PRF 192 Exam Questions & Answers | 100% Correct | Verified | 2024 Version

B ---- C99 standard guarantees uniqueness of ____ characters for internal names. a) 31 b) 63 c) 12 d) 14 A ---- C99 standard guarantess uniqueness of _____ characters for external names. a) 31 b) 6 c) 12 d) 14 D ---- Which of the following is not a valid variable name declaration? a) int __a3; b) int __3a; c) int __A3; d) None of the mentioned C ---- Which of the following is not a valid variable name declaration? a) int _a3; b) int a_3; c) int 3_a; d) int _3a C ---- Variable names beginning with underscore is not encouraged. Why?a) It is not standardized b) To avoid conflicts since assemblers and loaders use such names c) To avoid conflicts since library routines use such names d) To avoid conflicts with environment variables of an operating system A ---- All keywords in C are in a) LowerCase letters b) UpperCase letters c) CamelCase letters d) None A ---- Variable name resolving (number of significant characters for uniqueness of variable) depends on a) Compiler and linker implementations b) Assemblers and loaders implementations c) C language d) None D ---- Which of the following is not a valid C variable name? a) int number; b) float rate; c) int variable_count; d) int $main; C ---- Which of the following is true for variable names in C? a) They can contain alphanumeric characters as well as special characters b) It is not an error to declare a variable to be one of the keywords(like goto, static) c) Variable names cannot start with a digit d) Variable can be of any lengthB ---- Which is valid C expression? a) int my_num = 100,000; b) int my_num = 100000; c) int my num = 1000; d) int $my_num = 10000; C ---- What is the output of this C code? #include stdio.h int main() { printf("Hello World! %d n", x); return 0; } a) Hello World! x; b) Hello World! followed by a junk value c) Compile time error d) Hello World! A ---- What is the output of this C code? #include stdio.h int main() { int y = 10000; int y = 34; printf("Hello World! %dn", y); return 0;} a) Compile time error b) Hello World! 34 c) Hello World! 1000 d) Hello World! followed by a junk value D ---- Which of the following is not a valid variable name declaration? a) float PI = 3.14; b) double PI = 3.14; c) int PI = 3.14; d) #define PI 3.14 C ---- What will happen if the below program is executed? #include stdio.h int main() { int main = 3; printf("%d", main); return 0; } a) It will cause a compile-time error b) It will cause a run-time error c) It will run without any error and prints 3 d) It will experience infinite looping D ---- What is the problem in following variable declaration? float 3Bedroom-Hall-Kitchen?; a) The variable name begins with an integerb) The special character '-' c) The special character '?' d) All of the mentioned B ---- Comment on the output of this C code? #include stdio.h int main() { int ThisIsVariableName = 12; int ThisIsVariablename = 14; printf("%d", ThisIsVariablename); return 0; } a) The program will print 12 b) The program will print 14 c) The program will have a runtime error d) The program will cause a compile-time error due to redeclaration A ---- Which of the following cannot be a variable name in C? a) volatile b) true c) friend d) export D ---- Comment on the output of this C code? #include stdio.h int main(){ int a[5] = {1, 2, 3, 4, 5}; int i; for (i = 0; i 5; i++) if ((char)a[i] == '5') printf("%dn", a[i]); else printf("FAILn"); } a) The compiler will flag an error b) Program will compile and print the output 5 c) Program will compile and print the ASCII value of 5 d) Program will compile and print FAIL for 5 times B ---- The format identifier '%i' is also used for _____ data type? a) char b) int c) float d) double B ---- Which data type is most suitable for storing a number 65000 in a 32-bit system? a) signed short b) unsigned short c) long d) int D ---- Which of the following is a User-defined data type? a) typedef int Boolean; b) typedef enum {Mon, Tue, Wed, Thu, Fri} Workdays;c) struct {char name[10], int age}; d) all of the mentioned C ---- What is the size of an int data type? a) 4 Bytes b) 8 Bytes c) Depends on the system/compiler d) Cannot be determined B ---- What is the output of this C code? #include stdio.h int main() { signed char chr; chr = 128; printf("%dn", chr); return 0; } a) 128 b) -128 c) Depends on the compiler d) None of the mentioned A ---- Comment on the output of this C code? #include stdio.h int main() {char c; int i = 0; FILE *file; file = fopen("", "w+"); fprintf(file, "%c", 'a'); fprintf(file, "%c", -1); fprintf(file, "%c", 'b'); fclose(file); file = fopen("", "r"); while ((c = fgetc(file)) != -1) printf("%c", c); return 0;