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answer1（答） What are the 1. main features of the C language (s)? A. is simple and compact, easy to use, flexible, easy to learn and use. B.C language is a structured programming language oriented. C.C language to allow direct digital, byte address and operate. D. data types. E.C language generation of target code of high quality. Answer: ABCDE 2. C language program by what? (Dan Xuan) A. subroutine B. main program and subprogram of C. function D. Answer: C 3. source program to run correctly, we must have what function? (Dan Xuan) The function A. printf function B. custom C. main function D. function is not needed Answer: C 4. the following legal identifier: (s) A. 3AB B. int C. ABC D. a_3 E. sum.a F. #abc G. _stu2 H. ABC f Answer: CDG 5. identify which of the following is a reserved word (s): A. char B. ABC C. printf D. Int E. float F. define G. include H. PI Answer: AEFG 6. which of the following is that user defined legal identifier (s)? A. P-S B. putchar C. double D. _908 E. *par F. sheep G. wind H. X Y! Answer: BDG What are the 7. basic types of C language (s): A. B. integer enumeration type C. array type D. pointer type E. character type F. structure type G. solid H. type space Answer: ABEG 8. this procedure in the constants are: (choose) #define PI 3.14 Void (main) { Int sum; Sum = 10 + 15; Printf (sum=%d\n, sum); Printf (result is 25\n); } This program is a constant: A. 10 B. sum C. 15 D. 25 E. main F. PI Answer: ACF 9. C language according to the hexadecimal constant integer division, are the following: (choose) A. sixteen hexadecimal constant B. decimal constant C. octal constant D. binary constant Answer: ABC 10.75 of the sixteen band ___ for writing, writing for ___ octal. 0x75 written for ___ octal, decimal notation for ___. 075 decimal ___ for writing, writing as sixteen hexadecimal ___. Answer: 0x4b 0113 0165117 61 0x3d 11. if you want to keep the constant 327 into a variable a, a can be defined as what type (s)? A. int B. char C. long D. float Answer: