Test your C Skills
in [Learn C or C++]
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From: Additya on 11 Mar 2010 12:41 Hello friends , If you do want to test your C Skills online, this Quiz is for you. It is a multiple choice objective list of some good questions on C collected from placement papers of various software companies. Click below to take the quiz http://www.ezdia.com//Quiz-on-C-Programming/Content.do?id=1420 Hope you find this useful
From: Keith Thompson on 11 Mar 2010 14:42 Additya <addy.ind(a)gmail.com> writes: > If you do want to test your C Skills online, this Quiz is for you. > It is a multiple choice objective list of some good questions on C > collected from placement papers of various software companies. > Click below to take the quiz > > http://www.ezdia.com//Quiz-on-C-Programming/Content.do?id=1420 > > Hope you find this useful Not too bad; it's better than most such quizzes I've seen. In question "Which one of the following provides conceptual support for function calls?", none of the answers are actually things defined by the standard. (There is one answer that's probably more "correct" than the others, at least on most systems.) None of the answers to "Which one of the following will declare a pointer to an integer at address 0x200 in memory?" are correct, though one of them *might* be accepted with a warning by some compilers. The answers to the question "According to the Standard C specification, what are the respective minimum sizes (in bytes) of the following three data types: short; int; and long?" seem to assume that a byte is 8 bits. The correct answer is 1, 1, 1, though this can occur only on a system with CHAR_BIT >= 32. I just finished the quiz and submitted my answers, but it doesn't bother to tell me which answers are considered correct; there's just a screen that shows how others have answered. That's appropriate for a poll, but not for a quiz. I was going to post this on the web site, but I'm not interested in registering and accepting the terms to do so. -- Keith Thompson (The_Other_Keith) kst-u(a)mib.org <http://www.ghoti.net/~kst> Nokia "We must do something. This is something. Therefore, we must do this." -- Antony Jay and Jonathan Lynn, "Yes Minister"
From: Jerry Coffin on 12 Mar 2010 12:28 In article <2fadb909-3cc8-4aa2-b757-a2c33b7558e3 @m27g2000prl.googlegroups.com>, addy.ind(a)gmail.com says... > > Hello friends , > If you do want to test your C Skills online, this Quiz is for you. > It is a multiple choice objective list of some good questions on C > collected from placement papers of various software companies. > Click below to take the quiz > > http://www.ezdia.com//Quiz-on-C-Programming/Content.do?id=1420 I'll point out a few problems in addition to those Keith already posted. > What is a difference between a declaration and a definition of a > variable? None of the answers provided is entirely accurate. In particular, C has the concept of a "tentative definition", which (sort of) allows a number of definitions of a variable. See ยง6.9.2/2 of the C99 standard for details. > If a variable has been declared with file scope, as above, can it > safely be accessed globally from another file? Though it's pretty clear which answer is supposed to be correct, you'd use an "extern declaration". Your answer used the phrase "extern specifier", which has a perfectly valid meaning in C, but doesn't refer to a complete extern declaration. In fairness, you have to get pretty pedantic to notice or care about this defect though. Though Keith already pointed it out, I'll add a further comment on: > Which one of the following provides conceptual support for function > calls? None of this is really defined by C -- depending on the processor, what we usually call a stack frame can be built on what we'd normally think of as a stack (e.g., on x86), or in registers (e.g., on SPARC) or on the heap (e.g., on most IBM mainframes). Although the registers and dynamically allocated blocks from the heap are used in a stack- like fashion, demanding that somebody recognize this as "The system stack" is a bit of a stretch, IMO. > Which one of the following C operators is right associative? Officially, C doesn't really have either precedence or associativity (though, again, I'll admit the point is pretty pedantic). > According to the Standard C specification, what are the respective > minimum sizes (in bytes) of the following three data types: short; > int; and long? None of the answers given is correct. With a large enough size of byte, all of these could have a size (in bytes) of 1. You should probably change "byte" to "octet", or perhaps phrase the answer in terms of bits instead of bytes. > penny = one nickel = five dime = ten quarter = twenty-five > How is enum used to define the values of the American coins listed > above? Though it's not really related to C, I think the first line would benefit from adding some punctuation (e.g., commas or semicolons) between the items. I had to reread it a couple of times to be sure exactly what you were asking. As far as results go, Keith's right that simply seeing how others have answered the questions isn't really helpful for questions that have factually correct answers. Worse, it appears that your tabulation of answers isn't working quite right anyway. For example: Given: int var1; You give the following: Yes; it can be referenced through the extern specifier. 0 0% The 0 is clearly incorrect, as that's the answer I had just given... -- Later, Jerry.
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