1. Explain the difference between declaration and definition of a variable. Can you declare a variable without defining it? 2. What is the difference between a string and an array of type char? How...

1. Explain the difference between declaration and definition of a variable. Can you declare a variable without defining it?

2. What is the difference between a string and an array of type char? How many array elements does the string “abcd” use?

3. Between using 6 variables and an array of 6 elements, what considerations determine the choice of one scheme in preference to the other?

4. A signed char variable can be assigned (A) an integer not exceeding 255, (B) the constant “2”, (C) an integer between -127 and 128, (D) none of these.

5. The array intarr[20] needs (A) 20 bytes, (B) 20 X size of (int) bytes, (C) 40 bytes, (D) 80 bytes.