MID TERM SAMPLE QUESTIONS (ANSWERS)

History of Computers
====================

1) At the lowest levels of a computer we have :
   *b) electronic circuits (hardware) only

2) Rate these from smallest to largest
   *a) bit, byte, kilobyte, megabyte, gigabyte

3) John Mauchly created the first :
   *c) electronic numerical integrator and calculator 

4) John Von Neumann :
   *c) is credited with the idea of the first stored program computers

5) Binary numbers are numbers in which base?
   *d)  2

6) Convert this base 10 number into an unsigned base 2 number
   230 in base 10 is ???? in base 2.
   *a) 1110 0110

7) Convert this UNSIGNED binary number to an unsigned octal number
   1110 0110 in binary is ??? in octal.
   *c) 346

7) Convert this UNSIGNED binary number to an unsigned hexidecimal number
   1110 0110 in binary is ?? in hexidecimal.
   *a) E6

8) Add these two unsigned binary numbers
      0010 1001
     +0111 0011
     ----------
  *d) 1001 1100

9) Subtract these 2 unsigned binary numbers
      0111 0001
     -0010 1001
     ----------
  *e) None of the above

10) To copy the file from /home/215/notes/week1.txt to your own directory you would type :
  *e) none of the above

11) The proper UNIX command to grant file permissions is :
  *c) chmod       example: chmod a+r asmt1.p

12) Which UNIX command allows you to read e-mail on our system?
  *a) pine

13) Compiling a program, then editing the Pascal program in EMACS will :
  *b) have no effect on the compiled file

14) UNIX is :
  *a) an operating system

15) Every Pascal Program needs the following :
  *e) a header and a body

16) Which statement executes a loop until a condition is true?
  *a) repeat

17)
  *a)   if (a=b) then write("Hi Mom!");

18)
  *b)   if (a==b) then write("Show me the way to go home....").

19)
  *e) { There are no errors in the above code }

20
  *a) b=readln();