Bachelor of Computer Engineering C Language Flashcards
7 cards from real B CompE Bachelor of Computer Engineering practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Bachelor of Computer Engineering C Language flashcards as text
What is the result of the expression `5 >> 1` in C?
Answer: 2
Right-shifting 5 (binary 101) by 1 position yields 2 (binary 010).
Which storage class specifier in C limits a variable's visibility to the file in which it is declared?
Answer: static
A file-scope variable declared with `static` has internal linkage, making it invisible outside that translation unit.
In C, what does the `volatile` qualifier tell the compiler?
Answer: Do not cache the variable in a register; always read from memory
`volatile` prevents the compiler from optimizing accesses, ensuring every read/write goes to actual memory.
What is the output of: `printf("%d", sizeof('A'));` in a typical 32-bit C implementation?
Answer: 4
In C, character literals have type `int`, so `sizeof('A')` equals `sizeof(int)`, which is 4 on most 32-bit platforms.
Which function is used to release memory allocated by `malloc`?
Answer: free
`free()` is the standard C library function to deallocate memory previously allocated by `malloc`, `calloc`, or `realloc`.
What is a dangling pointer in C?
Answer: A pointer that points to memory that has been freed or gone out of scope
A dangling pointer references memory that is no longer valid, often because `free()` was called or the pointed-to local variable was destroyed.
In C, which of the following correctly declares a pointer to a function that takes an `int` and returns `double`?
Answer: double (*fp)(int);
`double (*fp)(int);` declares `fp` as a pointer to a function with an `int` parameter returning `double`.
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