explanation
gets() is the appropriate function to read a string containing spaces from the keyboard into a character array.
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pointer to a variable
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pointer variable
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pointer to an int pointer
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none of these
A
Correct answer
Explanation
To swap two variables (a and b), you typically use one temporary variable (temp = a; a = b; b = temp;). While XOR swapping can be done with zero extra variables, the standard algorithmic approach taught in introductory programming uses one.
B
Correct answer
Explanation
The C programming language was developed at Bell Labs by Dennis Ritchie in the early 1970s.
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Self compiler
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Cross compiler
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Resident compiler
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None of these
B
Correct answer
Explanation
A cross compiler is a compiler that runs on one architecture (the host) but generates executable code for a different architecture (the target).
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Abstract algebra
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Linear algebra
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Boolean algebra
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Modern algebra
C
Correct answer
Explanation
George Boole developed Boolean algebra, which is the mathematical foundation for digital logic and computer circuit design.
B
Correct answer
Explanation
C is not an Object-Oriented Programming Language. It is a Structured Programming Language.
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top-down
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bottom-up
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virtual
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real-time
B
Correct answer
Explanation
It treats data as a critical element in the program development and does not allow it to flow freely around the system.