Question

please answer all question

CSE 110 Introduction to Computer Science 41. An array of size 10, has only nine slots for storing values TRUE FALSE 42. When is the external name of the file used in the program? A. Any time you read or write to the file B. Never C. Only when reading from the file D. When opening the file stream 43. Creating a flow chart when designing a complex algorithm is a waste of time. TRUE 44. Using indentation can make our code much easier to read and debug. 45. Which of the following would be considered a good name for a function that converts FALSE TRUE FALSE temperatures from Fahrenheit to Celsiusi? A. calc B. convert_temp C. temp D. myfunction 46. It is legal to have a function with no arguments TRUE FALSE 47. When you add a value to a pointer, you are actually adding that number times the size of the data type referenced by the pointer. TRUE FALSE 48. You cannot have more than one input and one output stream open at any TRUE FALSE one time. TRUE FALSE 49. The variables (elements) stored in an array must be integers. 50. The String class lets you treat strings like other pre-defined data types. 51. With the string class, this would compare two strings if (strlsr2). 52. To use the string class, you must include the <string> library. 53. A pointer is the memory address of a variable. TRUE FALSE TRUE FALSE TRUE FALSE TRUE FALSE

Answer 1

41. FALSE  

eg: int a[10]

you can store 10 values.

42. d)ONLY WHEN OPENING THE FILE STREAM

eg:

FILE *fp;

fp = fopen("test.txt", "w+"); // we use filename only while opening the file stream

fprintf(fp, "writing..\n") // we use file pointer while writing to a file

fclose(fp);

43. FALSE

Since, flow chart accomodates all possible senarios of the problem and gives you an accurate algorithm. You can also cross check your algorithm with flow chart to uncover any discrepencies. Flow chart is used to design an algorithm.

44. TRUE

Proper spacing can improve code's readability and understandability.

45. convert-temp

your function name should always reflect its purpose. This can avoid a lot of confusion.

46. TRUE

it is perfectly alright to have a function withour any arguments. Such functions always make use of constants for calculation or simply to print something.

47. TRUE

if you have an int pointer *i. it will be referencing to address 1000 (i=1000 say). you increment the pointer by 1. this will add the size of integer to the base address which will give you 1004 ( size of int =4 (say) this can vary compiler to compiler). similarly if you add 2 to i, you are actually referencing address 1008 ( 1000+ (4*2))

48. FALSE

you can have more than one i/o different streams open simultaneously. But the stream( files) should not be same.

49. FALSE

It depends on the data type of the array. if it is an integer array you can store only integer elements. if it is a character array you can store character elements. Java also supports array of strings.

50. TRUE

in java and c++, String class can be used as data type to declare a variable of string type and store strings. In reality String is a class.Its constructor gets invoked when it is used.

51. TRUE

String s1="aaa"

String s2="aaa"

if (s1==s2) will result in TRUE

this is because s1 is created and it points to memory location 1000 which stores value "aaa". on executing 2nd statement s2 is not created instead it is poitning to the same location 1000. therefore it returns true.

This would not be true if s1 and s2 were created using NEW operator.

52. TRUE (C++)

FALSE (JAVA)

in java String class is in java.lang package which is imported by default.

53. TRUE

A pointer variable stores address of a variable.

eg : int *p;

p=&a // address of a is stored in pointer variable p

ALL THE BEST :)